USRE45627E1 - Re-keyable lock cylinder - Google Patents
Re-keyable lock cylinder Download PDFInfo
- Publication number
- USRE45627E1 USRE45627E1 US12/044,434 US4443408A USRE45627E US RE45627 E1 USRE45627 E1 US RE45627E1 US 4443408 A US4443408 A US 4443408A US RE45627 E USRE45627 E US RE45627E
- Authority
- US
- United States
- Prior art keywords
- pin members
- plug
- key
- pin
- guide bar
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000010168 coupling process Methods 0.000 claims abstract description 19
- 238000005859 coupling reaction Methods 0.000 claims abstract description 19
- 230000008878 coupling Effects 0.000 claims abstract description 14
- 238000013519 translation Methods 0.000 claims description 7
- 238000012423 maintenance Methods 0.000 claims 1
- 230000013011 mating Effects 0.000 abstract description 12
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 210000005069 ears Anatomy 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
- E05B27/02—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in operated by the edge of the key
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B29/00—Cylinder locks and other locks with plate tumblers which are set by pushing the key in
- E05B29/004—Cylinder locks and other locks with plate tumblers which are set by pushing the key in with changeable combinations
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B29/00—Cylinder locks and other locks with plate tumblers which are set by pushing the key in
- E05B29/0066—Side bar locking
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B29/00—Cylinder locks and other locks with plate tumblers which are set by pushing the key in
- E05B29/0073—Cylinder locks and other locks with plate tumblers which are set by pushing the key in wherein the key can be inserted or withdrawn in different positions or directions
-
- 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
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7441—Key
- Y10T70/7486—Single key
- Y10T70/7508—Tumbler type
- Y10T70/7559—Cylinder type
- Y10T70/7588—Rotary plug
- Y10T70/7593—Sliding tumblers
- Y10T70/7599—Transverse of plug
-
- 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
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7441—Key
- Y10T70/7486—Single key
- Y10T70/7508—Tumbler type
- Y10T70/7559—Cylinder type
- Y10T70/7588—Rotary plug
- Y10T70/7593—Sliding tumblers
- Y10T70/7599—Transverse of plug
- Y10T70/7605—Pin tumblers
-
- 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
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7441—Key
- Y10T70/7486—Single key
- Y10T70/7508—Tumbler type
- Y10T70/7559—Cylinder type
- Y10T70/7588—Rotary plug
- Y10T70/7593—Sliding tumblers
- Y10T70/7599—Transverse of plug
- Y10T70/7616—Including sidebar
-
- 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
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7441—Key
- Y10T70/7729—Permutation
- Y10T70/7734—Automatically key set combinations
-
- 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
- Y10T70/00—Locks
- Y10T70/70—Operating mechanism
- Y10T70/7441—Key
- Y10T70/7729—Permutation
- Y10T70/774—Adjustable tumblers
Definitions
- the present invention generally relates to lock cylinders and more particularly to lock cylinders that can be re-keyed without the use of a master key.
- the present teachings provide a lock with a lock cylinder body and a plug assembly.
- the lock cylinder body has a wall member that defines an interior cavity and a first groove that is generally parallel to a longitudinal axis of the interior cavity.
- the plug assembly is at least partially received in the lock cylinder body and includes a plug, a lock bar, a guide bar, a plurality of first pin members and a plurality of second pin members.
- the plug has a central cavity, a keyway that is generally aligned to a longitudinal axis of the central cavity, a lock bar slot that intersects the central cavity, and a guide bar slot that intersects the central cavity and which is located opposite the lock bar slot.
- the lock bar is movable along a first axis between a first position and a second position. At least a portion of the lock bar extends outwardly of the plug into the first groove when the lock bar is in the first position.
- the lock bar includes at least one lock element that travels from the lock bar slot into the central cavity when the lock bar is moved from the first position to the second position.
- the guide bar is received in the guide bar slot and is movable relative to the plug between a radially inward position and a radially outward position.
