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.

Date of Patent:
Nov. 01, 2005

Filed:

Mar. 05, 2002
Applicants:

Hiroyuki Makino, Wako, JP;

Kenji Matsumoto, Wako, JP;

Naoki Itoh, Wako, JP;

Yoichi Kojima, Wako, JP;

Inventors:

Hiroyuki Makino, Wako, JP;

Kenji Matsumoto, Wako, JP;

Naoki Itoh, Wako, JP;

Yoichi Kojima, Wako, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01B003/10 ; F01B013/04 ;
U.S. Cl.
CPC ...
Abstract

A rotary fluid machine includes a first operating part () and a second operating part (), which are groups of axial piston cylinders, wherein a rotary valve () for controlling the intake and discharge of a working medium to and from the first and second operating parts () is formed from a first valve part that has a flat sliding surface () perpendicular to a rotational axis (L) of the rotor () and controls the intake and discharge of the working medium to and from the first operating part (), and a second valve part that has a cylindrical sliding surface () centered on the rotational axis (L) of the rotor () and controls the intake and discharge of the working medium to and from the second operating part (). Since the intake and discharge of the working medium to and from the first and second operating parts () are controlled by the common rotary valve (), the size of the rotary fluid machine can be reduced.


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