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:
May. 10, 2011
Filed:
Jul. 28, 2006
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
A viscous clutch assembly () includes a rotational input structure (), a rotor () attached to the rotational input structure (), a selectively rotatable member () surrounding the rotor () and rotatably supported by the rotational input structure (), an electromagnetic coil () positioned relative to a driven side of the rotor (), a valve assembly () supported by the rotor (), and a magnetic flux circuit for controlling the valve assembly () with magnetic flux generated by the electromagnetic coil (). The valve assembly () includes a cover plate () for regulating flow of a shear fluid. The rotational input structure () comprises a material capable of conducting magnetic flux. The magnetic flux circuit is configured to include no more than four air gaps (G-G).