Asymmetrical button insert for rock drilling

- Sandvik AB
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Description

FIG. 1 is a right side view of an asymmetrical button insert for rock drilling showing our new design;

FIG. 2 is a side view of the asymmetrical button insert for rock drilling taken at 90.degree. of the view of FIG. 1;

FIG. 3 is a front end view of the asymmetrical button insert for rock drilling;

FIG. 4 is a perspective view, taken from the right side and sightly above, of the asymmetrical button insert for rock drilling; and,

FIG. 5 is a perspective view showing the opposite side of the asymmetrical button insert for rock drilling shown in FIG. 4.

Referenced Cited
U.S. Patent Documents
D357485 April 18, 1995 Mattsson et al.
D357486 April 18, 1995 Mattsson et al.
4359335 November 16, 1982 Garner
4722405 February 2, 1988 Langford, Jr.
5172777 December 22, 1992 Siracki et al.
5172779 December 22, 1992 Sinacki et al.
5421424 June 6, 1995 Portwood et al.
Patent History
Patent number: D371146
Type: Grant
Filed: Apr 12, 1995
Date of Patent: Jun 25, 1996
Assignee: Sandvik AB (Sandviken)
Inventors: Udo Fischer (Vallingby), Torbjorn Hartzell (Stockholm), Kauko Karki (Skogas)
Primary Examiner: Antoine Duval Davis
Law Firm: Burns, Doane, Swecker & Mathis
Application Number: 0/37,415
Classifications
Current U.S. Class: Cutting Tool, E.g., Drill Bit, Etc. (D15/139)