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:
Mar. 28, 2006
Filed:
Jan. 08, 2004
Barry T. Brinks, Fort Collins, CO (US);
Dana Nova Joyce Wolverton, Fort Collins, CO (US);
Delbert Dwight Cannon, Greeley, CO (US);
Gary F. Mcdaniel, Fort Collins, CO (US);
Barry T. Brinks, Fort Collins, CO (US);
Dana Nova Joyce Wolverton, Fort Collins, CO (US);
Delbert Dwight Cannon, Greeley, CO (US);
Gary F. McDaniel, Fort Collins, CO (US);
Woodward Governor Company, Fort Collins, CO (US);
Abstract
A fluid metering valve includes a gear rack which is slidable on a valve stem in which a spring counteracts the force of an actuator to maintain a constant load on the gear mechanism to prevent backlash. Corresponding stop mechanisms between the gear and the shaft of a rotary actuator come into engagement with each other near a fully closed position of the fluid metering valve for zero calibration purposes upon power loss to the actuator. A single valve member and a single actuator of the fluid metering valve provides for both a shut-off function and a metering function.