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. 24, 2012
Filed:
May. 12, 2011
David R. Hennessy, Burnsville, MN (US);
Bastian Brand, Schonungen, DE;
David R. Hennessy, Burnsville, MN (US);
Bastian Brand, Schonungen, DE;
Horton, Inc., Roseville, MN (US);
Abstract
An electromagnetically actuated viscous clutch assembly includes a rotor arranged relative to an axis of rotation, an electromagnetic coil for generating magnetic flux, a housing positioned adjacent to the rotor to create a fluid working chamber therebetween with the housing and the rotor being selectively rotatable relative to one another, an insert extending through the housing and configured to conduct magnetic flux from the electromagnetic coil along a flux path, a valve assembly electromagnetically linked to the insert along the flux path for selectively controlling fluid flow into the working chamber to selectively engage the rotor and the housing, and a plurality of recesses defined in a portion of the housing located at an interior of the flux path to reduce eddy currents.