CA2714983A1 - Drilling unit, method for slot drilling and slotting device - Google Patents
Drilling unit, method for slot drilling and slotting device Download PDFInfo
- Publication number
- CA2714983A1 CA2714983A1 CA2714983A CA2714983A CA2714983A1 CA 2714983 A1 CA2714983 A1 CA 2714983A1 CA 2714983 A CA2714983 A CA 2714983A CA 2714983 A CA2714983 A CA 2714983A CA 2714983 A1 CA2714983 A1 CA 2714983A1
- Authority
- CA
- Canada
- Prior art keywords
- tool
- axial
- fluid
- slotting device
- volume chamber
- 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.)
- Granted
Links
- 238000005553 drilling Methods 0.000 title claims abstract 38
- 238000000034 method Methods 0.000 title claims 9
- 239000012530 fluid Substances 0.000 claims abstract 29
- 239000011435 rock Substances 0.000 claims abstract 22
- 238000011010 flushing procedure Methods 0.000 claims abstract 12
- 238000009527 percussion Methods 0.000 claims abstract 8
- 230000005540 biological transmission Effects 0.000 claims abstract 3
- 239000000463 material Substances 0.000 claims abstract 2
- 230000008878 coupling Effects 0.000 claims 7
- 238000010168 coupling process Methods 0.000 claims 7
- 238000005859 coupling reaction Methods 0.000 claims 7
- 238000012544 monitoring process Methods 0.000 claims 2
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 claims 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
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/24—Guiding or centralising devices for drilling rods or pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/58—Machines slitting by drilling hole on hole
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
A slotting device (100) to be used with a rock drilling apparatus (1) to drill closely together a plurality of parallel intersecting holes so as to form a slot in a brittle material, such as rock, masonry or concrete. The slotting device (100) includes a guide portion (110) connected to a body portion (120) with at least one strut (130). The guide portion (110) is disposed in a previously drilled hole, and the body portion (120) and a rotary percussion tool (7) mutually define a variable volume chamber (140) that contains flushing fluid that damps transmission of impact stress waves from a percussion device (4) of the drilling apparatus (1) to the slotting device (100).
Claims (22)
1. A rock drilling unit for slot drilling, comprising a feed beam (3);
a rock drilling machine (6) arranged on the feed beam (3), and com-prising a percussion device (4) and a flushing device (11);
a tool (7) connected to the rock drilling machine (6);
and wherein the percussion device (4) is arranged to produce im-pact stress waves directed to the tool (7), and the flushing device (11) is ar-ranged to supply flushing fluid through the tool (7) for flushing drilling waste from a hole being drilled (52);
a feeding device (9), which is arranged to move the drilling machine (6) on the feed beam (3) and to feed the tool (7) in the hole being drilled (52);
and further a slotting device (100) connected to the rock drilling machine (6) and comprising a guide portion (110), a body portion (120) and at least one strut (130) extending between and coupling the guide portion (110) and body portion (120), and wherein the guide portion (110) is disposed in a previously drilled hole (50), and wherein the tool (7) is arranged slidingly through the body portion (120); characterized in that between the body portion (120) of the slotting device (100) and the tool (7) there is at lest one axial volume chamber (140) containing fluid so as to dampen transmission of the impact stress waves from the percussion device (4) to the slotting device (100).
a rock drilling machine (6) arranged on the feed beam (3), and com-prising a percussion device (4) and a flushing device (11);
a tool (7) connected to the rock drilling machine (6);
and wherein the percussion device (4) is arranged to produce im-pact stress waves directed to the tool (7), and the flushing device (11) is ar-ranged to supply flushing fluid through the tool (7) for flushing drilling waste from a hole being drilled (52);
a feeding device (9), which is arranged to move the drilling machine (6) on the feed beam (3) and to feed the tool (7) in the hole being drilled (52);
and further a slotting device (100) connected to the rock drilling machine (6) and comprising a guide portion (110), a body portion (120) and at least one strut (130) extending between and coupling the guide portion (110) and body portion (120), and wherein the guide portion (110) is disposed in a previously drilled hole (50), and wherein the tool (7) is arranged slidingly through the body portion (120); characterized in that between the body portion (120) of the slotting device (100) and the tool (7) there is at lest one axial volume chamber (140) containing fluid so as to dampen transmission of the impact stress waves from the percussion device (4) to the slotting device (100).
