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:
Feb. 23, 1993
Filed:
Jun. 03, 1991
Tsutomu Amao, Tokyo, JP;
A & S Corporation, Tokyo, JP;
Abstract
A friction welding method for joining a rim and a disc of a disc wheel and an apparatus therefore wherein an outside material or a rim and an inside material or a disc, each of which is a component of a disc wheel, are joined together. This friction welding apparatus comprises, typically, a mechanism for fixing firmly the circumference of one material almost entirely circumferentially, a mechanism for rotating another material, a mechanism for generating frictional heat between the two materials, with the inside material fitted into the outside material, by pressurizing the rotated material to the fixed material. This method employs a lap joint process instead of a butt joint process. Either or both of the materials can be provided with a projection on the circumference. A projection absorbs the turning force, inertia force and braking force produced at the time of joining operation to prevent the above forces from being concentrated on a local portion of the materials in process. This prevents the finished products from deformation.