Riving knife assembly for a dual bevel table saw

• US 7,137,327 B2
• Filed: 11/23/2004
• Issued: 11/21/2006
• Est. Priority Date: 10/31/2002
• Status: Active Grant

• Current Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Original Assignee: Black & Decker Incorporated (Stanley Black & Decker, Inc.)
• Inventors: Carroll, Craig A., Weston, Jeffrey D., Garcia, Jaime E.
• Primary Examiner(s): Peterson, Kenneth E.
• Assistant Examiner(s): NGUYEN, PHONG H
• Application Number:
  US10/996,193
• Publication Number:
  US 20050188806A1
• Time in Patent Office: 728 Days
• Field of Search: 831/021, 834/772, 834/711, 834/712, 834/713, 834/771, 834/73, 834/77, 834/90, 834/91, 835/81, 835/82, 838/60, 144/286.1, 144/286.5, 144/287, 451/454, 451/455, 409/134
• US Class Current: 83/102.1
• CPC Class Codes: B23D 45/067 the saw blade being adjustable according to depth or angle of cut
• CPC Class Codes: B23D 45/10 with a plurality of circular saw blades B23D45/143, B23D45/165 take precedence
• CPC Class Codes: B23D 45/105 operating within the same plane
• CPC Class Codes: B27B 5/30 for mounting or securing saw blades or saw spindles
• CPC Class Codes: B27G 19/08 Accessories for keeping open the saw kerf, e.g. riving knives or wedge plates
• CPC Class Codes: Y10T 83/2077 By kerf entering guide
• 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 83/773 Work-support includes passageway for tool [e.g., slotted table]
• CPC Class Codes: Y10T 83/8773 Bevel or miter cut

Abstract

An embodiment of the present invention is directed to a riving knife assembly for a dual bevel table saw, comprising: a first armature configured for coupling with a beveling member; a second armature adjustably and rotatably coupled with the first armature; a first mounting member coupled with the second armature; a first riving bracket coupled with the second armature and configured for adjustably coupling with a bearing retaining nut of a dual arbor assembly; a second riving bracket coupled with the first mounting member and configured for adjustably coupling with the inside of a first bore of a first height bracket; a quick release handle disposed upon the first mounting member; an eccentric shaft coupled with the quick release handle; and a riving knife configured with an engaging assembly for engaging with a locking pin or a guard assembly or a kickback finger system.

Claims

1. A riving knife assembly for a dual bevel table saw, comprising:

a first armature configured for coupling with a beveling member;

a second armature adjustably and rotatably coupled with the first armature;

a first mounting member coupled with the second armature;

a first riving bracket coupled with the second armature and configured for adjustably coupling with a bearing retaining nut of a dual arbor assembly;

a second riving bracket coupled with the first mounting member and configured for adjustably coupling with the inside of a first bore of a first height bracket;

a quick release handle disposed upon the first mounting member;

an eccentric shaft coupled with the quick release handle;

a locking pin having a locking pin body, a second mounting member, a head member coupled with a sheathing member, and a spring loaded assembly, the locking pin operationally coupled with the eccentric shaft; and

,

a riving knife configured with an engagement assembly for engaging with the locking pin;

wherein the spring loaded assembly enables the head member and a circular engagement member disposed on the locking pin body proximal to the head member of the locking pin to be set in a locked position and a release position relative to the second mounting member, the sheathing member and the riving knife;

wherein the locked and release positions are established by manipulation of the quick release handle.

2. A riving knife assembly as claimed in claim 1, wherein the first mounting member, the first armature, the second armature, the first riving bracket, and the second riving bracket are coupled in a manner which allows them to remain in the horizontal plane while raising/lowering of a saw blade occurs.

3. A riving knife assembly as claimed in claim 1, wherein the spring loaded assembly comprises a compression spring disposed within the locking pin body, the compression spring engaging on one end with a retaining member and on its opposite end with the head member, the compression spring biased to an original position which maintains the head member in the locked position.

4. A riving knife assembly as claimed in claim 1, wherein the engagement assembly is a slot defining a recess within the riving knife beginning at a first end of the riving knife, the slot further defining first and second locking assemblies, the first and second locking assemblies being circular apertures which allow the circular engagement member of the locking pin to slidably engage within preset locations and secure the position of the riving knife.

5. A riving knife assembly as claimed in claim 1, wherein the first mounting member is adjustably coupled with the second armature, the first riving bracket and the second riving bracket to allow for re-positioning of the locking pin for either right or left tilt operation of a dual bevel table saw assembly.

6. A riving knife assembly as claimed in claim 1, wherein either of two opposing sides of the first mounting member are configured for being removably coupled with the second armature, the bearing retaining nut and the inside of the first bore.

7. A riving knife assembly as claimed in claim 1, wherein the quick release handle is configured for being removably coupled from either of two opposing ends of the eccentric shaft.

8. A riving knife assembly for a dual bevel table saw, comprising:

a first armature configured for coupling with a beveling member;

a second armature adjustably and rotatably coupled with the first armature;

a first mounting member coupled with the second armature;

a first riving bracket coupled with the second armature and configured for adjustably coupling with a bearing retaining nut of a dual arbor assembly;

a second riving bracket coupled with the first mounting member and configured for adjustably coupling with the inside of a first bore of a first height bracket;

a quick release handle disposed upon the first mounting member;

an eccentric shaft coupled with the quick release handle;

a locking pin having a locking pin body, a second mounting member, a head member coupled with a sheathing member, and a spring loaded assembly, the locking pin operationally coupled with the eccentric shaft; and

,

a riving knife configured with an engagement assembly for engaging with the locking pin and further configured with a plurality of slots for engaging with a guard assembly;

wherein the spring loaded assembly enables the head member and a circular engagement member disposed on the locking pin body proximal to the head member of the locking pin to be set in a locked position and a release position relative to the second mounting member, the sheathing member and the riving knife;

wherein the locked and release positions are established by manipulation of the quick release handle.

