US PATENT SUBCLASS 72 / 92
.~.~.~ Non-rotating concave surface


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}
91  DF  .~.~ Caused by rotating tool and opposing concave surface {1}
92.~.~.~ Non-rotating concave surface {1}
93  DF  .~.~.~.~> With means to adjust concave surface


DEFINITION

Classification: 72/92

Nonrotating concave surface:

(under subclass 91) Subject matter wherein the work-engaging face of the second tool is fixed against arcuate movement during deformation.