- the first pin members are disposed in the central cavity and bound an upper side of the keyway. The first pin members are individually movable in a first direction that is generally transverse to the first axis.
- the first pin members also coupled to the guide bar so as to be collectively movable with the guide bar when the guide bar is moved into the radially outward position.
- Each of the second pin members is received in the central cavity, includes a mating lock element and is coupled to a respective one of the first pin members when the guide bar is in the radially inward position.
- Each of the second pin members is uncoupled from the respective one of the second pin members when the guide bar is in the radially outward position.
- Insertion of a mating key into the keyway causes the first and second pin members to translate in a direction that is generally transverse to the first axis such that the mating lock elements are aligned to the at least one lock element on the lock bar so that the lock bar may translated to the second position to permit the plug assembly to be rotated relative to the lock cylinder body.
- the mating key may be removed from the plug assembly when the guide bar is positioned in the radially outward position
- the teachings of the present invention provide a method for re-keying a lockset that includes: providing a lockset having a lock cylinder body and a plug assembly, the plug assembly including a plurality of first pin members and a plurality of second pin members, each of the first pin members being coupled to an associated one of the second pin members to inhibit relative translation therebetween along a first axis; positioning the second pin members in a predetermined orientation; uncoupling the first pin members from the second pin members to permit relative translation therebetween along the first axis; inserting a key with a desired key profile to the plug assembly, the desired key profile being operable for repositioning at least one of the first pin members relative to a respective one the second pin members along the first axis; and re-coupling each of the first pin members to the associated one of the second pin members to thereby inhibit relative translation therebetween along the first axis.
- FIG. 1 is an exploded perspective view of a lock cylinder constructed in accordance with the teachings of the present invention
- FIG. 2 is a perspective view of a portion of the lock cylinder of FIG. 1 illustrating the lock cylinder body in greater detail;
- FIG. 3 is another perspective view of the lock cylinder body
- FIG. 4 is a perspective view of a portion of the lock cylinder of FIG. 1 illustrating the plug in greater detail;
- FIG. 5 is another perspective view of the plug
- FIG. 6 is a perspective view of a portion of the lock cylinder of FIG. 1 illustrating the bottom pin in greater detail;
- FIG. 7 is a sectional view taken through the lock cylinder of FIG. 1 ;
- FIG. 8 is a perspective view of a portion of the lock cylinder of FIG. 1 illustrating a portion of the guide bar in greater detail;
- FIG. 9 is a perspective view of a portion of the lock cylinder of FIG. 1 illustrating the cover in greater detail;
- FIG. 10 is another perspective view of the cover
- FIG. 11 is a perspective view of a portion of the lock cylinder of FIG. 1 illustrating the rack in greater detail;
- FIG. 12 is a perspective view of a portion of the lock cylinder of FIG. 1 illustrating the lock bar in greater detail;
- FIG. 13 is a sectional view similar to that of FIG. 7 , but illustrating a matched key inserted to the keyway;
- FIG. 14 is a longitudinal section view of the lock cylinder of FIG. 1 illustrating the matched key inserted to the keyway;
- FIG. 15 is a perspective view of a portion of the lock cylinder of FIG. 1 illustrating the matched key inserted into the plug assembly;
- FIG. 16 is an perspective view illustrating the lock cylinder of FIG. 1 in association with a re-keying tool
- FIG. 17 is a longitudinal section view of the lock cylinder of FIG. 1 illustrating the guide bar shifted relative to the lock cylinder body;
- FIG. 18 is a sectional view similar to FIG. 13 , but illustrating the guide bar shifted relative to the lock cylinder body;
- FIG. 19 is a sectional view similar to FIG. 18 , but illustrating the lock cylinder without the original matched key;
- FIG. 20 is a sectional view similar to FIG. 19 , but illustrating a “new” key installed to the keyway;
- FIG. 21 is a longitudinal section view similar to FIG. 17 , but illustrating the guide bar in a returned position relative to the lock cylinder body;
- FIG. 22 is a sectional view similar to FIG, 20 , but illustrating the plug assembly in a re-keyed state
- FIG. 23 is a schematic illustration in flow chart form of a methodology performed in accordance with the teachings of the present invention.
