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:
Nov. 06, 2001
Filed:
Mar. 23, 2000
Brueninghaus Hydromatik GmbH, Elchingen, DE;
Abstract
A control device for an adjustable hydraulic pump (,), wherein the hydraulic pump is connected to a plurality of users, by delivery lines (,). A first control line (,), is connected to each of the delivery lines downstream of a respective proportioning throttle (,). A first pressure change device (,) selects a highest pressure prevailing in the first control lines and supplies it to a delivery flow control valve (,), which controls an adjusting pressure for an adjusting device (,) for the hydraulic pump, based on a pressure difference between the highest pressure from the first pressure change device and a pressure from a second control line (,) connected to the output of the pump. A power control valve (,) is connected between the first control lines of a power-controlled group of users and a pressure medium tank (,), with pressure from the first control lines acting to open the power control valve, and the adjusting device acting, via a measuring spring arrangement (,), to close the power control valve. The first control lines of a non-power-controlled group of users are separated from the power control valve.