US PATENT SUBCLASS 72 / 295
.~ By individually non-deforming clamps

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}
295.~ By individually non-deforming clamps {4}
296  DF  .~.~> With coacting relatively movable tool {1}
298  DF  .~.~> With means to rotate clamp about fixed axis {1}
300  DF  .~.~> With interrelated clamp closer and clamp mover
301  DF  .~.~> With bodily motion in fixed path {1}

DEFINITION

Classification: 72/295

By individually nondeforming clamps:

(under subclass 293) Subject matter wherein at least two of said relatively movable work-engaging instrumentalities each have a plurality of opposed solid jaws or surface elements which are made effective, by movement of one or more of said jaws or surface elements, to grip a portion of work frictionally and to hold it securely.

(1) Note. The function of each individual clamp is to immobilize a portion of work; their relative motion, however, induces internal stresses of deforming magnitude in intervening portions of work, to effect bending, twisting, stretching, etc. The relatively movable clamps are thus equivalent to a tool couple. Such tool couples, because of their unique effect, are collected in this subclass area, ahead of "clamp and tool" and "clamp and work forcer" combinations.

(2) Note. The combination of individually nondeforming, relatively movable work clamps and a tool of more conventional type (i.e., which deform work at its point of contact therewith) is found below in subclasses 296+; the usual operation of such a combination is "stretch forming" (see also subclass 305).

SEE OR SEARCH THIS CLASS, SUBCLASS:

305, for plural relatively stationary work clamps and a

relatively movable tool.

308, for a work clamp employed as an active tool (i.e., as a work forcer).