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:
Aug. 02, 1988
Filed:
Mar. 12, 1987
Applicant:
Inventors:
Bjarne Dissing, Hammel, DK;
Niels D Jensen, Bjerringbro, DK;
Assignee:
Grundfos International A/S, Bjerringbro, DK;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B / ;
U.S. Cl.
CPC ...
318471 ; 318 34 ; 307 39 ; 361170 ;
Abstract
An electric motor comprising a motor overload protection such as a thermal switch and a main relay for controlling a multipolar switch in the voltage supply conductors of the motor. The thermal switch and the main relay are mounted in a control circuit in parallel with the voltage supply conductors. An auxiliary relay is coupled in parallel with the main relay and can connect an auxiliary motor via a contact arm when the thermal switch is switched off.