US PATENT SUBCLASS 477 / 202
.~.~.~.~ Vacuum actuated brake

Current as of: June, 1999
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477 /   HD   INTERRELATED POWER DELIVERY CONTROLS, INCLUDING ENGINE CONTROL

182  DF  BRAKE CONTROL {8}
199  DF  .~ Brake engaged when engine energy deactivated, brake disengaged when engine energy is activated {1}
200  DF  .~.~ Internal combustion engine {1}
201  DF  .~.~.~ Controls brake valve {1}
202.~.~.~.~ Vacuum actuated brake

DEFINITION

Classification: 477/202

Vacuum actuated brake:

(under subclass 201) Subject matter wherein the fluid within the passage is at a lower pressure than the environment so that as pressure is selectively removed therefrom environmental pressure moves the brake* into a force applying position.