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. 12, 1988
Filed:
Oct. 02, 1987
Marvin L Bernstrom, Eden Prairie, MN (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A rotary fluid pressure device of the type including a gerotor gear set (115) including a ring member (119) and a star (123). Adjacent to the gerotor set are endcap members (117) each having an end surface (141) in engagement with an adjacent end surface of the star. The disclosed invention relates to valve-in-star type valving whereby both the manifold valving action and the commutating valving action occur at the interfaces of the end surfaces of the star and endcap members. Specifically, fluid is communicated from the inlet port (137) in one endcap member through an annular fluid pressure chamber (143) into a manifold zone (157) defined by the star, then through a passage (165) into a fluid port (161). The fluid ports are in commutating fluid communication with a plurality of stationary valve passages (151) define by the endcap member, each of which is in communication with one of the gerotor volume chambers. Similar passages (151), ports (163), passages (167), manifold zone (159), and pressure chamber (147 ) communicate the gerotor volume chambers with the outlet port (139) in the other endcap member.