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:
Aug. 30, 1977
Filed:
Mar. 24, 1976
Roy T Jacks, Sterling Heights, MI (US);
U.S. Manufacturing Corporation, Fraser, MI (US);
Abstract
A torsional damper for reducing the vibrations produced when a shaft is driven by the intermittent application of a discontinuous force thereto, e.g. the crankshaft of an internal combustion engine, comprising an integrally formed disk-like mass having three concentric zones, namely, an inner central zone, an outer annular zone, and an intermediate spring zone therebetween. The spring zone includes narrow, elongated, spirally-arranged, overlapping slots extending axially through the disk and radially between the inner and outer zones to provide spirally-arranged overlapping web portions which act as torsional springs or shock absorbers due to an inherent resiliency. The spirally slotted damper is formed as an integral unit by casting it from a metal such as cast iron with the spiraled slots having a predetermined size and shape to provide the desired damping effect.