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Attack tool

Attack tool description/claims

This application is a continuation of U.S. patent application Ser. No. 11/463,998 which is a continuation-in-part of U.S. patent application Ser. No. 11/463,990 which was filed on Aug. 11, 2006 and entitled An Attack Tool. U.S. patent application Ser. No. 11/463,990 is a continuation-in-part of U.S. patent application Ser. No. 11/463,975 which was filed on Aug. 11, 2006 and entitled An Attack Tool. U.S. patent application Ser. No. 11/463,975 is a continuation-in-part of U.S. patent application Ser. No. 11/463,962 which was filed on Aug. 11, 2006 and entitled An Attack Tool. All of these applications are herein incorporated by reference for all that it contains.

Formation degradation, such as asphalt milling, mining, or excavating, may result in wear on attack tools. Consequently, many efforts have been made to extend the life of these tools. Examples of such efforts are disclosed in U.S. Pat. No. 4,944,559 to Sionnet et al., U.S. Pat. No. 5,837,071 to Andersson et al., U.S. Pat. No. 5,417,475 to Graham et al., U.S. Pat. No. 6,051,079 to Andersson et al., and U.S. Pat. No. 4,725,098 to Beach, all of which are herein incorporated by reference for all that they disclose.

In one aspect of the invention, an attack tool has a wear-resistant base suitable for attachment to a driving mechanism. A first end of a generally frustoconical first cemented metal carbide segment bonded to the base. A second metal carbide segment is bonded to a second end of the first carbide segment at an interface opposite the base. The first end has a cross sectional thickness of about 0.250 to 0.750 inches and the second end has a cross sectional thickness of about 1 to 1.50 inches. The first cemented metal carbide segment also has a volume of 0.250 cubic inches to 0.600 cubic inches. In this disclosure, the abbreviation “HRc” stands for the Rockwell Hardness “C” scale, and the abbreviation “HK” stands for Knoop Hardness.

FIG. 1 is a cross-sectional diagram of an embodiment of attack tools on a rotating drum attached to a motor vehicle.

FIG. 2 is an orthogonal diagram of an embodiment of an attack tool and a holder.

FIG. 3 is an orthogonal diagram of another embodiment of an attack tool.

FIG. 4 is an orthogonal diagram of another embodiment of an attack tool.

FIG. 5 is a perspective diagram of a first cemented metal carbide segment.

FIG. 6 is an orthogonal diagram of an embodiment of a first cemented metal carbide segment.

FIG. 7 is an orthogonal diagram of another embodiment of a first cemented metal carbide segment.

FIG. 8 is an orthogonal diagram of another embodiment of a first cemented metal carbide segment.

FIG. 9 is an orthogonal diagram of another embodiment of a first cemented metal carbide segment.

FIG. 10 is an orthogonal diagram of another embodiment of a first cemented metal carbide segment.

FIG. 11 is a cross-sectional diagram of an embodiment of a second cemented metal carbide segment and a superhard material.

• Provisional Patent
• Utility Patent

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