Valve

Details Valve Valve

2007-07-10

2007-07-10

Lazo, Thomas E. (Department: 3745)

Motors: expansible chamber type

With motive fluid valve

Valved piston

C092S18100P, C016S052000

Reexamination Certificate

active

11297148

ABSTRACT:
A piston assembly for a door closer includes a piston formed with a mounting hole and a door closer valve installed with clearance in the mounting hole. The door closer valve has a body part with first and second formations at opposite respective ends of the body part for engaging opposite respective sides of the piston and retaining the valve in the mounting hole. The body part is movable in the mounting hole axially of the mounting hole. The first formation is a protruding flange for seating against the piston at the first side thereof around the mounting hole and creating a seal around the mounting hole.

REFERENCES:
patent: 2276338 (1942-03-01), Potter et al.
patent: 4185356 (1980-01-01), Kuivalainen et al.
patent: 4349939 (1982-09-01), Tillmann
patent: 4793023 (1988-12-01), Simpson et al.
patent: 4793033 (1988-12-01), Simpson et al.
patent: 4999872 (1991-03-01), Jentsch
patent: 19651461 (1998-06-01), None
patent: 0467131 (1992-01-01), None
patent: 1293633 (2003-03-01), None

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