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:
Sep. 27, 1977
Filed:
Jan. 30, 1976
Hiroshi Sakamaki, Utsunomiya, JA;
Toshiyuki Maeda, Ageo, JA;
Nippon Piston Ring Kabushiki Kaisha, Toyota, JA;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JA;
Abstract
A dry air rotary pump or compressor comprises a pair of flexible diaphragm type sealing plates which are clamped on the opposite ends of a stator housing by end heads to form a cylindrical pump cavity and to be pressedly contacted with the opposite end faces of a rotor driven within the pump cavity so as to provide the sealing between the suction and compression chambers of the pump or compressor. Each of the sealing plates is made of a composite consisting essentially, by weight, of 10.0 - 75.0% carbon and/or graphite, 0.1 - 60.0% molybdenum disulfide, 1.0 - 20.0% fluorine resin and the remainder, which is greater than 25.0% of the total composition by weight, being heat resistant synthetic resin without fluorine resin to have a coefficient of elasticity greater than 200 Kg/cm.sup.2.