Title: Rotary piston engine having a trochoidal piston and annularly-closed axial seals in the piston

Abstract: This invention relates to an improvement in a rotary piston machine comprising a jacket and two side parts forming a housing, inlet and outlet means on said housing, a piston patterned after a saddle-free epitrochoid 1:1 mounted in said housing for rotation on an eccentric shaft, annularly-closed axial seals on the sides of the piston in proximity to the piston edge, and a pair of oppositely-positioned radial seals in said housing, the improvement comprising that the axial seal on each side of the piston is composed of two seal means equidistant with respect to each other and being closed within themselves, and lubricant opening means in said side parts in proximity to at least one of said radial seals, said openings being located essentially in the interstice between said two seal means in any position of the piston, or being covered temporarily at least in part by one of said two seal means.

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Other info:

Inventors: Huf, Franz (Constance, DT)

Application Number: 545200
Filing Date: 1975-01-29
Publication_date: 1976-03-02
Assignee: Dornier System GmbH. (DT)
Primary Class(es): 418/99 418/142
Other Classes:
US Patent Ref:

3111820	Nov, 1963	Atchison	418/99.
3213837	Oct, 1965	Keylwert	418/99.
3814555	Jun, 1974	Casey	418/142.

Other Refs:
Primary Examiner: Vrablik, John J.
Assistant Examiner: Smith, Leonard
Attorney: Bryan; James E.