Fluid handling – With lock or seal – Locks against rotary motion
Patent
1980-03-11
1982-08-24
Frazier, Roy D.
Fluid handling
With lock or seal
Locks against rotary motion
70177, 70180, 70212, 70DIG58, 137588, 220 86AT, B65D 3916, B65D 5512, B65D 5514, F16K 3500
Patent
active
043456170
ABSTRACT:
A lock apparatus for attachment to the top of an input pipe communicating with a storage tank includes an open-ended cylindrical housing for mounting to the top of the input pipe, a butterfly valve mechanism pivotally mounted in the housing with a butterfly valve activating axle protruding through an orifice in the housing, and a locking mechanism. The locking mechanism includes a latch pivotally attached to the protruding end of the axle, a lock flange attached to the outside of the housing and, a tamper prevention flange in linear alignment with the axle and the latch to prevent unauthorized tampering with the axle and attached latch. The latch may be coupled to the lock flange and locked to maintain the butterfly valve in the closed position across the interior of the housing.
REFERENCES:
patent: 1099077 (1914-06-01), Wray
patent: 1171706 (1916-02-01), Crabtree
patent: 1422336 (1922-07-01), Cathrill
patent: 1738069 (1929-12-01), Holtson
patent: 1882154 (1932-10-01), Mann et al.
patent: 2064967 (1936-12-01), Young
patent: 2399578 (1946-04-01), Smith
patent: 2802492 (1957-08-01), Gosselin
patent: 3296680 (1967-01-01), Fritz
patent: 3338611 (1967-08-01), Bertovich, Jr. et al.
patent: 3990182 (1976-11-01), Linder
Frazier Roy D.
Pietruszka Carl F.
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