AU2011201272B2 - Cylinder lock extension - Google Patents

Abstract

This invention relates to a cylinder lock assembly (1) including a primary housing (2) and a primary barrel (3) which accommodate tumblers (8) for controlling 5 rotation of the primary barrel (3) relative to the primary housing (2). The assembly (1) also includes an additional housing (4) for housing an additional barrel (15) to which a cam (19) is attached. The lock assembly (1) may include one or more additional housings (4) for extending the length of a cylinder lock assembly to allow for doors of varying fitness. ((D

Description

1 P/00/011 Regulation 3.2 AUSTRALIA Patents Act 1990 ORIGINAL COMPLETE SPECIFICATION STANDARD PATENT Invention Title: CYLINDER LOCK EXTENSION Applicant: ASSA ABLOY Australia Pty Limited The following statement is a full description of this invention, including the best method of performing it known to me: 6087 DG 2 CYLINDER LOCK EXTENSION This invention relates to a cylinder lock assembly. The cylinder lock assembly has been designed to allow for variation in the length between the front face of the 5 cylinder lock assembly and the cam at the rear of the cylinder lock assembly. One application of the cylinder lock assembly is in conjunction with a mortice lock assembly and accommodating doors of a range of thicknesses. It will be convenient to hereinafter describe the invention with reference to the application with mortice lock assemblies, however it is to be appreciated that the cylinder lock assembly has other 10 applications beyond mortice lock assemblies. A cylinder lock includes a housing and a barrel accommodated within the housing. A detainer is also included, often in the form of a set of tumblers extending across a shear line between the housing and barrel to resist rotation of the barrel relative to the housing. A key is used to adjust the position of the tumblers relative to 15 the shear line so as to allow the barrel to rotate. A cam is located at a rear of the barrel that when the cylinder lock is installed, the cam interacts with elements of the mortice lock. The purpose of the interaction may, for example, result in retraction of the mortice lock latch bolt or locking of the handle hubs. A mortice lock assembly is designed for location in a mortice cavity formed 20 through a side edge of the door. The cylinder lock is located in apertures formed in the inner and outer face of the door that extend to the mortice cavity. It is generally desirable that the front face of the cylinder lock is relatively flush with the face of the door, or a furniture plate mounted on the inner and outer face of the door. Naturally the length that the cylinder lock needs to be so that the cam can interact with the 25 elements of the mortice lock, while being flush with the face of the door or furniture plate, will depend upon the thickness of the door. Locksmiths have generally retained an inventory of cylinder locks of a range of lengths to accommodate doors of a range of thicknesses. Maintaining an inventory of such as size is not particularly cost effective when the majority of doors are limited to 30 a small range of thickness. C:\1ote0mp\SPEC-909681 doc 3 A reference herein to a patent document or other matter which is given as prior art is not to be taken as an admission that that document or matter was, in Australia, known or that the information it contains was part of the common general knowledge as at the priority date of any of the claims. 5 According to one aspect of this invention there is provided a cylinder lock assembly for use with a mortice lock including a primary housing accommodating a primary barrel, the primary housing and primary barrel being configured to accommodate tumblers to control rotation of the primary barrel relative to the primary 10 housing, the primary housing and primary barrel being the only housing and barrel accommodating tumblers, at least one additional housing accommodating an additional barrel, the additional housing fastened to the primary housing, the primary barrel interacts with the additional barrel such that rotation of the primary barrel results in rotation of the additional barrel, a cam detachably fastened to an end of the 15 additional barrel remote from the primary barrel for interaction with the mortice lock assembly which detachably fastens the additional barrel to the additional housing. It is preferred that the additional cylinder housing is fastened to the primary cylinder housing using at least one fastener. The additional cylinder housing preferably 20 includes at least one bore to accommodate the at least one fastener. It is preferred that the at least one bore in the additional cylinder housing extends in a longitudinal direction of the additional cylinder housing. It is also preferred that the primary cylinder housing includes at least one bore to accommodate the at least one fastener. The at least one bore preferably extends in a longitudinal direction of the primary 25 cylinder housing. It is preferred that the cam is detachably fastened to the additional barrel by at least one fastener member passing through the cam and into the additional barrel. It is preferred that the additional barrel includes at least bore extending the longitudinal 30 direction of the additional cylinder housing to accommodate the at least one fastener. It is preferred that the additional cylinder housing includes an aperture extending substantially perpendicular to the longitudinal direction for accommodating a fastener for fastening the additional cylinder housing to the mortice lock.

