Patent ID: 6490891
Filing Date: 2002-12-10
Classification: E05B,E05C,Y10T

Abstract:
A draw bolt assembly comprising a housing having an axial passageway formed therein; a bolt slidably mounted in the passageway for movement along the axis thereof, said bolt having at least one spigot extending radially from the bolt; a plurality of annuli aligned along the axis in the passageway, each annulus having an internal slot of a size for receiving passage of the spigot and the plurality of annuli being restrained by the housing; and a resilient means; whereby rotation of the annuli to axially align the slots with the spigot allows movement of the bolt along the passageway, and wherein each annulus comprises a body formed with the internal slot and an associated element bearing a plurality of symbols, at least one of which to be visible on an external surface thereof, to indicate the position of the slot in the associated annulus, the relative orientation of the body and its associated element being adjustable to change the alignment of the slot relative to the symbols, and wherein the slotted bodies of the annuli are coupled for simultaneous axial movement against the resilient means relative the symbol-bearing elements to disengage the bodies from their respective elements for re-orientation, and further comprising a re-coding key mounted on the bolt and adapted to engage an end one of the bodies at one of the normal locked and unlocked positions of the bolt when the slotted bodies are aligned, the bolt being selectively movable beyond its normal said one position to effect movement of the coupled bodies from their respective elements.