Movable or removable closures – Closures interconnected for concurrent movement – Closures mounted for swinging
Patent
1981-04-23
1983-03-01
Downey, Kenneth
Movable or removable closures
Closures interconnected for concurrent movement
Closures mounted for swinging
49110, 49141, E05C 706
Patent
active
043751407
ABSTRACT:
What is disclosed is a door opener for a bus and the like having a pair of doors pivotally mounted on each side of a door opening on respective door shafts characterized by respective door bell cranks connected with the door shaft so as to effect desired rotation thereof; a central bell crank journalled for pivotal movement for opening the doors; and a pair of respective linking arms connected respectively with the central bell crank and with respective door bell cranks, at least one of the linking arms including respective telescoping members and biasing means for maintaining a noise-abating force on the doors; motor and interconnection mechanism for effecting controlled pivotal rotation of the central bell crank for opening the doors and for closing the doors and a safety override for disengaging the motor to allow the doors to be opened manually in the event of an emergency. Also disclosed is the respective preferred embodiment.
REFERENCES:
patent: 1806203 (1931-05-01), Huston
patent: 2173475 (1939-09-01), Forman
patent: 2789813 (1957-04-01), Runkle
patent: 2893506 (1959-07-01), Daugirdas
patent: 3793773 (1974-02-01), Sheckells
Blair William F.
Downey Patrick
Downey Kenneth
Excell Machine Company, Inc.
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