Table saws

• US 9,925,683 B2
• Filed: 09/23/2015
• Issued: 03/27/2018
• Est. Priority Date: 10/01/1999
• Status: Expired due to Fees

• Current Assignee: Sawstop Holding LLC
• Original Assignee: Sawstop Holding LLC
• Inventors: Gass, Stephen F., Fulmer, J. David, Fanning, David A.
• Primary Examiner(s): PRONE, JASON D
• Application Number:
  US14/862,571
• Publication Number:
  US 20160008997A1
• Time in Patent Office: 916 Days
• Field of Search: 83DIG 1, 83 58, 83 62, 83 621, 83 63, 83 72, 83 767, 83788, 83581, 834712, 834771, 834772, 8352212, 83526, 833971, 1441545, 144356, 144384, 144391, 144427, 1442865, 29708, 29254, 29413, 324550, 324424, 408 5, 56 109, 56 113, 192192 A, 192129 R, 192130, 1022027, 89 156, 137 6812, 137 72, 137 76, 188 5, 188 6, 188110, 188189, 169 57, 169 59, 169 42, 169DIG 3, 74 2, 403 2, 403 28, 411 2, 411 39, 411390, 335 1, 335242, 335132, 318362, 241 325, 337239, 337148, 337 1, 337 5, 337 10, 337 17, 337140, 337170, 337190, 337237, 337401, 337290, 337404, 337405, 218 2, 218154, 307639, 307328, 307115, 307326, 307142, 307117, 307126, 307131, 451409, 280806, 297480, 187 69, 187 77, 187 89, 187189, 187216, 187166, 187 723, 340679, 340680, 3406861, 340687, 3406863, 3406866, 200 5037
• CPC Class Codes: B23D 47/025 of tables
• 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: B26D 7/24 arranged to disable the operating means for the cutting member
• 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 vibration-damping of sawing machines or devices working with circular saw blades B23D47/005
• 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: B27G 19/06 for band or strap 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 3/14 the means being photocells or other devices sensitive without mechanical contact
• CPC Class Codes: F16P 3/148 using capacitive technology
• CPC Class Codes: G05B 9/02 electric
• CPC Class Codes: Y10S 83/01 Safety devices
• CPC Class Codes: Y10T 83/04 Processes
• CPC Class Codes: Y10T 83/081 With randomly actuated stopping means
• CPC Class Codes: Y10T 83/088 Responsive to tool detector or work-feed-means detector
• CPC Class Codes: Y10T 83/089 Responsive to tool characteristic
• CPC Class Codes: Y10T 83/091 Responsive to work sensing means
• CPC Class Codes: Y10T 83/141 With means to monitor and control operation [e.g., self-regulating means]
• CPC Class Codes: Y10T 83/162 : With control means responsive to replaceable or selectable information program
• CPC Class Codes: Y10T 83/175 : With condition sensor
• CPC Class Codes: Y10T 83/178 : Responsive to work
• CPC Class Codes: Y10T 83/541 : Actuation of tool controlled in response to work-sensing means
• 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 83/85 : Signal; e.g., alarm
• CPC Class Codes: Y10T 83/8773 : Bevel or miter cut

Abstract

Table saws with safety systems are disclosed. The safety systems detect and react to dangerous conditions, such as contact between the blade and a person. The table saws may include a switch, a first light that illuminates to indicate the safety system is operable, and a second light that illuminates to indicate that the safety system is inoperable. The switch may not power the saw when switched on if the second light is illuminated.

Claims

1. A table saw comprising:

a circular blade;

a motor that spins the blade;

electronics that detect contact between the blade and a person;

a safety system that stops or retracts the blade when contact between the blade and a person is detected;

a switch that is switchable between an “

on”

position and an “

off”

position to start and stop the motor;

a first light that illuminates to indicate the safety system is operable; and

a second light that illuminates to indicate that the safety system is inoperable;

where the motor will not begin spinning the blade when the switch is switched from the “

off”

position to the “

on”

position if the second light is illuminated and the safety system is not then stopping or retracting the blade.