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:
Feb. 27, 1996
Filed:
Feb. 17, 1995
Akihiko Ishiyama, Tochigi, JP;
Ken'ichi Kawashima, Hitachinaka, JP;
Hirokatsu Kohsokabe, Ibaraki, JP;
Shoichi Nakashima, Hitachi, JP;
Hideki Yazawa, Saitama, JP;
Hiroaki Hata, Tochigi, JP;
Tadashi Iizuka, Ashikaga, JP;
Kazuo Sekigami, Tochigi, JP;
Koichi Sato, Utsunomiya, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A rotary compressor has a compression chamber defined by a rolling piston which is eccentrically rotated in a cylinder by a rotary shaft including an eccentric crank portion, and by a blade which slides in a groove formed in the cylinder and of which the tip contacts an outer-peripheral surface of the rolling piston. In such a rotary compressor, abnormal wear in the contact portion between the rolling piston and the blade can be prevented as follows: Assuming that the rotation angle of the rolling piston when the blade is located at a start position of reciprocating motion is zero degrees, the contact surface of the blade which is in contact with the rolling piston is formed to have a curvature of substantially zero and as a flat surface when the rotation angle of the rolling piston is about 90 degrees and about 270 degrees and the pressing force of the blade with respect to the rolling piston reaches the maximum value; and also, a material which has an elastic modulus lower than that of the material of the rolling piston which is highly self-lubricative is used for the blade.