US PATENT SUBCLASS 137 / 54
.~.~ With multiple valves

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

47  DF  SPEED RESPONSIVE VALVE CONTROL {5}
53  DF  .~ Centrifugal mass type (exclusive of liquid) {5}
54.~.~ With multiple valves

DEFINITION

Classification: 137/54

(under subclass 53) Control systems wherein two or more valves are provided, at least one of said valves being actuated by the speed responsive means.

(1) Note. See the class definition, section 3, for search notes on plural automatic valves in this and related classes.