US PATENT SUBCLASS 451 / 148
.~.~.~.~.~.~.~ Hob

Current as of: June, 1999
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451 /   HD   ABRADING

64  DF  MACHINE {12}
119  DF  .~ Rotary reciprocating tool {2}
120  DF  .~.~ Cylindrical tool {2}
124  DF  .~.~.~ Rectilinear {13}
140  DF  .~.~.~.~ Work rotating {3}
143  DF  .~.~.~.~.~ Rotary work holder {5}
147  DF  .~.~.~.~.~.~ Gear abrader {1}
148.~.~.~.~.~.~.~ Hob

DEFINITION

Classification: 451/148

Hob:

(under subclass 147) Abrading machine in which the grinding tool is formed with a helical groove or tooth on its working surface for meshing with and grinding a gear.