Circular saw splitter device with integral anti-kick back

• US 6,170,370 B1
• Filed: 07/06/1999
• Issued: 01/09/2001
• Est. Priority Date: 08/19/1998
• Status: Expired due to Fees

• Current Assignee: Sommerville Design & Manufacturing, Inc.
• Original Assignee: Sommerville Design & Manufacturing, Inc.
• Inventors: Sommerville, Thomas R.
• Primary Examiner(s): BRAY, WAYMOND D
• Application Number:
  US09/347,654
• Time in Patent Office: 553 Days
• Field of Search: 831/021, 838/27, 838/23, 836/981.1, 83D/IG.1, 403/409.1, 403/DIG.8, 403/DIG.12
• US Class Current: 83/102.1
• CPC Class Codes: B27G 19/08 Accessories for keeping open the saw kerf, e.g. riving knives or wedge plates
• CPC Class Codes: Y10S 403/08 Radially acting cam or eccentric
• CPC Class Codes: Y10T 403/76 having a cam, wedge, or tapered portion
• CPC Class Codes: Y10T 83/2077 By kerf entering guide
• CPC Class Codes: Y10T 83/9457 Joint or connection

Abstract

A device for securing a table saw accessory downstream of a saw blade. The device comprises a mount for securing the device to a table saw beneath a throat plate of table saw; a slide for receiving a stem carrying a table saw accessory; a releasable detent for capturing such stem and holding a table saw accessory in place; and an actuator for releasing the detent. The actuator is actuated from directly above and moveable downwardly vertically to release the detent. The device is particularly suited to quick change of saw splitter devices.

Claims

1. A device for securing a table saw accessory downstream of a saw blade, said device comprising:

i) a mount for securing said device to a table saw beneath a throat plate of table saw;

ii) a slide for receiving a stem carrying a table saw accessory;

iii) a releasable detent for capturing such stem and holding a table saw accessory in place;

iv) an actuator for releasing said detent, said actuator being actuated from directly above and moveable downwardly vertically to release said detent.

2. A device of claim 1 wherein said detent receives such stem and is displaced upon insertion of such stem in said slide and snap fits into cooperating detent component on such stem to capture such stem.

3. A device of claim 2 wherein said detent is a rotatable cam biased to a home position for recapturing such stem.

4. A device of claim 3 wherein said actuator is a lever which is connected to said cam and is movable downwardly to release said detent.

5. A device of claim 1 in combination with a table saw accessory carried by a stem, said stem having a detent component for cooperating with said detent, said component snapping into said detent upon downward insertion of said stem into said slide.

6. A device of claim 5 wherein said accessory is a splitter for alignment with a saw blade kerf.

7. A device of claim 6 wherein said splitter comprises a range of splitter sizes, each provided on a separate stem for quick disconnect and replacement with a different size splitter.

8. A device of claim 6 mounted on table saw beneath a throat plate of said table saw, said mount being secured to an arbor of said table saw so as to tilt with a saw blade of said table saw.

9. A device of claim 6 wherein said cam has a flat which is engaged by said stem on downward insertion of said stem into said slide, said cam rotating to allow said stem to pass along side said cam, said cam rotating back to a home position when said cam encounters said detent component on said stem.

10. A device of claim 9 wherein said detent component is a recess which cooperates with said cam profile to lock and capture said stem in place.

11. A device of claim 10 wherein said stem has a rounded lower portion for engaging said cam flat.

12. A device of claim 6 wherein said splitter comprises a bulging nose portion, a reduced intermediate portion and outwardly biased, outwardly flared opposing wing portions for continuously engaging sides of a saw kerf in a workpiece.

13. A device of claim 12 wherein said flared wing portions have tips which bit into saw kerf sides in event of saw blade kick back.

14. A device of claim 13 wherein said wing tip portions have downwardly directed raised portions to effect hold down of a work piece as it travels by said splitter.

15. A device of claim 12 wherein said splitter is formed from spring steel.

16. A splitter for use on a table saw comprising a bulging nose portion, a reduced intermediate portion and outwardly biased, outwardly flared opposing wing portions for continuously engaging sides of a saw kerf in a workpiece.

17. A splitter of claim 16 wherein said flared wing portions have tips which bit into saw kerf sides in event of saw blade kick back.

18. A splitter of claim 17 wherein said wing tip portions have downwardly directed raised portions to effect hold down of a work piece as it travels by said splitter.

19. A splitter of claim 16 of formed from spring steel.

20. A splitter of claim 16 of predetermined height to accommodate a dado cut of predetermined height.

21. A splitter claim 16 of predetermined width at said opposing wing portions to accommodate a kerf of predetermined width.