| 摘要 |
<p>MATERIAL LIFT PLATFORM A hoist for loading and unloading cargo through a side or rear doorway of a van or truck slides from a stored position completely inside the vehicle to an operating position with a lift platform outside the vehicle that can be lowered and raised by an electric winch connected to the platform by cables. The hoist has a pair of generally horizontal telescoping parallel beams guiding a sliding yoke movable by means of the winch to raise and lower the platform through cable runs secured to means at both sides . of the platform. Pivoting side support beams cooperating with stop members upon extension to operating position, and other safety features prevent improper operation. If very heavy loads are to be lifted on to a small vehicle, it may be desirable to brace the vehicle, as by means of a jack at or near the location of the lift platform to avoid tilting the vehicle. The material lift platform of the invention makes it possible to use a small truck or van to carry cargo that would otherwise require the use of a large truck, thus resulting in great fuel economy.</p> |
