US PATENT SUBCLASS 29 / 888.04
.~.~ Piston making

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
888  DF  .~ Prime mover or fluid pump making {12}
888.04.~.~ Piston making {6}
888.041  DF  .~.~.~> Repairing, converting, servicing or salvaging
888.042  DF  .~.~.~> Multi-element piston making {1}
888.044  DF  .~.~.~> With assembly or composite article making {4}
888.049  DF  .~.~.~> Ring groove forming or finishing
888.05  DF  .~.~.~> Gudgeon pin, wrist pin, piston pin, or boss therefor
888.051  DF  .~.~.~> With other attaching provision for connecting rod

DEFINITION

Classification: 29/888.04

Piston making:

(under subclass 888) Process for manufacturing (1) a sliding metal cylinder that reciprocates in a tubular housing, either moving against or moved by fluid pressure or (2) a component or part especially adapted for use with (1) not elsewhere classified.

SEE OR SEARCH CLASS

92, Expansible Chamber Devices, appropriate subclass for a piston, per se.

123, Internal-Combustion Engines, appropriate subclass for an internal combustion engine having at least one piston.

219, Electric Heating, for process of electric welding or laser welding.

228, Metal Fusion Bonding, appropriate subclass for a process of making a piston by metallurgical bonding under the class definition.

419, Powder Metallurgy Processes, appropriate subclass for making a piston utilizing powder metallurgy techniques.

451, Abrading, 51+, for a process of grinding a cylinder.