Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Liquid
Patent
1994-08-11
1996-04-02
Bray, W. Donald
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Checks and closers
Liquid
16 52, 16DIG9, E05F 304, E05F 310
Patent
active
055028748
ABSTRACT:
A valve for regulating speed of operation of a door closer, includes an elongated hollow tubular body having a closed first end with driving provisions thereon, an open second end, and an orifice in its sidewall adjacent its closed first end; an endplug for a cylinder bore of the door closer, the endplug having an axial port in which the closed first end of the tubular body is rotatably supported and which provides a fluid tight seal about the outer surface of the tubular body; an annular valve seat adjacent the endplug, the seat being fixed against rotation, and having an open portion and a closed portion which provide varying degrees of occlusion of the orifice when the tubular body is rotated; and a seal plate check valve captured against a piston head and occluding an opening therein during closing, the plate also providing a seal about the outer surface of the tubular body near the open second end thereof.
REFERENCES:
patent: 3852846 (1974-12-01), Slaybaugh
patent: 4234996 (1980-11-01), Jentsch
patent: 4256293 (1981-03-01), Burgess
patent: 4267619 (1981-05-01), Suska
patent: 4285094 (1981-08-01), Levings, Jr.
patent: 4386446 (1983-07-01), Zunkel et al.
Bray W. Donald
Palermo Robert F.
Schlage Lock Company
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