Fluid handling – With lock or seal – Locks against rotary motion
Patent
1984-10-15
1986-09-30
Schwadron, Martin P.
Fluid handling
With lock or seal
Locks against rotary motion
251309, F16K 3506
Patent
active
046142037
ABSTRACT:
A rotary plug valve capable of being locked in selected positions includes a body and a valve member rotatable in the body between valve open and closed positions. Transverse bores are formed in the body and valve member for reception of a locking pin having a first enlarged head on a reduced shank and a second enlarged head capable of receiving the reduced end of the shank and of being locked thereto. The bore in the body is of a size to receive the heads, the central portion of the bore in the valve body being of a size less than the diameter of the heads but sufficient to receive the shank of the locking pin so that once locked, the pin may not be removed and the valve body and valve member may not be rotated relatively to one another. The pin may be unlocked by a key axially inserted into the shank through one of the heads.
REFERENCES:
patent: 102290 (1870-04-01), Maxwell
patent: 359714 (1887-03-01), Deming
patent: 1262185 (1918-04-01), Drew
patent: 1325189 (1919-12-01), Carter
patent: 2748794 (1956-06-01), Dodds
patent: 3554218 (1971-01-01), Smith
patent: 3560130 (1971-02-01), Horhota
patent: 4126023 (1978-11-01), Smith et al.
Gas Energy, Inc.
Novack Sheri M.
Schwadron Martin P.
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