Reciprocating diaphragm pump with packless piston-cylinder unit
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United States of America Patent
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Oct 9, 2001
Grant Date -
N/A
app pub date -
Jan 21, 2000
filing date -
May 21, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
This invention provides a sealing mechanism for sealing the piston-cylinder unit of a reciprocating diaphragm pump to ensure that the piston-cylinder unit is permanently and reliably sealed while being simple to assemble. The invention further provides a piston-cylinder unit which has almost no play in the micrometer (.mu.m) range, and which is sealed by hydrodynamically sealing a slot thereof.
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