Gate valve

Details Gate valve Gate valve

1984-01-30

1986-10-14

Scott, Samuel

Valves and valve actuation

Mechanical movement actuator

Screw

251274, 251368, F16K 3150, F16K 328

Patent

active

046168044

ABSTRACT:
A gate valve comprising a valve casing having a valve chamber therein, a valve body moving up and down in the valve chamber so as to open and shut a valve passage, and a spindle engaged with the valve body and moving up and down in accordance with rotation of a handle so that the valve body moves up and down in the valve chamber. A cover is mounted above the valve chamber so as to seal and isolate the valve chamber. An upper threaded portion of the spindle passes through the cover. A guide ring having projections therearound is attached to the spindle. The projections of the ring are fitted into vertical lead grooves arranged on the inner wall of the cover.

REFERENCES:
patent: 2049516 (1936-08-01), Ruhstorfer
patent: 2780233 (1957-02-01), Volpin
patent: 2801820 (1957-08-01), Green
patent: 3006597 (1961-10-01), Hookway
patent: 3185437 (1965-05-01), Rice
patent: 3217735 (1965-11-01), Stalter
patent: 3327992 (1967-06-01), Billeter et al.

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