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:
Jul. 31, 2012
Filed:
Apr. 21, 2009
Martin Steigerwald, Glattbach, DE;
Burkhard Sturmer, Kleinostheim, DE;
Martin Steigerwald, Glattbach, DE;
Burkhard Sturmer, Kleinostheim, DE;
Linde Material Handling GmbH, Aschaffenburg, DE;
Abstract
A hydrostatic pump () has a mechanical displacement volume control with a mechanical control element (), which for generation of an actuator pressure that acts on a positioning piston () which is functionally connected with a displacement setting device (), has a position-controlled control valve () functionally connected with a control lever () and with the displacement setting device () of the pump (). A pump with a mechanical displacement volume control with a pressure limiting function can be accomplished by mechanically decoupling the control lever () from the displacement setting device () whereby a pressure cutoff function is provided, with which, by respective pilot valves (), a pressure signal can be generated from a delivery line () of the pump (), which signal is transmitted via the control valve () to the positioning piston () and counteracts the control pressure.