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. 19, 1988
Filed:
Nov. 24, 1986
Applicant:
Inventor:
Carl S Hartwig, Taby, SE;
Assignee:
Institut Cerac S.A., Ecublens, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B / ; H02K / ;
U.S. Cl.
CPC ...
417353 ; 417410 ; 418179 ; 418201 ; 310 67 ; 310 87 ;
Abstract
A rotary machine having two meshing rotors (14,15) rotatable in intersecting bores (12,13). The bore walls are provided with a number of electrical windings (18,19) being stator windings of an electric motor in which the pump rotors (14,15) are the rotors of the electric motor. The electrical windings are connected to an inverter which creates rotating magnetic fields which rotate the rotors.