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. 01, 2000
Filed:
Feb. 12, 1999
Xiaolan Ai, Stark County, OH (US);
Thomas J Rybkoski, Stark County, OH (US);
The Timken Company, Canton, OH (US);
Abstract
A planetary traction drive transmission has an inner shaft provided with two inner raceways which are presented outwardly and taper downwardly away from each other and an outer ring having two outer raceways which are presented inwardly, surround the inner raceways, and likewise taper downwardly away from each other. In addition, the transmission has tapered rollers arranged in two rows between the opposing inner and outer races. The rollers of each row are on apex and in line contact with the inner and outer raceways between which they are located. Moreover, they are arranged in pairs, with the rollers of each pair being generally aligned and backing each other. Indeed, at their large ends the rollers have conical end faces, and the rollers in each pair contact each other along those conical end faces, there being line contact here as well. In addition, the transmission has a roller carrier provided with axles which extend into the rollers, so that the rollers revolve about and are maintained in position by the axles. Pure rolling contact characterized by the absence of spinning exists between the rollers and the raceways and also between the large end faces of corresponding rollers in the two rows.