US Patent No: 7,681,479
Number of patents in Portfolio can not be more than 2000
Motion detecting system for use in a safety system for power equipment
Stats
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Mar 23, 2010
Issued date -
Jun 4, 2007
filing date -
11/810,196
serial no -
In Force
status
Importance
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Abstract
A woodworking machine including a detection system adapted to detect a dangerous condition between a person and a working portion of the machine is disclosed. The machine includes a reaction system associated with the detection system to cause a predetermined action to take place relative to the working portion upon detection of the dangerous condition. A motion detection system is adapted to detect motion of the working portion and to disable the reaction system when the working portion is not moving. The motion detection system may include a sensor, such as a Hall effect sensor, an electromagnetic field sensor, an optical sensor, or an electrical sensor. The woodworking machine may take the form of a saw, the working portion may be a blade adapted to cut when spinning, and the dangerous condition may be a person contacting the blade.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
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| 2003/0023,649 Digital filtering method and device and sound image localizing device | 1 | 2002 | |
| 2003/0023,649 Digital filtering method and device and sound image localizing device | 1 | 2002 | |
| 2003/0023,649 Digital filtering method and device and sound image localizing device | 1 | 2002 | |
| 2003/0023,649 Digital filtering method and device and sound image localizing device | 1 | 2002 | |
| 2003/0023,649 Digital filtering method and device and sound image localizing device | 1 | 2002 | |
| 2003/0023,649 Digital filtering method and device and sound image localizing device | 1 | 2002 | |
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| 2005/0186,696 Gas flowmeter and manufacturing method thereof | 2005 | ||
| 2005/0186,696 Gas flowmeter and manufacturing method thereof | 2005 | ||
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| 2009/0132,648 CONTENT DELIVERY AND GLOBAL TRAFFIC MANAGEMENT NETWORK SYSTEM | 4 | 2009 | |
| 2009/0132,648 CONTENT DELIVERY AND GLOBAL TRAFFIC MANAGEMENT NETWORK SYSTEM | 4 | 2009 | |
| 2009/0132,648 CONTENT DELIVERY AND GLOBAL TRAFFIC MANAGEMENT NETWORK SYSTEM | 4 | 2009 | |
| 2009/0132,648 CONTENT DELIVERY AND GLOBAL TRAFFIC MANAGEMENT NETWORK SYSTEM | 4 | 2009 | |
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|||
| 5,331,875 Anti-kick forward device for power driven saws | 69 | 1992 | |
| 6,543,324 Table saw throat plate with blade height scale | 72 | 2001 | |
|
|
|||
| 6,640,683 Apparatus for clamping a workpiece-blocking plate of a table saw | 69 | 2001 | |
| 6,874,397 Circular cutter with a friction-provided plate | 61 | 2003 | |
|
|
|||
| 6,742,430 Circular sawing machine having a hidden-type infrared guide device | 65 | 2002 | |
| 6,607,015 Foldable worktable | 74 | 2002 | |
|
|
|||
| 5,257,570 Circular saw unit | 89 | 1993 | |
| 5,791,224 Circular sawing machine | 75 | 1997 | |
|
|
|||
| 5,119,555 Non-explosive separation device | 115 | 1990 | |
| 5,771,742 Release device for retaining pin | 141 | 1995 | |
|
|
|||
| 5,453,903 Sub-cycle digital distance relay | 67 | 1993 | |
|
|
|||
| 6,647,847 Fence | 74 | 2002 | |
|
|
|||
| 5,411,221 Seat belt retractor with tension relief mechanism | 61 | 1993 | |
