| 摘要 |
The present invention relates to brakes mounted in particular on all terrain bicycles. It relates, as to the first embodiment, to a brake comprising identical arms ( 17 ) mounted freely in rotation on trunnions, carrying for each of the arms ( 17 ) at its upper portion a hollow V shaped cam ( 23 ) pierced at its middle, the angle of the dihedral of about 90°, the bisecting edge horizontal, which receives a pin ( 9 ) carrying a cam finger ( 21 ) which acts against the cam ( 23 ) to close the brake. The pin ( 9 ) is secured to the end ( 3 ) of the movable arch ( 1 ) which controls the action of the brake with a movement of rotation from holes ( 4, 5 ) located in the upper central portion of the arch ( 1 ). Compression springs ( 26 ) disposed about pins ( 9 ) ensure the holding and return of the arms ( 17 ) into position.
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