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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11415128 B1

PDFFull Text
Date of Patent:
Aug. 16, 2022

Filed:

Jun. 08, 2018

Variable displacement pump and control method therefor

Applicant:

Hitachi Automotive Systems, Ltd., Hitachinaka, JP;

Inventors:

Koji Saga, Ebina, JP;

Hideaki Ohnishi, Atsugi, JP;

Assignee:

HITACHI ASTEMO, LTD., Hitachinaka, JP;

Attorney:

Foley & Lardner LLP

Primary Examiner:

Theresa Trieu

Int. Cl.
CPC ...
F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01); F04C 14/18 (2006.01); F04C 14/22 (2006.01); F04C 14/24 (2006.01); F04C 15/06 (2006.01); F04C 2/344 (2006.01);
U.S. Cl.
CPC ...
F04C 14/226 (2013.01); F04C 2/344 (2013.01); F04C 14/18 (2013.01); F04C 14/223 (2013.01); F04C 14/24 (2013.01); F04C 15/06 (2013.01);
Abstract

A variable displacement pump device includes a pump, a mover, a biasing member, first and second control chambers, and a controller. The first and second control chambers are provided between an inner periphery of a containing chamber of a housing and an outer periphery of the mover. Hydraulic oil is introduced from a discharge port into the first control chamber. The pump is configured to permit oil to be introduced from the discharge port into the second control chamber via a supply/discharge passage or to be discharged from inside the second control chamber. The second control chamber is located adjacent to any of the pump chambers in a discharge region or the discharge port via the mover. The controller is configured to switch states in which the second control chamber is opened and closed to the supply/discharge passage.

Find Patent Forward Citations

Saga, Koji. (2022). Variable displacement pump and control method therefor (U.S. Patent No. 11415128). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11415128

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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