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:
Apr. 15, 1980
Filed:
Nov. 09, 1977
Hiroshi Sakamaki, Tochigi, JP;
Toshiyuki Maeda, Ageo, JP;
Fumihiro Ushijima, Toyota, JP;
Tadashi Saitou, Toyota, JP;
Nippon Piston Ring Co., Ltd., Tokyo, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
A dry rotary fluid pump or compressor includes a rotor eccentrically supported in a rotor chamber generally defined by a stator housing and two end heads. Two side plates each interposed between the housing and each of the end heads form end chambers between the respective side plates and end heads. The end chambers are supplied with a pressure higher than that of the rotor chamber so as to bring the side plates into close contact with opposite side faces of the rotor. The side plates are formed of a material having an abrasion resistance higher than that of at least the opposite side faces of the rotor.