US PATENT SUBCLASS 72 / 351
.~.~.~ With yieldable actuation of work-gripper (e.g., spring-biased blank-holder)

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}
347  DF  .~ Cup or shell drawing (i.e., deep drawing) {2}
350  DF  .~.~ With application of frictional restraining force to work during deformation {1}
351.~.~.~ With yieldable actuation of work-gripper (e.g., spring-biased blank-holder)

DEFINITION

Classification: 72/351

With yieldable actuation of work gripper (e.g., spring biased blank holder):

(under subclass 350) Subject matter wherein the means for actuating said gripper comprises a force responsive (e.g., deformable, resilient, or slipping) element forming part of the force-transmitting train, such element serving to limit the force exerted on and by said gripper.

SEE OR SEARCH THIS CLASS, SUBCLASS:

382, and 396+, for yieldable face portion or auxiliary tool in a tool complex*; such yieldable element frequently has a work-holding function in addition to its deforming function.

431+, for yieldable connection in drive train to a movable tool.

453.1+, for pneumatic- or fluid-actuated tool support.

465.1+, for flexible or yieldable tool or tool support.

SEE OR SEARCH CLASS 83, Cutting,

460, for a clamp driven by yieldable means in a cutting machine.