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US 2018/0210419 A1Published application
Band saw with improved safety system
AssigneeSawStop Holding LLC
InventorStephen F. Gass
Life of this patent
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Abstract
A band saw including a frame, at least two, spaced apart, rotatable wheels supported by the frame, a blade looped around the wheels, where rotation of at least one wheel causes the blade to move around the wheels, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system configured to engage and stop the blade within 10 milliseconds after detection of the dangerous condition is disclosed. The reaction system may be configured to cut and grip the blade.
Claims5
A band saw comprising:
- a motor;
- at least two spaced-apart wheels, where at least one wheel is driven by the motor;
- a band blade extending around the wheels, where the band blade is electrically isolated;
- signal generation circuitry adapted to generate an electrical signal;
- a capacitive coupling adapted to capacitively couple the signal generation circuitry to the band blade to transfer at least a portion of the electrical signal to the band blade;
- and
- detection circuitry that monitors the electrical signal on the band blade for changes indicative of a dangerous condition between a person and the band blade, where the detection circuitry triggers some action to mitigate the dangerous condition when the changes indicative of the dangerous condition are detected.
4 more elements
A band saw comprising:
- a motor;
- a band blade driven by the motor, where the band blade is electrically isolated;
- signal generation circuitry adapted to generate an electrical signal;
- coupling means for capacitively coupling the signal generation circuitry to the cutting tool to transfer at least a portion of the electrical signal to the cutting tool;
- and
- detection means for monitoring the electrical signal on the cutting tool for changes indicative of a dangerous condition between a person and the cutting tool, and for triggering some action to mitigate the dangerous condition when the changes indicative of the dangerous condition are detected.
3 more elements
Dependencies are inferred from the claim text.