WO2001038672A1 - A cylinder lock with a security device - Google Patents

A cylinder lock with a security device Download PDF

Info

Publication number
WO2001038672A1
WO2001038672A1 PCT/EP2000/011698 EP0011698W WO0138672A1 WO 2001038672 A1 WO2001038672 A1 WO 2001038672A1 EP 0011698 W EP0011698 W EP 0011698W WO 0138672 A1 WO0138672 A1 WO 0138672A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
intermediate member
lock according
lock
barrel
Prior art date
Application number
PCT/EP2000/011698
Other languages
French (fr)
Inventor
Giancarlo Castelli
Emilio Bertolino
Original Assignee
Giobert S.P.A.
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 Giobert S.P.A. filed Critical Giobert S.P.A.
Priority to AU15231/01A priority Critical patent/AU1523101A/en
Publication of WO2001038672A1 publication Critical patent/WO2001038672A1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/04—Devices for coupling the turning cylinder of a single or a double cylinder lock with the bolt operating member
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/0054—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/0054—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed
    • E05B17/0058—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed with non-destructive disengagement

Definitions

  • the present invention relates to a lock, in particular for a door of a motor vehicle.
  • this lock includes:
  • the object of the present invention is to provide an improved lock compared to the ones of the prior art, with regard in particular to increasing its ability to withstand attempts to force it.
  • Figure 1 is a sectioned side-elevation view of a lock of the invention.
  • Figures 2-4 are sections view taken on the lines II-II, III-III and IV-IV respectively of Figure 1.
  • a lock in particular for a door of a motor vehicle, includes: a fixed barrel 10 with a cylinder 12 mounted for selective rotation therein, an element 14 for operating a bolt (not shown in the drawings), an intermediate member 16, also mounted for rotation inside the barrel 10, and a security device 18.
  • the cylinder 12 is of a known per se type and, once the appropriate key is inserted into the keyhole, is rotatable inside the barrel 10.
  • the intermediate member 16 is substantially cylindrical and has a first closed end 20, intended to face the cylinder 12, with a polygonal aperture 22, which can be square for example, its outline being complementary with that of a protuberance 24 projecting from the distal end of the cylinder 12.
  • the intermediate member 16 has a second, open, end 26 operable to engage a proximal end 28 of the operating member 14 and a central cross member 30 with a hole 32 aligned with the axis 34 of the cylinder 12.
  • a window 36 is also formed in a portion of the side surface of the intermediate member 16.
  • the security member 18 includes a "roof portion" 38 of a shape substantially complementary to that of the window 36 in the side of the intermediate member 16, with two pairs of legs, a distal pair 40 and a proximal pair 42 extending from the corners thereof .
  • the distal legs 40 are engageable between the cross member 30 and the open end 26 of the intermediate member 16, securing this for rotation with the operating member 14.
  • the proximal legs 42 are engageable between the cross member 30 and the closed end 20 of the intermediate member 16 and their ends furthest from the roof 38 are linked by a transverse bar 44 so as to form an opening 46 at the site of the axis 34 of the cylinder 12, for the protuberance 24 of the cylinder 12 to pass through.
  • the proximal legs 42 are hollow and house respective coil springs 48 (see Figure 3) able to react against an inner portion of the side of the intermediate member 16.
  • the operating member 14 has a proximal portion 28 secured to a distal portion 50, in the form of a rod.
  • the proximal portion 28 includes a flange 52 and a cylindrical portion 54 containing a cavity 56 which extends coaxially of the axis 34 of the cylinder 12 and faces it, with two diametrically opposed flat surfaces 58 formed on the outer surface of the cylindrical portion 54 (see Figures 2 and 4) .
  • a pin 60 is slidable within the cavity 56, with means for preventing it from sliding out completely.
  • These means include an enlarged head 62 on the distal end of the pin and an annular seal 64, with an inner diameter smaller than the cross section of the cavity 56, fixed to the mouth of the cavity 56 so as to act as a stop for the head 62.
  • the protuberance 24 of the cylinder 12 passes through the aperture 22 in the end 20 of the intermediate member 16, the aperture 46 in the security device 18 and the hole 32 in the cross member 30 of the intermediate member 16.
  • the security device 18 is thus secured to the intermediate member 16 and to the cylinder 12. Meanwhile, the distal legs 40 of the security device 18 engage the flat surfaces 58 of the operating element 14, thereby securing it to the security device 18.
  • the cylinder 12, intermediate member 16, security device 18 and operating element 14 together constitute an integral assembly, rotatable as a unit when the key is inserted into the keyhole in the cylinder 12, in substantially the same way as a conventional lock.
  • the expulsion of the security device 18 breaks the connection between the operating element 14 and the intermediate member 16. Any manipulation of the latter - which is the only component accessible from the outside through the cavity in the barrel 10 left open by the removal of the cylinder 12 - will fail to move the operating element 14. Once the connection with the distal legs 40 of the security device 18 is broken, the element 14 rotates freely, without engaging the intermediate member 16.
  • the lock of the invention is thus clearly better able to resist attempts at forcing it, especially since a perpetrator is unable to act on the element 14 which operates the bolt simply by removing the cylinder 12.
  • the protuberance 24 of the cylinder 12 inserted into the aperture 32 in the cross member 30 holds the pin 60 pressed against the bottom of the cavity 56.
  • the pin 60 plays a specific role in the assembly of the lock, which is completed by inserting the cylinder 12 into the barrel 10.

