Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closers
Patent
1995-10-25
1997-05-20
Mah, Chuck Y.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Closers
16 49, 16 66, 16 82, 16DIG10, E05F 100, E05F 502
Patent
active
056302487
ABSTRACT:
A door closer employing a cylinder having an end attachable to a door or door frame and slidably retaining a piston biased by a spring to a maximum retracted position in the cylinder. One end of a rod is attached to the piston and the other end extends from the cylinder and is attachable to a door frame or door. Confined to a short longitudinal space in the cylinder and riding on the rod, is a cantable washer. Structural members at the ends of the washer space in the cylinder maintain the washer in an essentially perpendicular orientation on the rod so that it may slide through the washer freely as the door is opened or closed. A positionable support, longitudinally buttressed from the cylinder, is introducible into the washer space so that the support may contact the washer on initiation of retraction of the rod into the cylinder causing the washer to cant, arrest the piston rod, and hold the door open. To unlatch the door, the positionable support is withdrawn to avoid canting contact with the washer. Several embodiments of the invention vary the elements of the positionable support.
REFERENCES:
patent: 3105264 (1963-10-01), Truhon
patent: 3284841 (1966-11-01), Patriquin
patent: 4194264 (1980-03-01), Stoffregen
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), Gueriu
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