Variable displacement pump-motor

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10738757
APP PUB NO 20170159641A1
SERIAL NO

15368643

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A variable displacement pump-motor includes a pump-motor having a plurality of cylinders and pistons, and further including a main shaft rotatable relative to the system body. A hydro mechanical control system includes a plurality of main stage valves in communication with the plurality of cylinders. Each of the main stage valves is configured to open and close a cylinder of the plurality of cylinders to one or more of high or low pressure fluid sources. A pilot spool valve is in selective communication with each of the main stage valves. The pilot spool rotates with the main shaft. The pilot spool includes coding configured to operate each of the main stage valves to open and close the respective cylinders to the one or more high and low pressure fluid sources according to a translational position of the pilot spool and rotation of the pilot spool by the main shaft.

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Patent Owner(s)

Patent OwnerAddress
REGENTS OF THE UNIVERSITY OF MINNESOTA200 OAK STREET S E 450 MCNAMARA ALUMNI CENTER MINNEAPOLIS MN 55455-2070

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chase, Thomas Minneapolis, US 14 88
Li, Perry Yan-Ho Plymouth, US 3 0
Rannow, Michael Minneapolis, US 8 20

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