Abstract: An automatic, self locking clutch system effectuates blade pitch control on concrete finishing trowels. The clutch instantly releases upon the touch of the operator. A trowel has a downwardly projecting, motor-driven rotor comprising a plurality of radially spaced apart finishing blades directly contacting the concrete surface. A handle extends from a rigid frame and terminates in handlebars grasped by an operator. Control arms extend from the blades into contact with a plate to vary pitch by conventionally rotating the blades about their longitudinal axis. A clutch operatively interconnects a lever and a linkage extending to the swash plate. The clutch comprises a tubular housing coaxially receiving a drive shaft that rotatably controls an internal rotor. A set of spring biased, cylindrical rollers are confined within channels defined in the rotor between major and minor lobes thereof.

Abstract: A self-propelled paver that distributes, consolidates, places and finishes polymer concrete to rapidly resurface roadbeds. A mobile, wheeled chassis mounts an adjustable hopper that receives premixed polymer from a mixer truck that precedes the paver. A finishing assembly secured to the chassis has a distribution assembly for applying concrete transversely across the surface, and a trailing finishing screed that surfaces and densifies the concrete. An active, hydraulic suspension dynamically orients the chassis and the finishing assembly with the roadbed. Individual height adjusting cylinders can be extended or contracted by an automatic grade control that logically senses grade through an external string line. The distribution system comprises an open bottom exposing the surface to be paved, and an open top adapted to receive concrete from a trough extending from the hopper. A bidirectional auger is rotatably disposed within a distribution box for moving concrete upon the surface.

Abstract: This disclosure relates to a truck for transporting concentrated loads, particularly chicks, requiring air circulation. The truck includes a body that forms a load space, and equipment for circulating and treating air in the load space. A floor cavity is formed at the bottom of the load space and a ceiling cavity is formed at the top of the load space. In an instance where chicks are transported, the chicks are placed in chick boxes which are stacked in rows in the load space. The stacks are separated and stabilized by spacers and support ducts. The support ducts are connected to the floor and form ducts which conduct air upwardly from the floor cavity. The ducts have air openings formed therein at spaced intervals, and the circulating air moves out of the ducts and directly into the boxes.

Abstract: This disclosure deals with a truck including a vertically movable van and a lift mechanism for raising or lowering the van. The lift mechanism includes two arms pivotally connected in a scissors configuration. The arms are also connected to the truck frame and to the frame of the van in a manner to raise or lower the van as the scissors arms are spread or closed. An extensible power unit is connected between the two arms and is operable to spread or close the arms in order to raise or lower the van. Improved reinforcements are placed on the truck frame to provide the necessary strength.