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.:
Date of Patent:
Jul. 04, 2023
Filed:
Jun. 28, 2019
Eaton Intelligent Power Limited, Dublin, IE;
Charles Shand, Southampton, GB;
Mark D. Stacey, Portsmouth, GB;
Simon Orde, Bognor Regis, GB;
Steven C. Birch, Portsmouth, GB;
Stephen Devan, Madison, MS (US);
Phillip Galloway, Madison, MS (US);
Douglas Scott, Brandon, MS (US);
Daniel Chapman, Flowood, MS (US);
Eaton Intelligent Power Limited, Dublin, IE;
Abstract
An electric motor pump system includes a variable displacement pump, an electric motor connected to drive the variable displacement pump, a first control piston configured to limit an output pressure characteristic of the pump, and a second control piston controlled via a servo valve according to an output speed of the electric motor. In embodiments, the second piston is configured to maintain a substantially constant output flow of the pump as the output speed of the electric motor changes. With embodiments, the first and second control pistons may be configured to act on a yoke of the variable displacement pump.