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:
Nov. 06, 2001
Filed:
Mar. 06, 2001
Takeshi Kouno, Ibaraki-ken, JP;
Hirokatsu Kohsokabe, Ibaraki-ken, JP;
Masahiro Takebayashi, Tochigi-ken, JP;
Shunichi Mitsuya, Hamamatsu, JP;
Shigetaro Tagawa, Tochigi-ken, JP;
Yasuhiro Ohshima, Tochigi-ken, JP;
Kingo Moriyama, Shimizu, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers is formed when the positional relationship between the displacer and cylinder is for a gyration, the wear is reduced between the cylinder and displacer. Sliding portions between the displacer,and a cylinder,are fed with a lubricating oil,by forming an oil-feeding groove,in the surface of the displacer,so as to extend from the central portion of the displacer,to the vicinity of a suction port,, and feeding the lubricating oil,from the central portion of the displacer,, so that the wear can be reduced.