Landscapes

  • Lock And Its Accessories (AREA)
  • Centrifugal Separators (AREA)

Abstract

A lock, in particular for a door of a motor vehicle, includes: a fixed barrel (10) with a cylinder (12) mounted for selective rotation therein, a member (14) for operating a lock and an intermediate member (16) mounted for rotation inside the barrel (10) and rotatable by a distal end of the cylinder (12). The lock also includes a security member (18) able to secure the intermediate member (16) and the operating member (14) for rotation together when the cylinder (12) is mounted inside the barrel (10), and which can be expelled, preferably by means of resilient means, when the cylinder (12) is removed from the barrel (10), thus disengaging the intermediate member (16) from the operating element (14).

Description

A cylinder lock with a security device
The present invention relates to a lock, in particular for a door of a motor vehicle.
More specifically, this lock includes:
- a fixed barrel with a cylinder mounted for selective rotation therein,
- a member for operating a bolt, and
- an intermediate member mounted for rotation inside the barrel and rotatable by a distal end of the cylinder.
In the prior art, such an intermediate member is secured to the operating member. In the case of a forced opening, which is usually carried out by removing the cylinder, the perpetrator can therefore act directly on the intermediate member - which, in the absence of the cylinder, is accessible from the outside - to move the operating member and open the bolt.
The object of the present invention is to provide an improved lock compared to the ones of the prior art, with regard in particular to increasing its ability to withstand attempts to force it.
This object is achieved according to the invention by providing a lock with the characteristics specifically claimed in the Claims which follow.
Advantages and characteristics of the invention will become apparent from the detailed description which follows, with reference to the appended drawings, provided purely by way of non-limitative example, and in which: Figure 1 is a sectioned side-elevation view of a lock of the invention, and
Figures 2-4 are sections view taken on the lines II-II, III-III and IV-IV respectively of Figure 1.
A lock, in particular for a door of a motor vehicle, includes: a fixed barrel 10 with a cylinder 12 mounted for selective rotation therein, an element 14 for operating a bolt (not shown in the drawings), an intermediate member 16, also mounted for rotation inside the barrel 10, and a security device 18.
The cylinder 12 is of a known per se type and, once the appropriate key is inserted into the keyhole, is rotatable inside the barrel 10. These operating characteristics and associated structural details are well known to those skilled in the art and, being substantially transparent in the context of the present invention, are not described in detail .
The intermediate member 16 is substantially cylindrical and has a first closed end 20, intended to face the cylinder 12, with a polygonal aperture 22, which can be square for example, its outline being complementary with that of a protuberance 24 projecting from the distal end of the cylinder 12.
The intermediate member 16 has a second, open, end 26 operable to engage a proximal end 28 of the operating member 14 and a central cross member 30 with a hole 32 aligned with the axis 34 of the cylinder 12. A window 36 is also formed in a portion of the side surface of the intermediate member 16. The security member 18 includes a "roof portion" 38 of a shape substantially complementary to that of the window 36 in the side of the intermediate member 16, with two pairs of legs, a distal pair 40 and a proximal pair 42 extending from the corners thereof .
The distal legs 40 are engageable between the cross member 30 and the open end 26 of the intermediate member 16, securing this for rotation with the operating member 14. The proximal legs 42 are engageable between the cross member 30 and the closed end 20 of the intermediate member 16 and their ends furthest from the roof 38 are linked by a transverse bar 44 so as to form an opening 46 at the site of the axis 34 of the cylinder 12, for the protuberance 24 of the cylinder 12 to pass through.
