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. 16, 1984
Filed:
Aug. 14, 1979
Applicant:
Inventors:
Frederic W Pollman, Ames, IA (US);
Stanley W Crull, Ames, IA (US);
Assignee:
Sundstrand Corporation, Rockford, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F16H / ;
U.S. Cl.
CPC ...
60444 ; 60443 ; 60452 ; 417213 ;
Abstract
A pressure override control which utilizes pump output flow for destroking of a variable displacement pump to minimize loss of power and generation of heat and which includes modifications to the displacement control valve for the pump and, particularly, the cross connection of displacement-controlling servo motors when the displacement control valve is in a neutral position with blocking of communication of said servo motors to a displacement control pressure and drain whereby the pump cannot be positioned in a maximum displacement position in response to certain system malfunctions in the power override control circuitry.