US3777517A - Saw and impact resistant lock shackle - Google Patents

Saw and impact resistant lock shackle Download PDF

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Publication number
US3777517A
US3777517A US00260397A US3777517DA US3777517A US 3777517 A US3777517 A US 3777517A US 00260397 A US00260397 A US 00260397A US 3777517D A US3777517D A US 3777517DA US 3777517 A US3777517 A US 3777517A
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core
shackle
sheath
construction
grooves
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US00260397A
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W Shwayder
B Sear
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WARREN M SHWAYDER US
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B67/00—Padlocks; Details thereof
    • E05B67/06—Shackles; Arrangement of the shackle
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
    • E05B15/16—Use of special materials for parts of locks
    • E05B15/1614—Use of special materials for parts of locks of hard materials, to prevent drilling
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/923—Physical dimension
    • Y10S428/924—Composite
    • Y10S428/926—Thickness of individual layer specified
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component
    • Y10T428/12069—Plural nonparticulate metal components
    • Y10T428/12076—Next to each other
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component
    • Y10T428/12097—Nonparticulate component encloses particles
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component
    • Y10T428/12104—Particles discontinuous
    • Y10T428/12111—Separated by nonmetal matrix or binder [e.g., welding electrode, etc.]
    • Y10T428/12125—Nonparticulate component has Fe-base
    • 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
    • Y10T70/40—Portable
    • Y10T70/413—Padlocks
    • Y10T70/487—Parts, accessories, attachments and adjuncts
    • Y10T70/491—Shackles
    • 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
    • Y10T70/7915—Tampering prevention or attack defeating
    • Y10T70/7921—Armoring

Definitions

  • ABSTRACT A lock shackle formed of an elongated metal core having longitudinally extending shallow grooves formed in its surface, and a thin wall tube closely fitted around the core, with the grooves filled with a matrix formed of hard carbide particles and a soft material binder.
  • Padlock shackles are generally made of steel rods bent into the U-shape of a shackle and heat treated for hardness. These conventionally used shackles have only a limited resistance to saw cutting and virtually no resistance to cutting by carbide coated saws such as rod saws. In addition, they are relatively easily broken by the impact of a heavy hammer. Moreover, they can be relatively easily stretched or elongated by insertion of chisels or wedges between a shackle loop and padlock casing, so that they can be pulled out of the locked position. Thus, conventional padlocks, and particularly their shackles, provide no protection against a determined and sustained effort to break them. Thus, the invention herein relates to an improved shackle which is highly resistant to saw cutting, impact application and stretching.
  • the improved shackle herein comprises a conventional appearing, U-shaped, rod-like member, but formed of an elongated, inner core which is generally spline shaped in cross-section to provide longitudinally extending, shallow grooves in its surface, with a tubular sleeve closely fitted around the outside of the core, and
  • the core and sleeve are made of a work hardenable steel.
  • the assembly of core, matrix and sleeve is swaged to work harden the metal, elongate and form the finished diameter of the part, as well as to seal the elements together.
  • FIG. 1 is a schematic view of a padlock showing the improved shackle herein.
  • FIG. 2 is an enlarged cross-sectional view of the shackle taken in the direction of arrows 2-2 of FIG. 1.
  • FIG. 3 is an elevational view of the core, per se.
  • FIG. 4 shows the initial assembly of the sleeve upon the core
  • FIG. 5 shows the step of applying the binder material into the grooves which have already been filled with hard particles.
  • FIG. 6 is a partially cross-sectioned view of the assembled rod-like member.
  • FIG. 7 is an elevational view, partially in crosssection, of the finished shackle.
  • FIG. 8 is a fragmentary, enlarged cross-sectional view of a portion of the shackle.
  • FIG. 1 illustrates a conventional padlock 10 having a shackle 11 which fits into and locks within the padlock casing or body 12.
  • the construction and locking parts of the casing are omitted since these form no part of the invention herein.
  • a locking bar 13, which is arranged within and forms part of the locking mechanism, is schematically illustrated. This bar engages notches I4 and 15 formed in the shackle to lock the shackle into the padlock casing. It should be under stood that the shackle of this invention may be used with any form of padlock casing, regardless of the type of locking mechanism included therein.
  • the shackle is formed of a central core 16 which preferably is roughly spline-shaped in cross-section and of uniform diameter.
  • the core lower end 17 may be flared or tapered.
  • the core is thus provided with a number of longitudinally extending shallow grooves 18 defined by the tooth-like formation of the spline.
  • a method of forming the improved shackle herein is as follows: First, the core 16 is formed with the longitudinally extending shallow grooves and the flared end 17 (see FIG. 3). Next, the thin walled tubular sheath is forced into position around the core, as illustrated in FIG. 4. Then, the hard'particles are poured into the grooves, with the rod arranged upright as shown in FIG. 5, to form a packing of particles within the grooves. The space at the upper end 21 of the tube 19 may then be filled with pellets or beads or powder of the brazing compound, such as copper brazing pellets 25, and while the rod is held upright, it is heated to melt the braze which flows downwardly, filling the spaces be tween the particles.
  • the brazing compound such as copper brazing pellets 25
  • braze material above the upper end of the core.
  • a slug 26 of braze fills the upper end of the sheath (see FIG. 6).
  • the composite rod is swaged to reduce its diameter to required size, while simultaneously elongating it and more importantly, work hardening the metal forming the sleeve and the core.
  • Both of these metals are selected from the work hardenable steels, with the tube preferably being of a stainless steel material to provide a greater toughness, corrosion resistance, improved appearance, etc.
  • the rod may be bent into the U-shaped shackle form illustrated in FIG. 7 and the notches l4 and formed therein.
  • the notch 14 may be easily cut into the shackle since it is arranged in the area of the end of the core where there is no matrix material.
  • the notch 15, located in an area where there is matrix material may be formed either by a suitable deformation process or electrical or heat cutting method.
  • the area into which the notch 15 is formed may be made without the groove and matrix so as to permit easy notching.
  • the slug 26 simply functions as a filler, as a place where openings may be easily drilled through for various types of locking mechanisms, and also as a heat conductor to remove heat which may be applied to the shackle.
  • rod-like construction and method are described in connection with shackles for padlocks, it may likewise be used in other applications where similar types of penetration resistance, impact resistance and stretching resistance is desired, such as for example, protective bars, jail bars, locking bars, etc.
  • cross-sectional shape may be varied as may the shape of the grooves or passageways or spaces which are arranged between the core and the sheath.
  • said member being formed of an elongated metal core surrounded by a closely fitting, thin metal sheath, with longitudinally extending shallow passageways formed between the core and the sheath;
  • passageways being filled with a matrix formed of closely packed particles of a hard material, such as a metal carbide, and a binder material.

