Abstract: An improved structural support for attaching an outrigger to a mobile equipment platform is provided that facilitates assembly of the outrigger and platform to the frame of a truck, and establishes a secure yet flexible joint between the outrigger and the platform. The structural support hereof preferably includes a pair of laterally spaced apart, vertically oriented, elongated brackets attached to and depending from the equipment platform for receiving an associated ground-engaging support member of the outrigger, and a bolt assembly for securing the outrigger to the brackets. The support may be employed to bolt an outrigger to a platform pre-positioned on the frame of a truck, with the truck frame interposed between the outrigger and the platform. Spacers may advantageously be interposed between the outrigger and the truck frame so that the structural support may readily accommodate attachment of an equipment platform and outrigger to truck frames of varying dimensions.

Abstract: An improved apparatus is used on a crane to prevent engagement of a block with the outer end portion of a boom. When the block comes within a predetermined distance of the outer end portion of the boom, a detector assembly provides a danger signal. In response to this danger signal, an audio-visual alarm is activated and all control valves which are actuated to a position to cause the block to come in contact with the boom are moved toward to neutral positions. A linkage between a manually actuatable control lever and a control valve for a particular crane function includes a hydraulic cylinder. This cylinder is normally pressurized to a fully extended position, but when a danger signal is received indicating that the block is too close to the boom, the cylinder is retracted. This shortens the linkage and shifts the control valve to a neutral position.