Pump structure connectable with an air cushion or a bladder

Abstract

A pump structure connectable with an aircushion or a bladder. The pump structure includes: a flexible main body defining a valve room in which a relief valve is arranged and a compressible chamber; a one-way valve permitting the fluid to one-way flow into the chamber; and a thin membrane-type check valve. The check valve has a first end and a second end, which are operable between opened position and closed position. The first and second ends respectively communicate with the chamber and an output tube, which is connectable with the aircushion or bladder. The first and second ends of the check valve are respectively positioned in spaces provided by the chamber and the valve room. A substrate board is disposed under the flexible main body. The substrate board has a through hole and a notch formed on positions where the first and second ends of the check valve are formed.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a continuation-in-part application of U.S. patent application Ser. No. 11 / 232,942.BACKGROUND OF THE INVENTION[0002]The present invention relates to a pump structure connectable with an aircushion or a bladder. The pump structure is composed of a flexible main body defining a chamber and a valve room, a thin membrane-type check valve and a substrate board having a through hole and a notch. The chamber is reciprocally compressible and decompressible to pump a fluid for inflating the aircushion or bladder.[0003]A pump is used to pump fluid (gas or liquid) into a cushion or a bladder to form an elastic article such as inflatable mattress, inflatable pillow, inflatable toy, cushion pad, etc. When not used, these inflatable articles can be deflated and stored. U.S. Pat. No. 5,144,708, entitled “check valve for fluid bladders” discloses a technique for combining a bladder with an inflation pump. The bladder is composed of an u...

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