|
|
|||
| 4,557,168 Method and apparatus for detecting the cutting resistance in bandsaw machines | 70 | 1983 | |
|
|
|||
| 4,518,043 Tool apparatus with control to move tool when object approached | 97 | 1982 | |
|
|
|||
| 5,480,009 Brake system with two independent mechanical brakes | 67 | 1994 | |
|
|
|||
| 4,875,398 Retractable dust control hood and guard for rotary table saw | 81 | 1988 | |
|
|
|||
| 5,730,165 Time domain capacitive field detector | 385 | 1995 | |
|
|
|||
| 5,377,554 Release device for a mechanical energy storage means | 76 | 1992 | |
|
|
|||
| 4,906,962 Fuse wire switch | 76 | 1989 | |
|
|
|||
| 5,950,514 Miter saw blade guards | 77 | 1997 | |
|
|
|||
| 5,921,367 Safety device for a kneading machine using rolls | 86 | 1997 | |
|
|
|||
| 4,606,251 Adjustable sawdust shear for bandmills | 71 | 1985 | |
|
|
|||
| 6,405,624 Splitter and cutting member guard assembly | 81 | 1998 | |
|
|
|||
| 6,366,099 Differential capacitance sampler | 109 | 1999 | |
|
|
|||
| 6,460,442 Rip fence with dual locking mechanism | 78 | 2002 | |
|
|
|||
| 6,257,061 Capacitive physical-quantity detection apparatus | 101 | 1999 | |
|
|
|||
| 6,644,157 Table saw having adjustable worktable | 78 | 2001 | |
|
|
|||
| 6,148,504 Operator safety device for attaching apparatus | 70 | 1996 | |
|
|
|||
| 4,291,794 Power transmission and energy absorbing systems | 110 | 1979 | |
|
|
|||
| 5,199,343 Power saw with louvered blade guard | 83 | 1991 | |
|
|
|||
| 4,936,876 Method and apparatus for detecting back corona in an electrostatic filter with ordinary or intermittent DC-voltage supply | 77 | 1987 | |
|
|
|||
| 5,272,946 Safety control system for power operated equipment | 90 | 1992 | |
|
|
|||
| 4,589,047 Protective mechanism in electrically operated devices | 93 | 1983 | |
|
|
|||
| 6,492,802 Apparatus and method for detecting defects in a multi-channel scan driver | 71 | 2000 | |
|
|
|||
| 5,320,382 Pulsed pressure source particularly adapted for vehicle occupant air bag restraint systems | 98 | 1991 | |
|
|
|||
| 5,700,165 Fused high ampacity electrical quick disconnect | 76 | 1995 | |
|
|
|||
| 6,601,493 Band saw fence systems and methods | 69 | 2000 | |
|
|
|||
| 6,430,007 Air-activated spindle/disk pack locking system | 71 | 1999 | |
|
|
|||
| 4,625,604 Splitter and blade guard assembly | 90 | 1985 | |
|
|
|||
| 5,572,916 Desk-top cutting machine | 60 | 1994 | |
|
|
|||
| 6,659,233 System and method for aircraft braking system usage monitoring | 86 | 2001 | |
|
|
|||
| 4,675,664 Alarm system and method for detecting proximity of an object to electrical power lines | 55 | 1986 | |
|
|
|||
| 4,510,489 Surveillance system having magnetomechanical marker | 241 | 1982 | |
|
|
|||
| 6,352,137 Brake monitoring system | 75 | 2000 | |
|
|
|||
| 5,436,613 System for detecting human presence in hazardous situations | 82 | 1993 | |
|
|
|||
| 6,471,106 Apparatus and method for restricting the discharge of fasteners from a tool | 83 | 2001 | |
|
|
|||
| 5,648,644 Brake regulating apparatus for an elevator car | 83 | 1994 | |
|
|
|||
| 5,989,116 High-speed bone-in loin slicer | 58 | 1998 | |
|
|
|||
| 4,512,224 Slitter device | 81 | 1983 | |
|
|
|||
| 6,617,720 Integrated paper pulp and process machinery having integrated drive and control and methods of use thereof | 63 | 2000 | |
|
|
|||
| 6,330,848 Circular saw cutting machine | 50 | 2000 | |
|
|
|||
| 4,235,161 Automatic tag attaching apparatus | 104 | 1979 | |
|
|
|||
