Control for a door closer having a power-assist opening feature

Details Control for a door closer having a power-assist opening feature Control for a door closer having a power-assist opening feature

1992-06-29

1993-10-12

Cuomo, Peter M.

Movable or removable closures

Initial manual displacement energizes motor drive; e.g.,...

49340, 16 58, E05F 1510

Patent

active

052514005

ABSTRACT:
A control for a power-assist feature for an hydraulic closer is driven by structure mounted on the pinion shaft of the closer. It includes a pump-activating arm slidably mounted on the shaft, the end of the arm adapted to cover a pump-on sensor when the door is `bumped`. It also includes a follower rotatably mounted near the pinion and engageable escapement-fashion by a wheel in friction fit on the pinion shaft, the follower carrying a pump-deactivating arm, the end of the latter arm adapted to move away from a pump-off sensor when the door opens to its preset limit.

REFERENCES:
patent: 2409300 (1946-10-01), Miles
patent: 3470653 (1969-10-01), Kalog
patent: 3497997 (1970-03-01), Sheckells
patent: 3831458 (1974-08-01), Takanashi et al.
patent: 3874117 (1975-04-01), Boehm
patent: 3936977 (1976-02-01), Runft et al.
patent: 3948000 (1976-09-01), Pedersen
patent: 4429490 (1984-02-01), Zunkel
patent: 4501090 (1985-02-01), Yoshida et al.
patent: 4995194 (1991-02-01), Schultze et al.
patent: 5165295 (1992-11-01), Dohnal et al.

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