US PATENT SUBCLASS 123 / 41.37
.~.~.~ Hollow piston rod

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

41.01  DF  COOLING {27}
41.34  DF  .~ Internal cooling of moving parts; e.g., hollow valves, pistons, and movable cylinder {3}
41.35  DF  .~.~ Piston {3}
41.37.~.~.~ Hollow piston rod {1}
41.38  DF  .~.~.~.~> Wrist pin type; e.g., nonrigidly connected

DEFINITION

Classification: 123/41.37

(under subclass 41.35) Cooling means wherein the piston rod is hollow or has passages therein for conducting coolant to and/or from the piston.

SEE OR SEARCH CLASS

92, Expansible Chamber Devices,

109+, for a piston having a hollow piston rod.