Door operating mechanism

Details Door operating mechanism Door operating mechanism

1977-06-02

1979-01-30

Valenza, Joseph E.

Conveyors: power-driven

Conveyor frame or casing

Adjustable conveyor frame or casing

198735, 198671, 49104, 49332, 222506, 222558, B65G 1560

Patent

active

041367693

ABSTRACT:
A mechanism for opening and shutting hinged doors, having special utility for discharge doors on silage elevators remotely operable by control ropes, which mechanism is firmly held in both open or closed position by gravity force holding the mechanism against a stop element which employ a door operating pulley, to one side of which is attached a control arm to open and close the door. The pulley is caused to rotate slightly past the point where said control arm is at its uppermost position when the door is opened and lowermost position when the door is closed and the stop means on said pulley prevents further rotation so that the door is held both open and shut by the force of gravity thereon.

REFERENCES:
patent: 1044388 (1912-11-01), Homer
patent: 1625250 (1927-04-01), Ferguson
patent: 1902675 (1933-03-01), Strevn
patent: 2501743 (1950-03-01), Schellentrager
patent: 3275125 (1966-09-01), Prentice
patent: 3333573 (1967-08-01), Wotring
patent: 3774751 (1973-11-01), Bakker
patent: 4058199 (1977-11-01), Schlagel

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