GB171792A - Improvements in or relating to stone drills or augers - Google Patents
Improvements in or relating to stone drills or augersInfo
- Publication number
- GB171792A GB171792A GB2463420A GB2463420A GB171792A GB 171792 A GB171792 A GB 171792A GB 2463420 A GB2463420 A GB 2463420A GB 2463420 A GB2463420 A GB 2463420A GB 171792 A GB171792 A GB 171792A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tooth
- edge
- augers
- relating
- drills
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000004575 stone Substances 0.000 title abstract 2
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 230000036346 tooth eruption Effects 0.000 abstract 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
171,792. Stapf, A., and Hundrieser, H. Aug. 25, 1920. Drills for stone have a central offset cutting- edge 2, Fig. 1, and circumferential cutting-teeth 4, 5, the tooth 4 preferably being less in width and greater in projection than the tooth 5. The edge 2 is connected with the root of the tooth 4 by a sloping edge 3. In a modification, the inner edge of the tooth 4 is also in. clined. In a further modification, the circumferential cutting members comprise arcuate blades 22, 23, Fig. 6, secured on the shouldered down end of the shank by a screw 25 that also secures the central blade in a transverse slot. The blades 22, 23 are flanged at 22<1>, 23<1>.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2463420A GB171792A (en) | 1920-08-25 | 1920-08-25 | Improvements in or relating to stone drills or augers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2463420A GB171792A (en) | 1920-08-25 | 1920-08-25 | Improvements in or relating to stone drills or augers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB171792A true GB171792A (en) | 1921-11-25 |
Family
ID=10214798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2463420A Expired GB171792A (en) | 1920-08-25 | 1920-08-25 | Improvements in or relating to stone drills or augers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB171792A (en) |
-
1920
- 1920-08-25 GB GB2463420A patent/GB171792A/en not_active Expired
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