US20060011423A1 - Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments - Google Patents
Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments Download PDFInfo
- Publication number
- US20060011423A1 US20060011423A1 US11/231,169 US23116905A US2006011423A1 US 20060011423 A1 US20060011423 A1 US 20060011423A1 US 23116905 A US23116905 A US 23116905A US 2006011423 A1 US2006011423 A1 US 2006011423A1
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- US
- United States
- Prior art keywords
- pivot member
- balancing mechanism
- brake
- force balancing
- cable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/04—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting mechanically
- B60T11/06—Equalising arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/04—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting mechanically
- B60T11/046—Using cables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
- B62L1/00—Brakes; Arrangements thereof
- B62L1/02—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements
- B62L1/06—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged
- B62L1/10—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis
- B62L1/14—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis the elements being mounted on levers pivotable about different axes
- B62L1/16—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis the elements being mounted on levers pivotable about different axes the axes being located intermediate the ends of the levers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
- B62L3/00—Brake-actuating mechanisms; Arrangements thereof
- B62L3/02—Brake-actuating mechanisms; Arrangements thereof for control by a hand lever
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20396—Hand operated
- Y10T74/20402—Flexible transmitter [e.g., Bowden cable]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20396—Hand operated
- Y10T74/20402—Flexible transmitter [e.g., Bowden cable]
- Y10T74/20408—Constant tension sustaining
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/20—Control lever and linkage systems
- Y10T74/20396—Hand operated
- Y10T74/20402—Flexible transmitter [e.g., Bowden cable]
- Y10T74/20462—Specific cable connector or guide
Definitions
- the present invention relates generally to bicycle braking systems, and in particular to a bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments.
- a rear brake assembly of a bicycle includes a rear hand brake lever mounted upon handlebars of the bicycle.
- the rear brake assembly further includes a pair of brake arms mounted to a bicycle frame for braking of a rear wheel of the bicycle.
- the brake arms are commonly of a U-brake configuration.
- Some form of cabling interconnects the rear hand brake lever to the brake arms. Squeezing of the rear hand brake lever imparts tension into such cabling which results in actuation of the brake arms.
- brake pads are attached to each brake arm and are cooperatively configured to apply forces against rear wheel in a pinching manner for braking of the rear wheel. Design focus has been placed upon the cabling configuration between the rear hand brake lever and the rear brake arms.
- a cable detangler typically includes a detangler ball bearing set with inner and outer races. Squeezing of the rear hand brake lever pulls upon a cable (sometimes two cables) that terminates at one of the races of the detangler ball bearing set. A pair of rear main brake cables is routed to extend from the other race rearward along the bicycle frame to the rear brake arms. This configuration is commonly referred to as a dual rear brake cable configuration. As such, it is understood that the cable detangler allows for transmission of the cable tension initiated by the squeezing of the rear brake lever through the cable detangler while freeing the handlebars to spin in relation to the bicycle frame.
- An aspect of the present invention can be regarded as a dual cable force balancing mechanism for use with a pair of main brake cable segments and a pair of rear brake arms of a bicycle.
- the dual cable force balancing mechanism includes a brake arm actuation assembly defining a longitudinal axis positionable between the main brake cable segments.
- the brake arm actuation assembly is attachable to the rear brake arms.
- the dual cable force balancing mechanism further includes a pivot member including main attachment portions disposed about the longitudinal axis for respectively attaching the main cable segments.
- the pivot member is rotatably coupled to the brake arm actuation assembly for pivoting the pivot member with respect to the longitudinal axis.
- dual cable force balancing mechanism may be used with a bicycle having a cable detangler for allowing handlebars of the bicycle to freely rotate.
- the dual cable force balancing mechanism may be installed with the main brake cable segments connected to the cable detangler.
- the present invention recognizes that unequal tension in the main brake cable segments is a significant underlying cause of the cable flop phenomenon associated with the cable detangler when the handlebars are fully rotated. Such unequal tension may be a result of relative unequal lengths of the main brake cable segments that may result from loose manufacturing tolerances, improper installation, and defects in and wear of the various brake assembly components.
- the pivot member allows for the dual cable force balancing mechanism to “actively” compensate or adjust for unequal lengths of the main brake cable segments during rotation of the handlebars of the bicycle. This allows for the transmission of force between the dual cable force balancing mechanism and the cable detangler substantially equally through the two main brake cable segments to mitigate the cable flop phenomenon.
- the brake arm actuation assembly may include a pair of rear brake cable segments attachable to the rear brake arms. Each of the rear brake cable segments is disposed in mechanical communication with the pivot member.
- the brake arm actuation assembly may further include a hanger body.
- the hanger body is rotatably coupled to the pivot member.
- the hanger body includes rear attachment portions respective positionable about the longitudinal axis.
- the rear brake cable segments are attached to the hanger body respectively at the rear attachment portions.
- the hanger body may include a lip with the rear attachment portions disposed along the lip.
- the rear brake cable segments may be integrated into a single cable and the lip may be configured to engage the rear brake cable segments with the rear brake cable segments being looped about the lip.
- the dual cable force balancing mechanism may include a pair of rear brake cable segments attached to the rear brake arms. Each of the rear brake cable segments is disposed in mechanical communication with the pivot member.
- the dual cable force balancing mechanism may be as described above.
- the bicycle frame may include a seat post portion, and the dual cable force balancing mechanism may be disposed between the seat post portion and the rear brake arms.
