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US 9,927,796 B2Granted
Band saw with improved safety system
AssigneeSawStop Holding LLC
InventorStephen F. Gass
Life of this patent
Estimating the term…
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.
Claims8
A band saw comprising:
- 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;
- an electronic circuit adapted to detect contact between a person and the blade, where the electronic circuit uses capacitance to detect the contact, and where the electronic circuit generates a signal upon detection of the contact;
- and
- a reaction system connected to the electronic circuit to receive the signal, where the reaction system is triggerable by the signal to engage and stop the blade within 10 milliseconds after being triggered, and where the reaction system includes a component moveable from a first position away from the blade to a second position in contact with the blade.
3 more elements
Dependencies are inferred from the claim text.