Piston with cast-in undercrown pins for increased heat...

Details Piston with cast-in undercrown pins for increased heat... Piston with cast-in undercrown pins for increased heat...

2005-01-11

2005-01-11

Look, Edward K. (Department: 3745)

Expansible chamber devices

Piston

With ported chamber in piston part for circulating heat...

C123S041380

Reexamination Certificate

active

06840156

ABSTRACT:
A cast engine piston has a crown with a combustion surface and an undercrown for exposure to crankcase fluids. A plurality of pins extend from the undercrown to increase the surface area of the undercrown. The pins draw heat from the crown and dissipate the heat to the crankcase fluids. Crankcase oil may be sprayed, splashed, or misted against the pins to further increase heat dissipation.

REFERENCES:
patent: 1073086 (1913-09-01), Blose
patent: 1741032 (1929-12-01), Minter
patent: 2213418 (1940-09-01), Swanson
patent: 4363293 (1982-12-01), Munoz et al.
patent: 4617888 (1986-10-01), Dent
patent: 5975040 (1999-11-01), Silvonen et al.
patent: 6318243 (2001-11-01), Jones

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