Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Hinge
Patent
1977-11-18
1978-10-03
Feldbaum, Ronald
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Checks and closers
Hinge
16188, 16189, 16 75, E05F 320, E05F 322
Patent
active
041175670
ABSTRACT:
A door closer comprises: first and second cylinders provided with respective hinge pieces, the cylinders being rotatable with respect to each other about one and the same axis and being in contact with each other in the axial direction thereof; a support shaft inserted into the two cylinders substantially over the entire length thereof, one end portion of the support shaft being non-rotatably secured to the end portion of the second cylinder while the other end portion thereof being rotatably supported in the first cylinder; an intermediate rotary cylinder member provided rotatably with respect to the support shaft and the first cylinder between one end portion of the support shaft and the inner wall of the first cylinder; and a coil spring surrounding substantially the entire length of the support shaft in such a manner that both end portions thereof are non-rotatably secured to the intermediate rotary cylinder member and the lower end portion of the second cylinder, respectively. Grooves are formed at predetermined positions on the inner wall of the upper end portion of the first cylinder, the outer wall of the upper end portion of the support shaft, and the inner wall of the intermediate rotary cylinder member in such a manner that the grooves form two holes as the first and second cylinders are rotated into which two pins are detachably inserted.
REFERENCES:
patent: 217051 (1879-07-01), Bommer
patent: 2493115 (1950-01-01), Diebel
patent: 3825973 (1974-07-01), Gwozdz
patent: 3898708 (1975-08-01), Gwozdz
patent: 3965533 (1976-06-01), Frohlich
Feldbaum Ronald
Nikkey Co., Ltd.
Nissen J. Harold
LandOfFree
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