Corner seal means for rotary piston type engines
AssigneeToyo Kogyo Co., Ltd.
InventorNoriyuki Kurio
Life of this patent
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Abstract
Rotary piston type internal combustion engine including corner seals adapted to be received in corner seal recesses provided in each corner portion of a rotor, said corner seal comprising a substantially cylindrical body, an axial bore of circular cross-section axially offset from the axis of the body, and a substantially radially extending slot provided in the body at the side opposite to the direction of offset of the bore so as to define a substantially C-shaped cross-section of varying wall thickness. The configuration of the corner seal is effective to provide it with radial resiliency and also ensure uniform contact pressure against the wall surface of the recess throughout the periphery thereof.
Claims4
In a rotary piston type engine comprising a casing which includes a rotor housing with a trochoidal inner peripheral wall and a pair of side housings sealingly secured to the opposite sides of the rotor housing, and a polygonal rotary piston disposed in the casing for rotation relative thereto and having a plurality of apex portions, the rotary piston being provided with apex seals disposed at apex portions thereof, side seals on each end surface of the piston substantially along the periphery thereof and corner seals on each end surface of the piston at the apex portions thereof, characterized by the fact that said corner seal comprises a substantially cylindrical body, an axial bore of circular cross-section radially offset from the axis of the body with the center of said axial bore located below the axis of the body, and a substantially radially extending slot provided in the body at the side opposite to the direction of offset of the bore so as to define a substantially C-shaped cross-section of varying wall thickness.
Dependencies are inferred from the claim text.