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:
May. 03, 1988
Filed:
May. 01, 1986
Marvin L Bernstrom, Eden Prairie, MN (US);
Other;
Abstract
A rotary fluid pressure device of the type including a gerotor gear set (15) including a ring member (19) and a star (23). Adjacent the gerotor set is an endcap member (17) having an end surface (41) in engagement with the adjacent end surface (42) 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 interface of the surfaces (41) and (42). Specifically, fluid is communicated from the inlet port (37) through a pressure chamber (43) into a manifold zone (57) defined by the star, then through a passage (65) into fluid port (61). The ports (61) are in commutating fluid communication with a plurality of stationary valve passages (51) defined by the endcap member (17), each of which is in communication with one of the gerotor volume chambers.