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. 30, 1991
Filed:
May. 17, 1990
Dankwart Eiermann, Weissensberg, DE;
Wankel GmbH, Berlin, DE;
Abstract
A bearing arrangement and drive transmission arrangement of a rotary piston internal combustion engine having trochoidal-shaped casing mantle raceway surfacing and having a triangular piston controlled by a synchronous drive transmission consisting of a hollow gear and a pinion, with which the teeth of the hollow gear are machined or worked out of a piston bore extending over the entire width by impact pushing/cutting and broaching. A further bore is concentrically provided in the piston bore and extends from a side remote from the synchronous drive transmission as far as to the hollow gear and of which teeth only tooth butt ends are left standing upon which a bearing sleeve of the eccentric bearing is pressed thereon. Cooling passages or channels result between the bearing sleeve and the tooth butt ends. Transfer of contact heat from the piston onto the eccentric bearing is considerably reduced by engagement of the bearing sleeve only upon the tooth butt ends.