drum brake

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A brake in which the friction is caused by a set of shoes that press against the inner surface of a rotating drum.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A form of brake in which friction is applied by pads to the inner surface of a rotating cylinder (the brake drum) connected directly to a wheel

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun hydraulic brake in which friction is applied to the inside of a spinning drum by the brake shoe