Patent ID: 11905734
Assignee: SURELOCK MCGILL LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 22:
23. A bolt module comprising:
a bolt moveable between a thrown position, a partially retracted position and a retracted position;
a first rotor assembly capable of accepting a drive element, the first rotor assembly arranged to drive the bolt between the thrown position, the partially retracted position and the retracted position; and
a bolt restraint latch and trigger, the bolt restraint latch configured to operate on the bolt and engage with the bolt when the bolt is moved to a retracted position, or a partially retracted position, so as to restrain the bolt in that position, and the trigger extending from the bolt module and arranged such that on striking of the trigger the trigger pushes against the bolt restraint latch releasing the bolt, wherein the restraint latch comprises a plurality of restraint fingers configured to operate on the bolt and engage with the bolt, each of the fingers configured come into engagement with the bolt at different retraction positions of the bolt to restrain the bolt in that position.