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:
Apr. 15, 2008
Filed:
Aug. 29, 2005
Applicants:
Wade A. Burdick, Windsor, CO (US);
Gary M. Bowman, Loveland, CO (US);
Jeffrey T. Stewart, Greeley, CO (US);
Inventors:
Wade A. Burdick, Windsor, CO (US);
Gary M. Bowman, Loveland, CO (US);
Jeffrey T. Stewart, Greeley, CO (US);
Assignee:
Woodward Governor Company, Rockford, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16D 31/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electro hydraulic actuator with built-in fail safes is provided. Multiple accumulators are integrated into the actuator to improve reliability and redundancy. One or more accumulators can fail and the remaining accumulators provide sufficient energy to move the actuator to its fail-safe condition.