U.S. patent number D351,174 [Application Number D/010,851] was granted by the patent office on 1994-10-04 for roof drill bit for mining machine.
Invention is credited to William J. Brady.
United States Patent |
D351,174 |
Brady |
October 4, 1994 |
Roof drill bit for mining machine
Claims
The ornamental design for a roof drill bit for mining machine, as
shown and described.
Inventors: |
Brady; William J. (Creve Coeur,
MO) |
Appl.
No.: |
D/010,851 |
Filed: |
July 19, 1993 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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706113 |
May 23, 1991 |
D. 340248 |
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Current U.S.
Class: |
D15/139 |
Field of
Search: |
;175/379,385,393,418,420.1,421,430,427,431,432 ;299/29
;D10/138,139 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Douglas; Alan P.
Assistant Examiner: Davis; Antoine D.
Attorney, Agent or Firm: Heywood; Richard G.
Description
FIG. 1 is a top plan view of a roof drill bit for mining machine
illustrating one embodiment of the invention;
FIG. 2 is a side elevational view of the roof drill bit for mining
machine of FIG. 1, the opposite side being a mirror image;
FIG. 3 is another side elevational view of the roof drill for
mining machine, as rotated 90 degrees clockwise from FIGS. 1 and 2
thereof, the opposite side being a mirror image;
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 similiar to FIG. 1, but showing a second
embodiment of the roof drill bit for mining machine;
FIG. 7 is a side elevational view of the second roof drill bit for
mining machine embodiment shown in FIG. 6, the opposite side being
a mirror image;
FIG. 8 is another side elevational view of the second roof drill
bit for mining machine, as rotated 90 degrees clockwise from FIGS.
6 and 7 thereof, the opposite side being a mirror image;
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 representation of the fragmentary drive steel end portion of
the mining machine shown in phantom lines is for environmental
purposes only and non-limiting upon the scope of the invention.
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