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:
Jun. 29, 2004
Filed:
Aug. 19, 2002
Kevin B. Weiss, Stillwater, MN (US);
Nexen Group, Inc., Vadnais Heights, MN (US);
Abstract
A rotational control apparatus ( ) includes multiple facings ( ) which sandwich multiple friction plates ( ) rotatable with. To create turbulent air flow, the friction plates ( ) include an undulating outer circumferential edge ( ) and a plurality of passages ( ) in the interface portion and overlapping the inner peripheries ( ) of the facings ( ). An automotive clutch release type bearing ( ) directly abuts between and is encapsulated in the piston cavity ( ) and a cavity ( ) of a piston and a cavity ( ) formed in the friction facing ( ). The friction facing ( ) engages the axial end ( ) of the air chamber ( ) and in alternate form, a friction facing ( ) of the piston ( ) interfaces with an interface surface ( ) intergrally formed on the hub ( ) to control rotation of the hub ( ) when the facings ( ) and the friction plates ( ) are disengaged.