Dual piston pump with magnetically actuated pistons
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United States of America Patent
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-
Sep 2, 1997
Issued Date -
N/A
app pub date -
May 31, 1996
filing date -
Oct 31, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hydraulic pump has a magnetic tube and two floating pistons within the tube, adapted to be moved in an axial direction within the tube as a result of magnetic flux generated by an electric coil surrounding the tube. Each piston has a valve for allowing fluid flow in one direction through the tube, and spring means acts on the pistons to control their positions. The arrangement allows operation with reduced vibration and pressure fluctuation, less heat and impact during dry running operation, and less heat and impact during high pressure shut-off.
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