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:
Sep. 08, 2015
Filed:
Aug. 29, 2012
Kevin E. Greeb, Fort Collins, CO (US);
Philip A. Lafleur, Loveland, CO (US);
Jonathan P. Workman, Loveland, CO (US);
John J. Been, Fort Collins, CO (US);
Kevin E. Greeb, Fort Collins, CO (US);
Philip A. LaFleur, Loveland, CO (US);
Jonathan P. Workman, Loveland, CO (US);
John J. Been, Fort Collins, CO (US);
Woodward, Inc., Fort Collins, CO (US);
Abstract
Embodiments of the invention provide a high-reliability, cost-effective electro-hydraulic servo-valve assembly that is not susceptible to failure caused by contaminated fluid. In particular embodiments, the electro-hydraulic servo-valve assembly includes a rotary valve that may be actuated by either a direct-coupled Limited Angle Torque (LAT) motor, a geared, brushless DC motor, or some other rotary electric actuating element with an integrated driver circuit. In particular embodiments, the rotary valve element made up of an outer sleeve element and an inner spool element, with matching ports and slots, respectively.