| 5,791,223 Angled power saw for railroad rails | 72 | 1997 | |
|
|
|||
| 5,695,306 Fusible member connection apparatus and method | 77 | 1996 | |
|
|
|||
| 5,245,879 Fail-safe fire door release mechanism having automatic reset | 94 | 1992 | |
|
|
|||
| 5,937,720 Lower blade guard actuating mechanism for a slide compound miter saw | 79 | 1996 | |
|
|
|||
| 4,975,798 Voltage-clamped integrated circuit | 70 | 1989 | |
|
|
|||
| 5,231,359 Ceramic resonance type electrostatic sensor apparatus | 85 | 1990 | |
|
|
|||
| 6,052,884 Conveyorized system for rebuilding tread and disc brake actuator units for use in railway cars | 66 | 1997 | |
|
|
|||
| 5,659,454 Thermal protection apparatus for a secure electronic appliance, in particular a postage meter | 61 | 1994 | |
|
|
|||
| 2004/0194,594 Machine safety protection system | 100 | 2004 | |
|
|
|||
| 4,195,722 Circuit for a power operated machine | 82 | 1978 | |
|
|
|||
| 4,637,188 Splicing means for faced insulation batts | 72 | 1986 | |
|
|
|||
| 4,937,554 Electronic brake monitoring system and method | 86 | 1989 | |
|
|
|||
| 4,644,832 Method for monitoring saw blade stability and controlling work feed rate on circular saw and bandsaw machines | 74 | 1985 | |
|
|
|||
| 4,560,033 Multifunction wheelchair handbrake especially adapted for ramp climbing | 91 | 1981 | |
|
|
|||
| 4,722,021 Safety circuit for hand tools, and method for safe operation thereof | 84 | 1986 | |
|
|
|||
| 4,262,278 Diagnostic brake system warning circuit | 57 | 1979 | |
|
|
|||
| 4,372,202 Emergency brake for presses | 67 | 1980 | |
|
|
|||
| 5,207,253 Plunge router | 114 | 1992 | |
|
|
|||
| 5,174,349 Power table saw assemblies having integral spare part storage | 86 | 1991 | |
|
|
|||
| 5,081,406 Proximity responsive capacitance sensitive method, system, and associated electrical circuitry for use in controlling mechanical and electro-mechanical equipment | 149 | 1990 | |
|
|
|||
| 4,672,500 Protective device for electrostatic sprayer equipment | 66 | 1984 | |
|
|
|||
| 6,431,425 Pneumatic fastener driving tool and an electronic control system therefore | 94 | 2000 | |
|
|
|||
| 4,679,719 Electronic control for a pneumatic fastener driving tool | 80 | 1985 | |
|
|
|||
| 5,534,836 Deactivator for theft-deterrent markers | 77 | 1994 | |
|
|
|||
| 5,321,230 Seal wire heat control system | 80 | 1993 | |
|
|
|||
| 4,615,247 Anti-kickback system | 71 | 1985 | |
|
|
|||
| 4,751,603 Safety devices | 94 | 1987 | |
|
|
|||
| 4,589,860 Gear and method for making the same | 78 | 1984 | |
|
|
|||
| 4,845,476 Proximity detector between a metallic mass and an element to which is applied an electric voltage | 52 | 1987 | |
|
|
|||
| 4,599,597 Circuit protection devices | 68 | 1984 | |
|
|
|||
| 6,170,370 Circular saw splitter device with integral anti-kick back | 79 | 1999 | |
|
|
|||
| 6,404,098 Drive unit using shape memory alloy | 127 | 2000 | |
|
|
|||
| 6,133,818 Redundant fuse wire release device | 71 | 1999 | |
|
|
|||
| 4,321,841 Press safety device | 74 | 1980 | |
|
|
|||
| 6,376,939 Sensor apparatus and safety apparatus for protecting approach to machines | 101 | 2000 | |
|
|
|||
| 2004/0159,198 Table saw with cutting tool retraction system | 94 | 2003 | |
|
|
|||
| 5,741,048 Controller for electric braking system | 68 | 1994 | |
|
|
|||
| 5,046,426 Sequential structural separation system | 86 | 1989 | |
|
|
|||
| 5,082,316 Release mechanism and method with alarm circuit | 70 | 1990 | |
|
|
|||
| 4,756,220 Safety mechanism for saws | 68 | 1987 | |
|
|
|||
