Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Marianne Krbec0
Haibo Tong0
Date of Patent
February 2, 2010
0Patent Application Number
117849530
Date Filed
April 10, 2007
0Patent Primary Examiner
Patent abstract
An unlock mechanism for a rotary door operator of a transit vehicle includes a pivotally disposed lock member adapted for rotating into an unlock position and activating a valve for discharging the fluid pressure from a drive cylinder to enable a manual opening of the door. A spring is provided for biasing the lock member into a lock position. The lock member may be moved into the unlock position either with a cable or a lever handle.
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