|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||5/708 ; 137/846 ; 417/480|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 79 인용 특허 : 0|
A check valve provides a one-way fluid passage from without to within a fluid bladder formed by a pair of plastic sheets sealed together about their periphery. The check valve is formed by a pair of superimposed films of thermoplastic material, generally equal in length, thermally bonded together at predetermined areas to define the fluid passage throughout the length of the valve. The inlet end of the valve has a V-shape edge with the apex pointing in a direction opposite the one-way fluid flow. Each of the films, adjacent the V-shape edge of inlet end,...
Combination fluid pump and inflatable bladder comprising an open-cell, elastomeric foam disposed between an upper and a lower sheet of synthetic plastic material sealed about the periphery thereof and the perimeter of the foam to form both a pumping chamber and the inflatable bladder, the foam being inherently compressible and expansible to absorb and expel fluid from cells thereof, an inlet valve into the pumping chamber provided by a hole through one of the plastic sheets opening at generally the central portion of the foam, an outlet check valve exten...