최소 단어 이상 선택하여야 합니다.
최대 10 단어까지만 선택 가능합니다.
다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
NTIS 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
DataON 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Edison 바로가기다음과 같은 기능을 한번의 로그인으로 사용 할 수 있습니다.
Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0100211 (2002-03-13) |
등록번호 | US-9724840 (2017-08-08) |
발명자 / 주소 |
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출원인 / 주소 |
|
인용정보 | 피인용 횟수 : 0 인용 특허 : 398 |
Machines with safety systems are disclosed. The machine may take the form of woodworking machines including table saws, band saws, miter saws, hand-held circular saws, pneumatic chop saws, radial-arm saws, jointers, planars, routers and shapers. The machines may include an operative structure config
Machines with safety systems are disclosed. The machine may take the form of woodworking machines including table saws, band saws, miter saws, hand-held circular saws, pneumatic chop saws, radial-arm saws, jointers, planars, routers and shapers. The machines may include an operative structure configured to perform a task, where the operative structure includes a cutting tool adapted to move in at least one motion, and a safety system adapted to detect the occurrence of an unsafe condition between a person and the cutting tool and for mitigating the unsafe condition. The safety system may include a detection subsystem and a reaction subsystem.
1. A machine comprising: an operative structure adapted to perform a task, where the operative structure includes a circular blade having a perimeter and teeth disposed about the perimeter, where the blade is adapted to spin, and where the blade when spinning cuts an object that moves into contact w
1. A machine comprising: an operative structure adapted to perform a task, where the operative structure includes a circular blade having a perimeter and teeth disposed about the perimeter, where the blade is adapted to spin, and where the blade when spinning cuts an object that moves into contact with the teeth;an electronic detection circuit including an electrical connection to the blade, where the electronic detection circuit is configured to detect when a person is in contact with the teeth when the blade is spinning; andan electrically triggerable actuator supported by the operative structure and electrically connected to the electronic detection circuit, where the actuator generates a force that causes the blade to stop cutting the person within 10 milliseconds after being triggered if the person moves into contact with the teeth at a rate of one foot per second or less. 2. The machine of claim 1 where the actuator causes the blade to stop cutting the person within 2 to 10 milliseconds after being triggered if the person moves into contact with the teeth at a rate of one foot per second or less. 3. The machine of claim 2 where the operative structure includes a work surface and an arbor block that supports the blade, where the arbor block is pivotable between a raised position with at least a portion of the blade above the work surface and a retracted position where the blade is below the work surface, and where the force causes the arbor block to pivot from the raised position to the retracted position to cause the blade to stop cutting the person. 4. The machine of claim 2 where the actuator has an extending portion and a fixed portion, where the force moves the extending portion relative to the fixed portion, and where movement of the extending portion causes the blade to stop cutting the person. 5. The machine of claim 2 further comprising one or both of an arbor block and a brake pawl, and where the actuator acts on the arbor block or the brake pawl. 6. The machine of claim 2 further comprising an electronic firing circuit connected to the electronic detection circuit and to the actuator to trigger the actuator, where the electronic firing circuit generates a trigger signal to trigger the actuator when the electronic detection circuit detects the contact, and where the machine further comprises a brake mechanism adapted to stop the spinning of the blade within 2 to 10 milliseconds after the actuator is triggered. 7. The machine of claim 2 further comprising an electronic firing circuit connected to the electronic detection circuit and to the actuator to trigger the actuator, where the electronic firing circuit outputs electric current to a component of the actuator to heat the component and thereby trigger the actuator. 8. The machine of claim 1, where the electronic detection circuit includes an oscillator that generates an oscillating signal, where the oscillating signal is imparted on the blade through the electrical connection, where the electronic detection circuit further includes a controller that detects a change in the oscillating signal on the blade indicative of the person being in contact with the teeth when the blade is spinning, and further comprising an electronic firing circuit connected to the electronic detection circuit and to the actuator to trigger the actuator, where the electronic firing circuit generates a trigger signal when the controller detects the change in the oscillating signal on the blade, and where the trigger signal triggers the actuator. 9. A machine comprising: an operative structure adapted to perform a task, where the operative structure includes a circular blade having a perimeter and teeth disposed about the perimeter, where the blade is adapted to spin; anda safety system adapted to detect the occurrence of contact between a person and the blade when the blade is spinning, where the safety system includes an electronic circuit adapted to detect the contact, and a reaction subsystem electrically connected to the electronic circuit and adapted to mitigate injury from the contact;where the reaction subsystem includes an electrically triggerable actuator supported by the operative structure and connected to the electronic circuit, where the electronic circuit triggers the actuator upon detection of the contact, and where the actuator generates a force that causes the blade to stop cutting the person within 10 milliseconds after being triggered if the person moves into contact with the teeth at a rate of one foot per second or less; andwhere the reaction subsystem includes a brake mechanism adapted to stop the spinning of the blade within 10 milliseconds after the actuator is triggered. 