GB2581591A - A lock cylinder for a locking mechanism - Google Patents

A lock cylinder for a locking mechanism Download PDF

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Publication number
GB2581591A
GB2581591A GB2003695.0A GB202003695A GB2581591A GB 2581591 A GB2581591 A GB 2581591A GB 202003695 A GB202003695 A GB 202003695A GB 2581591 A GB2581591 A GB 2581591A
Authority
GB
United Kingdom
Prior art keywords
cam
lock cylinder
engagement
clutch member
spring
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.)
Granted
Application number
GB2003695.0A
Other versions
GB2581591B (en
GB202003695D0 (en
Inventor
Jennings David
Mcloughlin John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UAP Ltd
Original Assignee
UAP Ltd
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 UAP Ltd filed Critical UAP Ltd
Publication of GB202003695D0 publication Critical patent/GB202003695D0/en
Publication of GB2581591A publication Critical patent/GB2581591A/en
Application granted granted Critical
Publication of GB2581591B publication Critical patent/GB2581591B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B9/00—Lock casings or latch-mechanism casings ; Fastening locks or fasteners or parts thereof to the wing
    • E05B9/04—Casings of cylinder locks
    • E05B9/041—Double cylinder locks
    • 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
    • E05B15/04—Spring arrangements in locks
    • 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
    • E05B17/0062—Fraction or shear lines; Slip-clutches, resilient parts or the like for preventing damage when forced or slammed with destructive disengagement
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/20—Means independent of the locking mechanism for preventing unauthorised opening, e.g. for securing the bolt in the fastening position
    • E05B17/2084—Means to prevent forced opening by attack, tampering or jimmying
    • E05B17/2092—Means responsive to tampering or attack providing additional locking
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B9/00—Lock casings or latch-mechanism casings ; Fastening locks or fasteners or parts thereof to the wing
    • E05B9/10—Coupling devices for the two halves of double cylinder locks, e.g. devices for coupling the rotor with the locking cam
    • E05B9/105—Coupling devices for the two halves of double cylinder locks, e.g. devices for coupling the rotor with the locking cam including disengagement means, e.g. opening from one side being still possible even if the key is inserted from the other side

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Lock And Its Accessories (AREA)

Abstract

A lock cylinder, in particular a euro-lock cylinder, is provided for a locking mechanism for doors and other similar closures. The lock cylinder comprising a casing (1) defining a longitudinal axis with a rotatably mounted cam (4) comprising a radially projecting lever (5) that is adapted to actuate the locking mechanism on rotation of the cam (4). First and second cores (6, 7) are rotatably mounted within the casing (1) on either side of the cam (4) respectively. A clutch arrangement is located between the first and second cores (6, 7) and comprises first and second clutch members (16, 17) for placing either the first or the second core (6, 7) into engagement with the cam (4) by movement along a longitudinal axis of the lock cylinder against the force of a biasing means (18, 19). First and second spring-loaded engagement mechanisms (23, 24, 25; 32, 33, 34) are acted on respectively by the first and second clutch members (16, 17) and are adapted to releasably connect either the first or the second clutch member (16, 17) and thereby the first or the second core (6, 7) to the cam dependent on which of said first and second cores (6, 7) is engaged by a user The connection of one of the first and second engagement mechanisms (23, 24, 25; 32, 33, 34) to the cam (4) releases the other of the first and second engagement mechanisms (23, 24, 25; 32, 33, 34) from such connection. The second clutch member (17) is adapted to move the second engagement mechanism (23, 24, 25; 32, 33, 34) into a position wherein it locks into engagement with the cam (4) if the casing (1) is broken and the first core (6) removed.

