US PATENT SUBCLASS 72 / 316
.~ Clamp structure constitutes sole initial metal-deforming force-reaction means (i.e., is passive tool)

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

293  DF  BY USE OF NON-DEFORMING WORK-GRIPPING CLAMP AND RELATIVELY MOVABLE CLAMP, TOOL OR WORK-FORCER {9}
316.~ Clamp structure constitutes sole initial metal-deforming force-reaction means (i.e., is passive tool) {4}
317  DF  .~.~> With plural selectively usable clamps (e.g., tube flarer)
318  DF  .~.~> Deforming indeterminate-length work
319  DF  .~.~> With pivotal tool (e.g., sheet metal bender) {1}
322  DF  .~.~> With die surface extending from clamp jaw {1}

DEFINITION

Classification: 72/316

Clamp structure constitutes sole initial metal-deforming force reaction means (i.e., is passive tool):

(under subclass 293) Subject matter wherein said opposed solid jaws or surface elements, together with any integral or rigid extensions thereof, are designed and intended to furnish the entire resistance to movement or deformation of work when the latter is subjected to forcible engagement by the coacting relatively movable instrumentality, at least during the earlier portion of an operation of the class type.

(1) Note. A device of this subclass employs a work clamp as the passive element of a tool couple (i.e., the clamp functions as anvil or die); in some other types of metal-deforming devices a work clamp, if present, may contribute little or no reaction force and serve merely as a positioning means for work. (See subclass 293 for disclosures of such devices).

(2) Note. Clamp structure within the meaning of the subclass definition may comprise, for example, an actuated work-gripping jaw cooperating with the press bed or anvil itself; the bed or anvil then constitutes an integral extension of clamp jaw proper.

(3) Note. Other structure may be provided to assume more or less of the reaction force subsequent to initial displacement of work material; for auxiliary shape-imparting (die) structure rigid with the clamp, see subclasses 320+ and 322+.

(4) Note. Many of the devices in the preceding subclasses employ clamps which meet the limitations of this subclass; a search on this feature will therefore involve most of subclasses 293+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

67+, for deformation of work held or clamped by various means and operated upon by a tool rotating or gyrating about a motion center within the confines of the work.