A lift lock mechanism for releasably locking a manhole cover, the lift lock mechanism comprising a latch bolt provided relative to an underside of the cover, a lock body provided relative to a wall of the in-ground chamber and a latch member 13 provided relative to the lock body and movable between a latched position in which the latch bolt is captive and a free position in which the latch bolt is removable from the latch member. A locking member 14 is provided relative to the lock body and movable between a locking position to lock the latch member in the latched position and a released position in which the latch member is movable to the free position. The lift lock mechanism further comprises a threaded locking pin associated with the locking member to force the locking member into the locking position when tightened and to contemporaneously release the locking member from the locking position and lift the cover when loosened.
A lift lock mechanism
26.10.2022
Patent
Elektronische Ressource
Englisch
Mechanical door-opening lift car lock safety mechanism
Europäisches Patentamt | 2015
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