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. 20, 1989
Filed:
Mar. 14, 1988
Robert A Hagan, Roscoe, IL (US);
Ernest W Reinwall, McHenry, IL (US);
Elco Industries, Inc., Rockford, IL (US);
Abstract
A shaft is journaled to rotate in a housing and is formed with an enlarged disc which carries an elastomeric ring. As the shaft rotates, the ring is compressed against and is massaged by protrusions extending axially into the housing and coacting with the ring to apply a retarding torque to the shaft. In one embodiment, the protrusions are semispherical buttons which are formed integrally with the end wall of the housing. In another embodiment, the protrusions are spherical balls which are free to spin in semispherical pockets formed in the end wall of the housing.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile