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. 18, 2002
Filed:
Mar. 16, 2001
Applicant:
Inventors:
Hirokatsu Kohsokabe, Ibaraki-ken, JP;
Masahiro Takebayashi, Tochigi-ken, JP;
Shunichi Mitsuya, Hamamatsu, JP;
Hiroaki Hata, Tochigi-ken, JP;
Yasuhiro Ohshima, Tochigi-ken, JP;
Kenji Tojo, Ibaraki-ken, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01C 1/02 ;
U.S. Cl.
CPC ...
F01C 1/02 ;
Abstract
A displacement type fluid machine has a sliding contact portion between a cylinder and a displacer made into a predetermined section, and the cylinder and the displacer so contoured that when they are made concentric, the normal distance in the sliding contact section between the cylinder contour and the displacer contour may be smaller than that of the remaining section, thereby to decrease the radial gap to lower the internal leakage of the working fluid and to improve the performance and the reliability.