Electro-hydraulic swashplate control arrangement for an axial piston pump

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United States of America Patent

PATENT NO 10961998
APP PUB NO 20190277275A1
SERIAL NO

15915460

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A control arrangement controls a position of a swashplate in an axial piston pump between a no-stroke position and a maximum stroke position. The control arrangement includes a servo spool mounted for limited sliding movement in a compensator piston cylinder. A solenoid coil is configured to provide a coil force to move the servo spool. A compensator piston is mounted in the compensator piston cylinder in response to movement of the servo spool. A spring between the servo spool and the compensator piston provides a spring force in response to the coil force applied to the servo spool. The control arrangement defines a feedback system configured to maintain a balancing relationship between the spring and coil forces to enable infinite control of the swashplate position.

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Patent Owner(s)

  • HARTMANN CONTROLS, INC.

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bethke, Donald G Bonita Springs, US 4 47

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