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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.:

US 4193742 B1

PDFFull Text
Date of Patent:
Mar. 18, 1980

Filed:

Mar. 06, 1978

Vacuum pump assembly with built-in shutoff valve

Applicant:
Inventors:

Klaus Fischer, Wetzlar, DE;

Helmut Flauger, Braunfels, DE;

Kurt Balzer, , DE;

Roland Fischer, , DE;

Assignee:

Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH, Asslar, DE;

Attorney:

Toren, McGeady and Stanger

Primary Examiner:

William L Freeh

Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
417295 ; 417 24 ;
Abstract

A vacuum pump assembly is provided which includes a built-in pneumatic valve for closing the suction port of a vacuum pump of the assembly with an auxiliary valve being provided for controlling operation of the pneumatic valve. An electromagnetic valve is utilized as the auxiliary valve and a generator coupled with the shaft of the vacuum pump generates electric current in accordance with the operating stages of the pump in order to control the auxiliary valve.

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Fischer, Klaus. (1980). Vacuum pump assembly with built-in shutoff valve (U.S. Patent No. 4193742). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4193742

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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