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. 17, 1985
Filed:
May. 01, 1985
Applicant:
Inventors:
Isao Hamano, Himeji, JP;
Akira Morishita, Himeji, JP;
Yoshifumi Akae, Himeji, JP;
Youji Nishimura, Hyogo, JP;
Toshinori Tanaka, Himeji, JP;
Kiyoshi Yabunaka, Himeji, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417250 ; 417350 ;
Abstract
An air pump device comprises an electric motor, a low and a high pressure type pump disposed at both ends of a rotary shaft extending from the motor to be connected in series to each other through a discharge tube from the low pressure type pump extending to a suction port of the high pressure type pump, and an air suction tube connected via a valve to the discharge tube downstream of a change-over switch disposed in the discharge tube.