Piston for internal combustion engines and like machines

Details Piston for internal combustion engines and like machines Piston for internal combustion engines and like machines

1992-12-10

1994-04-26

Look, Edward K.

Expansible chamber devices

Piston

With separable means for pivotally mounting connecting rod...

92221, 92256, F16J 114, F01B 3100

Patent

active

053056841

ABSTRACT:
A piston for a combustion engine includes an external cylindrical body having an inner cavity. In the inner cavity is a partly spherical little-end of a connecting rod and a fluidtight shell or hemispherical dome. An edge portion of the dome is annularly connected a lower part of the cylindrical body so that the shell or dome bears on the little-end along a closed circular contact line or band during rest or minimum pressure parts of the cycle of operation. Oil is supplied under pressure and through a check valve to into an interstice between the little-end and the shell above the contact line. An upper incompressible space is provided between an outer surface of the shell and the cavity. The shell is maintained taut in operation between the little-end and an annular zone by which the edge portion is connected to the lower part of the cylindrical body. The shell is sufficiently thick but resilient to ensure that the shell is capable 1) of transmitting to the little-end the forces exerted by the working gas on the piston through the annular zone, and 2) of deforming under a tension resulting from these same forces, so that the volume of the interstice is cyclically reduced and the area of the contact band increases.

REFERENCES:
patent: 1637765 (1927-08-01), Comstock
patent: 1763625 (1930-06-01), Mellor
patent: 2317004 (1943-04-01), Wallgren et al.
patent: 3056358 (1962-10-01), Pedersen et al.
patent: 4531269 (1985-07-01), LaBouff
patent: 4938121 (1990-07-01), Melchior

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