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:
Aug. 24, 1999
Filed:
May. 29, 1997
Eckhard Skirde, Aukrug-Boken, DE;
Sauer Inc., Ames, IA (US);
Abstract
A control system for a variable pump and a process to control the variable pump with a circuit connected to a hydraulic motor by working lines, controlled by an electronic controller, having check valves in the circuit to allow oil flow from a charge pump going into the circuit and further consisting of high pressure relief valves to allow oil flow out of the working lines to limit maximum pressure. A temperature sensor is placed between the high pressure relief valves and the connected check valves. A signal is processed in an electronic control to control the displacement of a variable pump, depending on temperature measure of the fluid flowing across the high pressure relief valves.