Power-take-off safety system
First Claim
1. In combination with a tractor having a power-take-off and a machine being driven by the power-take-off, a safety system for automatically shutting off the power-take-off in an emergency to thereby stop the machine, the safety system comprising:
- at least one machine sensor for detecting the presence of a foreign body adjacent a portion of the machine;
shut-off means, responsive to the sensor, for shutting off the power-take-off when the sensor detects the presence of a foreign body adjacent the machine.
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Accused Products
Abstract
A safety system for automatically shutting off the power-take-off of a tractor in an emergency to thereby stop the machine being driven by the power-take-off. The system includes at least one machine sensor for detecting the presence of a foreign body adjacent a portion of the machine, and a shut-off, responsive to the sensor, for shutting off the power-take-off when the sensor detects the presence of a foreign body adjacent the machine. Sensors can also be provided to monitor the power-take-off shaft The sensors are preferably a photocell. The system optionally include an alarm that sounds when the sensor detects the presence of a foreign body adjacent the machine.
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Citations
16 Claims
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1. In combination with a tractor having a power-take-off and a machine being driven by the power-take-off, a safety system for automatically shutting off the power-take-off in an emergency to thereby stop the machine, the safety system comprising:
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at least one machine sensor for detecting the presence of a foreign body adjacent a portion of the machine; shut-off means, responsive to the sensor, for shutting off the power-take-off when the sensor detects the presence of a foreign body adjacent the machine. - View Dependent Claims (2, 3, 4)
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5. In combination with a tractor having a power-take-off that can be turned on and shut off by a control on the tractor, and a machine being driven by the power-take-off, a safety system for shutting off the power-take-off in an emergency to thereby stop the machine, the safety system comprising:
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at least one machine sensor for detecting the presence of a foreign body adjacent a portion of the machine; shut-off means, responsive to the machine sensor, for operating the control on the tractor to shut off the power-take-off when the sensor detects the presence of a foreign body adjacent the machine. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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13. In combination with a tractor having a power-take-off that can be turned on and shut off by a control on the tractor which is operable between an on position in which the power-takeoff is on and an off position in which the power-take-off is off, and a machine being driven by the power-take-off, a safety system for shutting off the power-take-off in an emergency to thereby stop the machine, the safety system comprising:
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at least one machine sensor mounted on the machine for detecting the presence of a foreign body adjacent a portion of the machine; shut-off means, responsive to the machine sensor, for operating the control on the tractor to the off position to shut off the power-take-off when the machine sensor detects the presence of a foreign body adjacent the machine. - View Dependent Claims (14, 15, 16)
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Specification