US PATENT SUBCLASS 123 / 307
.~ Structural projection on working piston causes whirling

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

306  DF  MEANS TO WHIRL FLUID BEFORE, UPON, OR AFTER ENTRY INTO COMBUSTION CHAMBER {3}
307.~ Structural projection on working piston causes whirling

DEFINITION

Classification: 123/307

Structural projection on working piston causes whirling:

(under subclass 306) Subject matter wherein the engine working piston includes some form of projection which induces whirling of the engine fluid in the combustion chamber.

(1) Note. This subclass does not include a piston projection which merely directs the fluid along some nonrotary path. Whirling is rotary motion and is generally about the cylinder axis.