Gate valve

Details Gate valve Gate valve

2007-06-26

2007-06-26

Bastianelli, John (Department: 3753)

Valves and valve actuation

With means for blocking or disabling actuator

Latch manipulator mounted on valve body

C251S114000, C251S195000, C251S203000

Reexamination Certificate

active

11431878

ABSTRACT:
A gate valve has a transfer chamber-side valve element and a process chamber-side valve element connected to a single shaft. A rotary latch pivotably supported on an inner surface of one of the valve element with the rotary latch having a latch surface at a forward end thereof, wherein when a rotational force is applied to the rotary latch in one direction, the latch surface is pressed against a joint surface of the single shaft, whereby the valve element is latched to said single shaft, and when a rotational force is applied to the rotary latch in the opposite direction, the latch surface is separated from the joint surface of the single shaft to unlatch the valve element.

REFERENCES:
patent: 1882136 (1932-10-01), Freeze
patent: 2198639 (1940-04-01), Stines
patent: 3654962 (1972-04-01), Fredd et al.
patent: 3695578 (1972-10-01), Walther et al.
patent: 3722857 (1973-03-01), Townsend
patent: 4471942 (1984-09-01), Kocanowski
patent: 4721282 (1988-01-01), Shawver et al.
patent: 4944484 (1990-07-01), Hostetler
patent: 5004210 (1991-04-01), Sarno
patent: 5938175 (1999-08-01), Young et al.
patent: 6273053 (2001-08-01), Krepela et al.
patent: 6390448 (2002-05-01), Kroeker et al.

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