Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Pneumatic
Patent
1992-09-28
1994-03-15
Bradley, Paula A.
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Checks and closers
Pneumatic
16 84, E05F 300
Patent
active
052936660
ABSTRACT:
Apparatus including a suction mechanism for holding open a door or similar member for a predetermined time period, whereupon the door is automatically released and is able to return to its closed position. The period of time during which the suction mechanism is active may be determined by means of an adjustable air leakage to the suction mechanism. The entire mechanism is attached to the inner surface of the door and the necessary relative motion of parts achieved by a connecting rod attached to the adjacent door jam. Spring or equivalent means are provided to protect the door and apparatus against overload by accidental movement of the door when firmly held open.
REFERENCES:
patent: 478371 (1892-07-01), Shaw
patent: 478372 (1892-07-01), Shaw
patent: 478388 (1892-07-01), Wright
patent: 1175548 (1914-11-01), Bouchery
patent: 1621974 (1927-03-01), Deenihan
patent: 1834163 (1931-12-01), Lasier et al.
patent: 2117013 (1938-05-01), Bernhard
patent: 2522252 (1950-09-01), Billeter
patent: 2585413 (1952-02-01), Simpson
patent: 2964779 (1960-12-01), Gohr
patent: 3016563 (1962-01-01), de Jong
patent: 3042958 (1962-07-01), Spears
patent: 3212122 (1965-10-01), Flint
patent: 3562850 (1971-02-01), Eliason et al.
patent: 3863568 (1975-02-01), Frederick
patent: 3909877 (1975-10-01), Christy et al.
patent: 4053961 (1977-10-01), Wilson et al.
patent: 4483044 (1984-11-01), Johnston et al.
patent: 4505502 (1985-03-01), Tomita
patent: 4506407 (1985-03-01), Downey
patent: 4536916 (1985-08-01), Storandt et al.
patent: 4759099 (1988-07-01), Morano et al.
Bradley Paula A.
Mah Chuck Y.
Whelan John T.
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