- FIG. 2 is an enlarged exploded perspective view of the dual cable force balancing mechanism of FIG. 1 as shown with portions of main brake cable segments and portions of rear brake cable segments;
- FIG. 3 is a plan view of the dual cable force balancing mechanism of FIG. 1 as assembled, as shown with portions of the main brake cable segments, the rear brake cable segments, and rear brake arms;
- FIG. 7 is a plan view similar t the view of FIG. 3 , however, of a dual cable force balancing mechanism according to another aspect of the present invention.
- FIG. 10 is a top view of the dual cable force balancing mechanism of FIG. 9 as seen along axis 10 ⁇ 10 of FIG. 9 .
- the dual cable force balancing mechanism 12 includes a brake arm actuation assembly 47 defining a longitudinal axis 50 positionable between the main brake cable segments 40 , 42 .
- the brake arm actuation assembly 47 is attachable to the rear brake arms 30 , 32 .
- the dual cable force balancing mechanism 12 further includes a pivot member 56 including main attachment portions 58 , 60 disposed about the longitudinal axis 50 for respectively attaching the main brake cable segments 40 , 42 .
- the pivot member 56 is rotatably coupled to the brake arm actuation assembly 47 for pivoting the pivot member 56 with respect to the longitudinal axis 50 .
- dual cable force balancing mechanism 12 may be used with the bicycle 10 having the cable detangler 38 for allowing the handlebars 20 of the bicycle 10 to freely rotate.
- the dual cable force balancing mechanism 12 may be installed with the main brake cable segments 40 , 42 connected to the cable detangler 38 .
- the present invention recognizes that unequal tension in the main brake cable segments 38 is a significant underlying cause of the cable flop phenomenon associated with the cable detangler 38 when the handlebars 20 are fully rotated. Such unequal tension may be a result of relative unequal lengths of the main brake cable segments 40 , 42 that may result from loose manufacturing tolerances, improper installation, and defects in and wear of the various brake assembly components.
- the pivot member 56 allows for the dual cable force balancing mechanism 12 to “actively” compensate or adjust for unequal lengths of the main brake cable segments 40 , 42 during rotation of the handlebars 20 of the bicycle 10 .
- the pivot action of the pivot member 56 is indicated in FIG. 3 with the curved double-headed arrows. This pivot action allows each of the two main brake cables 40 , 42 to transmit a substantially equal force from the cable detangler 38 to the brake arm actuation assembly 47 to mitigate the cable flop phenomenon.
- the pivot action allows the dual cable force balancing mechanism 12 to perform a force balancing in the transfer of tension initiated by the pulling of the rear brake lever 28 to actuate the rear brake arms 30 , 32 .
- the main brake cable segments 40 , 42 are formed and routed to be generally parallel adjacent the dual cable force balancing mechanism 12 .
- the main brake cable segments 40 , 42 are engaged with the dual cable force balancing mechanism 12 with the main brake cable segments 40 , 42 adjacent the dual cable force balancing mechanism 12 being generally aligned with the longitudinal axis 50 .
- the main brake cable segments 40 , 42 may be engaged to the pivot member 56 in a variety ways.
- the pivot member 56 takes the form of a cross bar having opposing ends 64 , 66 and a central portion 68 .
- the main attachment portions 58 , 60 are respectively disposed adjacent the opposing ends 64 , 66 .
- a fitting 70 is attached to each of the opposing ends 64 , 66 with a fastener 72 .
- the fittings 70 and the pivot member 56 are cooperatively configured to respectively capture and clamp the main brake cable segments 40 , 42 at the main attachment portions 58 , 60 .
- the fasteners 72 may each be received in fastener engagement holes 74 formed in the pivot member 56 .
- the main attachment portions 58 , 60 may each include a groove 76 as shown in FIG. 2 . Each groove 76 is formed to respectively accommodate and receive the main brake cable segments 40 , 42 for secure engagement and desired positioning of the main brake cable segments 40 , 42 .
- the brake arm actuation assembly 47 may include the pair of rear brake cable segments 44 , 46 .
- the rear brake cable segments 44 , 46 may be attachable to the rear brake arms 30 , 32 .
- Each of the rear brake cable segments 44 , 46 may be disposed in mechanical communication with the pivot member 56 .
- the brake arm actuation assembly 47 may further include a hanger body 48 .
- the hanger body 48 is rotatably coupled to the pivot member 56 .
- the hanger body includes rear attachment portion 52 , 54 respectively positionable about the longitudinal axis 50 .
- the rear brake cable segments 44 , 46 are attached to the hanger body 48 respectively at the rear attachment portions 52 , 54 .
- the rear brake cable segments 44 , 46 are respectively attached to the rear brake arms 30 , 32 .
- the rear brake arms 30 , 32 may each include a cable end 84 and an opposing brake pad end 86 .
- the brake pad ends 86 each respectively support the brake pads 62 .
- Fasteners 88 may be used to clamp down and attach the rear brake cable segments 44 , 46 to the cable ends 84 . It is contemplated that the rear brake cable segments 44 , 46 may be integrally formed as shown.
- the bicycle 10 including the bicycle frame 14 , the rear wheel 18 supported by the bicycle frame 14 , and a rear brake assembly including the rear brake lever 28 , the main brake cable segments 40 , 42 , the rear brake arms 30 , 32 , the rear brake cable segments 44 , 46 , and the dual cable force balancing mechanism 12 .
- the bicycle frame 14 may include a seat post portion 90 as shown in FIG. 1 , and the dual cable force balancing mechanism 12 may be disposed between the seat post portion 90 and the rear brake arms 30 , 32 .
- Fasteners 102 and fittings 104 may be used to respectively clamp the rear brake cable segments 96 to the hanger body 92 at the rear attachment portions 98 , 100 .
