| 摘要 |
PCT No. PCT/GB92/00382 Sec. 371 Date Sep. 1, 1993 Sec. 102(e) Date Sep. 1, 1993 PCT Filed Mar. 4, 1992 PCT Pub. No. WO92/15476 PCT Pub. Date Sep. 17, 1992.A braking device for a wheeled vehicle such as a cart or trolley includes a braking member which can contact the ground and lift the vehicle to impede further movement thereof, a blocking member which can block the braking member to prevent its contact with the ground, and a trigger which is actuated by a magnet in the ground to release the blocking member and its blocking relationship with the braking member. |
