Apparatus and method for detecting dangerous conditions in power equipment
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B26D-005/00
B23D-045/00
출원번호
US-0929221
(2001-08-13)
등록번호
US-7284467
(2007-10-23)
발명자
/ 주소
Gass,Stephen F.
Fulmer,J. David
Jensen,Joel F.
출원인 / 주소
SD3, LLC
인용정보
피인용 횟수 :
54인용 특허 :
303
초록▼
Woodworking machines are disclosed having electrically conductive cutting tools adapted to cut workpieces. The machines include a contact detection system capacitively coupled to the cutting tool, and adapted to detect contact between a person and the cutting tool. The machines also include a reacti
Woodworking machines are disclosed having electrically conductive cutting tools adapted to cut workpieces. The machines include a contact detection system capacitively coupled to the cutting tool, and adapted to detect contact between a person and the cutting tool. The machines also include a reaction system configured to cause one or more predetermined actions to take place upon detection of contact between a person and the cutting tool by the contact detection system.
대표청구항▼
The invention claimed is: 1. A woodworking machine, comprising: a motor; an electrically isolated, rotatable arbor configured to be driven by the motor, where the arbor has an outer surface; a circular blade coupled to the arbor; an excitation system adapted to generate an electrical signal; and a
The invention claimed is: 1. A woodworking machine, comprising: a motor; an electrically isolated, rotatable arbor configured to be driven by the motor, where the arbor has an outer surface; a circular blade coupled to the arbor; an excitation system adapted to generate an electrical signal; and a capacitive coupling adapted to capacitively couple the excitation system to the arbor to transfer at least a portion of the electrical signal to the blade, where the capacitive coupling includes two spaced-apart conductors, and where at least a portion of the outer surface of the arbor is one of the conductors. 2. A woodworking machine comprising: an electrically conductive cutting tool mounted on a rotatable, electrically conductive shaft; a contact detection system configured to detect contact between a person and the cutting tool, where the contact detection system includes a capacitive coupling adapted to impart an electrical signal onto the cutting tool; and a reaction system configured to cause one or more predetermined actions to take place upon detection of contact between a person and the cutting tool by the contact detection system; where the capacitive coupling comprises at least a portion of the shaft as one conductive plate, and a second conductive plate adjacent to and spaced apart from the shaft so that there is a gap between the shaft and the second conductive plate, and a dielectric in the gap between the shaft and second conductive plate. 3. The machine of claim 2, further comprising a frame configured to support the shaft, and where the shaft is electrically insulated from the frame. 4. The machine of claim 3, where the shaft is mounted in one or more beanngs supported by the frame, and where the shaft is electrically insulated from the bearings by one or more electrically insulating components disposed between the shaft and the bearings. 5. The machine of claim 3, where the shaft is mounted in one or more bearings supported by the frame, and where the shaft is electrically insulated from the frame by one or more electrically insulating components disposed between the bearings and the frame. 6. The machine of claim 2, where the contact detection system includes one or more sense electrodes configured to monitor the electrical signal on the cutting tool. 7. The machine of claim 6, where the one or more sense electrodes are disposed adjacent the shaft to monitor the electrical signal on the cutting tool through the shaft. 8. The machine of claim 2, further comprising a motor assembly configured to rotate the shaft and cutting tool, and where the one or more predetermined actions include stopping the rotation of the cutting tool. 9. A woodworking machine comprising: a frame; a conductive cutting tool supported by and electrically insulated from the frame; a motor supported by the frame and adapted to drive the cutting tool; a contact detection system adapted to detect contact between a person and the cutting tool, wherein the contact detection system includes a first electrode capacitively coupled to the cutting tool to impart a signal to the cutting tool and a second electrode capacitively coupled to the cutting tool to monitor the signal imparted to the cutting tool; and a reaction system adapted to stop movement of the cutting tool upon detection of contact between a person and the cutting tool by the contact detection system. 10. The machine of claim 9, where the contact detection system includes excitation circuitry coupled to the first electrode, and where the excitation circuitry is adapted to generate a drive signal and output the drive signal onto the first electrode. 