Valve

Details Valve Valve

1991-05-16

1992-06-09

Fox, John C.

Valves and valve actuation

With means to increase head and seat contact pressure

Gate valve

251204, F16K 310

Patent

active

051200198

ABSTRACT:
Valve mechanism for high-vacuum clean environments, wherein a slot aperture is closed by a gage having a lever. Motion of the gate which covers and uncovers the slot is imparted to the gate by longitudinal movement of the lever. Motion of the gate which seals and unseals the slot is imparted by pivoting movement of the level about a fulcrum near the center of the lever. The pivoting movement is imparted at a time different from that at which the longitudinal movement is imparted, and the pivoting movement may be imparted by means separate from that which imparts the longitudinal movement.

REFERENCES:
patent: 4721282 (1988-01-01), Shawver et al.
patent: 5002255 (1991-03-01), Sawa et al.

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