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. 25, 2012
Filed:
Apr. 27, 2012
Applicants:
Daniel Staffas, Ludvika, SE;
Johannes Tredoux, Ludvika, SE;
Mats Holman, Ludvika, SE;
Ulf Åkesson, Ludvika, SE;
Inventors:
Daniel Staffas, Ludvika, SE;
Johannes Tredoux, Ludvika, SE;
Mats Holman, Ludvika, SE;
Ulf Åkesson, Ludvika, SE;
Assignee:
ABB Technology AG, , CH;
Primary Examiner:
Int. Cl.
CPC ...
H01H 33/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
A spring operated actuator for an electrical switching apparatus. It has an opening spring and a closing spring, one of them including a torsion spring. The torsion spring is charged in the unwinding direction and discharged in the winding direction.