WO1997022502A1 - Theft lock for cars - Google Patents

Theft lock for cars Download PDF

Info

Publication number
WO1997022502A1
WO1997022502A1 PCT/SE1995/001525 SE9501525W WO9722502A1 WO 1997022502 A1 WO1997022502 A1 WO 1997022502A1 SE 9501525 W SE9501525 W SE 9501525W WO 9722502 A1 WO9722502 A1 WO 9722502A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
exhaust pipe
theft device
screw
lock
Prior art date
Application number
PCT/SE1995/001525
Other languages
French (fr)
Inventor
Kennet Hallberg
Eddie Nielsen
Original Assignee
Kennet Hallberg
Eddie Nielsen
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
Priority to SE9402280A priority Critical patent/SE504246C2/en
Application filed by Kennet Hallberg, Eddie Nielsen filed Critical Kennet Hallberg
Priority to AU46365/96A priority patent/AU4636596A/en
Priority to PCT/SE1995/001525 priority patent/WO1997022502A1/en
Publication of WO1997022502A1 publication Critical patent/WO1997022502A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • B60R25/04—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor
    • B60R25/043—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor by blocking the exhaust

Definitions

  • the present invention relates to an anti-theft device for automobiles and other vehicles having combustion engines, in which a lockable barrier is inserted in the exhaust pipe.
  • the anti-theft device consists of a sleeve closed at the end, which is designed to be fitted over the rear end of an exhaust pipe, said sleeve being connected with a screw or a shaft provided with a thread, which in turn is connected to a nut connected to collet jaws for clamping against the inner wall of the exhaust pipe or being released therefrom, and that a lock is applied in the sleeve, designed to connect the screw to the sleeve or release this connection, the latter situation resulting in the engine being unable to start.
  • the path of the exhaust fumes is thus effectively blocked, thereby preventing the engine from starting.
  • the collet jaws can easily be placed some way into the exhaust pipe, thereby making it difficult to remove the anti-theft device by force, at least not without actuating any alarm device that may be on the automobile.
  • the collet jaws can be efficiently locked to the inner wall of the exhaust pipe.
  • the collet jaws can be placed some distance into the exhaust pipe, a distance considerably greater than the diameter of the exhaust pipe, more than twice this dimension for example. Sawing such a large piece off the exhaust pipe with a hack saw is difficult and would quickly attract attention.
  • the lock can easily be placed on the exhaust pipe and equally easily be removed by the person who has the key.
  • the accompanying drawing illustrates an anti-theft device according to the invention, designed to be fitted over the rear end of the exhaust pipe (10) of an automobile or other vehicle having a combustion engine.
  • the anti-theft device consists of a sleeve (2) with a lock (1) arranged in its rear end.
  • the sleeve can be connected with a screw or a shaft (4) provided with a thread, and a rubber ring is arranged at (3).
  • (5) is an inner sleeve around the shaft (4).
  • a yoke (8) and a nut (9) are arranged around the shaft (4).
  • (6) denotes two (or more) collet jaws of metal or steel, designed to be clamped against the inner wall of the exhaust pipe when applied.
  • the lock is arranged in one position to connect the shaft or screw (4) with the sleeve (hood 2) so that when this is turned in one direction the collet jaws (6) are clamped against the inner wall of the exhaust pipe, and in the other direction are released therefrom.
  • the sleeve (2) is also closed at the end, possibly by the lock, and the path of the exhaust fumes is thus also (or solely) blocked by the rubber ring (3).
  • the anti-theft device is easy to apply and remove for the owner of the key and, due to the distance in to the collet jaws, the lock is difficult to force.
  • the distance from the rear end of the sleeve (2) to the collet jaws (6) is considerably greater than the diameter of the exhaust pipe (10), suitably more than twice this dimension.
  • the outer sleeve (2) may be made of metal or steel, or even of plastic.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Exhaust Silencers (AREA)

Abstract

The present invention relates to an anti-theft device for automobiles and other vehicles having combustion engines. The anti-theft device is characterized in that it consists of a sleeve (2) designed to be fitted over the rear end (10) of an exhaust pipe, said sleeve comprising a lock (1) connected to a screw or a shaft (4) provided with a thread, which when turned in one direction by means of the sleeve (2) is designed to cause collet jaws (6) for clamping to the exhaust pipe, and in the other direction to release them. The lock (1) is designed in one position to connect the screw, etc. to the outer sleeve (2) in order to cause the collet jaws (6) to block or release, and in another position to release the screw, etc. (6) from the outer sleeve (2), whereupon the engine cannot be started.

