US PATENT SUBCLASS 72 / 432
.~.~ Including pneumatic or hydraulic connection


Current as of: June, 1999
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72 /   HD   METAL DEFORMING

429  DF  WITH MEANS TO DRIVE TOOL {11}
431  DF  .~ Including yieldable connection in drive train to movable tool {2}
432.~.~ Including pneumatic or hydraulic connection


DEFINITION

Classification: 72/432

Including pneumatic or hydraulic connection:

(under subclass 431) Apparatus wherein the motion-transmitting mechanism includes a gaseous and/or fluid medium.

(1) Note. A fluid medium, per se, is not necessarily yieldable or compressible. Therefore, a system comprising a generator of fluid pressure and a tool- moving motor using that pressure (the system having no pressure-relief device) is normally to be found in subclass 453.1.

SEE OR SEARCH THIS CLASS, SUBCLASS:

453.1, and see (1) Note above.

SEE OR SEARCH CLASS

83, Cutting,

639.1+, for disclosure of fluid-pressure-actuated cutting tool. 173, Tool Driving or Impacting, for disclosure of other hydraulic tool-drive means of general application.