Title: Internal seal for the piston of a rotary piston engine

Abstract: A rotary piston engine of the trochoid type is provided with a housing having two end pieces and a shell having a multi-arcuate interior surface in which the piston is rotatably mounted on the eccentric of an eccentric shaft. An internal seal for the piston includes at least one scraper ring arranged to be axially movable in a concentric annular groove in one face of the piston, revolving with the piston, and pressed by spring action against the adjacent end wall of the housing.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Wilmers, Gottlieb (Neuenstadt, DT)
Maurhoff, Gerhard (Neckarsulm, DT)

Application Number: 481867
Filing Date: 1974-06-21
Publication_date: 1976-03-02
Assignee: Audi NSU Auto Union Aktiengesellschaft (Neckarsulm, Wurttemberg, DT); Wankel GmbH (Lindau (Bodensee), DT)
Primary Class(es): 418/142
Other Classes:
US Patent Ref:

3168237	Feb, 1965	Paschke	418/142.
3179331	Apr, 1965	Paschke et al.	418/142.
3396708	Aug, 1968	Tado	418/142.
3718412	Feb, 1973	McCormick	418/142.

Other Refs:
Primary Examiner: Vrablik, John J.
Assistant Examiner:
Attorney: Kane, Dalsimer, Kane, Sullivan and Kurucz