- a lock cylinder constructed in accordance with the teachings of the present invention is generally indicated by reference numeral 10 .
- the lock cylinder 10 is disposed about a longitudinal axis 12 and may include a lock cylinder body 14 , a plug assembly 16 and a “matched” key 18 .
- the lock cylinder body 14 may include a generally cylindrical body portion 30 with a wall member 32 that defines an interior cavity 34 .
- First and second grooves 36 and 38 are formed in the interior surface 40 of the wall member 32 .
- Arcuate cam surfaces 44 may be formed on one or both of the opposite sides of the first and/or second grooves 36 , 38 .
- the cylindrical body portion 30 may include a bridge member 48 that may intersect the second groove 38 .
- the bridge member 48 has a radially inward surface that extends further into the interior cavity 34 than the deepest part of the second groove 38 .
- the plug assembly 16 may include a plug 50 , a plurality of bottom pins 52 , a guide bar 54 , a first guide bar spring 56 , a second guide bar spring 58 , a cover 60 , a plurality of racks 62 , a plurality of pin springs 64 , a spring cap 68 , a locking bar 70 , a lock bar spring 72 , one or more drill-resistant elements, such as ball bearings 74 , and a retainer 76 .
- the plug 50 may include a plug body 90 and a plug face 92 .
- the plug body 90 may be sized to be received through the interior cavity 34 of the lock cylinder body 14 and may include a central cavity 94 that may include one or more first rack slots 96 for receiving a portion of the racks 62 .
- the first rack slots 96 may extend generally transverse to a longitudinal axis 98 of the plug body 90 .
- a lock bar slot 100 may extend longitudinally along the plug body 90 and may intersect the first rack slots 96 .
- a guide bar slot 102 may extend longitudinally along the plug body 90 and may intersect the central cavity 94 .
- the lock bar slot 100 and the guide bar slot 102 may be generally diametrically opposed from one another.
- Retainer slots 106 may be formed in the plug body 90 for receiving the retainer 76 .
- the retainer 76 is a conventional C-shaped spring clip that is received into the retainer slots 106 and which engages the portion of the plug body 90 that extends through the lock cylinder body 14 to thereby inhibit withdrawal of the plug body 90 from the lock cylinder body 14 .
- the plug 50 and the lock cylinder body 14 may be rotatably coupled to one another in any appropriate manner.
- a keyway 110 extends through the plug face 92 and into the central cavity 94 .
- the plug face 92 may include a re-keying tool opening 112 , which may be offset somewhat from the guide bar slot 102 .
- Cavities 114 may be formed in the plug face 92 and/or the plug body 90 for receiving the drill resistant elements. In the particular example provided, the cavities 114 are formed in both the plug face 92 and the plug body 90 and are positioned such that the drill resistant ball bearings 74 are located axially in-line with the lock bar slot 100 and the guide bar slot 102 .
- each bottom pin 52 may include a key-engaging portion 120 , a first securing portion 122 and a coupling portion 124 .
- the key-engaging portion 120 may include an upper surface 130 and a contact member 132 .
- the contact member 132 provides the lockset 10 with improved resistance to the wear that is normally encountered through the insertion of the key to and withdrawal of the key from the keyway 110 .
- the contact member 132 may be unitarily formed with the remainder of the bottom pin 52 , or may comprise one or more discrete elements that are associated with the remainder of the bottom pin 52 .
- the contact member 132 is a conventional hardened ball bearing and is disposed in a slotted aperture 134 that is formed in the remainder of the bottom pin 52 .
- the first securing portion 122 is configured to slide against and engage an associated one of the racks 62 .
