Title: Oil seal means for rotary piston engines

Abstract: In a rotary piston engine comprising a casing having a pair of opposed inner side surfaces, and a rotor disposed in the casing and having opposite side surfaces confronting with said inner side surfaces of the casing, an oil seal assembly is positioned in an annular seal groove formed in each side surface of the rotor. The seal assembly comprises a seal ring having an annular lip adapted to be brought into sealing sliding engagement with the inner side surface of the casing, a bellows type spring connected at one end with the seal ring and an annular member connected to the other end of the spring and seated in the seal groove. An auxiliary seal is positioned between the annular member and the wall of the seal groove.

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Inventors: Kurio, Noriyuki (Higashihiroshima, JA)

Application Number: 772132
Filing Date: 1977-02-25
Publication_date: 1978-05-02
Assignee: Toyo Kogyo Co., Ltd. (JA)
Primary Class(es): 277/357 277/379, 277/403, 277/922, 418/142
Other Classes:
US Patent Ref:

3822973	Jul, 1974	Prasse	418/142.
3827701	Aug, 1974	Sakawaki	277/81.
3884602	May, 1975	Phillips	418/142.
3909015	Sep, 1975	Kasahara	277/81.

Other Refs: 1,016,540

Jan, 1966	UK

Primary Examiner: Ross, Herbert F.
Assistant Examiner:
Attorney: Fleit & Jacobson