Door opener and closer

Details Door opener and closer Door opener and closer

1997-04-25

2000-10-31

Redman, Jerry

Movable or removable closures

With operator for movably mounted closure

Drive within closure housing

49340, E05F 1124

Patent

active

061384127

ABSTRACT:
A door opener and closer that provides motive power for opening and closing a door. A double acting cylinder pivotally mounted on the door is coupled to a roller arm. A roller on the roller arm is captive within a cage mounted to the door frame. The cylinder applies a force on the roller arm in one direction to open the door and in the opposite direction to close the door. The components are mounted in a manner such that none of the components project into the door opening. The door opener and closer eliminates the need for a separate closer. The door may be opened manually with minimum resistance.

REFERENCES:
patent: 1314023 (1919-08-01), Spencer
patent: 3269061 (1966-08-01), Massina
patent: 3864875 (1975-02-01), Hewitt
patent: 4365442 (1982-12-01), Speer
patent: 4735018 (1988-04-01), Duncan et al.
patent: 5392562 (1995-02-01), Carambula

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