vacuum brake(redirected from Vacuum brakes)
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Related to Vacuum brakes: Air brakes
vacuum brake[′vak·yəm ‚brāk]
A form of air brake which operates by maintaining low pressure in the actuating cylinder; braking action is produced by opening one side of the cylinder to the atmosphere so that atmospheric pressure, aided in some designs by gravity, applies the brake.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.