Dual reciprocating bellows pump with interlock shaft means
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United States of America Patent
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N/A
Issued Date -
Sep 1, 2005
app pub date -
Jan 27, 2005
filing date -
Jan 27, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
It is sought to provide a dual reciprocating bellows pump having two, i.e., left and right, bellows interlocked by interlock shafts to each other, which is free of wear powder or wear dust generated by the frictional movement of the interlock shafts and bearings relative to one another from pump feed fluid in pumping chambers, permits ready use of synthetic resin as pump element material, is excellent in function and cost and readily permits size reduction design. Paired interlock shafts coupled to end members 6 of the pair of, i.e., left and right, bellows, are disposed in paired working air chambers 8, and are movably inserted in through bores provided in a pump head. Between each interlock shaft and each through elastic seal members are disposed, thus sealing the left and right working air chambers 8 from each other. No particular bearing is used for the interlock shafts. Lip seals are desirably used as the elastic seal members.
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