US PATENT SUBCLASS 72 / 400
.~.~ With coacting fixed tool

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

394  DF  BY THREE OR MORE COACTING RELATIVELY MOVABLE TOOLS (I.E., TOOL-COMPLEX) {4}
399  DF  .~ Concurrently actuated tools {2}
400.~.~ With coacting fixed tool {1}
401  DF  .~.~.~> Between generally opposed-stroke tools

DEFINITION

Classification: 72/400

With co-acting fixed tool:

(under subclass 399) Device comprising a passive (i.e., nondriven) work-engaging tool designed and intended to oppose displacement of work which is subjected to deforming force by said movable tools.

(1) Note. The fixed tool may be, for example, a rigid mandrel for supporting the end of a pipe being swaged between opposing hammers. For a yieldable mounted mandrel see subclass 398 above. For an anvil with a yieldable portion see subclass 396.

(2) Note. This and indented subclasses are not limited to devices for treating hollow work; the fixed tool may be, for example, a forming block against which a bar or sheet is forged or bent by two or more concurrently actuated tools.

SEE OR SEARCH THIS CLASS, SUBCLASS:

398, for a loose or yieldably-mounted mandrel between the tools or an opposed-face tool couple.