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:
Mar. 06, 2001
Filed:
Nov. 16, 1998
Steven J. Zumbusch, Chanhassen, MN (US);
Benjamin M. Hoxie, St. Paul, MN (US);
Maynard W. Marts, Bloomington, MN (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A hydraulic unit of the type including a cylinder block (,) rotatably disposed adjacent a valve plate (,) having inlet ports,, and,, and further having outlet ports,, and,. Disposed between the individual inlet and outlet ports are web portions, having nominal cross-sections and flow restrictions. In one embodiment (FIG.,), there is a modified web portion (,) toward the trailing end of the outlet port, and in the other embodiment (FIG.,), there is a modified web portion (,) toward the leading end of the outlet port. In either case, the web portion has its cross-section or flow restriction modified to move the resultant force on the swashplate (,) in a direction tending to reduce the moments on the swashplate, and therefore, reduce the operator effort required to move or maintain the control lever.