The proximal legs 42 are hollow and house respective coil springs 48 (see Figure 3) able to react against an inner portion of the side of the intermediate member 16.
The operating member 14 has a proximal portion 28 secured to a distal portion 50, in the form of a rod.
The proximal portion 28 includes a flange 52 and a cylindrical portion 54 containing a cavity 56 which extends coaxially of the axis 34 of the cylinder 12 and faces it, with two diametrically opposed flat surfaces 58 formed on the outer surface of the cylindrical portion 54 (see Figures 2 and 4) .
A pin 60 is slidable within the cavity 56, with means for preventing it from sliding out completely. These means include an enlarged head 62 on the distal end of the pin and an annular seal 64, with an inner diameter smaller than the cross section of the cavity 56, fixed to the mouth of the cavity 56 so as to act as a stop for the head 62.
In the normal operating configuration of the lock shown in the drawings, the protuberance 24 of the cylinder 12 passes through the aperture 22 in the end 20 of the intermediate member 16, the aperture 46 in the security device 18 and the hole 32 in the cross member 30 of the intermediate member 16. The security device 18 is thus secured to the intermediate member 16 and to the cylinder 12. Meanwhile, the distal legs 40 of the security device 18 engage the flat surfaces 58 of the operating element 14, thereby securing it to the security device 18.
The cylinder 12, intermediate member 16, security device 18 and operating element 14 together constitute an integral assembly, rotatable as a unit when the key is inserted into the keyhole in the cylinder 12, in substantially the same way as a conventional lock.
However, if the cylinder 12 is removed from the lock in an attempt to force it, this assembly is no longer integral. As soon as the protuberance 24 of the cylinder 12 no longer engages the aperture 46 in the security device 18, this latter is expelled through the window 36 in the member 16 under the resilient force of the springs 48, which is no longer contained (see the position of the device 18 shown by a dotted line in Figure 1) .
The expulsion of the security device 18 breaks the connection between the operating element 14 and the intermediate member 16. Any manipulation of the latter - which is the only component accessible from the outside through the cavity in the barrel 10 left open by the removal of the cylinder 12 - will fail to move the operating element 14. Once the connection with the distal legs 40 of the security device 18 is broken, the element 14 rotates freely, without engaging the intermediate member 16.
The lock of the invention is thus clearly better able to resist attempts at forcing it, especially since a perpetrator is unable to act on the element 14 which operates the bolt simply by removing the cylinder 12.
As shown in Figure 1, the protuberance 24 of the cylinder 12 inserted into the aperture 32 in the cross member 30 holds the pin 60 pressed against the bottom of the cavity 56. The pin 60 plays a specific role in the assembly of the lock, which is completed by inserting the cylinder 12 into the barrel 10.
At this time the security device 18 needs to be secured to the other components of the lock during the various operations which take place before the cylinder 12 is inserted into the barrel 10. This problems is resolved by making the pin 60 protrude from the cavity 56 in such a way that it engages the aperture 46 in the security member 18, thereby holding it in the barrel 10. When the cylinder 12 is inserted into the barrel 10 to finish assembling the lock, the protuberance 24 pushes the pin 60 towards the end of the cavity (see Figure 1) where it plays no further role either in the normal operation of the lock or in the case of the security device 18 being expelled. D
Naturally, the principle of the invention remaining unchanged, manufacturing details and embodiments may vary widely from those described purely by way of non-limitative example, without departing thereby from the scope of the invention.

