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US 2004/0170511 A1Published application
Pump
AssigneeNippon Pillar Packing Co., Ltd.
InventorsKazukiyo Teshima, Hitoshi Kawamura
Life of this patent
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Abstract
In a pump employing a bellows, individual members are formed from resins and pump components including a fitted assembly formed by fitting plural members with each other form a structure unit which is tightly inserted in an external cover and constrained on the opposite ends thereof for come off prevention. Thus, the distortion or deformation of the members during assembly is obviated and hence, a good sealing performance is achieved.
Claims10
A pump for generating a pumping action based on reciprocal movements of an air cylinder portion to thereby suck and discharge a fluid via valves,
- wherein pump components including a fitted assembly formed by fitting a plurality of members with each other form a structure unit which is constrained on the opposite ends thereof for come-off prevention as tightly inserted in an external cover.
Dependencies are inferred from the claim text.