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:
Jul. 13, 1976
Filed:
Dec. 16, 1974
Applicant:
Inventors:
Assignees:
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JA;
Aisan Kogyo Kabushiki Kaisha, Obu, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ; F01B / ;
U.S. Cl.
CPC ...
417471 ; 92 8 / ;
Abstract
In a diaphragm vacuum pump for vehicles, a resilient cushion material is integrally secured on the diaphragm piston within the pressure reduction chamber of the pump to minimize the volume of the pressure reduction chamber when the diaphragm piston reaches its upper dead point.