Bolt Lock For Saw Blades

• US 20080289470A1
• Filed: 06/10/2008
• Published: 11/27/2008
• Est. Priority Date: 12/08/2006
• Status: Abandoned Application

• Current Assignee: Diamond Products Limited
• Original Assignee: Diamond Products Limited
• Inventors: Aston, James
• Application Number:
  US12/136,106
• Publication Number:
  US 20080289470A1
• Time in Patent Office: Days
• US Class Current: 83/698.41
• CPC Class Codes: B27B 5/32 Devices for securing circular saw blades to the saw spindle
• CPC Class Codes: F16B 39/10 by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the boltF16B39/08 takes precedence
• CPC Class Codes: Y10T 83/9464 For rotary tool

Abstract

A bolt lock is described for attachment to a blade collar of a concrete saw. The bolt lock stabilizes the position of a blade collar mounting bolt thereby preventing the bolt from loosening, which could otherwise result in the blade disengaging from the concrete saw.

Claims

1. A bolt lock adapted for engagement alongside a blade collar securing a circular cutting blade to a rotating shaft of a saw, the bolt lock defining a first face to be directed toward the blade, an oppositely directed second face, and an outer edge extending between the first and second faces and extending about the outer periphery of the bolt lock, the bolt lock also defining a centrally disposed primary opening extending from the first face to the second face, the primary opening sized and shaped to fittingly receive a mounting bolt attaching the blade and blade collar to the rotating shaft, the bolt lock further defining a secondary opening spaced radially from the center of the bolt lock.

2. The bolt lock of claim 1 wherein the bolt lock comprises a raised center hub including a hub face and an arcuate wall extending between the hub face and the second face of the bolt lock, wherein the primary opening is defined in the hub face.

3. The bolt lock of claim 1 wherein the secondary opening is in the shape of a slot.

4. The bolt lock of claim 3 wherein the slot shape is arcuate.

5. The bolt lock of claim 4 wherein the arcuate slot defines an arcuate major axis, and the arcuate slot is defined such that the center point of the arcuate major axis coincides with the center of the bolt lock.

6. The bolt lock of claim 1 further defining a second secondary opening spaced radially from the center of the bolt lock.

7. A bolt lock assembly for securing engagement of a blade and blade collar with a rotating shaft of a saw, the bolt lock assembly comprising:

a bolt lock defining a first face to be directed toward the blade collar, an oppositely directed second face, and an outer edge extending between the first and second faces, the bolt lock also defining a central primary opening sized and shaped to fittingly receive a mounting bolt attaching the blade to the shaft of the saw, the bolt lock further defining a secondary opening spaced radially from the center of the bolt lock; and

at least one fastener extending through the secondary opening and threadedly received in the blade collar.

8. The bolt lock assembly of claim 7 wherein the at least one fastener includes a head, the assembly further comprising:

a locking member disposed between the second face of the bolt lock and the head of the fastener.

9. The bolt lock assembly of claim 7 wherein the bolt lock further defines a second secondary opening spaced radially from the center of the bolt lock, and the at least one fastener includes two fasteners, each fastener extending through a corresponding secondary opening and threadedly received in the blade collar.

10. The bolt lock assembly of claim 7 wherein the bolt lock comprises a raised center hub including a hub face and an arcuate wall extending between the hub face and the second face of the bolt lock, wherein the primary opening is defined in the hub face.

11. The bolt lock assembly of claim 7 wherein the secondary opening is in the shape of a slot.

12. The bolt lock assembly of claim 7 further defining a second secondary opening spaced radially from the center of the bolt lock.

13. An assembly for securedly engaging a circular cutting blade to a rotating shaft of a saw, the assembly comprising:

a blade collar adapted to be positioned alongside the blade, the collar defining an inner face directed toward the blade, an oppositely directed outer face, a mounting aperture extending through a thickness of the collar and located at a center of the collar, and at least one threaded receiving aperture spaced from the center of the collar;

a mounting bolt extending through the mounting aperture defined in the blade collar and engaging the blade collar and the blade to the shaft, the mounting bolt having a head accessible along the outer face of the blade collar;

a bolt lock defining a first face to be directed toward the outer face of the blade collar, an oppositely directed second face, a central opening sized and shaped to fittingly receive the head of the mounting bolt, and a secondary opening spaced radially from a center of the bolt lock; and

at least one fastener extending through the secondary opening defined in the bolt lock and threadedly received in the at least one receiving aperture defined in the blade collar.

14. The assembly of claim 13 wherein a centrally disposed portion of the outer face of the blade collar is flat and generally parallel with the inner face of the blade collar.

15. The assembly of claim 13 wherein the mounting bolt includes a threaded region, and the threads are left hand threads.

16. The assembly of claim 13 further comprising:

a locking member disposed between the head of the mounting bolt and the outer face of the blade collar.

17. The assembly of claim 13 wherein the bolt lock comprises a raised center hub including a hub face and an arcuate wall extending between the hub face and the second face of the bolt lock, wherein the primary opening is defined in the hub face.

18. The assembly of claim 13 wherein the secondary opening defined in the bolt lock is in the shape of a slot.

19. The assembly of claim 13 wherein the bolt lock further defines a second secondary opening spaced radially from the center of the bolt lock.

20. The assembly of claim 13 wherein the saw is a concrete saw.