11. The machine of claim 10, where the contact detection system includes sensing circuitry coupled to the second electrode, where the sensing circuitry is adapted to sense the signal coupled to the second electrode from the cutting tool. 12. The machine of claim 9, further comprising a shaft electrically insulated from the frame, where the cutting tool is mounted on the shaft, and where at least one of the first or second electrodes is coupled to the cutting tool through the shaft. 13. A woodworking machine, comprising: an electrically conductive cutting tool; a motor configured to drive the cutting tool; a contact detection system configured to detect contact between a person and the cutting tool; a capacitive coupling between the contact detection system and the cutting tool, where the capacitive coupling comprises at least a portion of the cutting tool as one conductive plate, and a second conductive plate adjacent to and spaced apart from the cutting tool so that there is a gap between the cutting tool and the second conductive plate; and a brake mechanism configured to engage and stop the cutting tool if contact between the person and the cutting tool is detected by the contact detection system; where the contact detection system is configured to impart an electrical signal onto the cutting tool through the capacitive coupling, and to detect contact between a person and the cutting tool based on changes in the electrical signal imparted to the cutting tool. 14. The machine of claim 2, where the portion of the shaft comprising part of the capacitive coupling is nominally circular in cross-section, and where the conductive plate is substantially concentric with that portion of the shaft. 15. The machine of claim 14, where the conductive plate substantially encircles the portion of the shaft comprising part of the capacitive coupling. 16. The machine of claim 13, where the cutting tool comprises a band blade. 17. The machine of claim 13, where the cutting tool comprises a circular blade. 18. The machine of claim 13, where the cutting tool comprises a circular blade mounted on an arbor. 19. The machine of claim 13, where the cutting tool comprises an arbor with a circular blade and pulley mounted thereon.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (303)
Lichtblau George Jay (425 E. 63rd St. Suite E - 12-D New York NY 10021), A multi-frequency resonant tag circuit for use with an electronic security system having improved noise discrimination.
Schoene Keith R. (St. Charles MO) Terpstra Daniel A. (Kirkwood MO) Brundage Richard B. (Ladue MO) Tomiser ; Jr. Frank J. (St. Louis MO), Adjustable/bypassable bevel stop for compound miter saw.
Cloutier Marius (Boucherville CAX) Bourgeois Jean-Marc (Longueuil CAX) Lalonde Francois (Varennes CAX), Alarm system and method for detecting proximity of an object to electrical power lines.
Warren A. Ceroll ; Robert S. Gehret ; Daniel Puzio ; Frederick R. Bean ; Michael L. O'Banion ; David A. Porter ; Daniel A. Ferrara, Jr., Base portions of a table saw.
Ceroll Warren A. ; Bean Frederick R. ; Kenyon Maria I. ; Parks James R. ; Gehret Robert S. ; Porter David A. ; O'Banion Michael L. ; Puzio Daniel ; Brewer Kevin, Blade and motor carrier with height/angle adjustment mechanism.
Ceroll Warren A. ; Bean Frederick R. ; Kenyon Maria I. ; Parks James R. ; Gehret Robert S. ; Porter David A. ; O'Banion Michael L. ; Puzio Daniel ; Brewer Kevin, Blade and motor carrier with height/angle adjustment mechanism.
Ceroll, Warren A.; Bean, Frederick R.; Kenyon, Maria I.; Parks, James R.; Gehret, Robert S.; Porter, David A.; O'Banion, Michael L.; Puzio, Daniel; Brewer, Kevin D., Blade and motor carrier with height/angle adjustment mechanism.
Warren A. Ceroll ; Frederick R. Bean ; Maria I. Kenyon ; James R. Parks ; Robert S. Gehret ; David A. Porter ; Michael L. O'Banion ; Daniel Puzio ; Kevin Brewer, Blade and motor carrier with height/angle adjustment mechanism.
Woloveke Eugene L. (864 Dolphin Dr. Danville CA 94526) Thompson Marvin M. (2137 Otis Dr. #208 Alameda CA 94501), Brake apparatus for a motor driven saw blade.
McCullough Timothy J. (833 Aurora Rd. Vermilion OH 44089) Grasselli Giorgio (Via L. Roversi No 2 42020 Albinea ITX), Control and safety system for electrically operated devices.
Steckler Adam ; Pope Charlie ; Macklin Norris ; Hannaford John J. ; Ginther Karl, Conveyorized system for rebuilding tread and disc brake actuator units for use in railway cars.
Grasselli Giorgio (Via Roversi ; 2-42020 Albinea (Reggio E.) ITX), Electric motor control based on conductive contact of machine component with operator for injury prevention.
Brandenstein Manfred (Eussenheim DEX) Haas Roland (Hofheim DEX) Herrmann Gerhard (Schweinfurt DEX) Dobhan Herbert (Bergrheinfeld DEX) Hans Rdiger (Niederwerrn DEX), Gear and method for making the same.
Egan, III, John J.; Demler, Christopher L., Integrated paper pulp and process machinery having integrated drive and control and methods of use thereof.
