Unlock mechanism for a rotary door operator

Details Unlock mechanism for a rotary door operator Unlock mechanism for a rotary door operator

2007-05-01

2007-05-01

Strimbu, Gregory J. (Department: 3634)

Movable or removable closures

Mounted for multidirectional or oblique movement

Sequential translation and swinging

C049S280000, C049S281000

Reexamination Certificate

active

10744038

ABSTRACT:
An unlock mechanism for a rotary door operator of a transit vehicle includes a pivotally disposed unlock member adapted for rotating a lock member into an unlock position and activating a valve for discharging the fluid pressure from the drive cylinder to enable manual opening of the door. A spring is provided for biasing the unlock member to a non-activated position. The unlock member may be activated either with a cable or a lever handle. A lock sensing switch provides a feedback on the lock condition to the transit vehicle control system. Additionally, a guiding bracket is provided for securing the cable in proximity of the unlock member.

REFERENCES:
patent: 4087939 (1978-05-01), Elguindy et al.
patent: 4545149 (1985-10-01), Jentsch
patent: 4833827 (1989-05-01), Bode et al.
patent: 4854223 (1989-08-01), Fink
patent: 6948765 (2005-09-01), Tong et al.
patent: 7017974 (2006-03-01), Tong et al.
patent: 34 00 753 (1984-08-01), None
patent: 2 014 231 (1979-08-01), None

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