9. A riving knife assembly as claimed in claim 8, wherein the first mounting member, the first armature, the second armature, the first riving bracket, and the second riving bracket are coupled in a manner which allows them to remain in the horizontal plane while raising/lowering of a saw blade occurs.

10. A riving knife assembly as claimed in claim 8, wherein the spring loaded assembly comprises a compression spring disposed within the locking pin body, the compression spring engaging on one end with a retaining member and on its opposite end with the head member, the compression spring biased to an original position which maintains the head member in the locked position.

11. A riving knife assembly as claimed in claim 8, wherein the engagement assembly is a slot defining a recess within the riving knife beginning at a first end of the riving knife, the slot further defining first and second locking assemblies, the first and second locking assemblies being circular apertures which allow the circular engagement member of the locking pin to slidably engage within preset locations and secure the position of the riving knife.

12. A riving knife assembly as claimed in claim 8, wherein the first mounting member is adjustably coupled with the second armature, the first riving bracket and the second riving bracket to allow for re-positioning of the locking pin for either right or left tilt operation of a dual bevel table saw assembly.

13. A riving knife assembly as claimed in claim 8, wherein either of two opposing sides of the first mounting member are configured for being removably coupled with the second armature, the bearing retaining nut and the inside of the first bore.

14. A riving knife assembly as claimed in claim 8, wherein the quick release handle is configured for being removably coupled from either of two opposing ends of the eccentric shaft.

15. A riving knife assembly as claimed in claim 8, wherein a guard assembly is coupled with the riving knife via the slots, the guard assembly including first and second guards slidably coupled with opposing sides of a center member, the center member adjustably coupled with the riving knife via the slots, the center member configured to substantially encompass a saw blade.

16. A riving knife assembly as claimed in claim 15, wherein the first and second guards are configured to move independently of each other and in a vertical position relative to the center member.

17. A riving knife assembly for a dual bevel table saw, comprising:

a first armature configured for coupling with a beveling member;

a second armature adjustably and rotatably coupled with the first armature;

a first mounting member coupled with the second armature;

a first riving bracket coupled with the second armature and configured for adjustably coupling with a bearing retaining nut of a dual arbor assembly;

a second riving bracket coupled with the first mounting member and configured for adjustably coupling with the inside of a first bore of a first height bracket;

a quick release handle disposed upon the first mounting member;

an eccentric shaft coupled with the quick release handle;

a locking pin having a locking pin body, a second mounting member, a head member coupled with a sheathing member, and a spring loaded assembly, the locking pin operationally coupled with the eccentric shaft; and

,

a riving knife configured with an engagement assembly for engaging with the locking pin, further configured with a plurality of slots and one or more connectors for coupling with a kickback finger system;

wherein the spring loaded assembly enables the head member and a circular engagement member disposed on the locking pin body proximal to the head member of the locking pin to be set in a locked position and a release position relative to the second mounting member, the sheathing member and the riving knife;

wherein the locked and release positions are established by manipulation of the quick release handle.

18. A riving knife assembly as claimed in claim 17, wherein the first mounting member, the first armature, the second armature, the first riving bracket, and the second riving bracket are coupled in a manner which allows them to remain in the horizontal plane while raising/lowering of a saw blade occurs.

19. A riving knife assembly as claimed in claim 17, wherein the spring loaded assembly comprises a compression spring disposed within the locking pin body, the compression spring engaging on one end with a retaining member and on its opposite end with the head member, the compression spring biased to an original position which maintains the head member in the locked position.

20. A riving knife assembly as claimed in claim 17, wherein the engagement assembly is a slot defining a recess within the riving knife beginning at a first end of the riving knife, the slot further defining first and second locking assemblies, the first and second locking assemblies being circular apertures which allow the circular engagement member of the locking pin to slidably engage within preset locations and secure the position of the riving knife.

21. A riving knife assembly as claimed in claim 17, wherein the first mounting member is adjustably coupled with the second armature, the first riving bracket and the second riving bracket to allow for re-positioning of the locking pin for either right or left tilt operation of a dual bevel table saw assembly.

22. A riving knife assembly as claimed in claim 17, wherein either of two opposing sides of the first mounting member are configured for being removably coupled with the second armature, the bearing retaining nut and the inside of the first bore.

23. A riving knife assembly as claimed in claim 17, wherein the quick release handle is configured for being removably coupled from either of two opposing ends of the eccentric shaft.

24. A riving knife assembly as claimed in claim 17, wherein a kickback finger system is coupled with the riving knife via the slots and connectors, the kickback finger system including a mounting member, a first kickback finger assembly, a second kickback finger assembly and a follower, the follower being disposed with a kickback stop pin.

25. A riving knife assembly as claimed in claim 24, wherein the mounting member is removably coupled with the riving knife and adjustably coupled with the first kickback finger assembly, the second kickback finger assembly and the follower, the follower adjusting its vertical position to correspond with the vertical position of a saw blade, thereby establishing the vertical position of the kickback finger assemblies and not allowing the kickback finger assemblies to drop below the kickback stop pin.