- the rear brake cable segments 96 may be rotatably coupled to the hanger body 94 as indicated by the double-headed arrows.
- FIG. 5 there is depicted a plan view similar to the view of FIG. 3 , however of a dual cable force balancing mechanism 106 according to yet another aspect of the present invention.
- FIG. 6 is a side view of the dual cable force balancing mechanism 106 of FIG. 5 as seen along axis 6 - 6 .
- the dual cable force balancing mechanism 106 is similar in configuration to dual cable force balancing mechanism 12 , however with the differences noted, and like reference numerals indicate like structures.
- the dual cable force balancing mechanism 106 includes a pivot member 112 rotatably coupled to a hanger body 114 .
- the pivot member 112 may take the form of a pulley.
- the pivot member 112 includes a central portion 116 and the pivot member 112 is attached to the hanger body 114 at the central portion 116 .
- a fastener 118 such as a pin, may be used to couple the pivot member 112 with the hanger body 114 .
- the pivot member 112 is configured to engage the main brake cable segments 108 , 110 .
- the pivot member 112 may be configured to engage the main brake cable segments 108 , 110 with the main brake cable segments 108 , 110 being looped about the pivot member 112 .
- the pivot member 112 includes main attachments portions 120 , 122 which are disposed along a radially outward facing peripheral groove 124 (as seen in cross section in FIG. 6 ).
- the hanger body 114 may include a pivot member support including first and second plates 126 , 128 .
- the pivot member 112 is rotatably connected to and between the first and second plates 126 , 128 .
- a lip 130 extends between the first and second plates 126 , 128 .
- the lip 130 may be configured to engage the rear brake cable segments 44 , 46 .
- the lip 130 includes rear attachment portions 132 , 134 of the hanger body 114 .
- FIG. 7 there is depicted a plan view similar to the view of FIG. 3 , however of a dual cable force balancing mechanism 136 according to yet another aspect of the present invention.
- FIG. 8 is a top view of the dual cable force balancing mechanism 136 of FIG. 7 as seen along axis 8 - 8 .
- the dual cable force balancing mechanism 136 is similar in configuration to dual cable force balancing mechanism 12 , however with the differences noted, and like reference numerals indicate like structures.
- this embodiment features a pivot member 138 that may be rotatably coupled to the main brake cable segments 40 , 42 as indicated with double-headed arrows.
- the main brake cable segments 40 , 42 may pass through rotatable fasteners 140 located at main attachment portions 142 , as shown in FIG. 8 .
- the pivot member 138 may include a pivot pin element 144 disposed between the main attachment portions 142 and positionable orthogonal to the longitudinal axis 50 .
- there are provided rear brake cable segments 146 that are integrally formed and are joined at the pivot pin element 144 .
- the rear brake cable segments 146 may be formed of a single spring wire.
- the rear brake cable segments 146 are cooperatively wound about the pin element 144 .
- the dual cable force balancing mechanism 136 includes a brake arm actuation assembly 148 that is simply formed of the rear brake cable segments 146 .
- the pivot member 138 may rotate with respect to the brake arm actuation assembly 148 about the pivot pin element 144 .
- the use of a spring wire may serve a dual purpose of not only transferring force from the main brake cable segments 40 , 42 to the rear brake arms 30 , 32 , but also may act as a return spring for positioning the rear brake arms 30 , 32 prior to and after actuation.
- FIG. 9 there is depicted a plan view similar to the view of FIG. 3 , however of a dual cable force balancing mechanism 150 according to yet another aspect of the present invention.
- FIG. 10 is a top view of the dual cable force balancing mechanism 150 of FIG. 9 as seen along axis 10 ⁇ 10 .
- the dual cable force balancing mechanism 150 is similar in configuration to dual cable force balancing mechanism 150 , however with the differences noted, and like reference numerals indicate like structures.
- this embodiment features a pivot member 152 that may be coupled to the main brake cable segments 40 , 42 at main attachment portions 154 .
- the pivot member 152 may include a pivot pin element 156 disposed between the main attachment portions 154 and positionable orthogonal to the longitudinal axis 50 .
- the rear brake cable segments 146 are cooperatively loop over the pivot pin element 156 .
- the dual cable force balancing mechanism 150 includes a brake arm actuation assembly 160 that is simply formed of the rear brake cable segments 158 .
- the pivot member 138 may rotate and be disposed in sliding contact with the brake arm actuation assembly 160 at the pivot pin element 156 .
Abstract
A dual cable force balancing mechanism for use with a pair of main brake cable segments and a pair of rear brake arms of a bicycle. The dual cable force balancing mechanism includes a brake arm actuation assembly defining a longitudinal axis positionable between the main brake cable segments. The brake arm actuation assembly is attachable to the rear brake arms. The dual cable force balancing mechanism further includes a pivot member including main attachment portions disposed about the longitudinal axis for respectively attaching the main cable segments. The pivot member is rotatably coupled to the brake arm actuation assembly for pivoting the pivot member with respect to the longitudinal axis.
Description
- This application is a continuation patent application of U.S. patent application Ser. No. 10/684,010, filed on Oct. 10, 2003, and claims priority thereto, the contents of which are incorporated herein by reference.
- 1. Field of the Invention
- The present invention relates generally to bicycle braking systems, and in particular to a bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments.
