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:
Sep. 16, 2014
Filed:
Sep. 14, 2012
Patrick R. Fischer-carne, New Smyrna Beach, FL (US);
Robert S. Karnbach, Lake Mary, FL (US);
Rahul Pawar, Lake Mary, FL (US);
Patrick R. Fischer-Carne, New Smyrna Beach, FL (US);
Robert S. Karnbach, Lake Mary, FL (US);
Rahul Pawar, Lake Mary, FL (US);
ABB Technology AG, Zurich, CH;
Abstract
A contact arm assembly () for a switchgear circuit breaker includes a contact arm () having a groove () in an outer periphery surface thereof. At least one contact finger () has a body () and a ball member () extending from the body. The ball member is received in the groove so that the contact finger makes contact with the contact arm. The contact arm includes a shaft () having a longitudinal axis, first and second ends (), and a constant outside diameter. A plurality of annular rings () extends from the outside diameter of the shaft. The rings are spaced along the longitudinal axis to define cooling fins. Diameters of the rings gradually decrease from the first end to generally the center of the shaft, and then gradually increase to the second end of the shaft.