GB1280065A - Rock drills - Google Patents
Rock drillsInfo
- Publication number
- GB1280065A GB1280065A GB2606670A GB2606670A GB1280065A GB 1280065 A GB1280065 A GB 1280065A GB 2606670 A GB2606670 A GB 2606670A GB 2606670 A GB2606670 A GB 2606670A GB 1280065 A GB1280065 A GB 1280065A
- Authority
- GB
- United Kingdom
- Prior art keywords
- drill
- radius
- end section
- forms
- section
- 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
- 239000011435 rock Substances 0.000 title abstract 2
- 238000005452 bending Methods 0.000 abstract 2
- 239000000428 dust Substances 0.000 abstract 2
- 230000001154 acute effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000009527 percussion Methods 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
- E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
- Drilling Tools (AREA)
Abstract
1280065 Percussive drills HAWERA HARTMETALL-WERKZEUGFABRIK RAVENSBURG GmbH 29 May 1970 [30 May 1969] 26066/70 Heading B4C [Also in Division B3] A rotary-percussion rock drill includes a helical cut-in groove 6 for discharging dust, the groove profile including a flat, or substantially flat portion 7 extending over at least one third of the groove width B and an end section 8 for supporting the dust. The section 8 forms an acute angle #, preferably at 75-80‹, with an outer surface 5, while an opposite end section 9 forms an angle γ of 130-140‹ with the surface 5. The pitch angle α may be up to 30‹, preferably below 20‹, and a soldered-in metal plate 3 forms cutting edges 4. An arcuate section 10 of the end section 8 has a radius of about 45-60% of the difference between the outer surface radius and the radius of the drill core region for up to 20 mm. overall diameter, or 25-45% for larger diameters. For reducing bending stresses in the drill, the cross sectional diameter of the core region of the drill may increase towards the tip, e.g. to 110-140% of the diameter towards the shank, bending stresses thus being conveyed to the shank zone (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19691927754 DE1927754C3 (en) | 1969-05-30 | 1969-05-30 | Rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1280065A true GB1280065A (en) | 1972-07-05 |
Family
ID=5735705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2606670A Expired GB1280065A (en) | 1969-05-30 | 1970-05-29 | Rock drills |
Country Status (11)
| Country | Link |
|---|---|
| AT (1) | AT296189B (en) |
| BE (1) | BE750655A (en) |
| CA (1) | CA961029A (en) |
| CH (1) | CH519094A (en) |
| DE (1) | DE1927754C3 (en) |
| DK (1) | DK137867B (en) |
| FR (1) | FR2048559A5 (en) |
| GB (1) | GB1280065A (en) |
| LU (1) | LU60960A1 (en) |
| NL (1) | NL162586C (en) |
| SE (1) | SE365574B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2735227C2 (en) * | 1977-08-04 | 1983-10-27 | Hawera Probst Gmbh + Co, 7980 Ravensburg | Rock drill |
| CH626557A5 (en) * | 1978-09-28 | 1981-11-30 | Guex Philippe & Fils Sa | |
| DE3014693A1 (en) * | 1980-04-16 | 1981-10-22 | Hilti AG, 9494 Schaan | ROCK DRILL |
| DE3834675A1 (en) * | 1988-10-12 | 1990-04-19 | Hawera Probst Kg Hartmetall | DRILLING TOOL |
| TW299385B (en) * | 1994-12-12 | 1997-03-01 | Black & Decker Inc | Cutting tools for drilling concrete, aggregate, masonry or the like materials |
| US5918105A (en) * | 1994-12-12 | 1999-06-29 | Black & Decker Inc. | Cutting tools for drilling concrete, aggregate, masonry or the like materials |
| US5641028A (en) * | 1995-08-10 | 1997-06-24 | Black & Decker Inc. | Drill bit with debris conveying flute |
| DE102016225458A1 (en) * | 2016-12-19 | 2018-06-21 | Robert Bosch Gmbh | Ultraschallbohrwerkzeug |
-
1969
- 1969-05-30 DE DE19691927754 patent/DE1927754C3/en not_active Expired
-
1970
- 1970-04-09 CH CH529170A patent/CH519094A/en not_active IP Right Cessation
- 1970-04-13 AT AT333870A patent/AT296189B/en active
- 1970-04-21 NL NL7005722A patent/NL162586C/en not_active IP Right Cessation
- 1970-04-29 SE SE05936/70A patent/SE365574B/xx unknown
- 1970-05-20 FR FR7018282A patent/FR2048559A5/fr not_active Expired
- 1970-05-20 BE BE750655D patent/BE750655A/en not_active IP Right Cessation
- 1970-05-21 LU LU60960D patent/LU60960A1/xx unknown
- 1970-05-28 DK DK272470A patent/DK137867B/en unknown
- 1970-05-29 GB GB2606670A patent/GB1280065A/en not_active Expired
- 1970-05-29 CA CA084,099A patent/CA961029A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL162586C (en) | 1980-06-16 |
| FR2048559A5 (en) | 1971-03-19 |
| DE1927754B2 (en) | 1978-04-27 |
| DE1927754A1 (en) | 1970-12-17 |
| CA961029A (en) | 1975-01-14 |
| NL7005722A (en) | 1970-12-02 |
| CH519094A (en) | 1972-02-15 |
| DE1927754C3 (en) | 1978-12-14 |
| NL162586B (en) | 1980-01-15 |
| BE750655A (en) | 1970-11-03 |
| LU60960A1 (en) | 1970-07-21 |
| DK137867B (en) | 1978-05-22 |
| SE365574B (en) | 1974-03-25 |
| AT296189B (en) | 1972-02-10 |
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| Petherbridge | At the Other End of the Line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |