US PATENT SUBCLASS 72 / 90
.~.~.~ Including stationary tool

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

67  DF  BY USE OF TOOL ACTING DURING RELATIVE ROTATION BETWEEN TOOL AND WORK ABOUT INTERNAL CENTER (E.G., GYRATING OR ROTATING TOOL) {10}
80  DF  .~ During rotation of work {12}
88  DF  .~.~ Caused by tools (e.g., "platens") relatively moving parallel to their surface {2}
90.~.~.~ Including stationary tool

DEFINITION

Classification: 72/90

Including stationary tool:

(under subclass 88) Subject matter wherein one of the tools is fixed against movement during metal deformation.