Lock apparatus for storage tanks

Fluid handling – With lock or seal – Locks against rotary motion

Patent

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Details

70180, 137364, 137382, 137588, 141 52, 141290, 220 85VR, 220 86AT, 251 98, 251306, 251308, F16K 3506

Patent

active

044283954

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 valve assembly pivotally mounted in the housing with a valve activating axle protruding through an orifice in the housing, and a locking mechanism. The valve assembly includes at least one valve plate with a seal member provided around the edge of the valve plate for sealing the space between the edge of the valve plate and the cylindrical housing when the valve assembly is closed. 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 above and 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 valve in the closed position across the interior of the housing.

REFERENCES:
patent: 1099077 (1914-06-01), Wray
patent: 1248926 (1917-12-01), Schantz
patent: 1387971 (1921-08-01), Farmer
patent: 2335899 (1943-12-01), Arvintz
patent: 2802492 (1957-08-01), Gosselin
patent: 3111300 (1963-11-01), Boone
patent: 3200836 (1965-08-01), Trefil et al.
patent: 3311128 (1967-03-01), Taylor
patent: 3329394 (1967-07-01), Overbaugh
patent: 3675677 (1972-07-01), Scaramucci
patent: 4345617 (1982-08-01), Bravo

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