Reversing valve for a compressed air membrane pump
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United States of America Patent
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-
May 7, 2002
Grant Date -
Aug 23, 2001
app pub date -
Aug 31, 1998
filing date -
Sep 4, 1997
priority date (Note) -
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Abstract
A reversing valve for a compressed air membrane pump in which an equilibrium state of the main piston in the neutral position, leading to stoppage of the pump, is prevented by disposing the main system piston and the pilot system piston immediately adjacent to one another.
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