Concrete/masonry cutting device with fast-start design and interlocking reinforcement

Patent metadata

Field	Value
Publication number	US-10124510-B2
Application number	US-201415525144-A
Country	US
Kind code	B2
Filing date	Nov 12, 2014
Priority date	Nov 12, 2014
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A diamond cutting tool ( 200; 200 ′) for enabling a fast cutting start may include a rotatable main body ( 210 ) and a cutting portion ( 220 ). The rotatable main body may include a substantially circular periphery. The cutting portion may include an interlocking support assembly ( 280 ) and a plurality of notched cutters ( 270 ). The notched cutters may be disposed around the circular periphery extending outwardly from the main body. The notched cutters ( 270 ) may be formed of a first diamond-metal matrix. The interlocking support assembly ( 280 ) may be provided radially outwardly of the notched cutters and may include a softer diamond-metal matrix and/or a different diamond concentration therein than the first diamond-metal matrix. The interlocking support assembly may include a reinforcement portion ( 284 ) disposed between the notched cutters ( 270 ) and a top section ( 282 ) covering radially distal portions of the notched cutters.

First claim

The invention claimed is:

1. A diamond cutting tool for enabling a fast cutting start, the tool comprising:
a rotatable main body having a substantially circular periphery; and
a cutting portion comprising:
a plurality of notched cutters disposed around a portion of the circular periphery extending outwardly from the main body, the notched cutters being formed of a first diamond-metal matrix; and
an interlocking support assembly provided outwardly of the notched cutters, the interlocking support assembly comprising a softer diamond-metal matrix or a different diamond concentration therein than the first diamond-metal matrix,
wherein the interlocking support assembly includes a reinforcement portion disposed between the notched cutters and a top section covering radially distal portions of the notched cutters, wherein the notched cutters are separated from each other by the reinforcement portion.

2. The tool of claim 1 , wherein the main body comprises a steel core, and the notched cutters are affixed to the main body by welding, brazing, soldering, sintering, gluing or other adhesive agents.

3. The tool of claim 1 , wherein the cutting portion is divided into a plurality of cutting segments, the cutting segments divided by slots extending inwardly from an outer periphery of the blade toward an axis of the main body, each of the cutting segments including multiple notched cutters and multiple reinforcement portions.

4. The tool of claim 1 , wherein a hardness of the interlocking support assembly is lower than a hardness of the notched cutters.

5. The tool of claim 1 , wherein the top section has a second diamond-metal matrix having a softer diamond-metal matrix or a different diamond concentration than the first diamond-metal matrix.

6. The tool of claim 5 , wherein the reinforcement portion comprises a third diamond-metal matrix having a lower diamond concentration or a softer diamond-metal matrix than the first diamond-metal matrix and the second diamond-metal matrix.

7. The tool of claim 1 , wherein the top section extends over at least one reinforcement portion and at least two notched cutters in each of the cutting segments.

8. The tool of claim 1 , wherein the top section has a lower hardness or a different diamond concentration than the notched cutters.

9. The tool of claim 1 , wherein the notched cutters comprise a first cold pressed segment and the interlocking support assembly comprises a second cold pressed segment.

10. The tool of claim 9 , wherein the first cold pressed segment and the second cold pressed segment are hot pressed or sintered together.

11. The tool of claim 1 , wherein the main body comprises a substantially plate-like structure, wherein the interlocking support assembly is provided radially outwardly of the notched cutters, and wherein the tool comprises a saw blade.

12. The tool of claim 1 , wherein the main body comprises a hollow cylindrical structure, wherein the interlocking support assembly is provided in-line with cylindrical walls of the main body and the notched cutters, and wherein the tool comprises a core bit.

13. A saw assembly comprising:
a motor; and
a saw blade comprising:
a rotatable main body having a substantially circular periphery; and
a cutting portion comprising:
a plurality of notched cutters disposed around a portion of the circular periphery extending outwardly from the main body, the notched cutters being formed of a first diamond-metal matrix; and
an interlocking support assembly provided outwardly of the notched cutters, the interlocking support assembly comprising a softer diamond-metal matrix or a different diamond concentration therein than the first diamond-metal matrix,

wherein the interlocking support assembly includes a reinforcement portion disposed between the notched cutters and a top section covering radially distal portions of the notched cutters, wherein the notched cutters are separated from each other by the reinforcement portion.

14. A drill assembly comprising;
a motor; and
a core bit comprising:
a rotatable main body having a substantially circular periphery; and
a cutting portion comprising:
a plurality of notched cutters disposed around a portion of the circular periphery extending outwardly from the main body, the notched cutters being formed of a first diamond-metal matrix; and
an interlocking support assembly provided outwardly of the notched cutters, the interlocking support assembly comprising a softer diamond-metal matrix or a different diamond concentration therein than the first diamond-metal matrix,

wherein the interlocking support assembly includes a reinforcement portion disposed between the notched cutters and a top section covering radially distal portions of the notched cutters, wherein the notched cutters are separated from each other by the reinforcement portion.

15. A diamond cutting tool comprising:
a rotatable main body having a substantially circular periphery; and
a cutting portion comprising:
a plurality of notched cutters disposed around a portion of the circular periphery extending outwardly from the main body, the notched cutters being formed of a first diamond-metal matrix; and
an interlocking support assembly provided outwardly of the notched cutters, the interlocking support assembly comprising a softer diamond-metal matrix or a different diamond concentration therein than the first diamond-metal matrix,

wherein the interlocking support assembly includes a reinforcement portion disposed between the notched cutters and a top section covering radially distal portions of the notched cutters, wherein the notched cutters are separated from each other by the reinforcement portion, and
wherein the notched cutters comprise a first cold pressed segment and the interlocking support assembly comprises a second cold pressed segment, the first cold pressed segment and the second cold pressed segment being hot pressed or sintered together to form a single segment with reinforcement portions and a top section extending over the notched cutters.

16. The tool of claim 1 , wherein the top section has a uniform depth over each of the notched cutters.

17. The assembly of claim 13 , wherein the top section has a uniform depth over each of the notched cutters.

18. The tool of claim 1 , wherein the top section has a first edge and a second edge opposite from the first edge, wherein the first edge forms a periphery of the cutting portion, and wherein the reinforcement portion is disposed between the notched cutters and extends to the first edge of the top section.

19. The assembly of claim 13 , wherein the top section has a first edge and a second edge opposite from the first edge, wherein the first edge forms a periphery of the cutting portion, and wherein the reinforcement portion is disposed between the notched cutters and extends to the first edge of the top section.

20. The tool of claim 1 , wherein the cutting portion is divided into a plurality of cutting segments, each of the cutting segments including multiple notched cutters and multiple reinforcement portions, wherein the top section extends over a length of each of the cutting segments at a uniform depth.

Assignees

• Husqvarna Ab

Inventors

• Fleetwood Jon
• Siva John

Classifications

• B28D1/041

  with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles · CPC title

• B28D1/121 Primary

  Circular saw blades · CPC title

• B28D1/045

  Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut · CPC title

• B23D65/00

  Making tools for sawing machines or sawing devices for use in cutting any kind of material · CPC title