- the teeth 140 are illustrated as being generally V-shaped and aligned along an axis that is generally parallel to the longitudinal axis of the bottom pin 52 , but those skilled in the art will appreciate from this disclosure that the tooth or teeth 140 may be formed and/or oriented differently from that which is shown and described.
- the coupling portion 124 may be coupled to the key-engaging portion 120 on a side opposite the first securing portion 122 and is configured to couple the bottom pin 52 to the guide bar 54 .
- the coupling portion 124 is generally L-shaped, having an arm 146 , which may be generally parallel to the longitudinal axis of the bottom pin 52 , and a leg 148 that may be generally perpendicular to the arm 146 .
- the leg 148 is spaced apart from the key-engaging portion 120 so as to form a guide receiving aperture 150 .
- the guide bar 54 may be a longitudinally extending member that may be disposed between the cover 60 and the plug body 90 and may be slidable relative to the plug body 90 in a first direction, which is generally parallel to the longitudinal axis of the plug body 90 , and a second direction, which is generally perpendicular to the longitudinal axis of the plug body 90 .
- the guide bar 54 may include one or more coupling apertures 160 , a setting cam 162 , and a setting tab 164 .
- Each coupling aperture 160 may be formed through the guide bar 54 so as to form a wall member 168 that is sized to engage the coupling portion 124 of an associated one or ones of the bottom pins 52 .
- the guide bar 54 includes five coupling apertures 160 , one for each of the bottom pins 52 . More specifically, in the particular example provided the guide bar 54 is received into the guide receiving aperture 150 in the coupling portion 124 of each bottom pin 52 such that the leg 148 is disposed in an associated one of the coupling apertures 160 to thereby “lock” the guide bar 54 to the bottom pins 52 in a lateral direction.
- the coupling apertures 160 may be sized relatively wider than the bottom pins 52 so as to permit translation of the guide bar 54 relative to the bottom pins 52 in a direction generally parallel to the longitudinal axis 98 of the plug body 90 .
- one or more of the coupling apertures 160 may be sized in the alternative to receive a plurality of the bottom pins 52 .
- the setting cam 162 may extend from a lateral side of the guide bar 54 opposite the coupling apertures 160 and may be configured to cooperate with one or more other elements, such as the lock cylinder body 14 , to permit the setting cam 162 to engage and/or disengage the bottom pins 52 to the racks 62 .
- alignment of the setting cam 162 to the radially inward surface of the bridge member 48 ( FIG. 3 ) maintains engagement between the bottom pins 52 and the racks 62
- alignment of the setting cam 162 to the second groove 38 permits the guide bar 54 to be shifted radially outwardly so that the bottom pins 52 disengage the racks 62 .
- the setting tab 164 provides a location on the guide bar 54 at which a user may apply a force to shift the guide bar 54 relative to the lock cylinder body 14 .
- the setting tab 164 may be offset somewhat from the setting cam 162 so that the setting cam 162 may be positioned behind a drill resistant ball bearing 74 .
- the setting tab 164 is generally L-shaped and extends above the setting cam 162 so as to be aligned with the re-keying tool opening 112 .
- the first guide bar spring 56 biases the guide bar 54 toward the plug face 92 in the first direction (i.e., in a direction generally parallel to the longitudinal axis 98 of the plug body 90 ), while the second guide bar spring 58 biases the guide bar 54 in the second direction (i.e., in a direction outwardly from the plug body 90 away from the racks 62 ).
- the first guide bar spring 56 is a compression spring that is disposed in a spring aperture 190 that is formed in the plug body 90
- the second guide bar spring 58 includes a pair of leaf springs 58 a, each of which being disposed in a spring slot 194 that is formed in the plug body 90 and which intersects the guide bar slot 102 .
- the cover 60 may include a plurality of pin slots 200 , a plurality of second rack slots 202 , and a plurality of guide tabs 204 .
- the cover 60 may also include a longitudinally extending aperture 206 that may form a portion of the keyway 110 .
