US PATENT SUBCLASS 166 / 332.3
.~.~.~ Ball valve type

Current as of: June, 1999
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166 /   HD   WELLS

316  DF  VALVES, CLOSURES OR CHANGEABLE RESTRICTORS {5}
332.1  DF  .~ Longitudinally movable operator {8}
332.2  DF  .~.~ Having rotational movement {1}
332.3.~.~.~ Ball valve type

DEFINITION

Classification: 166/332.3

Ball valve type:

(under subclass 332.2) Devices wherein the flow regulating device is a spherical member with at least one passage.