Piston of a rotary piston engine of trochoid type, having an int

Details Piston of a rotary piston engine of trochoid type, having an int Piston of a rotary piston engine of trochoid type, having an int

1975-10-16

1977-02-01

Husar, C. J.

Rotary expansible chamber devices

With mechanical sealing

Seal element between working member and cylinder

277 86, 277193, F04C 2700

Patent

active

040059537

ABSTRACT:
A piston of a rotary piston engine of trochoid type including an internal seal with a scraper ring of L-shaped cross section arranged axially movable in a concentric annular groove in one end wall of the piston and pressed with spring action against the adjacent end wall of the housing. The scraper ring is sealed off inside the annular groove by an elastic sealing ring arranged between the axial flange of the scraper ring and at least one wall of the groove. The elastic sealing ring consist of two closed metal rings immediately adjacent to each other and having their outer periphery in sealing and axially displaceable contact with the radial flange of the scraper ring. The rings are inserted with a radial play between their inner periphery and the radial inner wall of the annular groove smaller than the radial play between the axial flange and the radial outer wall of the groove. A spring ring is arranged between the radial flange of the scraper ring and the metal rings, pressing the scraping edge of the scraper ring axially against the end wall of the housing and the metal rings axially against each other and sealingly against the bottom of the annular groove.

REFERENCES:
patent: 3506275 (1970-04-01), Moriyama
patent: 3796436 (1974-03-01), Kurio et al.
patent: 3797976 (1974-03-01), Moriya et al.
patent: 3843283 (1974-10-01), Wilmers

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