SPREADER WITH GPS GUIDED SPREAD PATTERN
1 Assignment
0 Petitions
Accused Products
Abstract
A spreader (100) has material storage means (1) for storing a spreadable material (2), a plurality of spinners (5, 6) adapted to receive the material from the storage means and to spread the material (2) on the ground, and a Global Positioning System (GPS) receiver (8) for sensing the position of the spreader (100) and providing an output signal indicative of a position of the spreader to a control means (7). The control means (7) calculates a required pattern and density of material (2) to be spread by the spinners (5, 6) based on a comparison of the actual position of the spreader (A) to a preferred position of the spreader (I), and controls the spinners (5, 6) in order to obtain the required pattern and density of spread material (2). A method of controlling the pattern and density of material spread by a spreader is also disclosed.
49 Citations
31 Claims
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1-19. -19. (canceled)
- 20. A spreader apparatus including material storage means for storing a spreadable material, a first spinner means adapted to spread the spreadable material on a first side of the spreader and a second spinner means adapted to spread the spreadable material on a second side of the spreader opposite the first side, wherein a speed of each said spinner is variable independently of a speed of the other said spinner, and transport means for transporting the spreadable material from the material storage means to the spinners, the transport means operable to supply the spreadable material to the first spinner means at a rate which is independent from a rate at which it supplies spreadable material to the second spinner means, the spreader further including Global Positioning System (GPS) receiver means for sensing the position of the spreader and providing an output signal indicative of a position of the spreader to a control means, wherein the control means calculates a required pattern and density of material to be spread by the spinner means based on a comparison of the position of the spreader to a preferred position of the spreader, and controls a rate at which the transport means transports the material to the spinners, and the speed of each spinner means, in order to obtain the required pattern and density of spread material.
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28. A method of controlling the pattern and density of material spread by a spreader apparatus having a GPS receiver means, a material storage means for storing a spreadable material, a first spinner means adapted to spread the spreadable material on a first side of the spreader and a second spinner means adapted to spread the spreadable material on a second side of the spreader opposite the first side, wherein a speed of each said spinner is variable independently of a speed of the other said spinner, and a transport means for transporting the material from the storage means to the spinners, the method including:
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receiving a signal from the GPS receiver which is indicative of the actual position of the spreader apparatus; comparing the actual position of the spreader apparatus to a preferred position of the spreader apparatus; controlling a rate at which the transport means supplies the spreadable material to the first spinner means independently from a rate at which it supplies spreadable material to the second spinner means; and controlling a rate at which the transport means transports the material to the spinners, and the speed of the spinner means, in order to obtain a required pattern and density of spread material. - View Dependent Claims (29, 30, 31)
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Specification