- 2. Description of the Prior Art
- Bicycle trick or stunt riding has placed specialized requirements upon the design of rear brake assemblies. A rear brake assembly of a bicycle includes a rear hand brake lever mounted upon handlebars of the bicycle. The rear brake assembly further includes a pair of brake arms mounted to a bicycle frame for braking of a rear wheel of the bicycle. The brake arms are commonly of a U-brake configuration. Some form of cabling interconnects the rear hand brake lever to the brake arms. Squeezing of the rear hand brake lever imparts tension into such cabling which results in actuation of the brake arms. In this regard, brake pads are attached to each brake arm and are cooperatively configured to apply forces against rear wheel in a pinching manner for braking of the rear wheel. Design focus has been placed upon the cabling configuration between the rear hand brake lever and the rear brake arms.
- Use of a cable detangler or cable decoupler allows for riders to do various tricks involving spinning of the handlebars without limitations of the brake cabling being twisted about the base of the handlebars after only a single rotation. As such, trick or BMX style bicycles are characterized as having a rear brake assembly with such a cable detangler. A cable detangler typically includes a detangler ball bearing set with inner and outer races. Squeezing of the rear hand brake lever pulls upon a cable (sometimes two cables) that terminates at one of the races of the detangler ball bearing set. A pair of rear main brake cables is routed to extend from the other race rearward along the bicycle frame to the rear brake arms. This configuration is commonly referred to as a dual rear brake cable configuration. As such, it is understood that the cable detangler allows for transmission of the cable tension initiated by the squeezing of the rear brake lever through the cable detangler while freeing the handlebars to spin in relation to the bicycle frame.
- During a trick involving spinning of the handlebars, the inner and outer races of the cable detangler may tend to reciprocally “flop” or snap from position to position associated with the limits of such “play” in the ball bearing races. This flopping impairs the smooth spinning of the handlebars and often results in jerky movement and an undesirable audible clicking. Accordingly, there is a need in the art for an improved bicycle rear brake assembly configuration in comparison to the prior art.
- An aspect of the present invention can be regarded as a dual cable force balancing mechanism for use with a pair of main brake cable segments and a pair of rear brake arms of a bicycle. The dual cable force balancing mechanism includes a brake arm actuation assembly defining a longitudinal axis positionable between the main brake cable segments. The brake arm actuation assembly is attachable to the rear brake arms. The dual cable force balancing mechanism further includes a pivot member including main attachment portions disposed about the longitudinal axis for respectively attaching the main cable segments. The pivot member is rotatably coupled to the brake arm actuation assembly for pivoting the pivot member with respect to the longitudinal axis.
- It is contemplated that dual cable force balancing mechanism may be used with a bicycle having a cable detangler for allowing handlebars of the bicycle to freely rotate. The dual cable force balancing mechanism may be installed with the main brake cable segments connected to the cable detangler. The present invention recognizes that unequal tension in the main brake cable segments is a significant underlying cause of the cable flop phenomenon associated with the cable detangler when the handlebars are fully rotated. Such unequal tension may be a result of relative unequal lengths of the main brake cable segments that may result from loose manufacturing tolerances, improper installation, and defects in and wear of the various brake assembly components. The pivot member allows for the dual cable force balancing mechanism to “actively” compensate or adjust for unequal lengths of the main brake cable segments during rotation of the handlebars of the bicycle. This allows for the transmission of force between the dual cable force balancing mechanism and the cable detangler substantially equally through the two main brake cable segments to mitigate the cable flop phenomenon.
- According to various embodiments, the brake arm actuation assembly may include a pair of rear brake cable segments attachable to the rear brake arms. Each of the rear brake cable segments is disposed in mechanical communication with the pivot member. The brake arm actuation assembly may further include a hanger body. The hanger body is rotatably coupled to the pivot member. The hanger body includes rear attachment portions respective positionable about the longitudinal axis. The rear brake cable segments are attached to the hanger body respectively at the rear attachment portions. The hanger body may include a lip with the rear attachment portions disposed along the lip. The rear brake cable segments may be integrated into a single cable and the lip may be configured to engage the rear brake cable segments with the rear brake cable segments being looped about the lip. The hanger body may include a pivot member support and the lip may extend from the pivot member support. In another arrangement, the pivot member support includes first and second plates, and the lip extends between the first and second plates. The pivot member may be rotatably connected to and between the first and second plates. The rear brake cable segments may be rotatably attached to the hanger body respectively at the rear attachment portions. In an embodiment, the pivot member is a cross bar having opposing ends and a central portion. The pivot member is attached to the hanger body at the central portion, and the main attachment portions are respectively disposed adjacent the opposing ends. In another embodiment, the pivot member is a pulley and includes a central portion. The pivot member is attached to the hanger body at the central portion. The dual cable force balancing mechanism may further include a fastener rotatably coupling the pivot member to the hanger body. The main brake cable segments may be integrated into a single cable, and the pivot member is configured to engage the main brake cable segments with the main brake cable segments being looped about the pivot member. The pivot member includes a pivot pin element disposed between the main attachment portions and positionable orthogonal to the longitudinal axis, and the rear brake cable segments are joined at the pivot pin element. In an embodiment, the rear brake cable segments are cooperatively looped over the pin element with the pin element. In another embodiment, the rear brake cable segments are cooperatively wound about the pin element. The rear brake cable segments may take the form of a single spring wire. The pivot member may be rotatably attachable to the main brake cables.
