US PATENT SUBCLASS 72 / 389.6
.~.~.~ Fluid pressure actuated (i.e., hydraulically or pneumatically actuated)

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

380  DF  BY RELATIVELY MOVABLE OFFSET TOOL-FACES (E.G., FOR BENDING OR DRAWING) {4}
386  DF  .~ With tool motion in fixed path {3}
389.1  DF  .~.~ Between and co-planar with opposed tools {8}
389.6.~.~.~ Fluid pressure actuated (i.e., hydraulically or pneumatically actuated) {2}
389.7  DF  .~.~.~.~> Manually pumped (e.g., by use of a hydraulic jack)
389.8  DF  .~.~.~.~> Pivotable opposed tools

DEFINITION

Classification: 72/389.6

Fluid pressure actuated (i.e., hydraulically or pneumatically

actuated):

(under subclass 389.1) Device including a mechanism driven by a gaseous or liquid medium to move one of the tools.