Abstract: A cleaning system for a combine harvester includes a fan, at least one duct having an interior passageway that is positioned to receive an air stream from the fan, and a surface defined within the interior passageway of the at least one duct that is configured to restrict a volume of the flow of air passing through the at least one duct and increase a pressure of the air stream passing through the duct.

Abstract: An agricultural harvester includes a straw walker arrangement positioned downstream from a threshing and separating system. The straw walker arrangement includes a first straw walker positioned to receive crop material from the threshing and separating system, a second straw walker positioned downstream from the first straw walker, and a rotatable drum positioned between the first straw walker and the second straw walker. The rotatable drum is operable to convey crop material from the first straw walker to the second straw walker.

Abstract: A combine harvester having a cleaning system with at least one cleaner assembly for cleaning the harvested and a drive assembly connected to the cleaning system to drive the cleaning system, thereby driving the at least one cleaner assembly to perform a reciprocating cleaner movement. The drive assembly comprises a variable speed drive assembly with a rotary drive comprising a rotatable output shaft for driving the cleaning system, a transmission to connect the rotatable output shaft to the at least one cleaner assembly, the transmission configured to convert an angular movement of the rotatable output shaft to the reciprocating cleaner movement, and a control unit to control an angular velocity of the rotatable output shaft based on an input signal.

Abstract: A straw walker for a combine harvester includes a straw walker grate provided with through-openings for grain to be separated and with driving profiles arranged along the straw walker grate at a mutual distance from one another. The driving profiles extend transversely to the conveying direction and include a first respective profile limb upwardly protruding from the straw walker grate. In order to provide advantageous conveying conditions, the driving profiles also include a second respective profile limb descends in the conveying direction towards the straw walkers grate. The second respective profile limb is provided between the first respective profile limb and the straw walker grate on the breast side of the driving profiles. The breast side of the driving profiles is at the rear of the driving profiles in the conveying direction.

Abstract: The invention describes a straw walker for a combine harvester, comprising a straw walker grate (2) provided with through-openings (3) for the grain to be separated and with driving profiles (5, 6) which are arranged along the straw walker grate (2) at a mutual distance from one another, which extend transversely to the conveying direction and which comprise a profile limb (7) upwardly protruding from the straw walker grate (2). In order to provide advantageous conveying conditions it is proposed that a profile limb (8) descending in the conveying direction towards the straw walkers grate (2) is provided between the profile limb (7) upwardly protruding from the straw walker grate (2) and the straw walker grate (2) on the breast side of the driving profiles (5, 6) which is at the front in the conveying direction.

Abstract: An agricultural harvesting machine having a threshing and separating mechanism for threshing and separating crop material; and cleaning mechanisms for cleaning the threshed and separated crop material. The cleaning mechanism comprising: a grain pan for receiving threshed and separated crop material and transporting the latter rearwardly; and an upper and lower sieves installed behind the grain pan and operable to receive the material from the grain pan and move it through and along. At least one portion of the grain pan is inclined in a sideways direction for sideways movement of the threshed and separated crop material while it is being transported rearwardly towards the sieve. This inclination spreads out the surplus of crop material supplied to one longitudinal section of the grain pan and delivers it in an even pattern to the front section of the upper sieve.

Abstract: Conventional agricultural combines are equipped with straw walkers for separating grain entrapped in the threshed crop mat. A rotary separator having two transverse rotors arranged one behind the other is positioned above the straw walkers. The rotors can be driven in the same or in opposite directions and are provided with tines for penetrating the crop mat. The tines are rotatively mounted to an eccentric axle located in the rotor housing.

Abstract: A supplementary separator for a combine having straw walkers. The supplementary separator comprising a rotor transversely arranged above the straw walkers. The rotor is provided with a rotatable housing having an eccentric axle located therein. A plurality of freely rotatable tines are mounted to the eccentric axle and extend outwardly from the rotor housing for engaging the crop mat on the straw walkers. The rotor is rotated to overshot convey the crop mat on the straw walkers.

Abstract: An agricultural harvesting machine having a threshing and separating mechanism for threshing and separating crop material; and cleaning mechanism for cleaning the threshed and separated crop material. The cleaning mechanism comprising: a grain pan for receiving threshed and separated crop material and transporting the latter rearwardly; and an upper and lower sieves installed behind said grain pan and operable to receive the material from said grain pan and move it through and along. At least one portion of said grain pan is inclined in a sideways direction for sideways movement of said threshed and separated crop material while it is being transported rearwardly towards said sieve. This inclination spreads out the surplus of crop material supplied to one longitudinal section of the grain pan and delivers it in an even pattern to the front section of the upper sieve.