- the pin slots 200 may have a first portion 210 , which may be generally transverse to the longitudinal axis and vertically in-line with the keyway 110 , and a second portion 212 .
- the second portion 212 of each the pin slot 200 is generally normal to an associated first portion 210 of the pin slot 200 and extends sufficiently through the cover 60 as to intersect an associated one of the second rack slots 202 .
- each pin slot 200 is sized to receive therein an associated one of the pin springs 64
- the second portion 212 is sized to receive an associated one of the bottom pins 52
- the pin springs 64 are configured to bias the bottom pins 52 downwardly in the pin slots 200 .
- each pin spring 64 is a compression spring that is disposed between the spring cap 68 and the upper surface 130 of the key-engaging portion 120 of the bottom pin 52 .
- Each of the second rack slots 202 may be generally parallel to the first portion 210 of an associated one of pin slots 200 .
- the first and second rack slots 96 and 202 cooperate to define a cavity into which an associated one of the racks 62 may be received.
- each guide tabs 204 may extend from the opposite ends of the cover 60 and may be employed to secure the cover 60 to the plug body 90 .
- each guide tabs 204 includes a longitudinally extending tab member 220 that may be received into an associated tab member cavity 222 ( FIG. 5 ) in the plug body 90 .
- An aperture may be formed through each tab member 226 to receive therethrough a rivet, pin or threaded fastener to secure the tab member 220 to the plug body 90 .
- the rearward guide tab 204 also includes a cross-tab 228 , which may be disposed generally perpendicular to the tab member 220 and which may be sized to engage an associated cross-tab cavity 230 ( FIG. 5 ) formed in the plug body 90 .
- each rack 62 may be an elongated member that is slidingly disposed in an associated pair of the first and second rack slots 96 and 202 ( FIG. 9 ).
- Each rack may have a second securing portion 240 and a mating lock element 242 .
- the second securing portion 240 is configured to cooperate with the first securing portion 122 of an associated one of the bottom pins 52 so that when the first and second securing portions 122 and 240 are engaged to one another, the key-engaging portion 120 of the bottom pin 52 may be maintained at a desired position relative to the rack 62 .
- the rack 62 includes a plurality of rack teeth 248 that are spaced apart along a portion of the length of the rack 62 and that have a tooth geometry that is compatible with the tooth geometry of the teeth 140 of the first securing portion 122 on the bottom pins 52 .
- the upper end 250 of the rack 62 may be contoured so as not to contact the interior surface 40 of the lock cylinder body 14 during the operation of the lock cylinder 10 .
- the mating lock element 242 is formed in a surface 254 of the rack 62 that abuts the locking bar 70 .
- the mating lock element 242 is an aperture in the abutting surface 254 having the shape a cylindrical segment that passes through the rack 62 in a direction that is generally perpendicular to the longitudinal axis of the rack 62 .
- the spring cap 68 which is optional, provides a wear-resistant barrier between the pin springs 64 and the wall member 32 of the lock cylinder body 14 . Accordingly, the spring cap 68 may comprise one or more elements that are interposed between the pin springs 64 and the wall member 32 and retain the pin springs 64 within the first portion 210 of the pin slots 200 that are formed in the cover 60 .
- the spring cap 68 may be coupled to the cover 60 via fasteners, such as rivets or threaded fasteners, or utilize a geometrical shape (e.g., a pair of longitudinally extending grooves into which the opposite lateral edges of the spring cap 68 are received) that permits the spring cap 68 to be received into and locked to the cover 60 .
- the spring cap 68 is unitarily formed and is sized to cover the first portion 210 of each pin slots 200 in the cover 60 .
- rivets, pins and/or threaded fasteners may be employed to couple the opposite ends of the spring cap 68 to the cover 60 and the plug body 90 (i.e., the rivets, pins and/or threaded fasteners may be employed to secure both the spring cap 68 and the cover 60 to the plug body 90 ).
