作者: Clarence A. Anderson , John M. Bloemer
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摘要: An equipment rack incorporating four linked members which mount an support to a hitch insert. The are formed by two pairs of pivotally arms in turn the insert and mounting bracket. Each pair provides three pivot bearings have mutually parallel axes. In collapsed position making up each juxtaposition. extended substantially co-linear. A mechanical link locks when is retracted against rear vehicle.