Spacer-spring for rotary piston engines

Details Spacer-spring for rotary piston engines Spacer-spring for rotary piston engines

1974-11-29

1976-12-21

Freeh, William L.

Rotary expansible chamber devices

With mechanical sealing

Seal element between working member and cylinder

277141, F01C 1908

Patent

active

039985725

ABSTRACT:
An oil seal for rotary piston internal combustion engines, and method of making the same, comprising a spacer-spring disposed in a circular groove in the rotary piston end face, and a pair of annular oil scraping rails radially spaced from each other within the groove and urged into sealing engagement with the rotor housing end wall by the spacer-spring. The spring includes a pair of circular concentric bands which rest upon the groove root, and a plurality of circumferentially spaced struts connecting the bands and acting to space the rails from each other against respective groove side walls. A plurality of circumferentially spaced spring legs extend from each of the circular bands generally radially across the groove to engage the radially opposite oil scraping rail and urge the rail against the housing end wall.

REFERENCES:
patent: 3185386 (1965-05-01), Peras
patent: 3314682 (1967-04-01), Peras
patent: 3477732 (1969-11-01), Warrick
patent: 3718412 (1973-02-01), McCormick
patent: 3762728 (1973-10-01), Prasse
patent: 3768936 (1973-10-01), McCormick
patent: 3836296 (1974-09-01), Sakamaki
patent: 3869229 (1975-03-01), Kurio

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