US PATENT SUBCLASS 142 / 23
.~.~ Hollow cutter head

Current as of: June, 1999
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142 /   HD   WOOD TURNING

*  DD  CIRCULAR SECTION {7}
*  DD  .~ Spiral grooving {2}
23.~.~ Hollow cutter head

DEFINITION

Classification: 142/23

Machines for reducing a stick to a circular section having a spiral groove in its circumference by passing the stock axially through a rotary hollow cutter-head having a chisel-cutter projecting through its circumference toward the axis of the stick.