4 It is preferred that the additional cylinder housing includes a bore extending in the longitudinal direction for releasably accommodating the additional barrel. It is further preferred that each bore accommodating the barrel includes a constriction adjacent an end of the bore which interacts with a shoulder formed on the barrel to 5 limit movement in the longitudinal direction. It is preferred that the cam is shaped relative to the bore to limit movement of the barrel in the longitudinal direction. It is further preferred that the primary barrel and the additional barrel each include a formation at their adjacent end surfaces for 10 facilitating a driving interaction with one another, either directly or indirectly. It is further preferred to include a transmission member to act between the primary barrel and the additional barrel to transfer rotational movement of the primary barrel to the additional barrel. The transmission member is preferably in the shape of the cam that in use interacts with the mortice lock assembly. It is preferred that each transmission 15 member is attached to either the primary barrel or the additional barrel by at least one fastener. It is further preferred that the primary barrel and the additional barrel each include an end surface formation for facilitating engagement with the transmission member. It is further preferred that the additional cylinder housing includes a sleeve portion which fits over a portion of the primary cylinder housing. 20 It is also preferred to include a plurality of additional cylinder housings each accommodating an additional barrel with a transmission member between each adjacent additional barrel. 25 It is also preferred to include a keyway in the primary barrel accessible from a front face of the cylinder lock assembly, with the cam forming part of a rear face of the cylinder lock assembly. It will be convenient to hereinafter describe in greater detail various preferred embodiments of the cylinder lock assembly according to the invention, with reference 30 to the accompanying drawings. The particularity of the drawings and the related detailed description is not to be understood as superseding the generality of the preceding broad definition of the invention. SPEC-909681.do 5 Figure 1 illustrates an isometric view of an assembled cylinder lock assembly according to one embodiment of the invention. Figure 2 is an isometric view of the cylinder lock assembly from Figure 1 in an exploded view. 5 Figure 3 is an isometric view of a further preferred embodiment of the cylinder lock assembly in an exploded view. Referring now to Figure 1 which illustrates a cylinder lock assembly 1 in an assembled form. The cylinder lock assembly 1 illustrated includes a primary housing 2 which accommodates a primary barrel 3 extending in a longitudinal direction of the 10 cylinder lock assembly 1. An additional housing 4 is illustrated located adjacent a rear face of the primary housing 2. The additional housing is fastened to the primary housing by way of a pair of screws 5 (see Figure 2), which is merely one preferred form of fastening means suitable for fastening the additional housing to the primary housing 2. The additional housing 4 also includes an aperture 6 adjacent the rear face 15 for accommodating a tip of a fastener (not shown), most likely in the form of an elongated pin, when attaching the cylinder lock assembly 1 to a mortice lock assembly (not shown). The additional housing 4 includes a sleeve portion which fits over a rear portion of the primary housing 2. It will be appreciated from figure 1 that the combined length of the primary 20 housing 2 and the additional housing 4 is longer than the length of the primary housing alone. Accordingly the combined length can reach a mortice lock located in a mortice cavity further spaced from the side face of the door. Referring now to Figure 2 which illustrates the cylinder lock assembly 1 from Figure 1 in an exploded form and it can be noted that the primary housing 2 and 25 primary barrel 3 includes a plurality of transverse bores 7 which house pin tumblers 8. It ought to be appreciated that the cylinder look assembly is not limited for use with pin tumblers only. Other forms of detainers such as disc and wafer tumblers or even electro magnetic detainers are also suitable. The pin tumblers 8 locate within the bores 7 that extend substantially perpendicular to the longitudinal direction of the 30 cylinder lock assembly 1. The tumblers interact with transverse bores 7 in the primary barrel 3, when the primary barrel is located in the primary bore 9 in a manner that will C:pOempSPEC-909681.doc 6 be understood by those skilled in the industry. More specifically, it ought to be appreciated that the primary barrel 3 is rotatable relative to the primary housing 2 once an appropriately configured key (not shown) is located in the key way 10 formed in the primary barrel 3. This key will adjust the position of the tumblers 8 relative to a 5 sheer line between the primary housing 2 and the primary barrel 3 so that the tumblers 8 do not extend across that sheer line. Accordingly, this arrangement may vary depending on the type of tumblers selected. The primary barrel 3 is retained within the primary bore of the primary housing 2 by the connection of a transmission member 11 to a rear face of the primary barrel 10 3, and a shoulder 20 formed on an opposed end of the barrel 3 which engages a constriction 21 in the bore 9. The transmission member 11 is connected to the primary barrel 3 by way of a pair of screws 12 which locate in threaded bores 14 (shown in dotted line), which extend in the axial direction. Naturally other forms of fastening of the transmission member 12 to the primary barrel 3 may be suitable. 15 Furthermore, the primary barrel 3 may be retained within the bore 9 of the primary housing 2 by an arrangement other than the transmission member 12 as hereinbefore described. The rear face (obscured) of the primary barrel 3, and the front face of an additional barrel 15 are preferably formed with formations that facilitate a driving 20 engagement with the transmission member 11. This surface formation may take any suitable form however in the embodiment illustrated each front and rear end surface of the additional barrel includes a groove 16 to receive a projection 17 formed on face of the transmission member 11. It ought to be appreciated that this arrangement of grooves 16 and protrusion 17 facilitates transfer of torque from the primary barrel 3 25 through the transmission member 11 to the additional barrel 15. The additional barrel is inserted into the additional bore 18 in the additional housing through a front face thereof. A member 19 is attached to the rear face of the additional barrel 15 to resist extraction of the additional barrel 15from the additional housing 4, in much the same manner as the primary barrel 3 is retained in the primary 6a housing 2. Furthermore a shoulder 24 is formed on each barrel 15 near the rear face which engages a constriction 25 (see Figure 3 only 2 of 3 constrictions are visible) in the bore 18. The engagement of the shoulder 24 with the constriction 25 limits movement in the longitudinal direction. 5 It ought to be appreciated that where this member 19 is required to interact with features of the mortice lock assembly, it will act as a cam member. It may need to be of a different shape to the one illustrated; in which case its shape may be the same as the transmission member illustrated may be substituted for a member of another shape.