- the locking bar 70 is an elongate member that is sized to be at least partially received into the lock bar slot 100 .
- the locking bar 70 may include a cam follower 300 and one or more lock elements 302 .
- the cam follower 300 extends the length of the locking bar 70 and is arcuate in shape.
- the lock element 302 is sized to be slidably received into the mating lock elements 242 that are formed in the racks 62 and may be somewhat shorter than the locking bar 70 so that the cam follower 300 forms a pair of ears 306 , with each ear 306 being located adjacent an opposite end of the lock element 302 .
- the lock bar spring 72 may be disposed between the locking bar 70 and the plug body 90 to bias the locking bar 70 outwardly from the racks 62 toward the interior surface 40 of the wall member 32 of the lock cylinder body 14 .
- the lock bar spring 72 comprises a pair of compression springs, each of which being disposed in a recess 310 that is formed on an inside surface 312 of an associated one of the ears 306 .
- the pin springs 64 bias the bottom pins 52 downwardly in the keyway 110
- the lock bar spring 72 biases the locking bar 70 radially outwardly from the plug body 90 into the first groove 36 in the wall member 32 of the lock cylinder body 14 .
- the key 18 that is associated with the lock cylinder 10 has a lateral cross-sectional shape that matches or is compatible with that of the keyway 110 and a key profile 18 a. Insertion of the key 18 into the keyway 110 brings the key profile 18 a into contact with the contact member 132 of each bottom pin 52 , causing the bottom pins 52 and the racks 62 (since each of the bottom pins 52 is engaged to an associated one of the racks 62 ) to move “upwardly” in the example provided.
- each of the racks 62 will be moved relative to the plug body 90 such that the mating lock elements 242 are aligned to the lock element(s) 302 on the locking bar 70 .
- Rotation of the key 18 which causes rotation of the plug assembly 16 relative to the lock cylinder body 14 , causes the cam follower 300 of the locking bar 70 to ride against the cam surface 44 on the first groove 36 so that the locking bar 70 is pushed radially inwardly toward the plug body 90 .
- the lock element 302 will at least partially engage the mating lock element 242 so that the cam follower 300 may move inwardly by a sufficient amount so as to permit the plug body 90 to rotate in an unimpeded manner within the interior cavity 34 of the lock cylinder body 14 . If the key 18 were not matched to the lock cylinder 10 , the lock element 302 would move inwardly in response to rotation of the plug assembly 16 relative to the lock cylinder body 14 and would contact the abutting surface 254 of at least one of the racks 62 . Such contact would effectively inhibit inward movement of the cam follower 300 so that the locking bar 70 would remain in the first groove 36 and thereby inhibit further rotation of the plug assembly 16 relative to the lock cylinder body 14 .
- a key 18 that is matched to the lock cylinder 10 may be inserted into the keyway 110 and the plug assembly 16 rotated relative to the lock cylinder body 14 through a predetermined angle, such as 45°, to align the guide bar 54 to the second groove 38 in the lock cylinder body 14 .
- a predetermined angle such as 45°
- a re-keying tool 400 is inserted into the re-keying tool opening 112 and is employed to exert a force onto the setting tab 164 ( FIG. 8 ) that pushes the guide bar 54 in the guide bar slot 102 ( FIG. 5 ) away from the re-keying tool opening 112 so that the setting cam 162 rides across the bridge member 48 .
- the second guide bar spring 58 urges the guide bar 54 in an outward direction.
- the key 18 may be removed as shown in FIG. 19 and another, differently configured key 18 ′ may be inserted into the keyway 110 , as shown in FIG. 20 , which causes the bottom pins 52 to move “upwardly” in the keyway 110 in an amount that corresponds to the configuration of the key 18 ′.
- Force on the re-keying tool 400 FIG. 16
- the first guide bar spring 56 FIG. 17
- the guide bar 54 moves toward the re-keying tool opening 112 ( FIG. 16 ).
