US PATENT SUBCLASS 72 / 353.2
.~.~ By two or more coacting tools movable relative to closed die; e.g., tool complex

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

343  DF  BY USE OF CLOSED-DIE AND COACTING WORK-FORCER (E.G., PUSH-DRAWING) {3}
352  DF  .~ Forcing work into or within closed die; e.g., forging {6}
353.2.~.~ By two or more coacting tools movable relative to closed die; e.g., tool complex {3}
353.4  DF  .~.~.~> Symmetrically expanding tools {1}
354.2  DF  .~.~.~> With tools converging to form annular surface; e.g., segments of closed die
354.6  DF  .~.~.~> One tool telescoping into closed die {2}

DEFINITION

Classification: 72/353.2

By two or more coacting tools movable relative to closed die; e.g., tool complex:

(under subclass 352) Subject matter including a first instrumentality for deforming the work in the closed die, or as it moves the work thereinto; and a second deforming instrumentality also for deforming the work in the closed die, or as it moves the work thereinto; wherein the first and second deforming instrumentalities move relative to each other and relative to the closed die during deformation of the work, in such manner that at some instant during the class type operation the closed die and both of the other deforming instrumentalities are in simultaneous contact with the same work.

(1) Note. The first and second deforming instrumentalities may have any location or any type of stroke. There must be relative motion between the instrumentalities and the closed die during deformation, but any one of the tools may be stationary.

(2) Note. This subclass relates to a closed-die tool-complex*, as distinguished from "plural metal-deforming apparatus" which involves alternately or sequentially advanced and withdrawn tools (or concurrently actuated tools which treat distinct workpieces).

SEE OR SEARCH THIS CLASS, SUBCLASS:

356, for plural (similar or diverse) metal-deforming apparatus, employing at least one closed-die device.

381+, for a tool-complex comprising an offset-face tool couple.

394+, for a tool-complex with opposed-face tools.

471, for a tool-couple with an intermediate tool.