Patent ID: 8210324

Claim:
Device for braking an elongated rotating body ( 1 ), the device comprising: a male cone ( 2 A) and a female cone ( 3 A), both with essentially coaxial conical surfaces ( 5 , 6 ) and both adapted to be slipped onto said body ( 1 ), and one ( 2 A), the male cone ( 2 A) being mounted integrally in rotation with said body ( 1 ), the female cone ( 3 A) being mounted fixed in rotation relative to said body ( 1 ), the female cone ( 3 A) having the shape of a wheel with an axial bore ( 4 ) with one of said coaxial conical surfaces ( 6 ), and the male cone ( 2 A) having a generally tapered shape with a center recess adapted to be slipped onto said body ( 1 ); and a control element ( 8 ) that controls the female cone ( 3 A) and the male cone ( 2 A) by axial relative movement in the direction of drawing-together or separation of the male and female cones, wherein the male cone ( 2 A) is, when the male and female cones ( 2 A, 3 A) are close to one another, corresponding to the braking position, housed inside the axial bore ( 4 ) of the female cone ( 3 A), with said coaxial conical surface ( 5 ) of the male cone being held, by contact with a support, with said coaxial conical surface ( 6 ) of the female cone ( 3 A), and wherein the device comprises at least two pairs of cones ( 2 A, 3 A; 2 B, 3 B), wherein the male ( 2 A, 2 B) and female ( 3 A, 3 B) cones form each of the two pair of cones and wherein said control element ( 8 ) is common to said two pairs ( 2 A, 3 A; 2 B, 3 B) of cones.