Closure safety device

Details Closure safety device Closure safety device

1983-07-08

1984-06-05

Hall, George T.

Receptacles

Closures

Having means for securing or retaining closure in its closed...

B65D 4500

Patent

active

044523726

ABSTRACT:
A pressure activated safety device includes a body structure defining an internal chamber having a partition movably disposed within the chamber. Pressure from a pipeline, pressure vessel, etc., acts upon the partition and positions it at a locking position preventing a venting seal from being released. A seal releasing element is movable relative to the body structure and is manually forced into an unlocking position against the bias of pressure acting upon the partition. The partition is pressure responsive such that it is manually movable from the locking position only upon the occurrence of a negligible pressure condition within the pressure chamber, thus providing for movement of a mechanical object only under an internal pressure condition that renders the apparatus safe.

REFERENCES:
patent: 4122969 (1978-10-01), Hughey
patent: 4367823 (1983-01-01), Raver

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