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:
Jan. 12, 2010
Filed:
May. 04, 2007
Yuri Spitsberg, Export, PA (US);
Robert M. Slepian, Murrysville, PA (US);
Perry R. Gibson, East Palestine, OH (US);
David A. Parks, Baden, PA (US);
Douglas C. Marks, Murrysville, PA (US);
Paul R. Rakus, Beaver Falls, PA (US);
Nathan J. Weister, Darlington, PA (US);
Henry A. Wehrli, Iii, Monroeville, PA (US);
Yuri Spitsberg, Export, PA (US);
Robert M. Slepian, Murrysville, PA (US);
Perry R. Gibson, East Palestine, OH (US);
David A. Parks, Baden, PA (US);
Douglas C. Marks, Murrysville, PA (US);
Paul R. Rakus, Beaver Falls, PA (US);
Nathan J. Weister, Darlington, PA (US);
Henry A. Wehrli, III, Monroeville, PA (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A spring assembly is provided for a yoke assembly of an electrical switching apparatus including a housing, separable contacts enclosed by the housing, and an operating mechanism structured to open and close the separable contacts. The operating mechanism includes a pole shaft. The yoke assembly is coupled to the pole shaft and is movable among first and second positions corresponding to the separable contacts being closed and open, respectively. The spring assembly includes a number of first springs having a first spring rate and being coupled to the yoke assembly, and a number of second springs having a second spring rate and being coupled to the yoke assembly. The second spring rate is different than the first spring rate. The number of first springs and the number of second springs bias the yoke assembly toward the second position.