US PATENT SUBCLASS 451 / 115
.~.~ Of valve and seat


Current as of: June, 1999
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451 /   HD   ABRADING

64  DF  MACHINE {12}
114  DF  .~ By use of plural work holders, without tool {1}
115.~.~ Of valve and seat {3}
116  DF  .~.~.~> Plug cock
117  DF  .~.~.~> Poppet valve
118  DF  .~.~.~> Slide valve


DEFINITION

Classification: 451/115

Of valve and seat:

(under subclass 114) Abrading machine in which the abrading is accomplished by mutual moving contact between plural workpieces intended to be used together to contain and adjustably restrict the flow of fluid.