Piston with oval shaped lands

Details Piston with oval shaped lands Piston with oval shaped lands

1991-06-20

1993-05-18

Denion, Thomas E.

Expansible chamber devices

Piston

Non-circular

92219, 92233, F16J 100, F16J 104

Patent

active

052111016

ABSTRACT:
A piston for an internal combustion engine with a separate head and skirt which are joined by the piston pin. At least one of the upper lands has a reduced diametrical clearance with the cylinder wall in an area perpendicular to the pin direction. The bottom land has a reduced diametrical clearance with the cylinder wall in the pin direction. The lands are oval shaped, the bottom land optionally a truncated oval. At least one of the upper lands can have the shape of two ovals offset by 90.degree. like a cloverleaf.

REFERENCES:
patent: 2130923 (1938-09-01), Jardine
patent: 2309555 (1943-01-01), Venner et al.
patent: 2544494 (1951-03-01), Flint
patent: 4716817 (1988-01-01), Ripberger
patent: 4856417 (1989-08-01), Ishikawa
patent: 4864986 (1989-09-01), Bethel et al.
patent: 4957212 (1990-09-01), Duck et al.

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