US PATENT SUBCLASS 451 / 117
.~.~.~ Poppet valve

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


451 /   HD   ABRADING

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

DEFINITION

Classification: 451/117

Poppet valve:

(under subclass 115) Abrading machine by which a poppet valve and its seat are abraded to a fit by mutual moving contact.

SEE OR SEARCH CLASS

408, Cutting by Use of Rotating Axially Moving Tool,

83.5, for a portable valve refitting device involving the use of a cutting tool that turns about an axis and moves along that axis with respect to a workpiece.

409, Gear Cutting, Milling, or Planing,

175+, for a portable valve refitting device involving the use of a milling cutter.