Description

Theft lock for cars
Technical field:
The present invention relates to an anti-theft device for automobiles and other vehicles having combustion engines, in which a lockable barrier is inserted in the exhaust pipe.
Background art:
In view of the ever increasing theft of vehicles, such as automobile thefts, increasingly sophisticated locks are required, particularly since the thieves have achieved an increasingly high degree of skill i n forcing or de-activating commercially available locks, even electronic locks, and in putting automobile alarms out of function.
It is known to insert a lockable barrier for exhaust fumes in the exhaust pipe of an engine which, when in locked position will prevent the exhaust fumes from escaping, thus preventing the engine from starting. However, known locks functioning on this principle have either been relatively easy to break loose or have been clumsy and complicated.
Description of the invention:
The invention aims at a solution of these and other associated problems and is characterized in that the anti-theft device consists of a sleeve closed at the end, which is designed to be fitted over the rear end of an exhaust pipe, said sleeve being connected with a screw or a shaft provided with a thread, which in turn is connected to a nut connected to collet jaws for clamping against the inner wall of the exhaust pipe or being released therefrom, and that a lock is applied in the sleeve, designed to connect the screw to the sleeve or release this connection, the latter situation resulting in the engine being unable to start. The path of the exhaust fumes is thus effectively blocked, thereby preventing the engine from starting. The collet jaws can easily be placed some way into the exhaust pipe, thereby making it difficult to remove the anti-theft device by force, at least not without actuating any alarm device that may be on the automobile.
The collet jaws, normally made of metal, can be efficiently locked to the inner wall of the exhaust pipe. The collet jaws can be placed some distance into the exhaust pipe, a distance considerably greater than the diameter of the exhaust pipe, more than twice this dimension for example. Sawing such a large piece off the exhaust pipe with a hack saw is difficult and would quickly attract attention.
The lock can easily be placed on the exhaust pipe and equally easily be removed by the person who has the key.
Drawing: The invention is exemplified in the accompanying drawing.
Description of embodiment:
The accompanying drawing illustrates an anti-theft device according to the invention, designed to be fitted over the rear end of the exhaust pipe (10) of an automobile or other vehicle having a combustion engine. The anti-theft device consists of a sleeve (2) with a lock (1) arranged in its rear end. The sleeve can be connected with a screw or a shaft (4) provided with a thread, and a rubber ring is arranged at (3). (5) is an inner sleeve around the shaft (4). A yoke (8) and a nut (9) are arranged around the shaft (4). (6) denotes two (or more) collet jaws of metal or steel, designed to be clamped against the inner wall of the exhaust pipe when applied.
The lock is arranged in one position to connect the shaft or screw (4) with the sleeve (hood 2) so that when this is turned in one direction the collet jaws (6) are clamped against the inner wall of the exhaust pipe, and in the other direction are released therefrom.
In another locking position the shaft/ screw (4) is released from the sleeve (2) and nothing happens when this is turned. If the collet jaws are then locked against the inner wall and the anti-theft device is thus in locking position, the anti-theft device cannot be removed from the exhaust pipe and the engine cannot be started since the exhaust path is then blocked by, inter alia, the rubber ring (3).
The sleeve (2) is also closed at the end, possibly by the lock, and the path of the exhaust fumes is thus also (or solely) blocked by the rubber ring (3).
The anti-theft device is easy to apply and remove for the owner of the key and, due to the distance in to the collet jaws, the lock is difficult to force. The distance from the rear end of the sleeve (2) to the collet jaws (6) is considerably greater than the diameter of the exhaust pipe (10), suitably more than twice this dimension. The outer sleeve (2) may be made of metal or steel, or even of plastic.
The device according to the invention can be modified in many ways within the scope of the following claims.

