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. 27, 2007
Filed:
Apr. 14, 2005
Reinhardt Thoms, Neumunster, DE;
Carsten Fiebing, Jevenstedt, DE;
Bernd Hames, Henstedt-Ulsburg, DE;
Martin Wüstefeld, Neumunster, DE;
Reinhardt Thoms, Neumunster, DE;
Carsten Fiebing, Jevenstedt, DE;
Bernd Hames, Henstedt-Ulsburg, DE;
Martin Wüstefeld, Neumunster, DE;
Sauer-Danfoss Inc., Ames, IA (US);
Abstract
An axial piston machine having a swashplate or an oblique axis which can be adjusted by means of servopistons and has a valve segment and an adjustment unit for the electrically proportional adjustment of the volumetric displacement. The adjustment unit comprises proportional magnets which can be activated electrically, and a control piston for controlling the oil pressure which moves the servopistons. The proportional magnets act on the control piston along a common tappet axis, a feedback device for feeding back the current swashplate or oblique-axis valve-segment position to the control piston being provided. The feedback device comprises spring levers' which can pivot about an axis, the spring levers′ each being mounted on the pivot axiswith a bearing shell, which are each composed of two component shells which support the spring lever′ at separate locations on the pivot axis, and which each essentially enclose a half-space about the pivot axis