| 摘要 |
<p>A U-lock includes a detachable header (2) with extensions (3, 4) that fit around the arms of the U-bar (1) and extend along the length of those arms to provide strength to the U-lock. The header (2) can be used so that its base is locked at the end of the arms of the U-shaped bar (1) or it can be inverted when locking smaller objects so that its base is locked along the lengths of the arms taking up some of the gap between the locked object and the base of the header (2). The header (2) is locked to the arms of the U-shaped bar (1) by a locking mechanism (5, 6, 7) which secures the header (2) to the arms of the U-shaped bar (1) in four different places, two on each arm. The U-lock and header (2) with extensions (3, 4) can also be used in combination with security spacers (11) for further security.</p> |
