Table saw blade guards and blade guard assemblies including lateral blade guards, and table saws including the same

• US 8,079,295 B2
• Filed: 06/20/2008
• Issued: 12/20/2011
• Est. Priority Date: 06/20/2008
• Status: Active Grant

• Current Assignee: Sawstop Holding LLC
• Original Assignee: SD3, LLC
• Inventors: Gass, Stephen F.
• Primary Examiner(s): Alie, Ghassem
• Application Number:
  US12/214,562
• Publication Number:
  US 20090314148A1
• Time in Patent Office: 1,278 Days
• Field of Search: 834/772, 834/90, 835/81, 834/78, 831/021, 834/402, 834/712
• US Class Current: 83/478
• CPC Class Codes: B27B 5/243 the saw blade being arranged underneath the work-table the circular saw blade arranged underneath a stationary work-table for sawing material in general B23D45/06
• CPC Class Codes: B27G 19/02 for circular saws
• CPC Class Codes: Y10T 83/7693 Tool moved relative to work-support during cutting
• CPC Class Codes: Y10T 83/773 Work-support includes passageway for tool [e.g., slotted table]
• CPC Class Codes: Y10T 83/7734 With guard for tool

Abstract

Table saw blade guards with lateral guards, blade guard assemblies, and table saws including the same. The blade guards include at least one lateral guard that restricts access to a lateral side, or face, of the saw'"'"'s blade, and may include a top guard. The lateral guard is selectively moved, such as responsive to engagement by a workpiece, between a non-cutting position and a plurality of cutting positions. In some embodiments, the lateral guard is a collapsing lateral guard that has a reduced perimetrical area and/or reduced vertical dimension relative to the saw'"'"'s work surface when in a cutting position compared to the non-cutting position. In some embodiments, the lateral guard collapses toward the top guard when moved from its non-cutting position to a cutting position. In some embodiments, the lateral guard does not, or does not appreciably, project above the top guard even when in its maximum cutting position.

Claims

1. A table saw, comprising:

a table with a work surface defining a plane and having an infeed region and an outfeed region;

a nominally planar, circular blade configured to extend at least partially above the work surface to cut a workpiece on the work surface as the workpiece is moved into contact with the blade, wherein the blade has a cutting region, opposed faces, and an orientation relative to the work surface;

a motor to drive rotation of the blade relative to the work surface;

a splitter having an orientation relative to the work surface;

a blade adjustment mechanism configured to change the orientation of the blade and the splitter relative to the work surface, wherein the blade adjustment mechanism is adapted to change at least a distance that the blade projects above the work surface, with the blade adjustment mechanism defining a maximum distance that the blade projects above the work surface;

a mounting mechanism configured to position the splitter adjacent the blade;

a blade guard extending from the splitter generally toward the infeed region of the work surface, wherein the blade guard includes a top guard that extends generally above the blade, and further wherein the top guard and the splitter form a splitter assembly; and

a lateral guard that forms a portion of the blade guard and which projects from the splitter assembly toward the work surface to at least partially obstruct contact with the blade by a user, wherein the lateral guard extends adjacent a face of the blade and is operatively coupled to the splitter assembly for movement within a range of positions relative to the top guard responsive to engagement of the lateral guard by a workpiece on the work surface, wherein the range of positions includes at least a non-cutting position, in which the lateral guard is positioned to be directly engaged by a workpiece on the infeed region of the work surface prior to engagement of the blade by the workpiece, and a plurality of cutting positions, in which the lateral guard is directly engaged by a workpiece on the work surface and in which the lateral guard is displaced from the non-cutting position, wherein the lateral guard includes a top portion and a bottom portion that both move relative to the top guard and which collectively define a vertical lateral guard distance therebetween, wherein the top portion is the portion of the lateral guard that extends a maximum distance above the work surface, wherein the bottom portion is the portion of the lateral guard that extends closest to the work surface, wherein the vertical lateral guard distance is measured normal to the plane of the work surface, wherein the lateral guard is configured such that the vertical lateral guard distance is less in the plurality of cutting positions than in the non-cutting position, wherein the plurality of cutting positions includes a maximum cutting position in which the bottom portion of the lateral guard is positioned further away from the work surface than in the rest of the plurality of cutting positions, and further wherein in the maximum cutting position the blade guard has a vertical lateral guard distance that is less than half of the maximum distance that the blade projects above the work surface.

