US PATENT SUBCLASS 83 / 639.5
.~.~.~ Plural cylinders

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  DF  .~.~ Fluid pressure actuated {5}
639.5.~.~.~ Plural cylinders

DEFINITION

Classification: 83/639.5

Plural cylinders:

(under subclass 639.1) Apparatus wherein the cutting blade(s) is caused to move by more than one expansible chamber motor.

(1) Note. A single blade driven by plural cylinders is included herein, as is a device including a blade driven by a first cylinder and a second blade driven by a second cylinder.