PISTON PUMP AND PISTON ASSEMBLY THEREFOR
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United States of America Patent
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Issued Date -
Nov 20, 2014
app pub date -
Sep 27, 2012
filing date -
Sep 30, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is piston pump (10) and piston assembly (30) for such a pump. The piston pump includes a cylinder (20) having an inner wall surface (22) formed around an axis A of the cylinder, and a piston assembly (30) for sliding along said cylinder axis, said piston assembly includes a slideable flexible seal (34) in generally sealing contact with said inner wall surface, and a seal mounting (44), said seal mounting having a plurality of circumferentially arranged members (37) moveable radially of said axis to increase or decrease the size of the seal.
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