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:
Oct. 11, 2005
Filed:
Jan. 10, 2003
Kevin E. Greeb, Fort Collins, CO (US);
Jeffrey T. Stewart, Greeley, CO (US);
Grant A. Sweer, Fort Collins, CO (US);
Joel W. Kleckler, Rockton, IL (US);
Roger T. Hybeck, Fort Collins, CO (US);
Kevin E. Greeb, Fort Collins, CO (US);
Jeffrey T. Stewart, Greeley, CO (US);
Grant A. Sweer, Fort Collins, CO (US);
Joel W. Kleckler, Rockton, IL (US);
Roger T. Hybeck, Fort Collins, CO (US);
Woodward Governor Company, Fort Collins, CO (US);
Abstract
An electrical actuator is particularly suited for driving a wellhead valve for regulating the flow of natural gas from a production well. The electrical actuator can be driven using the existing local power supply in wellhead valve systems, typically a solar panel and a battery. The electrical actuator may include a gear reduction train, a brake and a manual input override with clutch protection. The electrical actuator can be configured in three different operational modes that provides a predetermined position upon power loss including fail-bias fixed, fail open and fail bias closed.