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:
May. 30, 2006
Filed:
Oct. 01, 2004
David Geiger, Orchard Park, NY (US);
David Geiger, Orchard Park, NY (US);
Moog Inc., East Aurora, NY (US);
Abstract
An electrohydraulic actuator () includes a fluid-powered actuator () having a piston () in a cylinder (). The piston divides the cylinder into two opposed chambers (). The actuator includes a fixed-displacement reversible motor-driven pump () having a first port communicating with one of the chambers and having a second port communicating with the other of the chambers in a closed hydraulic system. A pre-charged accumulator () communicates with the pump first port. One of the actuator chambers is maintained at a fixed pre-charged pressure of the accumulator, and the operation of the pump controls the pressure in, and volume of, the other chamber.