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US 7,308,843 B2Granted
Spring-biased brake mechanism for power equipment
AssigneeSd3, LLC
InventorsStephen F. Gass, David S. D'Ascenzo
Life of this patent
Estimating the term…
Abstract
Woodworking machines are disclosed having cutting tools for cutting workpieces. The machines include a detection system adapted to detect one or more dangerous conditions between a person and the cutting tool. The machines also include at least one brake component adapted to engage and stop movement of the cutting tool, and an actuator adapted to move the brake component into contact with the cutting tool at a high acceleration when the detection system detects the dangerous condition between the person and the blade.
Claims21
A woodworking machine comprising:
- a support frame;
- a motor supported by the frame;
- a cutting tool supported by the frame and moveable by the motor;
- a detection system adapted to detect a dangerous condition between a person and the cutting tool;
- a brake component adapted to engage the cutting tool, where the brake component has a ready position spaced apart from the cutting tool;
- and
- an actuator having stored energy sufficient to move the brake component from the ready position into engagement with the cutting tool within approximately 3 milliseconds or less after the dangerous condition is detected.
4 more elements
A woodworking machine, comprising:
- a cutting tool adapted to cut workpieces;
- means for driving the cutting tool;
- means for detecting a dangerous condition between a person and the cutting tool;
- a brake component spaced apart from the cutting tool;
- and
- means for moving the brake component into contact with the cutting tool within 3 milliseconds or less after the dangerous condition is detected.
3 more elements
A woodworking machine comprising:
- a support frame;
- a motor supported by the frame;
- a cutting tool supported by the frame and moveable by the motor;
- a detection system adapted to detect a dangerous condition between a person and the cutting tool;
- a mechanism having a moveable component adapted to move upon detection of the dangerous condition by the detection system, where movement of the moveable component contributes to the mitigation or prevention of injury to the person, and
- an actuator having stored energy sufficient to start moving the moveable component within 3 milliseconds after the dangerous condition is detected.
3 more elements
Dependencies are inferred from the claim text.