Pumps – Expansible chamber type – Having separate noncyclic valve
Patent
1997-01-09
1998-12-08
Kavanaugh, Ted
Pumps
Expansible chamber type
Having separate noncyclic valve
36 29, 36 43, 2413, 297199, 29745241, 417435, F04B 2300, A43B 1320
Patent
active
058460632
ABSTRACT:
There is disclosed a preform for an air pump and relief valve assembly which has an assembly body with a substantially flat bottom and molded entirely of a flexible plastic to form a bulbous extremity on one end of the body and open at its bottom and a relief valve recess adjacent the opposite end of said body and open to a valve port in said bottom wall with at least one, and preferably two, internal passages open to the interior of the bulbous extremity and extending through said assembly body to a second port open at the bottom wall, with a substantially planar base flange extending about said body and peripherally about said bulbous extremity and said relief valve recess. The preform can be sealed to a flat sheet of plastic to complete the pump and relief valve and for this purpose has a transverse tunnel located between said internal passage and the bottom wall. The invention includes a method for assembling and bonding the preform to an inflatable enclosure formed of two sheets of flexible plastic, and the inflatable enclosure with a miniature air pump and relief valve as applied to a lining for apparel and protective shields.
REFERENCES:
patent: 5074765 (1991-12-01), Pekar
patent: 5257470 (1993-11-01), Auger et al.
patent: 5315715 (1994-05-01), Kronenberger
patent: 5318344 (1994-06-01), Wang
patent: 5353525 (1994-10-01), Grim
patent: 5406661 (1995-04-01), Pekar
patent: 5480287 (1996-01-01), Pozzebon
Kavanaugh Ted
Strauss Robert E.
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