Abstract: A power transmission device for utility machinery is disclosed, the device including: a) a sleeve supporting a first sheave member having a first face; b) a hub received through said sleeve and moveable axially in relation thereto, said hub supporting a second sheave member having a second face that opposes said first face such that said first and second faces define therebetween a groove adapted to receive a belt and relative axial movement between said sleeve and said hub being adapted to vary at least one of pitch diameter and grip imparted to said belt from said sheaves; and c) an actuator mechanism adapted, through control of relative axial displacement between said sleeve and said hub, to vary at least one of said pitch and grip, said actuator mechanism comprising a control rod disposed substantially perpendicularly to the line of action of said axial displacement and connected to said hub through a link mechanism, said control rod being adapted to rotate and said link mechanism being adapted to transla

Abstract: A power transmission device for utility machinery is disclosed, the device including: a) a sleeve supporting a first sheave member having a first face; b) a hub received through said sleeve and moveable axially in relation thereto, said hub supporting a second sheave member having a second face that opposes said first face such that said first and second faces define therebetween a groove adapted to receive a belt and relative axial movement between said sleeve and said hub being adapted to vary at least one of pitch diameter and grip imparted to said belt from said sheaves; and c) an actuator mechanism adapted, through control of relative axial displacement between said sleeve and said hub, to vary at least one of said pitch and grip, said actuator mechanism comprising a control rod disposed substantially perpendicularly to the line of action of said axial displacement and connected to said hub through a link mechanism, said control rod being adapted to rotate and said link mechanism being adapted to transla

Abstract: A power transmission device for utility machinery is disclosed, the device including: a) a sleeve supporting a first sheave member having a first face; b) a hub received through said sleeve and moveable axially in relation thereto, said hub supporting a second sheave member having a second face that opposes said first face such that said first and second faces define therebetween a groove adapted to receive a belt and relative axial movement between said sleeve and said hub being adapted to vary at least one of pitch diameter and grip imparted to said belt from said sheaves; and c) an actuator mechanism adapted, through control of relative axial displacement between said sleeve and said hub, to vary at least one of said pitch and grip, said actuator mechanism comprising a control rod disposed substantially perpendicularly to the line of action of said axial displacement and connected to said hub through a link mechanism, said control rod being adapted to rotate and said link mechanism being adapted to transla

Abstract: The invention relates to a device for adjusting the width of a sieve opening on combine harvesters so as to permit a quick installation of a new sieve or a quick re-installation of the previously used sieve, whereby enabling the previous width of the sieve opening to be immediately readjusted. The lamellas of the sieve are adjusted by means of an adjusting rail, which is actuated by a transversal shaft and by an adjusting mechanism both of which being mounted in a positionally fixed manner on the sieve housing of the cleaning device. The transversal shaft, to which an upwardly oriented driver is attached, is located underneath the sieve, the driver being connected to the adjusting rail by means of positive locking that can be disengaged by an upward movement of the sieve.

Abstract: A drive mechanism for utility machinery is disclosed. The mechanism includes a driver wheel and a driven wheel that are coupled by means of an endless flexible band trained around outer rims of the driver and driven wheels. The driver wheel is adapted to transmit drive to the driven wheel in a forward direction F along a loaded side of the band. The mechanism further comprises an idler wheel that runs on an outer side of the band and applies an inwardly directed tensioning force to the band on a run of the band that is unloaded when forward drive is being transmitted. A reverse driver is positioned between the idler wheel and the driven wheel on an inner portion of the side of the band that is unloaded during forward drive. The reverse driver is adapted to selectively provide a reverse drive to the band.

Abstract: An anti-wrapping device is described for preventing crop from being wrapped about the central shaft of a reel rotatably supported on side arms of a header of a combine. The device comprises an annular cover plate for securing to the axial end of the reel to prevent the crop from becoming entangled with projections from the reel and a tubular shroud for mounting on the header support arm to surround the central shaft of the reel, the axial end of the shroud being positioned when in use in close proximity to the annular cover plate of the reel to avoid any crop being caught therebetween.

Abstract: A concave arrangement is disclosed for a threshing machine such as a combine harvester 10. The arrangement includes a concave 30 having a moveable rear portion 48 that is adapted to vary the break-over angle presented to straw passing downstream. A flap member 54 is provided that moves jointly with the moveable rear portion 48 and ensures that a gap G between the moveable portion 48 and a later processing stage such as a beater apparatus is kept substantially closed. Variation of the break-over angle influences the length of the straw leaving the threshing machine and the loading of the further separation and cleaning mechanisms.