Claims

1. A lock, in particular for a door of a motor vehicle, which includes :
- a fixed barrel (10) with a cylinder (12) mounted for selective rotation therein,
- an element (14) for operating a bolt, and
- an intermediate member (16) mounted for rotation in the barrel (10) and rotatable by a distal end of the cylinder
(12) , the said lock being characterised in that it includes a security member (18) which can secure the intermediate member
(16) and the operating member (14) for joint rotation when the cylinder (12) is inserted into the barrel (10) , and which is expelled when the cylinder (12) is removed from the barrel
(10) , thereby disengaging the intermediate member (16) from the operating member (14) .
2. A lock according to Claim 1, characterised in that it includes resilient means able to cause the expulsion of the security element (18) .
3. A lock according to either of the preceding Claims, characterised in that the said intermediate member (16) is substantially cylindrical in shape, has a first, closed end (20) intended to face the cylinder (12) and having a substantially polygonal aperture (22) with an outline complementing that of a protuberance (24) projecting from the distal end of the cylinder (12) , a second, open end (26) for housing a proximal portion (28) of the operating member (14) , and a central cross member (30) with a hole (32) in correspondence with the axis (34) of the cylinder (12) , the intermediate member (16) also having a window (36) through a lateral portion thereof .
4. A lock according to Claim 3 , characterised in that the said security member (18) includes a "roof" portion (38) having a shape substantially complementary to that of the window (36) in the lateral surface of the intermediate member
(16) , with two pairs of legs, a distal pair (40) and a proximal pair (42) respectively, protruding from the corners thereof, the distal legs (40) being operable to engage between the cross member (30) and the open end (26) of the intermediate member (16) , thereby securing it for rotation with the operating element (14) , the proximal legs (42) being operable to engage between the cross member (30) and the closed end (20) of the intermediate member (16) and being linked at their ends furthest from the roof (38) by a transverse bar (44) so as to form an aperture (46) in correspondence with the axis (34) of the cylinder (12) through which the protuberance (24) of the cylinder (12) is able to pass .
5. A lock according to Claim 4 , characterised in that the said proximal legs (42) are hollow and house respective coil springs (48) which can react against an inner portion of the side surface of the intermediate member (16) .
6. A lock according to any one of the preceding Claims , characterised in that the operating member (14) has a proximal portion (28) and a distal portion (50) , in the form of a rod, secured to each other.
7. A lock according to Claim 6, characterised in that the said proximal portion (28) includes a flange (52) and a cylindrical portion (54) containing a cavity (56) extending coaxial of the axis (34) of the cylinder (12) and facing it, with two diametrically opposed flat surfaces (58) formed on the external surface of the cylindrical portion (54) .
8. A lock according to Claim 7, characterised in that a pin (60) is slidably mounted inside the cavity (56) , with means for preventing it from escaping totally from the cavity (56) .
9. A lock according to Claim 8, characterised in that the means for preventing the pin (60) from escaping from the cavity (56) include an enlarged head (62) at the distal end of the pin (60) and an annular seal (64) fixed in the mouth of the cavity (56) to act as a stop for the said head (62) .
PCT/EP2000/011698 1999-11-26 2000-11-24 A cylinder lock with a security device WO2001038672A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU15231/01A AU1523101A (en) 1999-11-26 2000-11-24 A cylinder lock with a security device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999TO001035A IT1310740B1 (en) 1999-11-26 1999-11-26 CYLINDER LOCK WITH SAFETY DEVICE.
ITTO99A001035 1999-11-26

Publications (1)

Publication Number Publication Date
WO2001038672A1 true WO2001038672A1 (en) 2001-05-31

Family

ID=11418249

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/011698 WO2001038672A1 (en) 1999-11-26 2000-11-24 A cylinder lock with a security device

Country Status (3)

Country Link
AU (1) AU1523101A (en)
IT (1) IT1310740B1 (en)
WO (1) WO2001038672A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1985783A2 (en) 2007-03-29 2008-10-29 Giobert S.p.A. A lock provided with a tamper-proof system, specifically for a side door of a vehicle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2590533A1 (en) * 1985-11-25 1987-05-29 Turatti Mario Steering locking anti-theft device for motor vehicles
US4669287A (en) * 1984-10-04 1987-06-02 Ford Motor Company Rupturable lock assembly
EP0647752A2 (en) * 1993-10-08 1995-04-12 Valeo Sistemas De Seguridad, S.A. Disconnectable lock for cars or the like
DE4410736A1 (en) * 1994-03-28 1995-10-05 Ewald Witte Gmbh & Co Kg Vehicle door lock cylinder
US5775147A (en) * 1994-04-13 1998-07-07 Huelsbeck & Fuerst Gmbh & Co. Kg Locking device, especially for motor vehicle locking
EP0943758A1 (en) * 1998-03-17 1999-09-22 Valeo Securite Habitacle Axial decoupling lock for car lock mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4669287A (en) * 1984-10-04 1987-06-02 Ford Motor Company Rupturable lock assembly
FR2590533A1 (en) * 1985-11-25 1987-05-29 Turatti Mario Steering locking anti-theft device for motor vehicles
EP0647752A2 (en) * 1993-10-08 1995-04-12 Valeo Sistemas De Seguridad, S.A. Disconnectable lock for cars or the like
DE4410736A1 (en) * 1994-03-28 1995-10-05 Ewald Witte Gmbh & Co Kg Vehicle door lock cylinder
US5775147A (en) * 1994-04-13 1998-07-07 Huelsbeck & Fuerst Gmbh & Co. Kg Locking device, especially for motor vehicle locking
EP0943758A1 (en) * 1998-03-17 1999-09-22 Valeo Securite Habitacle Axial decoupling lock for car lock mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1985783A2 (en) 2007-03-29 2008-10-29 Giobert S.p.A. A lock provided with a tamper-proof system, specifically for a side door of a vehicle

Also Published As

Publication number Publication date
ITTO991035A1 (en) 2001-05-26
IT1310740B1 (en) 2002-02-22
ITTO991035A0 (en) 1999-11-26
AU1523101A (en) 2001-06-04

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