Gate valve
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United States of America Patent
Stats
-
Oct 14, 1986
Grant Date -
N/A
app pub date -
Jan 30, 1984
filing date -
Sep 19, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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