- the setting cam 162 rides up onto the bridge member 48 , which forces the guide bar 54 inwardly. Since the bottom pins 52 are coupled to the guide bar 54 for movement in a direction generally perpendicular to the longitudinal axis 12 of the lock cylinder 10 , movement of the guide bar 54 in an inward direction causes the first securing portion 122 of the bottom pins 52 to engage the second securing portion 240 of the racks 62 as shown in FIG. 22 . The engagement of the bottom pins 52 to the racks 62 while the locking bar 70 is engaged to the racks 62 “matches” the new key 18 ′ to the lock cylinder 10 .
- a method for re-keying a lock in accordance with the teachings of the present invention is illustrated schematically in flow chart form.
- the methodology includes the steps of: inserting a “matched” key 18 to the plug assembly 16 ; rotating the plug assembly 16 relative to the lock cylinder body 14 through a predetermined angle of rotation; disconnecting the bottom pins 52 from the racks 62 ; removing the key 18 from the plug assembly 16 ; inserting a new key 18 ′ to the plug assembly 16 ; re-coupling the bottom pins 52 to the racks 62 ; and removing the new key 18 ′.
Abstract
Description
Claims (19)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/044,434 USRE45627E1 (en) | 2004-04-01 | 2008-03-07 | Re-keyable lock cylinder |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/815,289 US7007528B2 (en) | 2004-04-01 | 2004-04-01 | Re-keyable lock cylinder |
US12/044,434 USRE45627E1 (en) | 2004-04-01 | 2008-03-07 | Re-keyable lock cylinder |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/815,289 Reissue US7007528B2 (en) | 2004-04-01 | 2004-04-01 | Re-keyable lock cylinder |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE45627E1 true USRE45627E1 (en) | 2015-07-28 |
Family
ID=35052741
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/815,289 Ceased US7007528B2 (en) | 2004-04-01 | 2004-04-01 | Re-keyable lock cylinder |
US12/044,434 Expired - Lifetime USRE45627E1 (en) | 2004-04-01 | 2008-03-07 | Re-keyable lock cylinder |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/815,289 Ceased US7007528B2 (en) | 2004-04-01 | 2004-04-01 | Re-keyable lock cylinder |
Country Status (17)
Country | Link |
---|---|
US (2) | US7007528B2 (en) |
JP (1) | JP4794549B2 (en) |
KR (1) | KR101152550B1 (en) |
CN (1) | CN1957153B (en) |
AR (1) | AR048591A1 (en) |
AU (1) | AU2005230853B2 (en) |
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AR048591A1 (en) | 2006-05-10 |
JP2007531835A (en) | 2007-11-08 |
CA2559868C (en) | 2012-10-09 |
JP4794549B2 (en) | 2011-10-19 |
PE20051077A1 (en) | 2005-12-18 |
DOP2005000048A (en) | 2005-12-15 |
BRPI0508898B1 (en) | 2016-07-12 |
MY142695A (en) | 2010-12-31 |
KR101152550B1 (en) | 2012-06-01 |
CN1957153A (en) | 2007-05-02 |
GT200500006U (en) | 2007-02-14 |
BRPI0508898A (en) | 2007-09-11 |
TWI343960B (en) | 2011-06-21 |
AU2005230853B2 (en) | 2011-02-03 |
CN1957153B (en) | 2011-06-15 |
TW200538614A (en) | 2005-12-01 |
SV2005002072A (en) | 2005-12-06 |
CA2559868A1 (en) | 2005-10-20 |
US20050217330A1 (en) | 2005-10-06 |
WO2005098175A1 (en) | 2005-10-20 |
UY28836A1 (en) | 2005-10-31 |
KR20070037571A (en) | 2007-04-05 |
GT200500396A (en) | 2007-02-14 |
PA8628501A1 (en) | 2005-11-25 |
AU2005230853A1 (en) | 2005-10-20 |
US7007528B2 (en) | 2006-03-07 |
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