Miter saw with safety system

• US 20100263509A1
• Filed: 04/19/2010
• Published: 10/21/2010
• Est. Priority Date: 08/14/2000
• Status: Active Grant

• Current Assignee: Sawstop Holding LLC
• Original Assignee: SD3, LLC
• Inventors: Gass, Stephen F.
• Granted Patent: US 8,100,039 B2
• Time in Patent Office: Days
• US Class Current: 83/58
• CPC Class Codes: B23D 47/08 of devices for bringing the circular saw blade to the workpiece or removing same therefrom
• CPC Class Codes: B23D 59/001 Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade measuring in general G01; controlling in general G05
• CPC Class Codes: B27B 13/14 Braking devices specially designed for band sawing machines, e.g. acting after damage of the band saw blade
• CPC Class Codes: B27B 5/38 Devices for braking the circular saw blade or the saw spindle; Devices for damping vibrations of the circular saw blade, e.g. silencing B23D47/005 takes precedence
• CPC Class Codes: B27G 19/00 Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: F16P 3/12 with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine F16P3/08 takes precedence
• CPC Class Codes: F16P 3/148 using capacitive technology
• CPC Class Codes: Y10T 83/081 With randomly actuated stopping means
• CPC Class Codes: Y10T 83/089 Responsive to tool characteristic
• CPC Class Codes: Y10T 83/613 Work guard
• CPC Class Codes: Y10T 83/7693 Tool moved relative to work-support during cutting
• CPC Class Codes: Y10T 83/7697 Tool angularly adjustable relative to work-support
• CPC Class Codes: Y10T 83/7726 By movement of the tool
• CPC Class Codes: Y10T 83/7734 With guard for tool
• CPC Class Codes: Y10T 83/7788 Tool carrier oscillated or rotated
• CPC Class Codes: Y10T 83/8773 Bevel or miter cut

Abstract

A miter saw is disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place upon detection of the dangerous condition. The blade is rotatable, and moves into a cutting zone to cut a workpiece. The predetermined action may be to retract the blade from the cutting zone.

Claims

1. A miter saw comprising:

a support structure having a cutting zone;

a swing arm above and pivotally attached to the support structure;

a rotatable blade supported by the swing arm;

a handle associated with the swing arm and adapted so that a user may grasp the handle to move the blade into the cutting zone;

a motor adapted to drive the blade;

a detection system adapted to detect a dangerous condition between the blade and a person; and

a retraction mechanism adapted to pivot the blade away from the cutting zone upon detection by the detection system of the dangerous condition between the blade and the person.

2. The miter saw of claim 2 where the dangerous condition is contact.

3. A miter saw comprising:

a support structure having a cutting zone;

a swing arm above and movably attached to the support structure;

a rotatable blade supported by the swing arm;

a handle associated with the swing arm and adapted so that a user may grasp the handle to move the blade into the cutting zone;

a motor adapted to drive the blade;

a detection system adapted to detect a dangerous condition between the blade and a person; and

retraction means for retracting the blade away from the cutting zone upon detection by the detection system of the dangerous condition between the blade and the person.