Claims

1. An anti-theft device for automobiles and other vehicles having combustion engines, in which a lockable barrier is inserted in the exhaust pipe, characterized in that this device consists of a sleeve (2) closed at the end, which is designed to be fitted over the rear end (10) of an exhaust pipe, said sleeve being connected with a screw or a shaft (4) provided with a thread, which in turn is connected to a nut (9) connected to collet jaws (6) for clamping against the inner wall of the exhaust pipe (10) or being released therefrom, and that a lock (1) is applied in the sleeve (2), designed to connect the screw (4) to the sleeve (2) or release this connection, the latter situation resulting in the engine being unable to start.
2. An anti-theft device as claimed in claim 1, characterized in that the distance from the rear end of the anti-theft device at the lock (1) to the collet jaws (6) is considerably greater than the diameter of the exhaust pipe, suitably more than twice this dimension.
3. An anti-theft device as claimed in claims 1-2, characterized in that the nut (9) is movable along the screw (4) upon being turned by the sleeve (2).
AMENDED CLAIMS
[received by the International Bureau on 18 February 1997 (18.02.97) original claims 1-3 replaced by new claims 1-4 (1 page)]
1. An anti-theft device for automobiles and other vehicles having combustion engines, in which a lockable barrier is inserted in the exhaust pipe, characterized in that this device consists of a sleeve (2) closed at the end, which is designed to be fitted over the rear end (K)) of an exhaust pipe, said sleeve being connected by a screw or a shaft (4) provided with a thread, which in turn is connected to a nut (9) connected to collet jaws (6) or other blocking means for clamping against the inner wall of the exhaust pipe (10) or being released therefrom, and that a lock (1) is applied in the sleeve (2), designed to connect the screw (4) to the sleeve (2) or release this connection, the latter situation resulting in the engine being unable to start.
2. An anti-theft device as claimed in claim 1, characteriz e_d in that the distance from the rear end of the anti-theft device at the lock (1) to the collet jaws (6) is considerably greater than the diameter of the exhaust pipe, suitably more than twice this dimension.
3. An anti-theft device as claimed in claims 1-2, characterized in that the nut (9) is movable along the screw (4) upon being turned by the sleeve (2).
4. An anti-theft device as claimed in claim 1, characterized in that the collet jaws (6) etc., blocking wholly or partially rearwards, i.e. in the direction of the exhaust opening in order to make removal of the locked anti-theft device more difficult.
PCT/SE1995/001525 1994-06-29 1995-12-18 Theft lock for cars WO1997022502A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9402280A SE504246C2 (en) 1994-06-29 1994-06-29 Theft protection for cars
AU46365/96A AU4636596A (en) 1994-06-29 1995-12-18 Theft lock for cars
PCT/SE1995/001525 WO1997022502A1 (en) 1994-06-29 1995-12-18 Theft lock for cars

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9402280A SE504246C2 (en) 1994-06-29 1994-06-29 Theft protection for cars
PCT/SE1995/001525 WO1997022502A1 (en) 1994-06-29 1995-12-18 Theft lock for cars

Publications (1)

Publication Number Publication Date
WO1997022502A1 true WO1997022502A1 (en) 1997-06-26

Family

ID=26662086

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1995/001525 WO1997022502A1 (en) 1994-06-29 1995-12-18 Theft lock for cars

Country Status (2)

Country Link
SE (1) SE504246C2 (en)
WO (1) WO1997022502A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2331553B (en) * 1997-11-20 2002-01-09 Trevor Allen Vehicle immobiliser

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3525329A1 (en) * 1985-07-16 1987-04-02 Paul Dr Couwenbergs Theft protection lock for motor vehicles and bottle-like containers
GB2186911A (en) * 1985-04-02 1987-08-26 Baffler Sa I.c. engine exhaust pipe lockable end cap
WO1993015936A1 (en) * 1992-02-13 1993-08-19 John Timothy Girvin Vehicle immobilisation device
WO1995029074A2 (en) * 1994-04-15 1995-11-02 John Double Makavilitogia An engine emission restrictor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186911A (en) * 1985-04-02 1987-08-26 Baffler Sa I.c. engine exhaust pipe lockable end cap
DE3525329A1 (en) * 1985-07-16 1987-04-02 Paul Dr Couwenbergs Theft protection lock for motor vehicles and bottle-like containers
WO1993015936A1 (en) * 1992-02-13 1993-08-19 John Timothy Girvin Vehicle immobilisation device
WO1995029074A2 (en) * 1994-04-15 1995-11-02 John Double Makavilitogia An engine emission restrictor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2331553B (en) * 1997-11-20 2002-01-09 Trevor Allen Vehicle immobiliser

Also Published As

Publication number Publication date
SE9402280L (en) 1995-12-30
SE504246C2 (en) 1996-12-16
SE9402280D0 (en) 1994-06-29

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