Variable displacement piston type pump
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United States of America Patent
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Dec 27, 2005
Grant Date -
Dec 2, 2004
app pub date -
May 27, 2003
filing date -
May 27, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
A method of providing variable pumping rate from a piston type pump at a constant drive speed, comprising providing a connecting rod connected to the throw of a crankshaft on one end and to a connecting pin on the other end, constraining said connecting pin to move reciprocally generally in a first direction when said crankshaft rotates, a piston connected to said connecting pin which is mounted in a head and moves reciprocally in a second direction, and varying the angle between said first direction and said second direction to vary the volume being pumped by said pump.
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