A drum brake is a brake in which the friction is caused by a set of pads that press against the inner surface of a rotating drum. The drum is connected to a rotating wheel.
... by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent 5,800,311 (1998) by P.S.Chuang.
External links
www.gyrotwister.de ...