Abstract

A lock shackle formed of an elongated metal core having longitudinally extending shallow grooves formed in its surface, and a thin wall tube closely fitted around the core, with the grooves filled with a matrix formed of hard carbide particles and a soft material binder.

Description

United States Patent 1 Shwayder et a1.
[ Dec. 11, 1973 SAW AND IMPACT RESISTANT LOCK SHACKLE [75] Inventors: Warren M. Shwayder; Baruch Sear,
both of Birmingham, Michv [73] Assignee: Warren M. Shwayder, Bloomfield 3,447,230 6/1969 Bargainnier 29/420.5
Reich 29/420.5 Miller 70/38 A l/197l l/1973 Primary Examiner-Robert L. Wolfe Attorney-Bernard J. Cantor [57] ABSTRACT A lock shackle formed of an elongated metal core having longitudinally extending shallow grooves formed in its surface, and a thin wall tube closely fitted around the core, with the grooves filled with a matrix formed of hard carbide particles and a soft material binder.
4 Claims, 8 Drawing Figures I SAW AND IMPACT RESISTANT LOCK SHACKLE BACKGROUND OF INVENTION Padlock shackles are generally made of steel rods bent into the U-shape of a shackle and heat treated for hardness. These conventionally used shackles have only a limited resistance to saw cutting and virtually no resistance to cutting by carbide coated saws such as rod saws. In addition, they are relatively easily broken by the impact of a heavy hammer. Moreover, they can be relatively easily stretched or elongated by insertion of chisels or wedges between a shackle loop and padlock casing, so that they can be pulled out of the locked position. Thus, conventional padlocks, and particularly their shackles, provide no protection against a determined and sustained effort to break them. Thus, the invention herein relates to an improved shackle which is highly resistant to saw cutting, impact application and stretching.
SUMMARY OF INVENTION The improved shackle herein comprises a conventional appearing, U-shaped, rod-like member, but formed of an elongated, inner core which is generally spline shaped in cross-section to provide longitudinally extending, shallow grooves in its surface, with a tubular sleeve closely fitted around the outside of the core, and
. with the grooves filled with a matrix of hard particles,
such as tungsten carbide or the like, in a soft metal .binder. The core and sleeve are made of a work hardenable steel. The assembly of core, matrix and sleeve is swaged to work harden the metal, elongate and form the finished diameter of the part, as well as to seal the elements together.
The finished rod-like shackle cannot be sawed through or broken by impact using any conventional means, including the extremely hard type carbide DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view of a padlock showing the improved shackle herein.
FIG. 2 is an enlarged cross-sectional view of the shackle taken in the direction of arrows 2-2 of FIG. 1.
FIG. 3 is an elevational view of the core, per se.
FIG. 4 shows the initial assembly of the sleeve upon the core, and
FIG. 5 shows the step of applying the binder material into the grooves which have already been filled with hard particles.
FIG. 6 is a partially cross-sectioned view of the assembled rod-like member.
FIG. 7 is an elevational view, partially in crosssection, of the finished shackle.
FIG. 8 is a fragmentary, enlarged cross-sectional view of a portion of the shackle.
DETAILED DESCRIPTION FIG. 1 illustrates a conventional padlock 10 having a shackle 11 which fits into and locks within the padlock casing or body 12. The construction and locking parts of the casing are omitted since these form no part of the invention herein. A locking bar 13, which is arranged within and forms part of the locking mechanism, is schematically illustrated. This bar engages notches I4 and 15 formed in the shackle to lock the shackle into the padlock casing. It should be under stood that the shackle of this invention may be used with any form of padlock casing, regardless of the type of locking mechanism included therein.
The shackle is formed of a central core 16 which preferably is roughly spline-shaped in cross-section and of uniform diameter. The core lower end 17 may be flared or tapered. The core is thus provided with a number of longitudinally extending shallow grooves 18 defined by the tooth-like formation of the spline.
A tubular sheath 19 is closely fitted over the core (see FIG. 4), including force fitting the lower end 20 of the sheath around the flared end 17 of the core. Additionally, where desired, the lower end 20 may be welded at 20a to the core lower end. As illustrated in the drawing, the tube is preferably of greater length than the core so that its upper end 21 extends a distance above the upper end of the core.
The grooves 18 are filled with a matrix 22 formed of hard particles 23 (see FIG. 8) and a binder 24. The particles are preferably of a hard metal carbide such as tungsten carbide, either cast or cemented, or other similar carbide particles which have high degrees of hardness. The binder may be of a soft metal material, such as copper braze or other suitable brazing materials. The particles are closely packed within the grooves and the spaces between them are filled with the binder to form a solid matrix.
