Piston pump
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United States of America Patent
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-
Aug 19, 2014
Grant Date -
Oct 6, 2011
app pub date -
Mar 28, 2011
filing date -
Mar 31, 2010
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
According to one embodiment, there is provide a piston pump, including: a cylinder having a bottomed cylindrical shape; a piston slidable within the cylinder, the cylinder and the piston defining a pressure chamber therebetween; a suction valve unit disposed in a suction passage of the pressure chamber; and a discharge valve unit disposed in a discharge passage of the pressure chamber, wherein the piston includes a cylindrical piston portion and a large diameter piston portion provided to cover one end of the cylindrical piston portion, and wherein the large diameter piston portion includes a working fluid guide groove extending thereinside along the axial direction of the piston.
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