Abstract: A truck vehicle carried boom system for lifting, transporting, and depositing a load of particulate material such as powder, granules or seeds into storage bins in material dispensing aircraft, including a telescoping boom structure pivotally mounted on support structure which in turn is rigidly secured to the vehicle frame. The boom includes provision for removable carrying a hopper form of load bag. An extensible piston-cylinder hydraulic motor is utilized to obtain various pivotal positions of the boom. The boom telescope disposition is maintained by a mechanical safety pin. The boom is extended and retracted by inertial forces generated by vehicle manipulation. As an auxiliary device a boom safety bar, hydraulically operated is secured to a side portion of the truck bumper structure to provide a safety block when the boom is in the aircraft loading position.

Abstract: A truck vehicle carried boom and hopper system for lifting, transporting, and depositing a load of particulate material such as powder, granules or seeds into storage bins in material dispensing aicraft, including a hopper boom framework having spaced apart side bars pivotally mounted on the side bars on the front end of the vehicle mounted support structure. An extensible piston-cylinder hydraulic motor system is utilized to obtain various pivotal positions of the hopper boom. A manual hopper control valve is located in the bottom of the hopper, the hopper is pivotally mounted on a horizontal axis on the extended end of the boom and a safety bar is secured to a mid-portion of the boom to enable a safety block when the boom is in the aircraft loading position. Between the boom pivotal mounting on the truck frame and the truck frame is a trussed frame support construction which enables rigid pivotal support of the boom and hopper.