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

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

Internet Version by PATENTEC © 1999      Terms of Use


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.