Lock mechanism
AssigneeSurelock McGill Limited
InventorBernard John Viney
Life of this patent
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Abstract
There is described a lock mechanism for a leaf hinged within a frame, the lock mechanism comprising a first bolt and at least one further bolt, each bolt being movable between an engaged position in which a distal end of the bolt projects from the leaf and a disengaged position, the bolts being directly driveable together between the engaged and disengaged positions by movement of a common drive member, the first bolt having a proximal end engaged by the drive member and isolating means for ensuring that, when pressure is applied to the distal end of the first bolt tending to move it to the disengaged position, the or each further bolt is not moved to the disengaged position.
Claims2
A bolt adapted to fasten two members together, the bolt being further adapted to slide on a surface of a first member from a first configuration to a locked configuration and from the locked configuration to the first configuration, wherein a distal end of the bolt is adapted to project into a second member when the bolt is in the locked configuration;
- the bolt comprising first and second telescopic portions urged apart from one another by a resilient member configured such that pressure on the distal end of the bolt towards a proximal end will cause compression of the resilient member instead of corresponding movement of the proximal end of the bolt;
- the resilient member being contained within a tubular member that forms a part of said first telescopic portion;
- and
- an insert retained in said tubular member, the insert having a through bore in which the second telescopic portion is slidably retained, the resilient member operating between an end of the insert and a facing on the second telescopic portion.
Dependencies are inferred from the claim text.