Door closers with automatic latching or/and delayed action

Details Door closers with automatic latching or/and delayed action Door closers with automatic latching or/and delayed action

1995-11-09

1998-12-01

Mah, Chuck Y.

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

Checks and closers

Liquid

16DIG9, 16DIG17, 16DIG21, 16 49, E05F 304

Patent

active

058422552

ABSTRACT:
The present invention discloses door closers provided with automatic latching in any position along the stroke, and delayed action mechanism together with a mechanism to switch on and off the automatic latching and the delayed action operation modes. The function, on which the automatic latching and the delayed action functions are based, are described in detail and examples of embodiments in door closers provided with either automatic latching or delayed action or both are also described.

REFERENCES:
patent: 3284841 (1966-11-01), Patriquin
patent: 3416182 (1968-12-01), Gibson
patent: 3781943 (1974-01-01), Cain
patent: 3913170 (1975-10-01), Nakane et al.
patent: 4382311 (1983-05-01), Watts
patent: 4815163 (1989-03-01), Simmons
patent: 4894883 (1990-01-01), Fleischhauer
patent: 4920609 (1990-05-01), Lin
patent: 5048150 (1991-09-01), Gueria
patent: 5083342 (1992-01-01), Klinefelter
patent: 5293666 (1994-03-01), Armstrong

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