Patent ID: 9157256
Filing Date: 2015-10-13
Classification: E05B,Y10T

Abstract:
1. A lock system comprising: a lock, comprising: a lock housing having a cylindrical cavity for receiving a rotatable lock core, said housing having upon its internal surface a longitudinal slot; a substantially cylindrical lock core arranged within said cavity; said lock core having a keyway formed therein and extending longitudinally from an end face of said lock core; said lock core further including a plurality of guide bores which extend outwardly from said keyway and communicate therewith; each guide bore receiving a respective locking pin; wherein coding on a key blade operatively inserted into said keyway causes each locking pin to move along the respective guide bore; said lock core further including a recess extending outwardly from said plurality of guide bores and communicating therewith; said recess receiving a sidebar; said lock core further including a channel, said channel including an opening which communicates with said recess, and a sidebar blocking member slideably received in said channel; a face plate arranged to be positioned at the end face of said lock core, the face plate including a keyway cutout which aligns with said keyway, said face plate further including an additional cutout portion, wherein said additional cutout portion is located adjacent the keyway cutout and is selectably positioned at one of a plurality of heights relative to the height of the keyway cutout; each locking pin further comprising a hole, the position of the hole along the locking pin defining a locking combination for the respective locking pin; said sidebar further comprising protrusions which are directed inwardly towards said guide bores, said sidebar being biased outwardly away from said side bores and into said longitudinal slot; said sidebar further comprising a blockable portion which is arranged to protrude through said opening; said sidebar blocking member further comprising a notch; wherein said sidebar blocking member is biased towards a position in which said notch is not aligned with said opening, in which position said sidebar blocking member presents a barrier to said blockable portion and prevents said sidebar from moving inwardly towards said guide bores; said sidebar blocking member further includes an engagement portion which extends from an end of said sidebar blocking member and is formed at one of a plurality of selectable heights with respect to the end of said sidebar blocking member, each of said plurality of selectable heights of said engagement portion corresponding to a respective one of said plurality of heights of said additional cutout portion on said face plate, wherein the engagement portion is exposed to contact via said additional cutout portion when the selected heights of said engagement portion and said additional cutout portion correspond; said system further including: a key including a key handle and a key blade extending therefrom; said key blade having coded bittings, wherein upon insertion of said key blade into said keyway, correctly coded bittings move the locking pins along the guide bores until the holes are aligned with said recess; said key further including an unblocking member, which unblocking member operatively protrudes from said key handle substantially parallel to and adjacent a side of said key blade, wherein said unblocking member is selectively positioned at one of a plurality of heights relative to the height of said key blade, each of said plurality of heights corresponding respectively to one of said plurality of heights of said additional cutout portion on said face plate; wherein operatively, during key blade insertion into said keyway, said unblocking member, being positioned at a selected height corresponding with the selected height of the additional cutout portion, engages said exposed engagement portion and moves said sidebar blocking member to an unblocking position in which said notch is aligned with said opening, in which unblocking position said sidebar blocking member presents no barrier to said blockable portion; wherein turning the inserted key causes the lock core to attempt to rotate, causing the unblocked sidebar to move inwardly against its bias and the inwardly directed protrusions enter the aligned holes, whereby the unblocked sidebar is capable of moving out of the longitudinal slot, thereby allowing the lock core to rotate.