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:
Apr. 24, 1979
Filed:
Sep. 16, 1976
Robert C Bremer, Jr, Brownsburg, IN (US);
Wallace Murray Corporation, New York, NY (US);
Abstract
A torsional vibration damper and method and apparatus for its manufacture. The outer inertia member carries a radially inwardly extending web, the web sandwiched by a pair of elastomer members. A two-piece hub sandwiches the elastomer members, the two hub pieces being held together as by swaging or by rivets. Tooling for the swaging mode of assembly is shown such that the elastomer members are deformed from an original to a final configuration, and the swaging then accomplished with a single continuous movement. The swaging assembly apparatus for the device includes Belleville springs, the apparatus limiting the maximum force applied to that portion of the hub members controlling the assembled elastomer thickness. The damper configuration facilitates low specific energy dissipation and large elastomer-to-metal interface area to thus tend to lower shear stress in the elastomer. In addition, should the elastomer fail in use, the damper inertia mass is mechanically constrained to remain with the hub assembly. The two hub pieces cause radial extrusion of the elastomer, the extruded portions contacting the inertia member, the latter guiding and defining the extrusions.