US PATENT SUBCLASS 72 / 453.07
.~.~.~.~ Axially aligned pistons

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}
453.06  DF  .~.~.~ Pressure additive {3}
453.07.~.~.~.~ Axially aligned pistons

DEFINITION

Classification: 72/453.07

Axially aligned pistons:

(under subclass 453.06) Apparatus wherein the first means and the second means forcing the tool toward the work are pneumatic or fluid actuated and wherein each includes piston means, the first and second piston means being connected together in alignment along the direction of movement of the

tool.