Abstract: A mulching mower deck within which first and second mower blades rotate for cutting grass, having first and second blade chambers positioned adjacent each other and within which respective blades rotate during operation. The first and second blade chambers are generally completely enclosed for generally confining grass clippings within the blade chambers for preventing the clippings from exiting through side or top walls of the mower deck. The first and second blades travel in respective paths which overlap. The first blade is positioned to the right of the second blade with respect to forward operation of the mower deck and travels in a clockwise direction, and the second blade is positioned to the left of the first blade and travels in a counterclockwise direction. An opening is formed between the first and second blade chambers at a location where the blade paths overlap. Edges of the opening are positioned relatively close to the first and second blades near where the blade paths overlap.

Abstract: A mobile implement for mulching which provides complete control of the mulching process and uniformly distributes the mulch back upon the lawn. Grass and leaves are cut using a standard cutting blade. The mass of cut vegetation is then lifted upward into a hammermill by the trailing edge of the rotating cutting blade. The air stream generated by the rotating hammers of the hammermill forces the vegetation against a shear screen. Repeated blows by the hammers chop the vegetation to a controlled size and force it through the screen. A portion of the chopped mulch falls back upon the ground in the area of the trailing quadrant of the implement's path. The remainder of the mulch is forced into the discharge duct and blown uniformly out onto the lawn through the discharge opening of the mower housing. This same system of hardware may be incorporated into either a hand push or a power driven rotary mower as well as a gang unit, mounted on or pulled by a tractor.

Abstract: A combine harvester has a conveying channel for conveying crop material from the combine harvester's cutting mechanism to its threshing mechanism. The conveying channel has several conveying chains, which are guided on a lower deflection drum and on sprockets arranged on an upper drive shaft. A plurality of raking pins extend at a distance on both sides of the combine harvester, roughly parallel to the chain links, and provide a means for preventing the accumulation of grain in the region of upper deflection in the combine harvester. The raking pins have their free ends that protrude beyond the chain links. Furthermore, the raking pins advantageously are constructed as bolts which are attached along with the conveying bars to the conveying chains.