Door closer

Miscellaneous hardware (e.g. – bushing – carpet fastener – caster – Checks and closers – Liquid

Reexamination Certificate

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Details

C016S055000, C016S056000, C016S284000, C016S058000

Reexamination Certificate

active

07003847

ABSTRACT:
A door closer comprising a housing, a member for driving engagement with a door, the member being rotatable relative to the housing in a door opening direction and in a door closing direction, a spring apparatus within the housing providing a resilient bias, the resilient bias being increased by rotation of the member in the door opening direction and a check device for controlling rotation of the member in the door closing direction and hence closure of the door under the action of the spring apparatus, the door closer having a back check comprising a piston member movable in a cylinder from an initial position against resistance of a fluid medium by rotation of the rotatable member in the opening direction.

REFERENCES:
patent: 2700175 (1955-01-01), Carlson
patent: 3137888 (1964-06-01), Blom
patent: 3246362 (1966-04-01), Jackson
patent: 3724023 (1973-04-01), Tillmann
patent: 3742553 (1973-07-01), Sittmann
patent: 4064589 (1977-12-01), Bejarano et al.
patent: 4349939 (1982-09-01), Tillmann
patent: 4378612 (1983-04-01), Beers
patent: 4414703 (1983-11-01), Schnarr et al.
patent: 4785493 (1988-11-01), Tillmann et al.
patent: 4793023 (1988-12-01), Simpson et al.
patent: 5050268 (1991-09-01), Toledo
patent: 5337448 (1994-08-01), Brown
patent: 5417013 (1995-05-01), Tillmann
patent: 5832562 (1998-11-01), Luca
patent: 6260236 (2001-07-01), Toledo
patent: 6397430 (2002-06-01), Brown et al.

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