METHOD OF MAKING SHACKLE A method of forming the improved shackle herein is as follows: First, the core 16 is formed with the longitudinally extending shallow grooves and the flared end 17 (see FIG. 3). Next, the thin walled tubular sheath is forced into position around the core, as illustrated in FIG. 4. Then, the hard'particles are poured into the grooves, with the rod arranged upright as shown in FIG. 5, to form a packing of particles within the grooves. The space at the upper end 21 of the tube 19 may then be filled with pellets or beads or powder of the brazing compound, such as copper brazing pellets 25, and while the rod is held upright, it is heated to melt the braze which flows downwardly, filling the spaces be tween the particles. Preferably enough braze is placed into the tube, so that the upper end 21 of the tube is filled with braze material above the upper end of the core. When the rod is permitted to cool and the braze to solidify, a slug 26 of braze fills the upper end of the sheath (see FIG. 6).
Next, the composite rod is swaged to reduce its diameter to required size, while simultaneously elongating it and more importantly, work hardening the metal forming the sleeve and the core. Both of these metals are selected from the work hardenable steels, with the tube preferably being of a stainless steel material to provide a greater toughness, corrosion resistance, improved appearance, etc.
After the swaging, the rod is of uniform cross-section, the flared portion being reduced to the common diameter of the rod.
Thereafter, the rod may be bent into the U-shaped shackle form illustrated in FIG. 7 and the notches l4 and formed therein. The notch 14 may be easily cut into the shackle since it is arranged in the area of the end of the core where there is no matrix material. On the other hand, the notch 15, located in an area where there is matrix material, may be formed either by a suitable deformation process or electrical or heat cutting method.
Alternatively, the area into which the notch 15 is formed may be made without the groove and matrix so as to permit easy notching.
The portion of the shackle below the notch 15, that is, where the slug 26 of braze fills the tube, is concealed within the padlock casing and does not carry any unexpected loads. Thus, the slug 26 simply functions as a filler, as a place where openings may be easily drilled through for various types of locking mechanisms, and also as a heat conductor to remove heat which may be applied to the shackle.
EXAMPLE OF CONSTRUCTION While the materials and the sizes and shape of the shackle may vary, an example of its construction is as follows: A one-half inch diameter spline formed of work hardenable 304 stainless steel rod was provided with six grooves, equally spaced apart around its surface, the grooves being approximately 0.12 wide by 0.08 deep. The grooves were filled with cemented tungsten carbide grit of approximately 12/20 mesh size. The tube or sheath was made of approximately ninesixteenths outside diameter, with a wall thickness of approximately 0.028 inches and formed of 304 stainless steel tubing. Conventional copper braze was used as the binder.
After the assembly, the rod was swaged down to a little less than one-half inch in diameter. The swaging also work hardened the material to roughly Rockwell c-l0.
The bent shackle resisted penetration by and destroyed all available saws, including carbide coated ones of the rod-saw type, sustained in excess of 16,000 pounds tensile test and resisted breakage by repeated pounding with a conventional four pound hammer. All of the foregoing results were far in excess of any possible results achieveable in conventional shackles.
While the rod-like construction and method are described in connection with shackles for padlocks, it may likewise be used in other applications where similar types of penetration resistance, impact resistance and stretching resistance is desired, such as for example, protective bars, jail bars, locking bars, etc. Likewise, the cross-sectional shape may be varied as may the shape of the grooves or passageways or spaces which are arranged between the core and the sheath.
Having fully described an operative embodiment of this invention, we now claim.
1. In a lock shackle formed of an elongated, rod-like member bent into a shackle shape, the improvement comprising:
said member being formed of an elongated metal core surrounded by a closely fitting, thin metal sheath, with longitudinally extending shallow passageways formed between the core and the sheath;
said passageways being filled with a matrix formed of closely packed particles of a hard material, such as a metal carbide, and a binder material.
2. A construction as defined in claim 1, and said core being approximately spline shaped in cross-section, that is, with longitudinally extending tooth-shaped formations arranged around its periphery to define said passageways therebetween, and said sheath being in the form of a metal tube closely fitted upon the core for contact with the outer peripheral surfaces of said tooth formations.
3. A construction as defined in claim 2, and the sheath having an end portion extending a distance beyond one end of the core and filled with binder material, with the opposite end of the core having a short end portion which is ungrooved and in full surface to surface contact with the adjacent interior surface of the sheath.
4. A construction as defined in claim 1, and said metal being characterized by being work hardenable,
and said member being work hardened.

