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. 17, 2001
Filed:
Sep. 03, 1999
Applicant:
Inventors:
James D. Ryken, Roland, IA (US);
David D. Dirks, Ames, IA (US);
Wilhelm Göllner, Neumünster, IA (US);
Doug Kardell, Grimes, IA (US);
Assignee:
Sauer-Danfoss Inc., Ames, IA (US);
Primary Examiner:
Int. Cl.
CPC ...
F01B 3/02 ;
U.S. Cl.
CPC ...
F01B 3/02 ;
Abstract
A variable displacement bent axis hydraulic unit includes a control mechanism having a control housing with a displacement feedback sleeve and spool connected by a spring. A computer controls a proportional solenoid fluid valve that is in operative fluid engagement with the end of the spool opposite its spring connection with the displacement feedback sleeve. The displacement feedback sleeve is urged by the spring into engagement with a cam member on the yoke of the bent axis unit.