10. The machine of claim 9 where the blade has a diameter between 9.5 and 10.5 inches. 11. The machine of claim 9 where the blade is a dado cutter. 12. The machine of claim 9 where the machine is a table saw, and where the operative structure includes a table with an opening through which at least part of the blade can extend. 13. The machine of claim 9 where the machine is a hand-held circular saw, and where the operative structure includes a motor configured to drive the blade. 14. The machine of claim 9 where the machine is a miter saw, where the operative structure includes a base defining a cutting zone, a pivot arm attached to the base to pivot toward and away from the cutting zone, and a motor to drive the blade, and where the blade is supported by the pivot arm. 15. The machine of claim 9 where the machine is a radial arm saw, and where the operative structure includes a base, a guide arm, and a carriage slidably coupled to the guide arm. 16. The machine of claim 9 where the brake mechanism is adapted to stop the spinning of the blade within 7 milliseconds after the actuator is triggered. 17. The machine of claim 9 where the brake mechanism is adapted to stop the spinning of the blade within 5 milliseconds after the actuator is triggered. 18. The machine of claim 9 where the brake mechanism is adapted to stop the spinning of the blade within less than 5 milliseconds after the actuator is triggered. 19. The machine of claim 9 where the actuator causes the blade to stop cutting the person within 2 to 10 milliseconds after being triggered if the person moves into contact with the teeth at a rate of one foot per second or less, and where the brake mechanism is adapted to stop the spinning of the blade within 2 to 10 milliseconds after the actuator is triggered. 20. The machine of claim 19 where the electronic circuit includes an oscillator that generates an oscillating signal, where the electronic circuit also includes an electrical connection between the oscillator and the blade, where the oscillating signal is imparted on the blade through the electrical connection, where the electronic circuit further includes a controller that detects a change in the oscillating signal on the blade indicative of the person being in contact with the blade when the blade is spinning, where the electronic circuit generates a trigger signal when the controller detects the change in the oscillating signal on the blade, and where the trigger signal triggers the actuator. 21. The machine of claim 20, where the electrical connection between the oscillator and the blade comprises a capacitive coupling. 22. The machine of claim 21, where the capacitive coupling comprises a plate adjacent the blade. 23. The machine of claim 19 where the brake mechanism includes a pawl adapted to contact the blade. 24. A machine comprising: an operative structure adapted to perform a task, where the operative structure includes a circular blade having a perimeter and teeth disposed about the perimeter, where the blade is adapted to spin, and where the blade when spinning cuts an object that moves into contact with the teeth;a detection circuit to detect when a person is in contact with the teeth when the blade is spinning, where the detection circuit includes an oscillator that generates an oscillating signal, where the detection circuit also includes an electrical connection between the oscillator and the blade, where the oscillating signal is imparted on the blade through the electrical connection, where the detection circuit further includes a controller that detects a change in the oscillating signal on the blade indicative of the person being in contact with the teeth when the blade is spinning, and where the detection circuit generates a detection signal when the controller detects the change in the oscillating signal on the blade;a firing circuit connected to the detection circuit to receive the detection signal, where the firing circuit outputs electric current upon receiving the detection signal; anda reaction system to stop the blade from cutting the person within 10 milliseconds if the person moves into contact with the teeth at a rate of one foot per second, where the 10 milliseconds is measured from the generation of the detection signal, where the reaction system includes an actuator with a spring or an explosive, where the actuator is connected to the firing circuit to receive the electric current output by the firing circuit, where the electric current received by the actuator from the firing circuit heats a component in the actuator to trigger the spring or explosive to generate a force, and where the reaction system further includes at least one of:i. a brake to stop the blade, where the force from the spring or explosive causes the brake to stop the spinning of the blade within 10 milliseconds after the spring or explosive is triggered, andii. an arbor block supporting the blade, where the force from the spring or explosive causes the arbor block to move and retract the blade at least some amount away from the contact with the person. 25. The machine of claim 24 where the reaction system is adapted to stop the blade from cutting the person within 2 to 10 milliseconds if the person moves into contact with the teeth at a rate of one foot per second, and where the 2 to 10 milliseconds are measured from the generation of the detection signal. 26. The machine of claim 24 where the brake is adapted to stop the spinning of the blade within 2 to 10 milliseconds after the spring or explosive is triggered. 27. The machine of claim 25 where the electrical connection between the oscillator and the blade comprises a capacitive coupling. 28. The machine of claim 25, where the capacitive coupling comprises a plate adjacent the cutting tool. 29. The machine of claim 25, where the firing circuit includes a capacitor.
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