Importance

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Abstract

The crane having a generally trapezoidal frame with a caster wheel at each corner. A mast is mounted on the front of the frame with a brace between each rear corner and top of the mast. Spring loaded pins are used for these connections. A lifting ram is pivotally connected to the mast and to a telescopic boom pivoted on the mast. The frame has a socket on each side and a telescopic leg including inner and outer tubes is mounted in each socket. A spring loaded pin fixes the tubes relative to each other. The end of each leg has a wheel. Each leg can pivot relative to its sleeve to enable raising the leg to position the distal end near the mast. The legs can be disconnected from the sleeves and a locking device prevents removal of the legs.

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First Claim