Claims (18)

1. 1. A lock cylinder for a locking mechanism, the lock cylinder comprising a casing defining a longitudinal axis; a rotatably mounted cam comprising a radially projecting lever that is adapted to actuate the locking mechanism on rotation of the cam; first and second cores rotatably mounted within the casing on either side of the cam respectively; a clutch arrangement located between the first and second cores and comprising first and second clutch members for placing either the first or the second core into engagement with the cam by movement along a longitudinal axis of the lock cylinder against the force of a biasing means; and first and second spring-loaded engagement mechanisms that are acted on respectively by the first and second clutch members and that are adapted to releasably connect either the first or the second clutch member and thereby the first or the second core to the cam dependent on which of said first and second cores is engaged by a user, connection of one of the first and second engagement mechanisms to the cam releasing the other of the first and second engagement mechanisms from such connection; and wherein the second clutch member is adapted to move the second engagement mechanism into a position wherein it locks into engagement with the cam if the casing is broken and the first core removed.
2. A lock cylinder as claimed in Claim 1, wherein locking of the second engagement mechanism to the cam locks the second core to the cam but leaves the second clutch member capable of movement along the longitudinal axis of the lock cylinder.
3. A lock cylinder as claimed in Claim 1 or Claim 2, wherein the first and second spring-loaded engagement mechanisms each comprise a spring that retains the engagement mechanism in a neutral but releasably connected position with respect to the cam when the first and second cores are not engaged by a user.
4. A lock cylinder as claimed in any of Claims 1 to 3, wherein the inner ends of the clutch members abut one another whereby movement of one of the clutch members inwardly of the cam by engagement of its adjacent core by a user moves the other of the clutch members outwardly of the cam against the force of the biasing means that returns the clutch members back to their initial position when neither of the cores is engaged by a user.
5. A lock cylinder as claimed in any of Claims 1 to 4, wherein each engagement mechanism is connected to the cam by movement radially outwards of its respective clutch mechanism against the bias of its spring-loading into an adjacent aperture defined by the cam such that subsequent rotation of the engagement mechanism by its respective clutch member also rotates the cam.
6. A lock cylinder as claimed in Claim 5, wherein each clutch member is located in a cavity formed at the inner end of its respective core and those parts of the engagement mechanisms that lock into engagement with the cam are located in apertures in their respective cores that are adjacent to said apertures in the cam when the lock is in a neutral position .
7. A lock cylinder as claimed in Claim 5 or Claim 6, wherein each aperture in the cam into which each of the second engagement mechanisms is moved is provided with a lip or a flange that prevents the engagement mechanism from being retracted back into its respective clutch member when it is locked into engagement with the cam.
8. A lock cylinder as claimed in any of Claims 5 to 7, when dependent on Claim 4, wherein the first and second clutch members each define at least one angled face that defines an acute angle with respect to the longitudinal axis of the lock cylinder, said angled faces being mirror images of one another and bearing against a respective adjacent part of the first or the second engagement mechanism such that one of the engagement mechanisms is pushed radially outwards by the angled face of its clutch member while at the same time the other of the engagement mechanisms is pulled radially inwards by its spring loading as the angled face of its clutch member is moved away from it.
9. A lock cylinder as claimed in Claim 8, wherein the first and second clutch members each define two angled faces that defines an acute angle with respect to the longitudinal axis of the lock cylinder, said angled faces defining positive and negative angles with respect to the longitudinal axis, and the first and second engagement mechanisms each comprise a pair of spring-loaded engagement members located on opposite sides of the clutch member that are moved radially outwards away from one another to be releasably connected to the cam by the respective angled faces of the clutch member against the force of their spring loading when said clutch member acts on its respective engagement mechanism .
10. A lock cylinder as claimed in any of Claims 1 to 9, wherein each clutch member defines a cavity therethrough that accommodates part of its respective engagement mechanism.
11. A lock cylinder as clamed in Claim 10 when dependent on Claim 8 or Claim 9, wherein the angled face or faces of each clutch member are defined by an interior wall of said cavity.
12. A lock cylinder as claimed in any of Claims 1 to 11, wherein each engagement mechanism comprises at least one locking spring that is a torsion spring with a coiling portion and an anchoring portion, the coiling portion being acted one by its respective clutch member to releasably connect it to the cam.
13. A lock cylinder as claimed in Claim 12, wherein the coiling portions of the first and second locking springs are located between the respective ends of the first and second cores and an internal projection within the cam.
14. A lock cylinder as claimed in Claim 12 or Claim 13, wherein the anchoring portion comprises a leg with an angled foot.
15. A lock cylinder as claimed in Claim 14, wherein the leg of each locking spring is located between an adjacent first or second core and an inner wall of the cam .
16. A lock cylinder as claimed in Claim 14 or Claim 15, wherein the angled foot bears against one side of a circlip that is provided to prevent movement of the adjacent first or second core along said longitudinal axis.
17. A lock cylinder as claimed in any of Claims 1 to 11, wherein each engagement mechanism comprises a spring bar, a tension spring connected thereto and a drive member that is acted on by its respective clutch member to releasably connect the spring bar to the cam.
18. A lock cylinder as claimed in Claim 17 when dependent on Claim 8, wherein each engagement mechanism comprises two spring bars that are connected by the tension spring and that are respectively acted on by two drive members each of which is acted on by one of the angled faces of its clutch member.
GB2003695.0A 2017-11-17 2018-11-05 A lock cylinder for a locking mechanism Active GB2581591B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1719038.0A GB201719038D0 (en) 2017-11-17 2017-11-17 A lock cylinder for a locking mechanism
PCT/EP2018/025278 WO2019096442A1 (en) 2017-11-17 2018-11-05 A lock cylinder for a locking mechanism

