WO1996037677A1 - Improved spring loaded lock - Google Patents

Improved spring loaded lock Download PDF

Info

Publication number
WO1996037677A1
WO1996037677A1 PCT/US1996/007402 US9607402W WO9637677A1 WO 1996037677 A1 WO1996037677 A1 WO 1996037677A1 US 9607402 W US9607402 W US 9607402W WO 9637677 A1 WO9637677 A1 WO 9637677A1
Authority
WO
WIPO (PCT)
Prior art keywords
lock
locking
lock body
locking member
section
Prior art date
Application number
PCT/US1996/007402
Other languages
French (fr)
Inventor
Dani Markbreit
Original Assignee
Mul-T-Lock Technologies Ltd.
Mul-T-Lock U.S.A., Inc.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mul-T-Lock Technologies Ltd., Mul-T-Lock U.S.A., Inc. filed Critical Mul-T-Lock Technologies Ltd.
Priority to AU58700/96A priority Critical patent/AU5870096A/en
Publication of WO1996037677A1 publication Critical patent/WO1996037677A1/en

Links

Classifications

    • 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
    • E05B67/063—Padlocks with removable shackles

Definitions

  • the present invention relates to locks general ⁇ ly and more particularly to locks with spring loaded locking assemblies.
  • One known type of lock includes a lock body having formed therein at least one bore for lockingly receiving therein a locking member. Inside the lock body there is provided a spring loaded locking assembly which, when actuated, lockingly engages the locking member.
  • the present invention seeks to provide a lock which defeats attempts to overcome locks having spring loaded locking assemblies.
  • a lock including a lock body having formed therein at least one bore for lockingly receiving therein a locking member and a biased locking assembly which, when actuated, lockingly engages the locking member, the lock being characterized in that said bore and said locking member each have a non-circular cross-section.
  • the non-circular cross-section includes a generally circular cross section having at least one protrusion.
  • the at least one protrusion extends radially inward.
  • the lock body includes a pair of radially inwardly directed protrusions at each bore and each locking member includes recesses of corresponding cross section.
  • any unauthorized rotation of the locking members or of shims in the bores causes deformation of the protrusions, which deformation being testimony to an unauthorized attempt to remove the locking members from the lock body.
  • Figs. 1A and IB are simplified pictorial illus ⁇ trations of a lock, including a lock body and a shackle, constructed and operative in accordance with a preferred embodiment of the present invention, the shackle being respectively disengaged and engaged with the lock body;
  • Fig. 2 is a sectional illustration of the lock of Figs. 1A and IB, taken along lines II - II in Fig. IB, the shackle being in a locked engagement with the lock body;
  • Fig. 3 is a simplified illustration of a lock cylinder of the lock of Figs. 1A and IB, viewed along line III in Fig. 2;
  • Fig. 4 is a sectional illustration of the lock of Figs. 1A and IB, taken along lines IV - IV in Fig. IB, the shackle being in an unlocked orientation with respect to the lock body;
  • Fig. 5 is a simplified illustration of bores of non-circular cross section provided in the lock body of the lock of Figs. 1A and IB, taken along lines V - V in Fig. IB;
  • Figs. 6A and 6B are simplified illustrations of bores of circular cross section in another lock, in respective locked and forcibly unlocked orientations;
  • Figs. 7A and 7B are simplified pictorial illus ⁇ trations of a lock, including a lock body and a shackle, constructed and operative in accordance with another preferred embodiment of the present invention, the shack ⁇ le being respectively disengaged and engaged with the lock body.
  • FIG. 1A and IB illustrate a lock 10 constructed and operative in accord ⁇ ance with a preferred embodiment of the present inven ⁇ tion.
  • Lock 10 comprises a lock body 12 and a shackle 14.
  • Shackle 14 preferably comprises a generally U-shaped element 16 having a pair of locking members 18 and 20, at least one and preferably both of which are formed with a notch 22.
  • Lock body 12 preferably comprises a cover member 24, typically formed of plastic, which at least partially encloses a lock housing 26.
  • Shackle 14 is shown respectively disengaged and engaged with lock body 12 in Figs. 1A and IB.
