Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Closure checks
Reexamination Certificate
2005-04-19
2005-04-19
Mah, Chuck Y. (Department: 3676)
Miscellaneous hardware (e.g., bushing, carpet fastener, caster,
Closure checks
C016S085000, C016S334000, C016S335000, C016S327000
Reexamination Certificate
active
06880204
ABSTRACT:
A checker-equipped door hinge is provided in which a first notch and a second notch are respectively provided on the front surface and the reverse surface of a fixed base of a second hinge arm, and a torsion spring is formed from a single length of spring wire rod so as to have a torsion shaft portion supported in the first notch, a fixed end portion supported in the second notch, a free end portion rotatably supporting a roller, a U-shaped fixed arm portion providing a connection between the fixed end portion and one end of the torsion shaft portion, and a U-shaped movable arm portion providing a connection between the other end of the torsion shaft portion and the free end portion. This provides a checker-equipped door hinge that has a simple structure for mounting the torsion spring in the second hinge arm, together with good ease of mounting.
REFERENCES:
patent: 2992452 (1961-07-01), Schonitzer
patent: 3550185 (1970-12-01), Marchione
patent: 3889316 (1975-06-01), Koike
patent: 4285098 (1981-08-01), Hicks et al.
patent: 4677708 (1987-07-01), Streett
patent: 4720895 (1988-01-01), Peebles
patent: 4794669 (1989-01-01), Sanders
patent: 4815164 (1989-03-01), Rottinghaus
patent: 5067201 (1991-11-01), Marchione
patent: 5850673 (1998-12-01), Wood et al.
patent: 5926917 (1999-07-01), Gantz
patent: 2420295 (1975-11-01), None
patent: 3125966 (1983-01-01), None
patent: 3223938 (1983-12-01), None
patent: 2001-295535 (2001-10-01), None
Arent & Fox PLLC
Mah Chuck Y.
Rikenkaki Kogyo Kabushiki Kaisha
LandOfFree
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