- According to another aspect of the invention, there is provided a bicycle. The bicycle includes a bicycle frame and a rear wheel supported by the bicycle frame. The bicycle further includes a rear brake assembly. The rear brake assembly includes a rear brake lever and a pair of main brake cable segments in mechanical communication with the rear brake lever. The rear brake assembly further includes a pair of rear brake arms in operable communication with the rear wheel. The rear brake assembly further includes a dual cable force balancing mechanism. The dual cable force balancing mechanism includes a brake arm actuation assembly defining a longitudinal axis positioned between the main brake cable segments. The brake arm actuation assembly is attached to the rear brake arms. The dual cable force balancing mechanism further includes a pivot member including main attachment portions disposed about the longitudinal axis. The main cable segments are respectively attached to the pivot member at main attachment portions, the pivot member being rotatably coupled to the brake arm actuation assembly for pivoting the pivot member with respect to the longitudinal axis.
- According to various embodiments, the dual cable force balancing mechanism may include a pair of rear brake cable segments attached to the rear brake arms. Each of the rear brake cable segments is disposed in mechanical communication with the pivot member. The dual cable force balancing mechanism may be as described above. Further, the bicycle frame may include a seat post portion, and the dual cable force balancing mechanism may be disposed between the seat post portion and the rear brake arms.
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FIG. 1 is a perspective view of a bicycle including a dual cable force balancing mechanism in accordance with an aspect of the present invention; -
FIG. 2 is an enlarged exploded perspective view of the dual cable force balancing mechanism ofFIG. 1 as shown with portions of main brake cable segments and portions of rear brake cable segments; -
FIG. 3 is a plan view of the dual cable force balancing mechanism ofFIG. 1 as assembled, as shown with portions of the main brake cable segments, the rear brake cable segments, and rear brake arms; -
FIG. 4 is a plan view similar to the view ofFIG. 3 , however, of a dual cable force balancing mechanism according to another aspect of the present invention; -
FIG. 5 is a plan view similar to the view ofFIG. 3 , however, of a dual cable force balancing mechanism according to another aspect of the present invention; and -
FIG. 6 is a side view of the dual cable force balancing mechanism ofFIG. 5 as seen along axis 6-6 ofFIG. 5 ; -
FIG. 7 is a plan view similar t the view ofFIG. 3 , however, of a dual cable force balancing mechanism according to another aspect of the present invention; -
FIG. 8 is a top view of the dual cable force balancing mechanism ofFIG. 7 as seen along axis 8-8 ofFIG. 5 ; -
FIG. 9 is a plan view similar t the view ofFIG. 3 , however, of a dual cable force balancing mechanism according to another aspect of the present invention; and -
FIG. 10 is a top view of the dual cable force balancing mechanism ofFIG. 9 as seen alongaxis 10 −10 ofFIG. 9 . - Referring now to the drawings wherein the showings are for purposes of illustrating preferred embodiments of the present invention only, and not for purposes of limiting the same,
FIGS. 1-10 illustrate a bicycle with rear brake related elements in accordance with the aspects of the present invention. - Referring now to
FIG. 1 , there is depicted a perspective view of abicycle 10 including a dual cableforce balancing mechanism 12 in accordance with an aspect of the present invention. For ease of illustrating the present invention selected portions of thebicycle 10 are shown in phantom lining. Thebicycle 10 includes abicycle frame 14. Thebicycle frame 14 supports front andrear wheels Handlebars 20 are rotatably coupled to thebicycle frame 14. Afront brake lever 22 is mounted to the handlebars 20. Thefront brake lever 22 is cable connected tofront brake arms front wheel 16. Arear brake lever 28 is further mounted to the handlebars 20. Therear brake lever 28 is cable connected to a pair ofrear brake arms rear wheel 18. - In the embodiment shown, a rear
brake lever cable 34 is attached to therear brake lever 28. Therear brake cable 34 is split into a pair ofsegments 36. As is common with BMX style bicycles, at a base of thehandlebars 20 adjacent thebicycle frame 14 there is provided acable detangler 38. Thecable detangler 38 allows for riders to do various tricks involving spinning of thehandlebars 20 without limitations of the rear brake cabling being twisted about the base of thehandlebars 20 after only a single rotation. Thecable detangler 38 may include a detangler bearing set with inner and outer races. As seen inFIG. 3 , therear brake arms brake pads 62 which are configured to engage therear wheel 18. Squeezing of therear brake lever 28 pulls upon therear brake cable 34 and thesegments 36 that are attached to one of the races of thecable detangler 38. A pair ofmain cable segments cable detangler 38. This configuration is commonly referred to as a dual rear brake cable configuration. The mainbrake cable segments cable detangler 38 rearward along thebicycle frame 14 in mechanical communication with therear brake arms cable detangler 38 allows for transmission of the cable tension initiated by the squeezing of therear brake lever 28 through thecable detangler 38 while freeing thehandlebars 20 to spin in relation to thebicycle frame 14. - Referring now to
FIG. 2 there is depicted an enlarged exploded perspective view of the dual cableforce balancing mechanism 12 ofFIG. 1 as shown with a portion of the mainbrake cable segments brake cable segments rear brake arms bicycle 10. Referring additionally toFIG. 3 there is depicted a plan view of the dual cableforce balancing mechanism 12 ofFIG. 1 as assembled, as shown along with portions of the mainbrake cable segments brake cable segments rear brake arms - An aspect of the present invention can be regarded as the dual cable
force balancing mechanism 12 for use with the pair of mainbrake cable segments rear brake arms bicycle 10. The dual cableforce balancing mechanism 12 includes a brakearm actuation assembly 47 defining alongitudinal axis 50 positionable between the mainbrake cable segments arm actuation assembly 47 is attachable to therear brake arms force balancing mechanism 12 further includes apivot member 56 includingmain attachment portions longitudinal axis 50 for respectively attaching the mainbrake cable segments pivot member 56 is rotatably coupled to the brakearm actuation assembly 47 for pivoting thepivot member 56 with respect to thelongitudinal axis 50. - It is contemplated that dual cable
