Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Liquid
Patent
1978-08-11
1981-08-25
Husar, C. J.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Checks and closers
Liquid
16 58, 16 66, 16DIG9, 16DIG21, 13753311, E05F 310
Patent
active
042850940
ABSTRACT:
A door closing apparatus includes a housing member defining a cylinder for receiving a reciprocable piston member. The housing also defines an opening for receiving a rotatable pinion meshing with teeth on the piston. The apparatus also includes a linkage assembly for operatively connecting the door closing apparatus between a door and a door frame. This linkage includes a drive member for rotating the pinion bidirectionally in response to respective opening and closing of the door. An adjustable biasing assembly is provided for urging the piston in a predetermined direction within the housing cylinder, and the housing is sealed to receive a predetermined amount of oil or other fluid for hydraulically regulating the piston motion. To achieve this regulation, the housing includes an arrangement of interconnected fluid carrying channels and one or more valve members are mounted in cooperation with the channels. Advantageously the valve members cooperate with the channels to provide an adjustable variable control over the reciprocal movement of the piston, as, for example, to adjust the close rate and latch rate of the associated door. In a preferred embodiment, a hold open assembly is provided and comprises a holding member joined for rotation with the pinion and a stop member for releasably engaging the holding member to hold the door open.
REFERENCES:
patent: 2476434 (1949-07-01), Spang
patent: 2723416 (1955-11-01), Schlage
patent: 2772439 (1956-12-01), Flint
patent: 2809659 (1957-10-01), Gillespie et al.
patent: 2829395 (1958-04-01), Schlage
patent: 2942291 (1960-06-01), Flint
patent: 3028619 (1962-04-01), Schlage et al.
patent: 3182348 (1965-05-01), Wells
patent: 3714677 (1973-02-01), Schmid
patent: 3877108 (1975-04-01), Del Fiacco
patent: 4197875 (1980-04-01), Schieferstein et al.
Cohen Moshe I.
Husar C. J.
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