Boom assembly and components thereof

摘要

A boom assembly has an upright stand with a vertical hollow post and on top of which is mounted an elongated hollow boom adjustable in orientation in both vertical and horizontal directions. A linear extention member for the boom is also in the form of a hollow tube. The stand includes a plurality of legs each in the form of a hollow tube and there are a plurality of foot elements such as casters. The different parts of the assembly are secured together by couplings that preferably are the same in each case. Such couplings include a hollow body with an exterior surface of a size and shape to be inserted within an adjacent hollow tube. A pair of laterally-opposite slots continue longitudinally inward from one end of the body. A lateral spreader is of a size and shape to be located within that one end of the body. A lever has one end portion inserted within the spreader to effect spreading thereof upon lateral deflection of the other end of the lever. Carried by the body are adjustable means located inwardly of the open end portion of the body for laterally deflecting the other end of the lever.