Abstract: A crop processing arrangement (28) is proposed with a cylindrical rotor housing (42), an eccentric axle (44) rotatively supported in bearings therein and tines (46) rotatively supported in bearings on the eccentric axle (44). The transverse inclination of the tines can be varied by shifting the axial position of the eccentric axle relative to the cylindrical rotor housing. In this way a loosening and sideways movement of the crop conveyed by the tines (46) is attained with a relatively simple mechanism.

Abstract: A self-propelling harvester thresher has a threshing unit, a hurdle shaking unit located after the threshing unit, a crankshaft, a plurality of transporting prongs which are drivingly controlled by the crankshaft and arranged above the hurdle shaking unit, a rake associated with the transporting prongs and including a plurality of individual passively turnable fingers arranged at a distance from one another so that the transporting prongs pass during an operation between the fingers, and a structure for drivingly positively controlling a turning movement of the fingers.

Abstract: The invention provides an improved ripple pan which compensates for the over-deposition of threshed grain onto the outer portions of the grain pan by channeling the grain to the center of the pan. The pan has a central section with ripples that are perpendicular to the flow of the grain, and two outer sections with outer edges that are elevated above the central section. The ripples on the two outer sections are biased such that the outer edges of the ripples are located rearward of the inner edges of the ripples. An alternate embodiment of this invention solves the problem of excessive grain deposition in the central section of the ripple pan. This embodiment has two outer sections configured similarly to the first embodiment and a central section with a center peak which slopes downward on either side of the peak to the inner edges of the outer sections.

Abstract: An improvement to the grid racks (100) in the straw walker portion of a grain combine; wherein, the grid racks (100) are provided with a plurality of apertured steps (101)(102)(103), etc. and raised side walls (108)( 109); and, the improvement comprises a plurality of auxiliary saw toothed units (12) and (13) mounted on the apertured steps (101)(102)(103), etc. of the grid racks (100) and a saw tooth panel unit (17) mounted on the sides (108)(109) of the grid rack (100) to aggressively process stalks or straw passing through the straw walker portion of the combine.

Abstract: A straw walker for an agricultural combine includes a linear, elongated body having a lower, generally horizontal, sieve-like panel and a pair of spaced, generally vertical sidewalls. The upper edge of each of the spaced sidewalls is provided with a plurality of generally V-shaped teeth for agitating a chaff and grain mixture and moving the chaff rearward for discharge from the rear of the combine. Various elements are attached to the upper surface of the straw walker's lower panel for improving the separation of the grain from the chaff. Each of these elements includes at least one elongated, linear blade-like member having a plurality of spaced teeth on an upper edge thereof. Increased spacing of the teeth in the blade-like member allows the chaff and grain mixture along the center of the straw walker to be displaced rearwardly faster than the mixture along the edges of the walker for improved agitation of the mixture and separation of the grain from the chaff as well as faster chaff discharge.

Abstract: Straw walker bearing having two bearing portions that are bolted together around a straw walker crank. The upper bearing portion is provided with mounting pads for mounting the straw walker pan to the bearing. Each bearing portion has a semi-cylindrical recess for accommodating the straw walker crank. Each bearing portion is provided with a first edge having a raised outer lip and a second edge having a raised inner lip. When the bearing portions are coupled to one another the edges adjoin and form a standard fit configuration or a tight fit configuration.

Abstract: In a conventional combine harvester which includes straw walkers which move in an orbital path so as to lift and move straw rearwardly along the straw walkers there is provided an improved attachment device including a surface which is inclined from a front edge upwardly and rearwardly to a rear edge at a position elevated above the saw-toothed side edge of the straw walker and at least one supplementary saw-toothed element positioned at the surface and having a saw-toothed upper edge for lifting straw over the surface and along the remainder of the straw walker. The attachment improves the separation action of the straw walkers and causes more grain to escape from the straw at the attachment with the grain then sliding downwardly and forwardly from the surface through perforations in the straw walker for collection on the conventional shoe.

Abstract: A harvester thresher has a housing, several straw shakers located after the threshing device having a discharge end, a threshing and separating device having two lateral product outlet openings, a chopper having two opposite ends, and passages each connected with a respective one of the product outlet openings of the threshing and separating device and having an end located above a respective one of the ends of the chopper.