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US 4,330,986 AGranted
Raking machines
AssigneeC. van der Lely N.V.
InventorsAry van der Lely, Cornelis J. G. Bom
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AssigneeC. van der Lely N.V.
InventorsAry van der Lely, Cornelis J. G. Bom
Estimating the term…
A raking machine has at least one circular tined rake member that is rotatable about an upwardly and forwardly inclined axis of rotation. The tines are pivotably mounted on the outer perimeter of the rake member to turn about horizontal pivot axes. Preferably, the diameter of the rake member is defined by the path described by the tips of the tines in operation and is 2 to 3.3 meters. During operation, the tines, viewed in plan are directed outwardly from the perimeter and rearwardly with respect to the direction of rotation so that with travelling speeds over the ground between 6 and 12 kms/hour and when the member is driven at a speed of rotation of 80 rev/min., the tine at the front of the rake member at any moment extends at an angle of about 45.degree. to 90.degree., again viewed in plan, to a line passing through the tip of that tine and tangential to the path of the tine tip with respect to the ground, when the tine tip is located in a vertical plane containing the rotary axis of the rake member and extending in the direction of travel of the machine over the ground. Such a raking machine, with a large diameter rake member, achieves satisfactory raking results within a broad range of travelling speeds, particularly on uneven soil.
A raking machine movable over the ground comprising at least one tined rake member rotatable about an upwardly and forwardly extending axis and driving means connected to rotate said member about said axis, tines pivotably mounted adjacent the outer perimeter of the rake member and said tines with mountings being freely pivotable outwardly to operative positions about generally horizontal axes responsive to centrifugal forces during rotation, each tine being inclined rearwardly in its operative position with respect to a plane that contains the axis of rotation and the pivot point of the tine mounting to the rake member, the center of gravity of said tine mounting being located outwardly from said pivot point during rotation and said tine extending downwardly from that point towards the ground during at least the major part of the rearmost 180.degree. sector of its rotational path, said tine being positioned to contact the ground and rake crop for at least the major part of the foremost 180.degree. sector of its path, said tine being pivotable upwardly about said pivot point responsive to contact with the ground, the angle of said tine to said plane changing during contact with the ground during travel.
A raking machine movable over the ground comprising at least one tined rake member rotatable about an upwardly and forwardly extending axis and driving means connected to rotate said member about said axis, tines pivotably mounted adjacent the outer perimeter of the rake member and said tines with mountings being freely pivotable outwardly to operative positions about generally horizontal axes responsive to centrifugal forces during rotation, each tine being inclined rearwardly in its operative position with respect to a plane that contains the axis of rotation and the pivot point of the tine mounting to the rake member, the center of gravity of said tine mounting being located outwardly from said pivot point during rotation and said tine extending downwardly from that point towards the ground during at least the major part of the rearmost 180.degree. sector of its rotational path, said tine being positioned to contact the ground and rake crop for at least the major part of the foremost 180.degree. sector of its path, a circular, uninterrupted flexible wall mounted on said member and being rotatable with the tines, said wall being positioned substantially above the tines to increase the crop handling capacity of the machine.
A raking machine movable over the ground comprising at least one tined rake member rotatable about an upwardly and forwardly extending axis and driving means connected to rotate said member about said axis, tines pivotably mounted adjacent the outer perimeter of the rake member and said tines with mountings being freely pivotable outwardly to operative positions responsive to centrifugal forces during rotation, the diameter of the rake member defined by the path described by outer tine tips during operation being 2 to 3.3 meters, viewed in plan, each tine being inclined rearwardly in its operative position with respect to the direction of rotation, the center of gravity of said tine mounting being located outwardly from said pivot point during rotation and said tine extending downwardly from that point towards the ground during at least the major part of the rearmost 180.degree. sector of its rotational path, said tine being positioned to contact the ground for at least the major part of the foremost 180.degree. sector of its path, the foremost tine of the machine, when the machine is travelled at a speed between 6 and 12 kms/hour with the rotation of the driven rake member being between 70 and 80 rev/min., at any moment being inclined at an angle of about 45.degree. to 90.degree., again viewed in plan, to a line passing through the tip of said tine and tangential to the path of that tip with respect to the ground, when the tine tip is located in a vertical plane containing the rotary axis of said rake members and extending in the direction of machine travel.
Dependencies are inferred from the claim text.