US PATENT SUBCLASS 123 / 41.34-- .~ Internal cooling of moving parts; e.g., hollow valves, pistons, and movable cylinder

US PATENT SUBCLASS 123 / 41.34
.~ Internal cooling of moving parts; e.g., hollow valves, pistons, and movable cylinder

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

41.01	DF	COOLING {27}
41.34		.~ Internal cooling of moving parts; e.g., hollow valves, pistons, and movable cylinder {3}
41.35	DF	.~.~> Piston {3}
41.4	DF	.~.~> Rotary valves
41.41	DF	.~.~> Poppet-type valves

DEFINITION

Classification: 123/41.34

(under subclass 41.01) Cooling means in which various movable elements of the engine have their inside surfaces, which are not exposed to combustion, cooperating surfaces, or direct atmosphere, cooled.

(1) Note. Movable elements in this subclass and in indented subclasses comprise pistons, cylinders, valves, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41.16, for pistons and valves having a coolant sealed therein.

41.56+, for air cooled pistons which do not have a definite fluid receiving compartment.

41.76+, for valve seats and valve stem guide cooling by fluid circulating in a jacket.

SEE OR SEARCH CLASS 92, Expansible Chamber Devices,

173, for a piston having an enclosed insulating space therein; subclass 186 for a piston having a ported chamber therein for circulating a heat exchange fluid; subclass 239 for a piston provided with heat radiating rib means.