7 The additional housing is attached to the primary housing by the pair of screws 5. The additional housing includes a pair of bores 20 which extend in the longitudinal direction to accommodate the shanks 21 of the screws 5. The ends of the shanks locate in threaded bores 22 formed in the primary housing 2. Clearly the additional 5 housing 4 may be attached to the primary housing 2 in a manner different to that described above. Referring now to Figure 3 which illustrates a further preferred embodiment of the cylinder lock assembly. Like features are given like reference numerals for the first embodiments. The lock assembly illustrated includes two further additional housings 10 4, 4 and barrels 15, 15 which extend the overall length of the cylinder lock assembly in the longitudinal direction. The further additional housings 4, 4 and barrels 15, 15 interact with each other in the same manner as hereinbefore described with reference to the primary and additional housings and barrel. Furthermore the further additional housings and barrels are or different size, so that various combinations can be 15 created to cover a range of door thicknesses. It ought to be appreciated from the foregoing that any number of additional barrels may be introduced into the cylinder lock assembly to vary the overall length of the cylinder lock assembly to accommodate a range of door thicknesses. However, by including a standard sized primary housing and primary barrel to interact with the tumblers, reduces the size of 20 the inventory required to be maintained by the locksmith. Various alterations and/or additions may be introduced to the cylinder lock assembly as hereinbefore described without departing from the spirit or ambit of the invention. Future patent applications may be filed in Australia or overseas on the basis of 25 or claiming priority from the present application. It is to be understood that the following provisional claims are provided by way of example only, and are not intended to limit the scope of what may be claimed in any such future application. Features may be added to or omitted from the provisional claims at a later date so as to further define or re-define the invention. CApN81emp\SPEC-9O68i doc

