| 摘要 |
Ramp, for loading and unloading objects such as vehicles, consisting of wheels (2, 2'), for wheeling the ramp on a trailer or a transport-vehicle carrier, as well as longitudinal tracks (1, 1'), with lifting handles on the rear (3, 3'), and with grooves or steps etc., for wheels ant belt grip, or, when especially designed for snowmobiles, with tracks for steering runner (12) and skis (11), and transverse profiles (4, 4') for the belt grip. The longitudinal tracks ( 1, 1') are designed so that the snowmobile skis (11) slide on the track ( 1), while the steering runner (12) does not touch anything as the middle (13) of the track is lower than the rest of the roadway. The longitudinal tracks have an angle (5) of 10-25 degrees in the front end of the ramp, and a taper (6) at the rear of the ramp which ensures that the ramp is flush with the ground when driving up it. At the tracks' inner sides there are holes (10) for adjustment of the transverse profiles (4, 4'). The ramp has spikes (7, 7') under the tracks (1, 1') in the rear, in order to anchor in the snow, as well as two stoppers (8, 8') just behind the wheels to prevent the ramp from sliding when driving onto or off the trailer or motor vehicle. A V-shape (9) is also cut out of the tracks in the rear to prevent friction arising when a snowmobile first is driven onto the ramp.
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