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:
Mar. 16, 1976
Filed:
Oct. 01, 1974
Douglas D Dankel, Kankakee, IL (US);
Roper Corporation, Kankakee, IL (US);
Abstract
A friction clutch for a power driven element such as a rotary blade in which the element is seated on a drive shaft having a flange and an adjacent thread having an associated nut. Adjacent the driven element is a washer assembly which includes a rubber washer and a Bellville washer having its concave side faced toward the rubber washer so as to develop frictional clutching force between the shaft and the power driven element as the nut is tightened, the concavity of the Bellville washer serving to confine the rubber washer against radial expansion and the rubber washer, by its confinement, serving to prevent collapse of the Bellville washer upon severe tightening of the nut.