US PATENT SUBCLASS 303 / 34
.~.~ Rotary type


Current as of: June, 1999
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303 /   HD   FLUID-PRESSURE AND ANALOGOUS BRAKE SYSTEMS

28  DF  AUTOMATIC {13}
33  DF  .~ Equalizing valves {1}
34.~.~ Rotary type


DEFINITION

Classification: 303/34

A valve in which a diaphragm moving upon the rise and fall of pressure in the control-pipe operates a rotary valve to perform the equalizing-valve functions, as set forth in the preceding subclass.

(1) Note. These valve structures may have functions in addition to those of the plain triple type, in which case the patents will be cross-referenced into the appropriate subclass.