  • lock housing 26 comprises an enclosure 28 which defines a pair of bores 30 and 32 which accommodate locking members 18 and 20 respectively.
  • Lock housing 26 also comprises a lock cylinder 34 and first and second locking elements 36 and 38 which are biased by a biasing device, such as being spring loaded by a spring 40.
  • First and second locking elements 36 and 38 are displaced by operation of lock cylinder 34 into and out of locking engagement with notches 22 on respective locking members 18 and 20, as described hereinbelow.
  • lock cylinder 34 includes a cylinder housing 42 and a plug 44 rotatable within cylinder housing 42 and defin ⁇ ing a keyway 46 which accepts a key 48.
  • key 48 may be used to rotate plug 44 to actuate a cam 50 which causes, as is known in the art, first lock ⁇ ing element 36 to move against spring 40 in the direction of arrow 52 and second locking element 38 to move against spring 40 in the direction of arrow 54, thereby displac ⁇ ing locking elements 36 and 38 out of locking engagement with notches 22 on respective locking members 18 and 20.
  • Shackle 14 may now be removed from lock body 12.
  • bores 30 and 32 each have a non-circular cross- section.
  • the non-circular cross-section includes a generally circular cross section having at least one protrusion 58.
  • protrusions 58 extend radially inward.
  • lock body 12 includes a pair of radially inwardly direct ⁇ ed protrusions 58 at each of bores 30 and 32 and locking members 18 and 20 include recesses 60 of corresponding cross section, as shown in Fig. 1A.
  • Figs. 6A and 6B illustrate a lock 100 identical with lock 10 described hereinabove, like elements being numbered with like numerals, with the exception that lock 100 is provided with bores 102 and 104 of generally circular cross sec- tion.
  • first and second locking elements 36 and 38 are biased by spring 40 against notch ⁇ es 22 on respective locking members 18 and 20.
  • Persons of ill repute may cleave the U-shaped body of shackle 14 in a region designated by reference numeral 106 (Fig. 2), so as to isolate locking members 18 and 20.
  • each locking member 18 and 20 may then be forcibly rotated in respective bores 102 and 104, such as in the direction of respective arrows 108 and 110, so as to cause first locking element 36 to move against spring 40 in the direction of arrow 52 and second locking element 38 to move against spring 40 in the direction of arrow 54, thereby displacing locking elements 36 and 38 out of locking engagement with notches 22 on respective locking members 18 and 20.
  • This allows shackle 14 to be removed from lock body 12 without using key 48.
  • locking elements 36 and 38 may be displaced by persons of ill repute by inserting thin arcuate shims in respective bores 102 and 104 between respective locking members 18 and 20 and lock body 12. The shims may then be rotated about the periphery of each locking member in its respective bore, such as in the direction of arrows 108 and 110, as described hereinabove with reference to Fig. 6B, to displace locking elements 36 and 38 out of locking engagement with notches 22 on respective locking members 18 and 20.
  • bores 30 and 32 substantially prevents rotation of locking members 18 and 20 in respective bores 30 and 32, as well as rotation of shims therein, thereby substantially prevent ⁇ ing unauthorized removal of shackle 14 from lock body 12.
  • any unauthorized rotation of locking members 18 and 20 or of shims in respective bores 30 and 32 causes deformation of protrusions 58, which deforma ⁇ tion being testimony to an unauthorized attempt to remove shackle 14 from lock body 12.
  • Figs. 7A and 7B illustrate a lock 120 constructed and operative in ac ⁇ cordance with another preferred embodiment of the present invention.
  • Lock 120 is identical with lock 10 described hereinabove with reference to Figs. 1A - 5, except that lock 120 includes a lock body 122 shaped differently from lock body 12.

Landscapes

  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
  • Lock And Its Accessories (AREA)
  • Clamps And Clips (AREA)

Abstract

A lock (10) including a lock body (12) having formed therein at least one bore (30, 32) for lockingly receiving therein a locking member (18, 20) and a biased locking assembly (36, 38) which, when actuated, lockingly engages the locking member (18, 20), the lock (10) being characterized in that the bore (30, 32) and the locking member (18, 20) each have a non-circular cross section.

