ATE19130T1 - IMPACT DRILL. - Google Patents
IMPACT DRILL.Info
- Publication number
- ATE19130T1 ATE19130T1 AT82304174T AT82304174T ATE19130T1 AT E19130 T1 ATE19130 T1 AT E19130T1 AT 82304174 T AT82304174 T AT 82304174T AT 82304174 T AT82304174 T AT 82304174T AT E19130 T1 ATE19130 T1 AT E19130T1
- Authority
- AT
- Austria
- Prior art keywords
- piston
- bit
- tube
- cylinder
- drills
- Prior art date
Links
- 238000007789 sealing Methods 0.000 abstract 2
- 238000013459 approach Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 abstract 1
- 239000004033 plastic Substances 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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)
- Earth Drilling (AREA)
- Valve Device For Special Equipments (AREA)
- Percussive Tools And Related Accessories (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
The invention relates to percussive drills for earth boring, and particularly to so-called valveless drills. In such drills it is important to allow, cyclically, compressed air to pass into the bore hole to clear debris through a central hole in the bit which central hole needs to be closed to allow the return stroke of the piston. This has been provided for hitherto by a short tube usually of plastics material, secured to the innermost end of the bit so that as the piston approaches the bit on the drive stroke the tube engages in a counterbore in the piston to seal the bore through the bit. Such short tubes are frequently damaged causing cessation of operation of the drill whilst down the hole, a circumstance that is to be avoided. The objective of the invention is to avoid the above disadvantage, which objective is met by a construction comprising an outer wear tube (1), compressed air inlet means (2) to one end of the wear tube, chuck means (3) for holding a drill bit (4) to the opposite end of the wear tube, a cylinder (5) located within the wear tube with an annular gap therebetween, an air diverter (6) located at the end of the cylinder towards the air inlet, a sealing bearing (7) located at the end of the cylinder towards the chuck, and a piston (10) within the cylinder, said piston having a portion (15) of reduced diameter adapted to pass through the sealing bearing to strike a bit held in the chuck, and there being porting (8, 9) to direct air to one side or the other of the piston to provide a drive and a return stroke.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8137261 | 1981-12-10 | ||
EP82304174A EP0081897B1 (en) | 1981-12-10 | 1982-08-06 | Percussive drills |
Publications (1)
Publication Number | Publication Date |
---|---|
ATE19130T1 true ATE19130T1 (en) | 1986-04-15 |
Family
ID=10526521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT82304174T ATE19130T1 (en) | 1981-12-10 | 1982-08-06 | IMPACT DRILL. |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0081897B1 (en) |
AT (1) | ATE19130T1 (en) |
DE (1) | DE3270411D1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5662180A (en) * | 1995-10-17 | 1997-09-02 | Dresser-Rand Company | Percussion drill assembly |
US5957220A (en) * | 1995-10-17 | 1999-09-28 | Dresser-Rand Company | Percussion drill assembly |
IT1320289B1 (en) | 2000-03-29 | 2003-11-26 | Campagnolo Srl | SYSTEM FOR THE TRANSFER OF DATA, FOR EXAMPLE FOR QUALIFYING CYCLES FOR COMPETITION. |
WO2023198568A1 (en) * | 2022-04-13 | 2023-10-19 | Sandvik Mining And Construction Oy | Protective sleeve for percussive drilling assembly |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1509142A (en) * | 1966-11-30 | 1968-01-12 | Forges Et Acieries Du Saut Dut | Pneumatic drilling hammer equipped with a cutting edge |
US3503459A (en) * | 1968-07-29 | 1970-03-31 | Mission Mfg Co | Percussion drill motor |
DE1950508C3 (en) * | 1969-10-07 | 1975-01-09 | Fma Pokorny Frankfurter Maschinenbau Ag, 6000 Frankfurt | Compressed air-operated deep-hole drills |
US4030554A (en) * | 1975-07-07 | 1977-06-21 | Bakerdrill, Inc. | Bore hole airhammer and anvil bit |
US4084647A (en) * | 1976-07-01 | 1978-04-18 | William Lister | Pneumatic percussion hammer |
US4098352A (en) * | 1976-12-17 | 1978-07-04 | Kennametal Inc. | Percussion bit with bypass channel therein |
US4163478A (en) * | 1978-09-15 | 1979-08-07 | Adcock Gerald L | Self aligning impact rock drilling tool |
EP0040026A1 (en) * | 1980-05-09 | 1981-11-18 | Halifax Tool Company Limited | Free piston machines |
-
1982
- 1982-08-06 EP EP82304174A patent/EP0081897B1/en not_active Expired
- 1982-08-06 DE DE8282304174T patent/DE3270411D1/en not_active Expired
- 1982-08-06 AT AT82304174T patent/ATE19130T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE3270411D1 (en) | 1986-05-15 |
EP0081897B1 (en) | 1986-04-09 |
EP0081897A1 (en) | 1983-06-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
UEP | Publication of translation of european patent specification | ||
REN | Ceased due to non-payment of the annual fee |