Automatic door closer

Details Automatic door closer Automatic door closer

1977-02-28

1978-01-10

Feldbaum, Ronald

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Closers

Spring and lever

16 51, 16 82, 16 84, E05F 108

Patent

active

040670848

ABSTRACT:
An automatic door closer includes a closer shaft to which the door to be closed is connected for turning movement therewith about the axis thereof, and spring means biasing said closure shaft to a position in which the door is closed. The door closer includes further means for releasably holding the closer shaft and the door connected thereto in any adjusted position when the door is opened beyond a predetermined angle.

REFERENCES:
patent: 2899702 (1959-08-01), Voster et al.
patent: 3273196 (1966-09-01), Voster et al.
patent: 3561036 (1971-02-01), Crane
patent: 3584331 (1971-06-01), Hooge
patent: 3618160 (1971-11-01), Ellis
patent: 3760455 (1973-09-01), Berry et al.
patent: 3818637 (1974-06-01), Vivier

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