Panitch Schwarze Jacobs & Nadel
Bicycle brake device
 A bicycle brake device includes a curved brake arm that is formed with an elongated slot, an annular retaining seat that has a front end which is formed with a pair of diametrically opposite retaining notches, an annular support seat that has a rear uneven friction face which abuts against one side of the brake arm, a spring unit that is disposed in the support seat to bias the support seat away from the retaining seat, a washer that is provided with an uneven friction face which abuts against an opposite side of the brake arm, and a bolt that has a spherical head and a threaded shank. The threaded shank extends through the retaining seat, the spring unit, the support seat, the elongated slot of the brake arm and the washer. A portion of the spherical head extends into the retaining seat. A brake block has a front face which is provided with a brake pad and a rear face which is provided with a shaft projection that is connected removably to the spherical head and that engages the retaining notches of the retaining seat. A nut engages a distal end of the threaded shank and is rotated relative to the threaded shank so as to retain the spring unit in a compressed state and permit knurled end surfaces of the retaining seat and the support seat to engage one another. 
B
B62L
inventional
Jung-Hua
Li