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. 25, 2012
Filed:
Jun. 11, 2009
Timothy J. Farrow, Fort Collins, CO (US);
Gregory J. Brodsack, Loveland, CO (US);
Ronald L. Witt, Fort Collins, CO (US);
Timothy J. Farrow, Fort Collins, CO (US);
Gregory J. Brodsack, Loveland, CO (US);
Ronald L. Witt, Fort Collins, CO (US);
Woodward, Inc., Fort Collins, CO (US);
Abstract
A valve assembly includes a valve housing located between a fluid inlet region maintained at a first pressure and a fluid outlet region maintained at a second pressure. A movable metering plate is located within valve housing. A fixed metering plate interacts with the movable metering plate to meter fluid flow through the valve housing. An armature is coupled to the movable metering plate and is configured to move the movable metering plate from a closed position toward an open position. The fluid admission system further includes a balancing region to balance pressure related forces acting on the movable portions of the valve, including the metering plate. A balance passageway is in communication with the balancing region and the fluid outlet region to maintain the balancing region at the second pressure of the fluid outlet region when the movable metering plate is in the closed position.