Apex seal device for use in rotary piston engine

Details Apex seal device for use in rotary piston engine Apex seal device for use in rotary piston engine

1974-10-16

1978-02-28

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

418122, F16J 1548

Patent

active

040762610

ABSTRACT:
An apex seal device includes an apex seal fitted in an apex seal groove defined in a crest portion of a rotor and an apex seal spring confined between the bottom surface of the apex seal groove and the bottom surface of the apex seal, the bottom surface of the apex seal being so inclined to the horizontal line in its cross section parallel with the rotating plane of the rotor that a component of a force exerted by said spring in the direction perpendicular to the radial center line of the apex seal is directed opposite to the rotating direction of the rotor. Thus, the apex seal is biased against the radially extending wall surface of the apex seal groove on the side opposite to the rotating direction of the rotor, leaving a sufficient clearance between the radially extending wall surface of the apex seal groove opposing to the firstly referred wall surface thereof and the side surface of the apex seal to introduce a combustion gas pressure through said clearance so as to cause said pressure to act on the inclined bottom of said seal groove. This apex seal well resists a sharp pressure rise in a combustion chamber to thereby prevent the blow-through of a combustion gas.

REFERENCES:
patent: 3118595 (1964-01-01), Fuhrmann

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