| 4,199,930 Alarm switch for an alarm circuit in a horological device | 62 | 1978 | |
|
|
|||
| 5,568,131 Motor rotation judgement circuit and apparatus using such circuit for verifying that a motor is stopped | 8 | 1994 | |
|
|
|||
| 4,190,000 Mine proximity fuse | 79 | 1962 | |
|
|
|||
| 5,239,978 Oscillatory abrasive cable power saw | 59 | 1992 | |
|
|
|||
| 6,420,814 Spiral wound transducer | 74 | 1999 | |
|
|
|||
| 4,466,233 Mower drive assembly | 83 | 1982 | |
|
|
|||
| 5,592,353 Power supply system | 72 | 1994 | |
|
|
|||
| 5,025,175 Safety means for powered machinery | 83 | 1989 | |
|
|
|||
| 5,974,927 Circular saw cutting machine | 65 | 1997 | |
|
|
|||
| 5,074,047 Anti-pinch device for chain saw | 59 | 1990 | |
|
|
|||
| 5,963,173 Antenna and transmitter arrangement for EAS system | 87 | 1997 | |
|
|
|||
| 5,671,633 Plate array for moisture sensor with reduced sensitivity to loading effects | 68 | 1996 | |
|
|
|||
| 4,637,289 Work presence controller | 76 | 1984 | |
|
|
|||
| 4,326,313 Method of making footwear | 68 | 1979 | |
| 4,305,442 Saw including resiliently mounted flexible guard means | 69 | 1980 | |
| 4,391,358 Hardware press and punch apparatus | 87 | 1980 | |
| 4,576,073 Saw blade guard | 59 | 1983 | |
| 4,532,844 Device for supporting a circular saw of sawing machine | 71 | 1984 | |
| 4,621,300 Safety monitoring system for punch press operators | 75 | 1984 | |
| 4,566,512 Router attachment | 78 | 1985 | |
| 4,657,428 Quick change mechanism for circular saw blades and other spinning disc devices | 107 | 1985 | |
| 4,792,965 Oscillator system for detecting a selected one of a plurality of tuned circuits | 83 | 1987 | |
| 5,052,255 Speed brake | 77 | 1989 | |
| 5,265,510 Material working and tool control system | 71 | 1992 | |
| 5,231,906 Table saw guard | 66 | 1992 | |
| 5,401,928 Safety control for power tool | 69 | 1993 | |
| 5,377,571 Safety guard system for band saws and similar equipment | 69 | 1993 | |
| 6,418,829 Power tool safety device | 98 | 1994 | |
| 5,510,685 Electric motor control based on conductive contact of machine component with operator for injury prevention | 72 | 1994 | |
| 5,503,059 Vehicle disabling device and method | 80 | 1995 | |
| 5,587,618 Direct current homopolar machine | 75 | 1995 | |
| 5,667,152 Safety system for a wood chipper | 100 | 1995 | |
| 5,782,001 Circular saw guard hold and release device | 91 | 1996 | |
| 5,791,441 Brake failure monitoring system | 70 | 1996 | |
| 5,942,975 Method and a device for sensing the distance between a first object and a second object | 134 | 1998 | |
| 5,992,276 Safety guard for lathes | 5 | 1998 | |
| 6,095,092 Apparatus and method for confining an animal within a boundary | 83 | 1999 | |
| 6,796,208 Sawdust collection hood for table saw | 59 | 1999 | |
| 6,536,536 Power tools | 178 | 2000 | |
| 6,578,460 Blade guard assembly | 73 | 2000 | |
| 6,578,856 Collapsible portable saw stand | 92 | 2000 | |
| 6,546,835 Saw blade adjusting device for table saw | 82 | 2001 | |
| 2003/0037,655 Catch structure of rotary cover plate of circular sawing machine | 59 | 2001 | |
| 6,619,348 Adjustable and extendible platform for working table | 77 | 2002 | |
| 6,874,399 Cutting machine with built-in miter cutting feature | 63 | 2002 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Sep 23, 2013 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 23, 2017 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 23, 2021 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |