US PATENT SUBCLASS 72 / 87
.~.~.~ And additional work-engaging tool, circumferentially spaced about axis of work rotation

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}
86  DF  .~.~ Using angularly related roller-couple acting parallel to axis of work rotation {1}
87.~.~.~ And additional work-engaging tool, circumferentially spaced about axis of work rotation

DEFINITION

Classification: 72/87

And additional work-engaging tool, circumferentially spaced about axis of work rotation:

(under subclass 86) Subject matter including at least one additional tool engaging the work for deformation thereof at an area angularly spaced about the work-axis from the area engaged (at any one instant) by the rollers of the roller-couple.