Lock assembly for valve
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United States of America Patent
Stats
-
Jul 9, 1991
Grant Date -
N/A
app pub date -
Aug 15, 1990
filing date -
Aug 15, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A locking construction for addition to an existing valve having a valve body, a flange on the valve body, a valve member in the valve body, a valve stem coupled to the valve member and extending through the flange for moving the valve member between various positions, the locking construction including a locking plate securely locked to the flange by bolts which can be removed only with a specialized kay, a plurality of tapped bores in the locking plate, an operating plate slidably mounted on the locking plate and keyed to the valve stem, bores in the operating plate for alignment with the tapped bores in the locking plate, and locking bolts extending through the bores in the operating plate and received in the tapped bores in the locking plate for locking the valve stem in position, the last-mentioned locking bolts capable of being manipulated only by a specialized key.
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