Reyes Victor (Copenhagen DKX), Method and apparatus for detecting back corona in an electrostatic filter with ordinary or intermittent DC-voltage suppl.
Smith H. Reid (P.O. Box 2200 Poulsbo WA 98370), Method for monitoring saw blade stability and controlling work feed rate on circular saw and bandsaw machines.
Bosten Donald R. (Jackson TN) Kriaski John R. (Jackson TN) Schnell John W. (Jackson TN) Nichols ; Jr. James P. (Jackson TN) Plume Steven H. (St. Charles MO) Popik Matthew G. (Jackson TN) Huntsman Den, Miter saw alignment system.
Ceroll, Warren A.; Gehret, Robert S.; Puzio, Daniel; Bean, Frederick R.; O'Banion, Michael L.; Porter, David A.; Ferrara, Jr., Daniel A., Portions of a table saw.
Svetlik Kenneth N. (Schaumburg IL) Schultz William H. (Northbrook IL) Feldman Daniel B. (Highland Park IL), Power table saw assemblies having integral spare part storage.
Rangeard Gilbert (Ardelay FRX) Garnier Jean C. (FougerFRX) Thomas Jean (Chantonnay FRX), Proximity detector between a metallic mass and an element to which is applied an electric voltage.
Hughes Rickey D. (Providence UT) Reese James T. (Logan UT), Proximity responsive capacitance sensitive method, system, and associated electrical circuitry for use in controlling me.
Reulein Hermann (Pinneberg-Thesdorf DEX) Liensdorf Alfred (Noderstedt DEX) Lacher Bernd (Agathorst DEX) Eckmann Peter (Hamburg DEX) Kock Hans-Otto (Kaltenkirch DEX), Release device for a mechanical energy storage means.
Bielinski Slawomir J. (Camarillo CA) McCormick Larry L. (Camarillo CA) Stephenson Roger C. (Woodland Hills CA), Reusable initiator for use in triggering high-load actuators.
Hornung Friedrich (Stuttgart DEX) Schdlich Fritz (Leinfelden DEX) Gerschner Martin (Leinfelden-Echterdingen DEX) Gnther Klaus (Stuttgart DEX), Safety circuit for hand tools, and method for safe operation thereof.
McCullough Timothy J. (833 Aurora Rd. Vermillion OH 44089) Grasselli Giorgio (Via L. Roversi No. 2 42020 Albinea Re ITX), Safety control for power operated equipment.
McIntyre ; Robert Alfred ; Wolverton ; Kenneth Harlan, Safety double protection device for machines having plural circuit breaker assemblies associated with doffer roller and.
Anderson ; III Philip M. (Chatham NJ) Bretts Gerald R. (Livingston NJ) Kearney James E. (New Hyde Park NY), Surveillance system having magnetomechanical marker.
Ghosh Kalyan (Montral CAX) Bose Tapan K. (Trois-Rivi e,acu e×res CAX) Courteau Raymond (St-Maurice CAX) Gibello Pierre (Laval CAX), System for detecting human presence in hazardous situations.
Puzio Daniel ; O'Banion Michael L. ; Gehret Robert S. ; Ceroll Warren A. ; Welsh Robert P. ; Livingston Scott M. ; Shadeck Louis M. ; Bean Frederick R., Table saw.
Anderson Jack F. (Marion ND 58466) Melrose Clayton (Oakes ND) Melrose Floyd (Brookings SD), Tool apparatus with control to move tool when object approached.
Eccardt Curtis J. (County of St. Charles MO) Smith Arnold L. (County of St. Louis MO), Tool elevation and bevel adjustment for direct drive power tool.
Behne, Rockne Wade; Chipner, Todd; Garcia, Jaime; Smith, John Charles; Stafford, Brent Edward; Zhang, Zhilong, Work piece guiding system for a table saw.
Kajita, Eishi; Avetisian, Vahan; Tirmizi, Abrar, Pyrotechnic actuator and power cutting tool with safety reaction system having such pyrotechnic actuator.
Knapp, William R.; Krauer, Jean Pierre; Anderson, Wilfred H.; Petrich, Kyle L.; Hayashida, Jeffrey Y.; Yoo, Helen J., Pyrotechnic drop mechanism for power tools.
Knapp, William R.; Krauer, Jean-Pierre; Anderson, Wilfred H.; Petrich, Kyle L.; Hayashida, Jeffrey Y.; Yoo, Helen J., Pyrotechnic drop mechanism for power tools.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.