Pressure assisted apex seal with stepped slot

Details Pressure assisted apex seal with stepped slot Pressure assisted apex seal with stepped slot

1990-07-31

1992-06-23

Vrablik, John J.

Rotary expansible chamber devices

With mechanical sealing

Seal on working member periphery separates inlet and outlet...

F01C 1904

Patent

active

051238209

ABSTRACT:
A rotary internal combustion engine includes a rotor with apex seals installed in slots which extend axially through apexes of the rotor. Each slot has stepped side walls which define an inner narrower slot portion and an outer wider slot portion. The portion are joined by a pair of outwardly facing ledges on both sides of the slot. Each apex seal has a outer head which includes a pair of overhanging or cantilevered lips. The width of the overhang is slightly larger than the width of the ledges so that seal-slot contact is made near the outer seal tip.

REFERENCES:
patent: 2866417 (1958-12-01), Nubling
patent: 3207426 (1965-09-01), Gassmann et al.
patent: 3551080 (1970-12-01), Feller
patent: 3758243 (1973-09-01), Fox, Jr.
patent: 3873250 (1975-03-01), Batten
patent: 4317648 (1982-03-01), Shimizu et al.

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