force balancing mechanism 12 may be used with thebicycle 10 having thecable detangler 38 for allowing thehandlebars 20 of thebicycle 10 to freely rotate. The dual cableforce balancing mechanism 12 may be installed with the mainbrake cable segments cable detangler 38. The present invention recognizes that unequal tension in the mainbrake cable segments 38 is a significant underlying cause of the cable flop phenomenon associated with thecable detangler 38 when thehandlebars 20 are fully rotated. Such unequal tension may be a result of relative unequal lengths of the mainbrake cable segments pivot member 56 allows for the dual cableforce balancing mechanism 12 to “actively” compensate or adjust for unequal lengths of the mainbrake cable segments handlebars 20 of thebicycle 10. The pivot action of thepivot member 56 is indicated inFIG. 3 with the curved double-headed arrows. This pivot action allows each of the twomain brake cables cable detangler 38 to the brakearm actuation assembly 47 to mitigate the cable flop phenomenon. As such, the pivot action allows the dual cableforce balancing mechanism 12 to perform a force balancing in the transfer of tension initiated by the pulling of therear brake lever 28 to actuate therear brake arms - In further detail according to various embodiments, the main
brake cable segments force balancing mechanism 12. The mainbrake cable segments force balancing mechanism 12 with the mainbrake cable segments force balancing mechanism 12 being generally aligned with thelongitudinal axis 50. - The main
brake cable segments pivot member 56 in a variety ways. In this regard, in the embodiment shown, thepivot member 56 takes the form of a cross bar having opposing ends 64, 66 and acentral portion 68. Themain attachment portions fastener 72. Thefittings 70 and thepivot member 56 are cooperatively configured to respectively capture and clamp the mainbrake cable segments main attachment portions fasteners 72 may each be received in fastener engagement holes 74 formed in thepivot member 56. Themain attachment portions groove 76 as shown inFIG. 2 . Eachgroove 76 is formed to respectively accommodate and receive the mainbrake cable segments brake cable segments - Though not shown it is contemplated that the main
brake cable segments brake cable segments brake cable segments pivot element 56 and its pivoting action advantageously compensates for differential relative lengths in the mainbrake cable segments - The brake
arm actuation assembly 47 may include the pair of rearbrake cable segments brake cable segments rear brake arms brake cable segments pivot member 56. The brakearm actuation assembly 47 may further include ahanger body 48. Thehanger body 48 is rotatably coupled to thepivot member 56. The hanger body includesrear attachment portion longitudinal axis 50. The rearbrake cable segments hanger body 48 respectively at therear attachment portions - The
pivot member 56 may be attached to thehanger body 48 at thecentral portion 68. This may be accomplished through any number of ways. For example, as shown afastener 78 is disposed through thepivot member 56 at thecentral portion 68 and is engaged with thehanger body 48. - The
hanger body 48 may include alip 80. Therear attachment portions lip 80. In this regard, therear attachment portions lip 80. Thehanger body 48 may further include apivot member support 82 and thelip 80 may extend from thepivot member support 82. Thehanger body 48, in particular thepivot member support 82, may be integrally formed with thelip 80. The rearbrake cable segments lip 80 may be configured to engage the rearbrake cable segments brake cable segments lip 80. - As shown in
FIG. 3 , the rearbrake cable segments rear brake arms rear brake arms cable end 84 and an opposingbrake pad end 86. The brake pad ends 86 each respectively support thebrake pads 62.Fasteners 88 may be used to clamp down and attach the rearbrake cable segments brake cable segments - According to another aspect of the present invention, there is provided the
bicycle 10 including thebicycle frame 14, therear wheel 18 supported by thebicycle frame 14, and a rear brake assembly including therear brake lever 28, the mainbrake cable segments rear brake arms brake cable segments force balancing mechanism 12. Thebicycle frame 14 may include aseat post portion 90 as shown inFIG. 1 , and the dual cableforce balancing mechanism 12 may be disposed between theseat post portion 90 and therear brake arms force balancing mechanism 12 results in the rearbrake cable segments rear brake arms brake arms force balancing mechanism 12 at other locations of thebicycle 10. - Referring now to
FIG. 4 there is depicted a plan view similar to the view ofFIG. 3 , however of a dual cableforce balancing mechanism 92 according to another aspect of the present invention. The dual cableforce balancing mechanism 92 is similar in configuration to the dual cableforce balancing mechanism 12, however with the differences noted, and like reference numerals indicate like structures. This embodiment contemplates that there is provided rearbrake cable segments 96 that are discrete members. In this regard, the dual cableforce balancing mechanism 92 includes ahanger body 94 that is configured to engage the rearbrake cable segments 96. Thehanger body 94 includesrear attachment portions Fasteners 102 andfittings 104 may be used to respectively clamp the rearbrake cable segments 96 to thehanger body 92 at therear attachment portions brake cable segments 96 may be rotatably coupled to thehanger body 94 as indicated by the double-headed arrows. - Referring now to
FIG. 5 there is depicted a plan view similar to the view ofFIG. 3 , however of a dual cableforce balancing mechanism 106 according to yet another aspect of the present invention.FIG. 6 is a side view of the dual cableforce balancing mechanism 106 ofFIG. 5 as seen along axis 6-6. The dual cableforce balancing mechanism 106 is similar in configuration to dual cableforce balancing mechanism 12, however with the differences noted, and like reference numerals indicate like structures. - Among other things, this embodiment features that the main
