Table Saws

• US 10,335,972 B2
• Filed: 03/26/2018
• Issued: 07/02/2019
• 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): Alie, Ghassem
• Application Number:
  US15/935,395
• Publication Number:
  US 20180215064A1
• Time in Patent Office: 463 Days
• Field of Search: 83581, 83 621, 83781, 83DIG 1, 834772, 834771, 83473, 834711, 834683, 83485, 83489, 8369811, 83491, 83609, 835082, 831021, 834713, 834712, 83860, 83 58
• 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 table;

a housing supporting the table;

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 first switch that is switchable between an “

on”

position and an “

off”

position to start and stop the motor; and

a second switch to bypass the safety system, where the second switch is moveable from a first position to a second position, and where the second switch does not stay in the second position unless held in that position by a user;

where switching the first switch to the “

on”

position while the user is holding the second switch in the second position bypasses the safety system and starts the motor, but switching the first switch to the “

on”

position after the user moved the second switch to the second position and then released the second switch does not bypass the safety system.