Publications (3)

Publication Number Publication Date
GB202003695D0 GB202003695D0 (en) 2020-04-29
GB2581591A true GB2581591A (en) 2020-08-26
GB2581591B GB2581591B (en) 2022-08-31

Family

ID=60805801

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB1719038.0A Ceased GB201719038D0 (en) 2017-11-17 2017-11-17 A lock cylinder for a locking mechanism
GB2003695.0A Active GB2581591B (en) 2017-11-17 2018-11-05 A lock cylinder for a locking mechanism

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB1719038.0A Ceased GB201719038D0 (en) 2017-11-17 2017-11-17 A lock cylinder for a locking mechanism

Country Status (2)

Country Link
GB (2) GB201719038D0 (en)
WO (1) WO2019096442A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB202210454D0 (en) * 2022-07-15 2022-08-31 Osullivan Mark Cylinder lock

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011051703A2 (en) * 2009-10-26 2011-05-05 Avocet Hardware Limited Lock mechanism
CN102877696A (en) * 2012-10-17 2013-01-16 徐钜祥 Improved door lock mechanism
GB2518496A (en) * 2013-07-17 2015-03-25 K I J Security Locks Ltd A lock
GB2531900A (en) * 2014-09-06 2016-05-04 Xu Juxiang Lock cylinder mechanism capable of preventing violent damage
GB2549193A (en) * 2016-03-11 2017-10-11 K I J Security Locks Ltd A lock

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011051703A2 (en) * 2009-10-26 2011-05-05 Avocet Hardware Limited Lock mechanism
CN102877696A (en) * 2012-10-17 2013-01-16 徐钜祥 Improved door lock mechanism
GB2518496A (en) * 2013-07-17 2015-03-25 K I J Security Locks Ltd A lock
GB2531900A (en) * 2014-09-06 2016-05-04 Xu Juxiang Lock cylinder mechanism capable of preventing violent damage
GB2549193A (en) * 2016-03-11 2017-10-11 K I J Security Locks Ltd A lock

Also Published As

Publication number Publication date
GB2581591B (en) 2022-08-31
GB202003695D0 (en) 2020-04-29
GB201719038D0 (en) 2018-01-03
WO2019096442A1 (en) 2019-05-23

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