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:
Dec. 06, 1977
Filed:
Apr. 22, 1976
Hiroshi Sakamaki, Utsunomiya, JA;
Toshiyuki Maeda, Ageo, JA;
Toshimitsu Sakai, Okazaki, JA;
Tadashi Saitou, Toyota, JA;
Nippon Piston Ring Kabushiki Kaisha, Tokyo, JA;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JA;
Abstract
A rotary fluid pump or compressor having a pair of flexible diaphragm type sealing plates which are clamped on opposite ends of a stator housing by end heads to form a cylindrical pump cavity and to be pressed onto the opposite end faces of a rotor driven within the pump cavity so as to provide sealing between the suction, compression and delivery chambers. Each of the sealing plates comprises a flat flange portion clamped between the end faces of the stator housing and the end head and a substantially cone shaped portion extending radially inwardly from the flat flange portion to be pressed onto the end face of the rotor and substantially coinciding at its apex with the axis of the rotor.