Claims (21)

1. A cylinder lock assembly for use with a mortice lock including a primary housing accommodating a primary barrel, the primary housing and primary barrel 5 being configured to accommodate tumblers to control rotation of the primary barrel relative to the primary housing, the primary housing and primary barrel being the only housing and barrel accommodating tumblers, at least one additional housing accommodating an additional barrel, the additional housing fastened to the primary housing, the primary barrel interacts with the additional barrel such that rotation of the 10 primary barrel results in rotation of the additional barrel, a cam detachably fastened to an end of the additional barrel remote from the primary barrel for interaction with the mortice lock assembly which detachably fastens the additional barrel to the additional housing. 15

2. A cylinder lock assembly according to claim 1 wherein the additional cylinder housing is fastened to the primary cylinder housing using at least one fastener.

3. A cylinder lock assembly according to claim 2 wherein the additional cylinder housing includes at least one bore to accommodate the at least one fastener. 20

4. A cylinder lock assembly according to claim 3 wherein the at least one bore in the additional cylinder housing extends in a longitudinal direction of the additional cylinder housing. 25

5. A cylinder lock assembly according to claim 2 or 3 wherein the primary cylinder housing includes at least one bore to accommodate the at least one fastener.

6. A cylinder lock assembly according to claim 5 wherein the at least one bore extends in a longitudinal direction of the primary cylinder housing. 30

7. A cylinder lock assembly according to claim 1 wherein the cam is detachably fastened to the additional barrel by at least one fastener member passing through the cam and into the additional barrel. 9

8. A cylinder lock assembly according to claim 7 wherein the additional barrel includes at least bore extending the longitudinal direction of the additional cylinder housing to accommodate the at least one fastener. 5

9. A cylinder lock assembly according to any one of the preceding claims wherein the additional cylinder housing includes an aperture extending substantially perpendicular to the longitudinal direction for accommodating a fastener for fastening the additional cylinder housing to the mortice lock.

10 10. A cylinder lock assembly according to any one of the preceding claims wherein the additional cylinder housing includes a bore extending in the longitudinal direction for releasably accommodating the additional barrel.

11. A cylinder lock assembly according to claim 10 wherein each bore includes a 15 constriction adjacent an end of the bore which interacts with a shoulder formed on the barrel to limit movement in the longitudinal direction.

12. A cylinder lock assembly according to claim 10 or 11 wherein the cam is shaped relative to the bore to limit movement of the barrel in the longitudinal direction. 20

13. A cylinder lock assembly according to any one of the preceding claims wherein the primary barrel and the additional barrel each include a formation at their adjacent end surfaces for facilitating a driving interaction with one another. 25

14. A cylinder lock assembly according to any one of the preceding claims including a transmission member acting between the primary barrel and the additional barrel to transfer rotational movement of the primary barrel to the additional barrel.

15. A cylinder lock assembly according to claim 13 wherein the transmission 30 member is in the shape of the cam that in use interacts with the mortice lock assembly. 10

16. A cylinder lock assembly according to claim 14 or 15 wherein each transmission member is attached to either the primary barrel or the additional barrel by at least one fastener. 5

17. A cylinder lock assembly according to any one of claims 14 to 16 wherein the primary barrel and the additional barrel each include an end surface formation for facilitating engagement with the transmission member. 10

18. A cylinder lock assembly according to any one of the preceding claims wherein the additional cylinder housing includes a sleeve portion which fits over a portion of the primary cylinder housing.

19. A cylinder lock assembly according to any one of the preceding claims 15 including a plurality of additional cylinder housings each accommodating an additional barrel with a transmission member between each adjacent additional barrel.

20. A cylinder lock assembly according to any one of the preceding claims including a keyway in the primary barrel accessible from a front face of the cylinder 20 lock assembly, with the cam forming part of a rear face of the cylinder lock assembly.

21. A cylinder lock assembly substantially as hereinbefore described and illustrated. 25