Movable or removable closures – Operator interrelated with closure latch release – Motor driven
Patent
1975-08-25
1977-07-19
Downey, Kenneth
Movable or removable closures
Operator interrelated with closure latch release
Motor driven
49 26, 49360, E05F 1500
Patent
active
040359565
ABSTRACT:
A driving and locking mechanism which employs pivoted links for coupling and transmitting motion between driving and driven members. During motion, the links are constrained to a particular mutual position for transmission of driving forces, but at one end of the range of movement, the constraint is removed and the links pivot so that one link comes into normal or over-normal contact with an abutment and so locks the driven member in position. Forces on the driven member will not move it (except in the case where the abutment is resilient to allow limited movement of the driven member in the "locked" position) and movement of the driven member can only be accomplished by movement of the driving member. Thus a separate locking or latching mechanism is not required. The mechanism is particularly applicable to sliding doors, such as those of railway vehicles, where the door needs to be locked or latched in the closed position against forces applied to the door to tend to open it.
REFERENCES:
patent: 3352061 (1967-11-01), Chan et al.
patent: 3802125 (1974-04-01), Baker
Downey Kenneth
Westinghouse Brake & Signal Co. Ltd.
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