US PATENT SUBCLASS 83 / 639.1
.~.~ Fluid pressure actuated

Current as of: June, 1999
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83 /   HD   CUTTING

523  DF  MEANS TO DRIVE OR TO GUIDE TOOL {35}
613  DF  .~ With simple rectilinear reciprocating motion only {13}
639.1.~.~ Fluid pressure actuated {5}
639.2  DF  .~.~.~> Utilizing fluid amplifier
639.3  DF  .~.~.~> Diaphragm
639.4  DF  .~.~.~> Explosive fluid
639.5  DF  .~.~.~> Plural cylinders
639.7  DF  .~.~.~> Offset cutter

DEFINITION

Classification: 83/639.1

Fluid pressure actuated:

(under subclass 613) Apparatus wherein the cutting blade is caused to move in a cutting stroke by an expansible chamber motor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

177, for apparatus wherein the cutting tool itself is a fluid blast or suction, that cooperates with a fixed reaction tool or with a directly opposing second fluid blast.