2. The table saw of claim 1, wherein the vertical lateral guard distance in the maximum cutting position is less than one half of the vertical lateral guard distance in the non-cutting position.

3. The table saw of claim 1, wherein the top guard has a thickness measured normal to the work surface, and further wherein the vertical lateral guard distance in the maximum cutting position is less than twice the thickness of the top guard.

4. The table saw of claim 1, wherein the top guard has a thickness, and further wherein the vertical lateral guard distance in the maximum cutting position is not substantially greater than the thickness of the top guard.

5. The table saw of claim 1, wherein the top guard is secured in a defined orientation relative to the splitter, and further wherein the top guard has a vertical dimension that is less than the vertical lateral guard distance when the lateral guard is in the non-cutting position.

6. The table saw of claim 1, wherein the top guard is secured in a defined orientation relative to the splitter, and further wherein the top guard has a vertical dimension that is less than the vertical lateral guard distance in the plurality of cutting positions.

7. The table saw of claim 1, wherein the lateral guard is configured to be moved within the plurality of cutting positions responsive to the thickness of a workpiece on the infeed region of the work surface directly engaging the lateral guard.

8. The table saw of claim 1, wherein the lateral guard at least partially vertically collapses as the lateral guard is moved from the non-cutting position to a cutting position.

9. The table saw of claim 1, wherein the top portion of the lateral guard is configured to maintain its orientation relative to the work surface of the table as the lateral guard is moved between the non-cutting position and the plurality of cutting positions.

10. The table saw of claim 1, wherein the blade guard includes a pair of spaced-apart lateral guards;

with each of the lateral guards extending proximate a respective one of the sides of the blade, and further comprising a linkage assembly that interconnects the pair of lateral guards for collective movement relative to the splitter.

11. The table saw of claim 1, wherein in the plurality of cutting positions, the top portion of the lateral guard does not extend above the top guard.

12. The table saw of claim 1, wherein the top guard defines at least one lateral guard receiving recess, and further wherein in the plurality of cutting positions, the lateral guard extends into the at least one lateral guard receiving recess.

13. The table saw of claim 12, wherein the at least one lateral guard receiving recess extends into a bottom surface of the top guard.

14. The table saw of claim 13, wherein the plurality of cutting positions includes a maximum cutting position in which the lateral guard is positioned further away from the non-cutting position than in the rest of the plurality of cutting positions, and further wherein at least a substantial portion of the lateral guard extends into the at least one lateral guard receiving recess when the lateral guard is in the maximum cutting position.

15. The table saw of claim 1, wherein the plurality of cutting positions includes a maximum cutting position in which the lateral guard is positioned further away from the non-cutting position than in the rest of the plurality of cutting positions, wherein the top guard includes lateral edges, and further wherein in the maximum cutting position, the top and bottom portions of the lateral guard respectively extend proximate the lateral edges of the top guard.

16. The table saw of claim 1, wherein the lateral guard includes a plurality of interconnected segments.

17. The table saw of claim 16, wherein lateral guard includes a plurality of interconnected segments that are pivotally coupled to the splitter assembly.

18. The table saw of claim 16, wherein the plurality of interconnected segments are coupled for pivotal movement as a unit relative to the splitter as the lateral guard is moved.

19. The table saw of claim 18, wherein the plurality of interconnected segments extend generally parallel to each other when the lateral guard is in the non-cutting position and in the cutting position, and further wherein the plurality of interconnected segments are separated by less than 0.5 inches.

20. The table saw of claim 18, wherein the lateral guard further comprises a base member that interconnects the plurality of interconnected segments and extends proximate the table relative to the top guard.

21. The table saw of claim 16, wherein the plurality of interconnected segments includes a plurality of segments that are at least partially telescoping at least when the lateral guard is in the plurality of cutting positions.

22. The table saw of claim 16, wherein the lateral guard includes a plurality of interconnected segments that include at least a first segment that is connected to the top guard, a second segment that is connected to the first segment and not connected to the top guard, and a third segment that is connected to the second segment and not to the top guard.