Description

IMPROVED SPRING LOADED LOCK
FIELD OF THE INVENTION
The present invention relates to locks general¬ ly and more particularly to locks with spring loaded locking assemblies.
BACKGROUND OF THE INVENTION
Various types of locks are known. One known type of lock includes a lock body having formed therein at least one bore for lockingly receiving therein a locking member. Inside the lock body there is provided a spring loaded locking assembly which, when actuated, lockingly engages the locking member.
Persons of ill repute have attempted to over¬ come locks of this type by inserting thin shims in the bore between the locking member and the lock body and subsequently displacing such elements about the periphery of the locking member in the bore.
SUMMARY OF THE INVENTION
The present invention seeks to provide a lock which defeats attempts to overcome locks having spring loaded locking assemblies.
There is thus provided in accordance with a preferred embodiment of the present invention a lock including a lock body having formed therein at least one bore for lockingly receiving therein a locking member and a biased locking assembly which, when actuated, lockingly engages the locking member, the lock being characterized in that said bore and said locking member each have a non-circular cross-section.
Preferably, the non-circular cross-section includes a generally circular cross section having at least one protrusion. In accordance with a preferred embodiment of the present invention, the at least one protrusion extends radially inward.
Preferably the lock body includes a pair of radially inwardly directed protrusions at each bore and each locking member includes recesses of corresponding cross section.
It is a particular feature of the present invention that any unauthorized rotation of the locking members or of shims in the bores causes deformation of the protrusions, which deformation being testimony to an unauthorized attempt to remove the locking members from the lock body.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be understood and appreciated from the following detailed description, taken in conjunction with the drawings in which:
Figs. 1A and IB are simplified pictorial illus¬ trations of a lock, including a lock body and a shackle, constructed and operative in accordance with a preferred embodiment of the present invention, the shackle being respectively disengaged and engaged with the lock body;
Fig. 2 is a sectional illustration of the lock of Figs. 1A and IB, taken along lines II - II in Fig. IB, the shackle being in a locked engagement with the lock body;
Fig. 3 is a simplified illustration of a lock cylinder of the lock of Figs. 1A and IB, viewed along line III in Fig. 2;
Fig. 4 is a sectional illustration of the lock of Figs. 1A and IB, taken along lines IV - IV in Fig. IB, the shackle being in an unlocked orientation with respect to the lock body;
Fig. 5 is a simplified illustration of bores of non-circular cross section provided in the lock body of the lock of Figs. 1A and IB, taken along lines V - V in Fig. IB;
Figs. 6A and 6B are simplified illustrations of bores of circular cross section in another lock, in respective locked and forcibly unlocked orientations; and
Figs. 7A and 7B are simplified pictorial illus¬ trations of a lock, including a lock body and a shackle, constructed and operative in accordance with another preferred embodiment of the present invention, the shack¬ le being respectively disengaged and engaged with the lock body.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Reference is now made to Figs. 1A and IB which illustrate a lock 10 constructed and operative in accord¬ ance with a preferred embodiment of the present inven¬ tion.
Lock 10 comprises a lock body 12 and a shackle 14. Shackle 14 preferably comprises a generally U-shaped element 16 having a pair of locking members 18 and 20, at least one and preferably both of which are formed with a notch 22. Lock body 12 preferably comprises a cover member 24, typically formed of plastic, which at least partially encloses a lock housing 26.
Shackle 14 is shown respectively disengaged and engaged with lock body 12 in Figs. 1A and IB.