Claims (3)

  1. 2. A construction as defined in claim 1, and said core being approximately spline shaped in cross-section, that is, with longitudinally extending tooth-shaped formations arranged around its periphery to define said passageways therebetween, and said sheath being in the form of a metal tube closely fitted upon the core for contact with the outer peripheral surfaces of said tooth formations.
  2. 3. A construction as defined in claim 2, and the sheath having an end portion extending a distance beyond one end of the core and filled with binder material, with the opposite end of the core having a short end portion which is ungrooved and in full surface to surface contact with the adjacent interior surface of the sheath.
  3. 4. A construction as defined in claim 1, and said metal being characterized by being work hardenable, and said member being work hardened.
US00260397A 1972-06-07 1972-06-07 Saw and impact resistant lock shackle Expired - Lifetime US3777517A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948613A (en) * 1972-12-07 1976-04-06 Weill Theodore C Process for applying a protective wear surface to a wear part
US3976434A (en) * 1974-07-26 1976-08-24 Shwayder Warren M Saw and impact resistant member
US4064716A (en) * 1976-04-05 1977-12-27 The Shwayder Company Saw resistant lock
US4561272A (en) * 1984-07-05 1985-12-31 The United States Of America As Represented By The Secretary Of The Navy Padlock shackle
US5010746A (en) * 1990-04-25 1991-04-30 Kryptonite Corporation Bicycle lock
US5257517A (en) * 1991-09-19 1993-11-02 Dale James E Bicycle lock sleeve
US5694796A (en) * 1995-03-30 1997-12-09 Couillard; Richard Alexander Hinged lock with detent positions
WO2012138916A1 (en) 2011-04-06 2012-10-11 Esco Corporation Hardfaced wearpart using brazing and associated method and assembly for manufacturing
US8863562B1 (en) * 2007-11-30 2014-10-21 Jeffery Leving Combination lock and anti-jimmying device
US10378246B2 (en) * 2016-03-04 2019-08-13 SkunkLock, Inc. Theft deterrent device and system
US10543528B2 (en) 2012-01-31 2020-01-28 Esco Group Llc Wear resistant material and system and method of creating a wear resistant material
US11111699B2 (en) 2016-03-04 2021-09-07 SkunkLock, Inc. Theft deterrent device and system
EP3824154A4 (en) * 2018-07-24 2022-04-27 Skunklock, Inc. Theft deterrent device and system
WO2023052778A1 (en) * 2021-09-29 2023-04-06 Zeal Innovation Ltd Security devices

