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:
May. 04, 1976
Filed:
Oct. 10, 1973
Applicant:
Inventor:
Toshimitsu Sakai, Toyota, JA;
Assignee:
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F04B / ;
U.S. Cl.
CPC ...
417244 ; 417470 ;
Abstract
A diaphragm vacuum pump, which comprises a first and a second pressure reduction chambers respectively at the both faces of the spring loaded diaphragm piston assembly of the pump. The first and second chambers are respectively connected with a pneumatically operated device and the atmosphere and connected to each other, suction and discharge of the air in the first chamber being conducted in an opposite cycle against those in the second chamber to subsequently produce vacuum of a high degree by the reciprocation of the diaphragm piston assembly.