Pumps – Motor driven – Electric or magnetic motor
Patent
1996-05-31
1997-09-02
Thorpe, Timothy
Pumps
Motor driven
Electric or magnetic motor
417417, 417553, F04B 1704
Patent
active
056624611
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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Kim Ted
Thorpe Timothy
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