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:
May. 31, 1988
Filed:
Dec. 22, 1986
Tadeusz Budzich, Moreland Hills, OH (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A load sensing circuit of a load responsive direction control valve including a device for sensing load pressure signals identifying those load pressure signals as positive or negative and transmitting those identified positive or negative load pressure signals to the throttling compensator control of the load responsive valve, while also transmitting the positive load pressure signal to the pump control. The load pressure signals from individual cylinder ports, together with the signals related to the direction of displacement of the controlled load, are transmitted electrically to an electrical logic circuit, which identifies the load pressures as positive or negative and generates the required electrical signals to the electrohydraulic controls, which connect the positive or negative load pressure to throttling compensator controls of the load responsive direction and flow control valve.