Self-adjusting boat trailer cradle

作者: Lars Johansson

DOI:

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摘要: A boat trailer cradle comprising a stationary supporting framework adapted to be mounted the frame side members of chassis, two-shafted vertically adjustable with respect and carrying four rubber-tired wheels two keel rollers, rubber-wheeled lateral arms pivotally connected between in manner such that upon depression through load hauled up onto it, are swung upwards their laterally boat.

参考文章(6)
Leon J. Aasen, Boat trailer loading guide ,(1978)
Robert K Youtie, Article supporting cradle ,(1958)
Clark E West, Boat-centering apparatus ,(1967)
Motte Patrick, Galets à coussins escamotables ,(1968)