Patent ID: 7572199
Filing Date: 2009-08-11
Classification: B62M

Abstract:
1. A mechanism for adjusting spring tension at a derailleur head, comprising: a rotatable orienting washer; a coil spring having a first end fixed relative to the derailleur head and having a second, opposite end rotatably mounted relative to the orienting washer; an adjusting device for rotating said second end of the coil spring relative to the derailleur head, without contacting said orienting washer, to adjust tension of said coil spring, said adjusting device including: a retaining arrangement for releasably retaining said second end of said coil spring at a desired angular position after said second end of the coil spring has been rotated, said retaining arrangement including: a securing and mounting arrangement for securing together said orienting washer, said coil spring, said adjusting device and said retaining arrangement to assemble said mechanism and for mounting said assembled mechanism to the derailleur head and one of a bicycle frame and a derailleur cage.