LOCK ASSEMBLIES

摘要

A lock assembly for securing against unauthorised rotation a hand-wheel of a mechanism such as a fluid flow control valve has a lock mechanism with relatively rotatable first and second parts (22, 23) and which can be secured against relative rotation by the locking action of the lock mechanism. A clamp (17, 18) may be secured to a fixed part (11) of the valve without the need to make structural alternations to the valve and the first part (22) of the lock mechanism is arranged to be mounted on the side of the hand-wheel remote from the valve body. A rigid link (32) extends over the edge of the hand-wheel (13) and interconnects the clamp and the second part (23) of the lock mechanism so that when the two parts are secured against relative rotation, the hand-wheel cannot be turned. The effective diameter of the hand-wheel may be reduced to facilitate interconnection of the clamp and the second part of the lock mechanism in which case the first part may be provided with an auxiliary operating member.