US PATENT SUBCLASS 303 / 128
.~.~ For a railway vehicle (e.g., train)


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

121  DF  SPEED-CONTROLLED {44}
127  DF  .~ Pneumatic {1}
128.~.~ For a railway vehicle (e.g., train) {7}
129  DF  .~.~.~> With speed governor (hydraulic or inertia) {1}
131  DF  .~.~.~> Plural similar inputs
132  DF  .~.~.~> Speed responsive and other conditions (e.g., acceleration, pressure, track hazard, friction)
133  DF  .~.~.~> Traction control
134  DF  .~.~.~> Compared to fixed reference
135  DF  .~.~.~> Automatic
136  DF  .~.~.~> Pseudo-speed


DEFINITION

Classification: 303/128

For a railway vehicle (e.g., train):

(under subclass 127) Pneumatic speed control for a conveyance which rides on a predetermined path; e.g., track.