| 摘要 |
A security device useful in preventing the theft of bicycles, mopeds and the like comprises a generally U-shaped shackle member (45) having two parallel arms (61,63) connected to one another by an intermediate bight (59). A second member (47), either U-shaped or a bar extends between and engages both of said arms (61,63) and is moveable axially therealong toward or away from the bight (59). Locking means (48) coact with said second member and at least one of said arms (61) to fix the position of the second member with respect to the arms (61,63). The use of longitudinally spaced semicircular grooves (363) on one or both arms cooperating with a spring biased spherical bearing means (355) associated with the second member permits it to be freely positioned along the shackle member. A lock mechanism (371) is used to engage one of said grooves to lock the bar in position. Alternatively, positioning of the second member may be achieved by the use of a pawl (73) and ratchet (65) arrangement which allows the second member to be freely movable in either direction along the arms (61,63) when the device is unlocked, but only in the direction toward the bight (59) when the device is locked. The locking member may be a combination lock (749,849) or may be activated by a key or remote transmitter. When the device includes grooves or ratchet teeth along both arms, a singular lock may be used to simultaneously or sequentially co-act with the two arms. Alteratively, two separate locks may be utilized. The device may also include a compressible and extendible rubber or elastomeric boot (51) preferably in the form of bellows. This boot provides a protective cover around ratchet teeth or semi-circular grooves that are longitudinally spaced along one of the arms (61,63) of the U-shaped member. The boot (57) progressively surrounds the ratchet teeth (65) or grooves as the rod is disengaged or withdrawn from the sleeve. Additional means comprising plastisol coatings and bubble wrap material may be included to protect the various elements of the device and the bike from damage and wear. |
