US PATENT SUBCLASS 72 / 453.04
.~.~.~.~ Fluid high pressure/mechanical low pressure

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

429  DF  WITH MEANS TO DRIVE TOOL {11}
453.01  DF  .~ Including pneumatic- or fluid-actuated tool support {7}
453.02  DF  .~.~ Multiple or staged drive means {3}
453.03  DF  .~.~.~ With mechanical drive means {1}
453.04.~.~.~.~ Fluid high pressure/mechanical low pressure

DEFINITION

Classification: 72/453.04

Fluid high pressure/mechanical low pressure:

(under subclass 453.03) Apparatus wherein the first means, the fluid means, forcing the tool toward the work serves to urge the tool with relatively high force and wherein the second means, the mechanical means, serves to urge the tool with relatively low force.