Door closer

Details Door closer Door closer

2006-03-07

2006-03-07

Sandy, Robert J. (Department: 3677)

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

Checks and closers

Liquid

C016S071000, C016S328000, C016SDIG043, C016S053000

Reexamination Certificate

active

07007341

ABSTRACT:
A door closer includes a closer casing, a pivot unit, and a length-variable damping cylinder. The pivot unit includes a pivot axle, a cam member, and a cam follower member. The pivot axle has a drive end portion that extends into and that is retained rotatably in the closer casing, and a coupling end portion that extends out of the closer casing. The cam member is mounted co-rotatably on the drive end portion of the pivot axle. The cam follower member is disposed in the closer casing, and is acted upon by the cam member. The damping cylinder is disposed in the closer casing, and has one end coupled to the cam follower member and an opposite end anchored to the closer casing.

REFERENCES:
patent: 4064589 (1977-12-01), Bejarano et al.
patent: 4763384 (1988-08-01), Watabe
patent: 4785493 (1988-11-01), Tillmann et al.
patent: 5337448 (1994-08-01), Brown
patent: 5802670 (1998-09-01), Bienek
patent: 6442795 (2002-09-01), Chen
patent: 6823561 (2004-11-01), Park et al.

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