Referring additionally to Fig. 2, it is seen that lock housing 26 comprises an enclosure 28 which defines a pair of bores 30 and 32 which accommodate locking members 18 and 20 respectively. Lock housing 26 also comprises a lock cylinder 34 and first and second locking elements 36 and 38 which are biased by a biasing device, such as being spring loaded by a spring 40. First and second locking elements 36 and 38 are displaced by operation of lock cylinder 34 into and out of locking engagement with notches 22 on respective locking members 18 and 20, as described hereinbelow.
Referring additionally to Fig. 3, it is seen that lock cylinder 34 includes a cylinder housing 42 and a plug 44 rotatable within cylinder housing 42 and defin¬ ing a keyway 46 which accepts a key 48.
Referring additionally to Fig. 4, it is seen that key 48 may be used to rotate plug 44 to actuate a cam 50 which causes, as is known in the art, first lock¬ ing element 36 to move against spring 40 in the direction of arrow 52 and second locking element 38 to move against spring 40 in the direction of arrow 54, thereby displac¬ ing locking elements 36 and 38 out of locking engagement with notches 22 on respective locking members 18 and 20. Shackle 14 may now be removed from lock body 12.
Referring additionally to Fig. 5, it is seen that bores 30 and 32 each have a non-circular cross- section. Preferably, the non-circular cross-section includes a generally circular cross section having at least one protrusion 58. In accordance with a preferred embodiment of the present invention, protrusions 58 extend radially inward.
In the illustrated embodiment of Figs. 1A - 5, lock body 12 includes a pair of radially inwardly direct¬ ed protrusions 58 at each of bores 30 and 32 and locking members 18 and 20 include recesses 60 of corresponding cross section, as shown in Fig. 1A.
Reference is now made to Figs. 6A and 6B which illustrate a lock 100 identical with lock 10 described hereinabove, like elements being numbered with like numerals, with the exception that lock 100 is provided with bores 102 and 104 of generally circular cross sec- tion. In Fig. 6A it is seen that first and second locking elements 36 and 38 are biased by spring 40 against notch¬ es 22 on respective locking members 18 and 20. Persons of ill repute may cleave the U-shaped body of shackle 14 in a region designated by reference numeral 106 (Fig. 2), so as to isolate locking members 18 and 20.
As shown in Fig. 6B, each locking member 18 and 20 may then be forcibly rotated in respective bores 102 and 104, such as in the direction of respective arrows 108 and 110, so as to cause first locking element 36 to move against spring 40 in the direction of arrow 52 and second locking element 38 to move against spring 40 in the direction of arrow 54, thereby displacing locking elements 36 and 38 out of locking engagement with notches 22 on respective locking members 18 and 20. This allows shackle 14 to be removed from lock body 12 without using key 48.
Alternatively, locking elements 36 and 38 may be displaced by persons of ill repute by inserting thin arcuate shims in respective bores 102 and 104 between respective locking members 18 and 20 and lock body 12. The shims may then be rotated about the periphery of each locking member in its respective bore, such as in the direction of arrows 108 and 110, as described hereinabove with reference to Fig. 6B, to displace locking elements 36 and 38 out of locking engagement with notches 22 on respective locking members 18 and 20.
Referring again to Fig. 5, it is appreciated that the non-circular cross sectional shape of bores 30 and 32 substantially prevents rotation of locking members 18 and 20 in respective bores 30 and 32, as well as rotation of shims therein, thereby substantially prevent¬ ing unauthorized removal of shackle 14 from lock body 12.
It is a particular feature of the present invention that any unauthorized rotation of locking members 18 and 20 or of shims in respective bores 30 and 32 causes deformation of protrusions 58, which deforma¬ tion being testimony to an unauthorized attempt to remove shackle 14 from lock body 12.
Reference is now made to Figs. 7A and 7B which illustrate a lock 120 constructed and operative in ac¬ cordance with another preferred embodiment of the present invention. Lock 120 is identical with lock 10 described hereinabove with reference to Figs. 1A - 5, except that lock 120 includes a lock body 122 shaped differently from lock body 12.
It will be appreciated by persons skilled in the art that the present invention is not limited to what has been particularly shown and described hereinabove. Rather, the scope of the present invention is defined only by the claims that follow:

Claims

1. A lock comprising : a lock body having formed therein at least one bore for lockingly receiving therein a locking member and a biased locking assembly which, when actuated, lockingly engages said locking member, said lock being character¬ ized in that said bore and said locking member each have a non-circular cross-section.
2. A lock according to claim 1 and wherein said non-circular cross-section comprises a generally circular cross section having at least one protrusion.
3. A lock according to claim 2 and wherella said at least one protrusion extends radially inward.
4. A lock according to claim 1 and wherein said lock body comprises a pair of radially inwardly directed protrusions at each said bore and each said locking member comprises recesses of corresponding cross section.
5. A lock according to any of claims 2 - 4 and wherein unauthorized rotation of said locking members or of shims in said bores causes deformation of said pro¬ trusions, which deformation being testimony to an unau¬ thorized attempt to remove said locking members from said lock body.
PCT/US1996/007402 1995-05-21 1996-05-21 Improved spring loaded lock WO1996037677A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU58700/96A AU5870096A (en) 1995-05-21 1996-05-21 Improved spring loaded lock

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL11380295A IL113802A0 (en) 1995-05-21 1995-05-21 Improved spring loaded lock
IL113802 1995-05-21

Publications (1)

Publication Number Publication Date
WO1996037677A1 true WO1996037677A1 (en) 1996-11-28

Family

ID=11067502

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/007402 WO1996037677A1 (en) 1995-05-21 1996-05-21 Improved spring loaded lock

Country Status (4)

Country Link
AU (1) AU5870096A (en)
IL (1) IL113802A0 (en)
TW (2) TW297443U (en)
WO (1) WO1996037677A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1160404A1 (en) * 2000-05-30 2001-12-05 ABUS August Bremicker Söhne KG Padlock
WO2010096876A1 (en) * 2009-02-27 2010-09-02 Origineering Pty Ltd Locking mechanism, for a padlock for example, in which a shackle can be severed for luggage inspection and then relocked
EP3699378A1 (en) * 2014-06-12 2020-08-26 Schlage Lock Company LLC Hoop lock with dual locking

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US899268A (en) * 1906-07-12 1908-09-22 Miller Lock Company Padlock-shackle.
US2479199A (en) * 1948-08-05 1949-08-16 Rennett George Combination automotive-vehicle truck lock and seal device
GB1405429A (en) * 1972-12-19 1975-09-10 Bloxvich Lock Stamping Security device for freight containers and the like
US3966247A (en) * 1973-06-04 1976-06-29 Madge Canter Associates, Inc. Keyless padlock
US5454244A (en) * 1994-02-24 1995-10-03 Liou; Gaieter Lock assembly for gearshift stick of vehicles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US899268A (en) * 1906-07-12 1908-09-22 Miller Lock Company Padlock-shackle.
US2479199A (en) * 1948-08-05 1949-08-16 Rennett George Combination automotive-vehicle truck lock and seal device
GB1405429A (en) * 1972-12-19 1975-09-10 Bloxvich Lock Stamping Security device for freight containers and the like
US3966247A (en) * 1973-06-04 1976-06-29 Madge Canter Associates, Inc. Keyless padlock
US5454244A (en) * 1994-02-24 1995-10-03 Liou; Gaieter Lock assembly for gearshift stick of vehicles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1160404A1 (en) * 2000-05-30 2001-12-05 ABUS August Bremicker Söhne KG Padlock
WO2010096876A1 (en) * 2009-02-27 2010-09-02 Origineering Pty Ltd Locking mechanism, for a padlock for example, in which a shackle can be severed for luggage inspection and then relocked
JP2012519243A (en) * 2009-02-27 2012-08-23 オリジニアリング ピーティーワイ リミテッド Locking mechanism for padlocks, for example, can be latched and re-locked after baggage inspection
US8327674B2 (en) 2009-02-27 2012-12-11 Origineering Pty Ltd Locking mechanism, for a padlock for example, in which a shackle can be severed for luggage inspection and then relocked
EP3699378A1 (en) * 2014-06-12 2020-08-26 Schlage Lock Company LLC Hoop lock with dual locking
US11746567B2 (en) 2014-06-12 2023-09-05 Schlage Lock Company Llc Hoop lock with dual locking

Also Published As

Publication number Publication date
AU5870096A (en) 1996-12-11
TW312280U (en) 1997-08-01
TW297443U (en) 1997-02-01
IL113802A0 (en) 1995-08-31

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