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:
Nov. 30, 1976
Filed:
Jul. 24, 1975
Nolte V Sproul, Canton, OH (US);
Aspro, Incorporated, Westport, CT (US);
Abstract
A noise-dampened V-grooved sheet metal pulley having one or more adjacent annular V-grooves formed in a wall of a cup-shaped blank. The pulley has tensioned dampening means engaged against or laminated with at least one V-groove wall of the pulley. The dampening means may be a circular metal or plastic material washer trapped and locked during spinning of the pulley between fold layers of a double flange fold of a pulley V-groove wall. The dampening means also may be a thin-walled metal or plastic tubular member conforming to and tensioned during spinning against the inside surface of one or more pulley V-grooves, which provides a laminated groove wall structure. The dampening means also may be a ring-like member, generally L-shaped in cross section, fixed to one portion of the pulley and tensioned against the inside surface of at least one pulley V-groove wall. The dampening means also may comprise air or heat-cured plastic means on an inner pulley wall surface that is trapped and locked during spinning between fold layers of a double flange fold of a pulley V-groove wall. Both multiple and single groove pulleys are provided with dampening means which alter the vibration frequency of the pulleys, resulting in a reduced pulley noise level during pulley operation.