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Roof drill bit for mining |
| D340248 |
Roof drill bit for mining
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| Patent Drawings: | |
| Inventor: |
Brady |
| Date Issued: |
October 12, 1993 |
| Application: |
07/706,113 |
| Filed: |
May 23, 1991 |
| Inventors: |
Brady; William J. (Creve Coeur, MO)
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| Assignee: |
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| Primary Examiner: |
Ansher; Bernard |
| Assistant Examiner: |
Morris; Sandra |
| Attorney Or Agent: |
Heywood; Richard G. |
| U.S. Class: |
D15/139; D15/21 |
| Field Of Search: |
D15/21; D15/139; 175/377; 175/378; 175/393; 175/418; 175/420.1; 175/427; 175/430; 299/79 |
| International Class: |
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| U.S Patent Documents: |
D265205; D273390; D273391; 4285618; 4637658; 4683965; 4733734; 4817742; 4928777 |
| Foreign Patent Documents: |
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| Other References: |
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| Abstract: |
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| Claim: |
The ornamental design for a roof drill bit for mining, as shown and described. |
| Description: |
FIG. 1 is a top plan view of a roof drill bit for mining illustrating one embodiment of the invention;
FIG. 2 is a side elevational view of the roof drill bit of FIG. 1, the opposite side view therefrom being the same;
FIG. 3 is another side elevational view of the roof drill bit, as rotated 90.degree. clockwise from the FIGS 1 and 2 position thereof, the opposite side view therefrom being the same;
FIG. 4 is a bottom view of the roof drill bit of FIG. 1;
FIG. 5 is a perspective view of the roof drill bit of FIG. 1;
FIG. 6 is a top plan view similar to FIG. 1, but showing a second embodiment of the roof drill bit for mining;
FIG. 7 is a side elevational view of the second roof drill bit embodiment shown in FIG. 6, the opposite side view therefrom being the same;
FIG. 8 is another side elevational view of the second roof drill bit embodiment, as rotated 90.degree. clockwise from the FIGS. 6 and 7 position thereof, the opposite side view therefrom being the same;
FIG. 9 is a bottom view of the roof drill bit embodiment of FIG. 6; and,
FIG. 10 is a perspective view of the roof drill bit of FIG. 6.
The fluted shank illustrated in phantom lines in FIGS. 2, 3, 5 and 7, 8, 10 is shown for environmental purposes and is non-limiting upon the scope of the invention.
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