brake cable segments 108, 110 are integrated into a single cable. The dual cableforce balancing mechanism 106 includes apivot member 112 rotatably coupled to ahanger body 114. Thepivot member 112 may take the form of a pulley. Thepivot member 112 includes acentral portion 116 and thepivot member 112 is attached to thehanger body 114 at thecentral portion 116. Afastener 118, such as a pin, may be used to couple thepivot member 112 with thehanger body 114. Thepivot member 112 is configured to engage the mainbrake cable segments 108, 110. In this regard, thepivot member 112 may be configured to engage the mainbrake cable segments 108, 110 with the mainbrake cable segments 108, 110 being looped about thepivot member 112. Thepivot member 112 includesmain attachments portions FIG. 6 ). Thehanger body 114 may include a pivot member support including first andsecond plates pivot member 112 is rotatably connected to and between the first andsecond plates lip 130 extends between the first andsecond plates lip 130 may be configured to engage the rearbrake cable segments lip 130 includesrear attachment portions hanger body 114. - Referring now to
FIG. 7 there is depicted a plan view similar to the view ofFIG. 3 , however of a dual cableforce balancing mechanism 136 according to yet another aspect of the present invention.FIG. 8 is a top view of the dual cableforce balancing mechanism 136 ofFIG. 7 as seen along axis 8-8. The dual cableforce balancing mechanism 136 is similar in configuration to dual cableforce balancing mechanism 12, however with the differences noted, and like reference numerals indicate like structures. - Among other things, this embodiment features a
pivot member 138 that may be rotatably coupled to the mainbrake cable segments brake cable segments rotatable fasteners 140 located atmain attachment portions 142, as shown inFIG. 8 . Thepivot member 138 may include apivot pin element 144 disposed between themain attachment portions 142 and positionable orthogonal to thelongitudinal axis 50. In this embodiment, there are provided rearbrake cable segments 146 that are integrally formed and are joined at thepivot pin element 144. The rearbrake cable segments 146 may be formed of a single spring wire. The rearbrake cable segments 146 are cooperatively wound about thepin element 144. In this embodiment, the dual cableforce balancing mechanism 136 includes a brakearm actuation assembly 148 that is simply formed of the rearbrake cable segments 146. In this form, it is contemplated that thepivot member 138 may rotate with respect to the brakearm actuation assembly 148 about thepivot pin element 144. Advantageously, the use of a spring wire may serve a dual purpose of not only transferring force from the mainbrake cable segments rear brake arms rear brake arms - Referring now to
FIG. 9 there is depicted a plan view similar to the view ofFIG. 3 , however of a dual cableforce balancing mechanism 150 according to yet another aspect of the present invention.FIG. 10 is a top view of the dual cableforce balancing mechanism 150 ofFIG. 9 as seen alongaxis 10 −10. The dual cableforce balancing mechanism 150 is similar in configuration to dual cableforce balancing mechanism 150, however with the differences noted, and like reference numerals indicate like structures. - Among other things, this embodiment features a
pivot member 152 that may be coupled to the mainbrake cable segments main attachment portions 154. Thepivot member 152 may include apivot pin element 156 disposed between themain attachment portions 154 and positionable orthogonal to thelongitudinal axis 50. In this embodiment, there are provided rearbrake cable segments 158 that are integrally formed and are joined at thepivot pin element 156. The rearbrake cable segments 146 are cooperatively loop over thepivot pin element 156. In this embodiment, the dual cableforce balancing mechanism 150 includes a brakearm actuation assembly 160 that is simply formed of the rearbrake cable segments 158. In this form, it is contemplated that thepivot member 138 may rotate and be disposed in sliding contact with the brakearm actuation assembly 160 at thepivot pin element 156. - While an illustrative and presently preferred embodiments of the various aspects of the invention have been described in detail herein, it is to be understood that the inventive concepts may be otherwise variously embodied and employed and that the appended claims are intended to be construed to include such variations except insofar as limited by the prior art.
Claims (19)
1. A dual cable force balancing mechanism for use with a pair of main brake cable segments and a pair of rear brake arms of a bicycle, the dual cable force balancing mechanism comprising:
a brake arm actuation assembly defining a longitudinal axis positionable between the main brake cable segments, the brake arm actuation assembly being attachable to the rear brake arms; and
a pivot member including main attachment portions disposed about the longitudinal axis for respectively attaching the main cable segments, the pivot member being rotatably coupled to the brake arm actuation assembly for pivoting the pivot member with respect to the longitudinal axis.
2. The dual cable force balancing mechanism of claim 1 wherein the brake arm actuation assembly includes a pair of rear brake cable segments attachable to the rear brake arms, each of the rear brake cable segments is disposed in mechanical communication with the pivot member.
3. The dual cable force balancing mechanism of claim 2 wherein the brake arm actuation assembly includes a hanger body, the hanger body is rotatably coupled to the pivot member, the hanger body includes rear attachment portions respective positionable about the longitudinal axis, the rear brake cable segments are attached to the hanger body respectively at the rear attachment portions.
4. The dual cable force balancing mechanism of claim 3 wherein the hanger body includes a lip with the rear attachment portions disposed along the lip, the rear brake cable segments are integrated into a single cable and the lip is configured to engage the rear brake cable segments with the rear brake cable segments being looped about the lip.
5. The dual cable force balancing mechanism of claim 4 wherein the hanger body includes a pivot member support and the lip extends from the pivot member support.
6. The dual cable force balancing mechanism of claim 4 wherein the hanger body includes a pivot member support, the pivot member support includes first and second plates, the lip extends between the first and second plates, the pivot member is rotatably connected to and between the first and second plates.
