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. 26, 2002
Filed:
Nov. 08, 1999
Applicant:
Inventors:
Robert M. Tellander, Coon Rapids, MN (US);
Kenneth W. Hummel, Coon Rapids, MN (US);
Kenneth P. Weichelt, White Bear Lake, MN (US);
Edward L. Rosenwinkel, Eden Prairie, MN (US);
Assignee:
United Defense, L.P., Arlington, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
F41A 9/16 ;
U.S. Cl.
CPC ...
F41A 9/16 ;
Abstract
The invention discloses a structured set of electro-hydraulic pilot servo valves to operate an actuator arm to raise and lower an ammunition cradle. The servo valve structure and operational logic provides redundancy and reduces probability of failure. If one of the valves malfunctions, the remaining other two valves vote to carry more flow to compensate for the lost capacity thereby continuously maintaining system performance at pre-failure or near full capacity levels.