Vessel vacuum release

Details Vessel vacuum release Vessel vacuum release

1990-07-30

1992-05-12

Smith, Leonard E.

Pumps

Expansible chamber type

Having separate noncyclic valve

251245, 251246, 251322, 251323, A61F 541, F04B 3908, F16K 3144

Patent

active

051122030

ABSTRACT:
There is disclosed herein an inexpensive, compact vacuum release which can be operated with one finger. The vacuum release comprises a base which is affixed to the wall of a vessel, a plunger which extends through a channel in the base, a rocker which raises the plunger to an open position in response to finger pressure, and a spring which biases the plunger to a closed position. The plunger has multiple passageways in which air can flow from the atmosphere into the vessel when the plunger is in the open position, and an "O" ring which closes off the air flow when the plunger is in the closed position. Since the vacuum release need not be permanently affixed to the vessel, it can be used on a wide variety of new and existing vessels, and can be replaced at will.

REFERENCES:
patent: 1307450 (1919-06-01), Morton
patent: 1669419 (1928-05-01), Lunken
patent: 2672316 (1954-03-01), Persak, Jr. et al.
patent: 2745628 (1956-05-01), Carlson
patent: 4350477 (1982-09-01), Mazal
patent: 4753227 (1988-06-01), Yanuck, Jr.
patent: 4856498 (1989-08-01), Osbon

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