7. The dual cable force balancing mechanism of claim 3 wherein the rear brake cable segments are rotatably attached to the hanger body respectively at the rear attachment portions.
8. The dual cable force balancing mechanism of claim 3 wherein the pivot member is a cross bar having opposing ends and a central portion, the pivot member is attached to the hanger body at the central portion, the main attachment portions are respectively disposed adjacent the opposing ends.
9. The dual cable force balancing mechanism of claim 3 wherein the pivot member is a pulley and includes a central portion, the pivot member is attached to the hanger body at the central portion.
10. The dual cable force balancing mechanism of claim 3 further includes a fastener rotatably coupling the pivot member to the hanger body.
11. The dual cable force balancing mechanism of claim 2 wherein the main brake cable segments are integrated into a single cable, the pivot member is configured to engage the main brake cable segments with the main brake cable segments being looped about the pivot member.
12. The dual cable force balancing mechanism of claim 2 wherein the pivot member includes a pivot pin element disposed between the main attachment portions and positionable orthogonal to the longitudinal axis, the rear brake cable segments are joined at the pivot pin element.
13. The dual cable force balancing mechanism of claim 12 wherein the rear brake cable segments are cooperatively looped over the pin element with the pivot pin element.
14. The dual cable force balancing mechanism of claim 12 wherein the rear brake cable segments are cooperatively wound about the pivot pin element.
15. The dual cable force balancing mechanism of claim 14 wherein the rear brake cable segments are formed of a single spring wire.
16. The dual cable force balancing mechanism of claim 1 wherein the pivot member is rotatably attachable to the main brake cables.
17. A bicycle comprising:
a bicycle frame;
a rear wheel supported by the bicycle frame;
a rear brake assembly including:
a rear brake lever;
a pair of main brake cable segments in mechanical communication with the rear brake lever;
a pair of rear brake arms in operable communication with the rear wheel; and
a dual cable force balancing mechanism including:
a brake arm actuation assembly defining a longitudinal axis positioned between the main brake cable segments, the brake arm actuation assembly being attached to the rear brake arms; and
a pivot member including main attachment portions disposed about the longitudinal axis, the main cable segments being respectively attached to the pivot member at main attachment portions, the pivot member being rotatably coupled to the brake arm actuation assembly for pivoting the pivot member with respect to the longitudinal axis.
18. The bicycle of claim 17 wherein the dual cable force balancing mechanism includes a pair of rear brake cable segments attached to the rear brake arms, each of the rear brake cable segments is disposed in mechanical communication with the pivot member.
19. The bicycle of claim 17 wherein the bicycle frame includes a seat post portion, the dual cable force balancing mechanism is disposed between the seat post portion and the rear brake arms.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/231,169 US20060011423A1 (en) | 2003-10-10 | 2005-09-20 | Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/684,010 US6968927B2 (en) | 2003-10-10 | 2003-10-10 | Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments |
US11/231,169 US20060011423A1 (en) | 2003-10-10 | 2005-09-20 | Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/684,010 Continuation US6968927B2 (en) | 2003-10-10 | 2003-10-10 | Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments |
Publications (1)
Publication Number | Publication Date |
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US20060011423A1 true US20060011423A1 (en) | 2006-01-19 |
Family
ID=34422893
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US10/684,010 Expired - Fee Related US6968927B2 (en) | 2003-10-10 | 2003-10-10 | Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments |
US11/231,169 Abandoned US20060011423A1 (en) | 2003-10-10 | 2005-09-20 | Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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US10/684,010 Expired - Fee Related US6968927B2 (en) | 2003-10-10 | 2003-10-10 | Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments |
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US (2) | US6968927B2 (en) |
Cited By (3)
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US20070196499A1 (en) * | 2001-08-31 | 2007-08-23 | Alkermes. Inc. | Residual Solvent extraction method and microparticles produced thereby |
US20080233199A1 (en) * | 2007-03-22 | 2008-09-25 | Alkermes, Inc. | Coacervation Process |
US20080260847A1 (en) * | 2004-04-15 | 2008-10-23 | Alkermes, Inc. | Polymer-Based Sustained Release Device |
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US6968927B2 (en) * | 2003-10-10 | 2005-11-29 | Brian Scura | Bicycle force balancing mechanism with a brake arm actuation assembly and a pivot member for dual main brake cable segments |
US20060021830A1 (en) * | 2004-07-29 | 2006-02-02 | Lassanske Todd W | Cycling exerciser with single cable actuator for brake and resistance adjustment |
CA2816168C (en) * | 2005-04-04 | 2015-06-30 | Telezygology Inc. | Stud fastener and stabilising device |
US7267205B2 (en) * | 2005-08-31 | 2007-09-11 | Shimano, Inc. | Apparatus for actuating a bicycle hub brake |
AT507482B1 (en) * | 2008-03-21 | 2010-08-15 | Nagel Edmund | TRANSMISSION WITH CHANGES OF CHANGED TRANSLATION BETWEEN AN INPUT SHAFT AND AN INITIAL SHAFT |
US8052581B1 (en) * | 2010-01-05 | 2011-11-08 | Saris Cycling Group, Inc. | Dual actuation mechanism for braking and stopping rotation of a rotating member |
US9908031B2 (en) | 2014-10-03 | 2018-03-06 | Feiyu Ma | Dry land ski |
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Also Published As
Publication number | Publication date |
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US6968927B2 (en) | 2005-11-29 |
US20050077120A1 (en) | 2005-04-14 |
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Legal Events
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