An adjustment apparatus for adjusting the position of a member on an exercise machine has an inner tube with a series of spaced pinning holes and an outer tube telescopically engaged over the inner tube and having a locator hole for alignment with a selected pinning hole. A lever has a pinning section...http://www.google.com.hk/patents/US6551226?utm_source=gb-gplus-share專利 US6551226 - Adjustment apparatus for exercise machine