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US3447230A (en) * 1967-01-05 1969-06-03 Sylvania Electric Prod Art of making seamless hollow bodies from sinterable powders
US3551991A (en) * 1969-04-16 1971-01-05 Gen Electric Infiltrated cemented carbides
US3713309A (en) * 1971-11-04 1973-01-30 Sargent & Greenleaf Key operable padlock with slidable seal for plug

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3447230A (en) * 1967-01-05 1969-06-03 Sylvania Electric Prod Art of making seamless hollow bodies from sinterable powders
US3551991A (en) * 1969-04-16 1971-01-05 Gen Electric Infiltrated cemented carbides
US3713309A (en) * 1971-11-04 1973-01-30 Sargent & Greenleaf Key operable padlock with slidable seal for plug

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948613A (en) * 1972-12-07 1976-04-06 Weill Theodore C Process for applying a protective wear surface to a wear part
US3976434A (en) * 1974-07-26 1976-08-24 Shwayder Warren M Saw and impact resistant member
US4064716A (en) * 1976-04-05 1977-12-27 The Shwayder Company Saw resistant lock
US4561272A (en) * 1984-07-05 1985-12-31 The United States Of America As Represented By The Secretary Of The Navy Padlock shackle
US5010746A (en) * 1990-04-25 1991-04-30 Kryptonite Corporation Bicycle lock
US5092142A (en) * 1990-04-25 1992-03-03 Kryptonite Corporation Bicycle lock
US5257517A (en) * 1991-09-19 1993-11-02 Dale James E Bicycle lock sleeve
US5694796A (en) * 1995-03-30 1997-12-09 Couillard; Richard Alexander Hinged lock with detent positions
US8863562B1 (en) * 2007-11-30 2014-10-21 Jeffery Leving Combination lock and anti-jimmying device
CN105171167A (en) * 2011-04-06 2015-12-23 埃斯科公司 Hardfaced Wearpart Using Brazing And Associated Method And Assembly For Manufacturing
TWI622462B (en) * 2011-04-06 2018-05-01 艾斯克股份有限公司 Hardfaced wearpart using brazing and associated method and assembly for manufacturing
AU2012240099B2 (en) * 2011-04-06 2014-08-14 Esco Group Llc Hardfaced wearpart using brazing and associated method and assembly for manufacturing
US20120258273A1 (en) * 2011-04-06 2012-10-11 Esco Corporation Hardfaced Wearpart Using Brazing And Associated Method And Assembly For Manufacturing
EP2694284A4 (en) * 2011-04-06 2015-12-02 Esco Corp Hardfaced wearpart using brazing and associated method and assembly for manufacturing
WO2012138916A1 (en) 2011-04-06 2012-10-11 Esco Corporation Hardfaced wearpart using brazing and associated method and assembly for manufacturing
CN103476583B (en) * 2011-04-06 2016-11-02 埃斯科公司 Use the Surface hardened layer wear parts of hard solder and the correlation technique of manufacture thereof and assembly
AU2012240099C1 (en) * 2011-04-06 2016-12-01 Esco Group Llc Hardfaced wearpart using brazing and associated method and assembly for manufacturing
US9561562B2 (en) * 2011-04-06 2017-02-07 Esco Corporation Hardfaced wearpart using brazing and associated method and assembly for manufacturing
CN106626607A (en) * 2011-04-06 2017-05-10 埃斯科公司 Hardfaced wearpart and associated method for manufacturing
EA028714B1 (en) * 2011-04-06 2017-12-29 Эско Корпорейшн Hardfaced wearpart manufactured using brazing and associated method and assembly for manufacturing
CN103476583A (en) * 2011-04-06 2013-12-25 埃斯科公司 Hardfaced wearpart using brazing and associated method and assembly for manufacturing
KR101910218B1 (en) 2011-04-06 2018-10-19 에스코 코포레이션 Hardfaced wearpart using brazing and associated method and assembly for manufacturing
CN106626607B (en) * 2011-04-06 2019-02-12 爱斯科集团有限责任公司 Wear parts and its manufacturing method
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