Hinge apparatus having automatic return function

Details Hinge apparatus having automatic return function Hinge apparatus having automatic return function

2011-06-28

2011-06-28

Mah, Chuck Y. (Department: 3677)

Miscellaneous hardware (e.g., bushing, carpet fastener, caster,

Checks and closers

Liquid

C016S050000, C016S284000

Reexamination Certificate

active

07966693

ABSTRACT:
A hinge apparatus includes an upper body, a lower body, a shaft whose lower end portion is rotatably installed in the lower body, a piston whose outer circumference is slidably installed along the inner surface of the lower body, a rotational/linear motion converter which converts a rotational motion of the shaft into an axial linear motion of the piston, a damping unit provides a damping function selectively where the piston ascends according to return of the door, a torsion spring rotates the shaft in the door closing direction, and a clutch unit for stopping the elastic force due to reverse twisting of the spring or for restoring the elastic force of the spring.

REFERENCES:
patent: 2118950 (1938-05-01), Stannard
patent: 4068344 (1978-01-01), Okabe
patent: 4117567 (1978-10-01), Shimizu
patent: 4155144 (1979-05-01), Koganei
patent: 4413373 (1983-11-01), Sasaki
patent: 4829628 (1989-05-01), Vuksic
patent: 5152029 (1992-10-01), Pai
patent: 5855040 (1999-01-01), Lin
patent: 6205619 (2001-03-01), Jang
patent: 6658694 (2003-12-01), Wang
patent: 2004/0250377 (2004-12-01), Park

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