A treadmill has an endless belt trained about a front roller and a rear roller assembly. The front roller is connected between a left frame member and a right frame member of the treadmill frame. The rear roller is also connected between the left frame member and right frame member. A bracket connects...http://www.google.com.au/patents/US5529553?utm_source=gb-gplus-sharePatent US5529553 - Treadmill with belt tensioning adjustment
