Valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 18, 2000
Issued Date -
N/A
app pub date -
Dec 4, 1997
filing date -
Dec 13, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The valve comprises an operating wheel connected by a connecting rod to an opening and closing member. The valve is sealed by a stuffening box fixed into the upper part of the body around the rod. The stuffening box has a polygonal head so that it can be screwed and unscrewed. However the head is not accessible using a conventional spanner so as to prevent a non-specialist form slackening of the stuffing box and avoid him risking an accident.
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