Internal seal for the piston of a rotary piston engine
AssigneesAudi NSU Auto Union Aktiengesellschaft, Wankel GmbH
InventorsGottlieb Wilmers, Gerhard Maurhoff
Life of this patent
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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.
Claims12
An internal seal for the piston of a rotary piston engine or trochoid type with a housing having two end pieces and a shell with multi-arcuate interior surface in which the piston is rotatably mounted on the eccentric of an eccentric shaft, said internal seal having at least one scraper ring arranged axially movable to a concentric annular groove in one face of the piston, said scraper ring is axially movable and adapted to revolve with the piston while being pressed against the adjacent end wall of the housing by spring action, said scrpaer ring comprising spaced scraping edge segments uniformly distributed over the circumference of the scraper ring and adapted to be in contact with the adjacent end wall of the housing, which segments are set obliquely radially outwardly in the direction of rotation of the piston, and the segments being a plurality of individual elastic scraper edge portions of sheet metal.
Dependencies are inferred from the claim text.