Elevation mechanism for table saws

• US 7,827,893 B2
• Filed: 03/14/2007
• Issued: 11/09/2010
• Est. Priority Date: 12/31/2003
• Status: Active Grant

• Current Assignee: Sawstop Holding LLC
• Original Assignee: SD3, LLC
• Inventors: Fanning, David A., Gass, Stephen F., Fulmer, J. David
• Primary Examiner(s): Alie; Ghassem
• Application Number:
  US11/724,077
• Publication Number:
  US 20070151433A1
• Time in Patent Office: 1,336 Days
• Field of Search: 834/772, 831/028.2, 831/021, 834/78, 838/20, 838/23, 834/402, 835/44, 837/81, 83D/IG.1, 835/81, 83/621, 834/771, 834/73, 834/711, 834/85, 834/89, 836/981.1, 834/91, 836/06, 835/082, 83/58, 834/713, 838/60, 144/307, 144/308, 144/251.1, 144/251.2, 144/251.3, 144/278.1, 144/3.1, 144/130, 144/286.5, 144/287, 451/454, 451/455, 409/134
• US Class Current: 83/477.2
• CPC Class Codes: B23D 45/067 the saw blade being adjustable according to depth or angle of cut
• 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: B23D 59/006 for removing or collecting chips
• 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 19/02 for circular saws
• CPC Class Codes: B27G 19/06 for band or strap saws
• CPC Class Codes: B27G 19/08 Accessories for keeping open the saw kerf, e.g. riving knives or wedge plates
• CPC Class Codes: Y10S 83/01 Safety devices
• 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 83/141 With means to monitor and control operation [e.g., self-regulating means]
• CPC Class Codes: Y10T 83/704 With work-support and means to vary relationship between tool and work support
• CPC Class Codes: Y10T 83/7688 Plural tool elements successively actuated at same station
• 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 83/7705 Adjustable angular relationship
• CPC Class Codes: Y10T 83/7726 By movement of the tool
• CPC Class Codes: Y10T 83/773 : Work-support includes passageway for tool [e.g., slotted table]
• CPC Class Codes: Y10T 83/7793 : Means to rotate or oscillate tool
• CPC Class Codes: Y10T 83/8773 : Bevel or miter cut

Abstract

Table saws with elevation mechanisms are disclosed. One embodiment includes a table saw with a blade, an elevation carriage, a trunnion structure, and a shaft positioned beyond the perimeter of the blade. Another embodiment includes a second shaft interconnecting the elevation carriage and trunnion structure, where the second shaft is positioned beyond the perimeter of the blade.

Claims

1. A table saw comprising:

a table defining a work surface;

a generally planar, circular blade configured to extend at least partially above the work surface;

a motor to drive the blade;

an elevation carriage adapted to support the blade and to move to change the elevation of the blade relative to the work surface;

a trunnion structure adapted to support the elevation carriage and to move the blade between a position where the blade is perpendicular to the work surface and a position where the blade is not perpendicular to the work surface, where at least a first portion of the trunnion structure extends generally perpendicularly to the plane of the blade and to the work surface;

a projection extending out from the first portion of the trunnion structure; and

an elongate support shaft fixed to the projection and held against rotation and interconnecting the elevation carriage and the trunnion structure so that the elevation carriage slides along the length of the support shaft as the elevation carriage moves to change the elevation of the blade relative to the work surface.

2. The table saw of claim 1, further comprising a second projection extending out from the trunnion structure, where the support shaft is also fixed to the second projection.

3. The table saw of claim 1, further comprising a threaded shaft configured to move the elevation carriage relative to the work surface.

4. The table saw of claim 3, where the table has a front and the blade has a center, and where the support shaft and the threaded shaft are both positioned between the front of the table and the center of the blade.

5. The table saw of claim 1, further comprising a flange extending out from the elevation carriage, and a bore in the flange through which the support shaft extends.

6. The table saw of claim 1, further comprising a flange extending out from the elevation carriage, a first bore in the flange, where the support shaft extends through the first bore, a threaded shaft configured to move the elevation carriage relative to the work surface, and a second bore in the flange, where the second bore is configured to support the threaded shaft.

7. The table saw of claim 6, where the table has a front and the blade has a center, and where the support shaft and the threaded shaft are both positioned between the front of the table and the center of the blade.

8. The table saw of claim 1, further comprising a threaded shaft configured to move the elevation carriage relative to the work surface, where the support shaft and threaded shaft extend generally vertically relative to the work surface when the blade is perpendicular to the work surface, and where the support shaft extends below the threaded shaft relative to the work surface.

9. The table saw of claim 8, where the table has a front and the blade has a center, and where the support shaft and the threaded shaft are both positioned between the front of the table and the center of the blade.

10. The table saw of claim 1, where the support shaft is cylindrical and the projection includes a notch configured to receive the support shaft.

11. The table saw of claim 10, where the notch is in an outer edge of the projection.

12. The table saw of claim 10, where the support shaft is bolted to the notch.

13. The table saw of claim 1, where the support shaft is fixed to the projection by a bolt.