Abstract: A combine grain tank has a floor and a pair of fore-and-aft feed augers above the floor for moving grain forwardly along the floor of the tank to a laterally extending trough in the forward end of the floor. A laterally extending discharge auger is mounted in the trough for moving grain laterally along the floor to an auger-type unloading conveyor exteriorly of the grain tank. The discharge auger has constant diameter flighting along its length mounted on an auger tube that has a larger diameter upstream of the point where the feed auger nearest the unloading conveyor feeds grain into the trough.

Abstract: Grain tanks of harvesting machines frequently have an irregularly shaped interior which is difficult to fill completely and to unload. A conveyor system is proposed facilitating loading and unloading of the grain tank. The conveyor system comprises a conveyor arrangement which contains conveyor elements that can be driven and that can be moved vertically depending on the height of the crop deposit. The conveyor arrangement is mounted to the interior wall of the grain tank by a four bar linkage. During the filling process, the conveyor elements act as distributors filling in unused areas of the grain tanks. During the unloading process, they act as conveyors directing grain to the unloading auger.

Abstract: A cleaning arrangement for a combine is equipped with return gutters, inclined and attached to the sides of the cleaning shoe and which serve to capture crop which accumulates on the upper surface of the cleaning shoe, during operation on a slope, and escapes across the side walls of the upper sieve. The crop is conducted by the return gutters to screw conveyors operating in opposite directions which direct the crop to vertical conveyors, which return the crop upstream of the cleaning shoe.

Abstract: In a cleaning device for threshed crop material, the material is introduced into the upstream end of a drum by a coaxial auger feeder. An air flow whirling around the inner wall of the drum is created by a tangentially connected blower. Heavier fractions of the crop material (grain) tend to be flung against the drum wall and leave through grates into a closed conveyor system, creating dynamic air pressure in the drum. Chaff and straw tend to be held in vortex towards the central core of the drum and are discharged axially through the downstream end of the drum. Various alternative embodiments with multiple blowers, multiple air inlets into the drum, recirculation of the cleaning air, finger rakes in various dispositions inside the drum, crop material fed through the blower delivery duct and adjustable baffles for controlling air flow entering the drum are described.

Abstract: A rotary transmission assembly for mounting on a shaft includes a slip clutch for limiting the torque which may be transmitted between a chain sprocket forming part of the transmission assembly and the shaft. The sprocket is rotatably mounted on a hub which may be keyed to the shaft. Adjacent and approximately co-planar radial faces of hub and sprocket both include serrated clutching surfaces. Torque transmission between shaft and sprocket is completed by an annular connecting clutch element having a face including concentric inner and outer annular clutching surfaces having sets of serrations for mating respectively with the clutching surfaces of the hub and sprocket. A compression spring holds the serrations in engagement in normal operation. When a predetermined torque is exceeded, the clutching surfaces separate axially until relative rotation can take place between the sprocket and hub.