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:
Jun. 01, 2004
Filed:
Dec. 26, 2002
Richard Scott Leemhuis, Rochester Hills, MI (US);
Valeo Electrical Systems, Inc., Auburn Hills, MI (US);
Abstract
A gerotor motor having an inner gerotor positioned within an outer gerotor, a housing radially surrounding the outer gerotor, a cover plate positioned adjacent the outer gerotor and pressure balance grooves extending between the outer gerotor/cover plate interface and a region of radial clearance between the outer gerotor and the housing. Three such balance grooves are disclosed. They include an inlet balance groove, an outlet balance groove and an axial balance groove. These grooves serve to balance axial and radial hydraulic pressure forces acting on the outer gerotor. The resulting net pressure force is substantially independent of both inlet and outlet pressure.