Rotary expansible chamber devices – With mechanical sealing – Seal on working member periphery separates inlet and outlet...
Patent
1986-12-04
1988-04-19
Vrablik, John J.
Rotary expansible chamber devices
With mechanical sealing
Seal on working member periphery separates inlet and outlet...
418152, 418178, 291564R, 29557, 29DIG13, 29DIG24, 219121EK, 219121PE, 219121PH, 219121LJ, 219121LN, F01C 1902, F01C 122
Patent
active
047386029
ABSTRACT:
A method for manufacturing an apex seal for a rotary piston engine comprising steps of preparing an apex seal blank made of ceramic material, and applying a high energy heating radiation to the sliding surface of the apex seal blank to form a roughened and porous structure on the surface portion of the apex seal blank. The high energy heating radiation is desirably applied to the apex seal blank under a non-oxidizing atmosphere so that an oxidization of the components of the ceramic material can be prevented.
REFERENCES:
patent: B318515 (1967-05-01), Jones
patent: 3658451 (1972-04-01), Gomada
Ohuchi Katsuya
Shimizu Tsutomu
Yamamoto Jun-ichi
Yamamoto Yoshifumi
Mazda Motor Corporation
Vrablik John J.
Walnoha Leonard P.
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