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:
Oct. 24, 1978
Filed:
Jan. 19, 1977
Nobuo Fukuma, Toyota, JP;
Yoshito Katou, Aichi, JP;
Toyota Jidosha Kogyo Kabushiki Kaisha, Toyota, JP;
Abstract
A method of manufacturing a friction speed change gearing of the type which comprises a housing, inner and outer races, a plurality of cylindrical planetary rollers mounted between the inner and outer races subject to elastic deformation, and a spider member engaging the planetary rollers, wherein the method is characterized by forming a first assembly including the inner race and the planetary rollers and a second assembly including the housing and the outer race, forming a temperature differential between the two assemblies, inserting the first assembly into the outer race in the second assembly and removing the temperature differentiation so that the rollers are uniformly compressed due to a thermal deformation which occurs when the temperature differentiation has been removed.