2. The rock drilling unit according to claim 1, characterized in that the axial volume chamber (140) is connected to the flushing device (11) by means of at least one flow channel; and the axial volume chamber (140) contains flushing fluid.
3. The rock drilling unit according to any one of claims 1 and 2, characterized in that the slotting device (100) is a dismountable auxiliary device con-nected to a shank (61) of the rock drilling machine (6) or to a drill rod (10) con-nected to the shank (61).
4. The rock drilling unit according to any one of the preceding claims, characterized in that the body portion (120) of the slotting device (100) and the tool (7) mutually define the at least one axial volume chamber (140) containing fluid.
5. The rock drilling unit according to claim 4, characterized in that the body portion (120) of the slotting device (100) comprises a sleeve (122) including a bore (124) through which the tool (7) extends;
the bore (124) of the sleeve (122) comprises a first diameter portion (124a), a second diameter portion (124b) smaller than the first diameter portion (124a), and a shoulder portion (124c) extending between and coupling the first diameter portion (124a) and second diameter portion (124b);
the first diameter portion (124a) of the bore (124) slidingly receives a piston portion (7a) of the tool (7), and the second diameter portion (124b) of the bore (124) receives a rod portion (7b) of the tool (7);
the axial volume chamber (140) comprises an annulus that is de-fined radially between the first diameter portion (124a) of the bore (124) and the rod portion (7b) of the tool (7), and is defined axially between the piston portion (7a) of the tool (7) and the shoulder portion (124c) of the bore (124);
the slotting device further comprises a flow passage (142) supplying the flushing fluid along the tool (7), the flow passage (142) comprises an axial flow passage (142a) disposed radially between the rod portion (7a) of the tool (7) and the second diameter portion (124b) of the bore (124), a first generally radial flow passage (142b) connecting a first internal passageway (144) of the tool (7) to a first axial end of the axial flow passage (142a), and a second gen-erally radial flow passage (142c) connecting a second internal passageway (146) of the tool (7) to a second axial end of the axial flow passage (1 42a);
the bore (124) of the sleeve (122) comprises a third diameter portion (124d) smaller than the second diameter portion (124b), the third diameter por-tion (124d) slidingly receives the rod portion (7b) of the tool (7); and relative axial displacement of the tool (7) with respect to the body portion (120) restricts fluid flow through the second generally radial flow pas-sage (142c) and increases fluid pressure moving the body portion (120) with respect to the tool (7).
the bore (124) of the sleeve (122) comprises a first diameter portion (124a), a second diameter portion (124b) smaller than the first diameter portion (124a), and a shoulder portion (124c) extending between and coupling the first diameter portion (124a) and second diameter portion (124b);
the first diameter portion (124a) of the bore (124) slidingly receives a piston portion (7a) of the tool (7), and the second diameter portion (124b) of the bore (124) receives a rod portion (7b) of the tool (7);
the axial volume chamber (140) comprises an annulus that is de-fined radially between the first diameter portion (124a) of the bore (124) and the rod portion (7b) of the tool (7), and is defined axially between the piston portion (7a) of the tool (7) and the shoulder portion (124c) of the bore (124);
the slotting device further comprises a flow passage (142) supplying the flushing fluid along the tool (7), the flow passage (142) comprises an axial flow passage (142a) disposed radially between the rod portion (7a) of the tool (7) and the second diameter portion (124b) of the bore (124), a first generally radial flow passage (142b) connecting a first internal passageway (144) of the tool (7) to a first axial end of the axial flow passage (142a), and a second gen-erally radial flow passage (142c) connecting a second internal passageway (146) of the tool (7) to a second axial end of the axial flow passage (1 42a);
the bore (124) of the sleeve (122) comprises a third diameter portion (124d) smaller than the second diameter portion (124b), the third diameter por-tion (124d) slidingly receives the rod portion (7b) of the tool (7); and relative axial displacement of the tool (7) with respect to the body portion (120) restricts fluid flow through the second generally radial flow pas-sage (142c) and increases fluid pressure moving the body portion (120) with respect to the tool (7).
6. The rock drilling unit according to any one of the claims 1 to 3, characterized in that between the tool (7) and the body portion (120) there is a dampen-ing piston (128), which is in axial connection to the body portion (120) and is in the axial direction separated by means of fluid from the tool (7).
7. The rock drilling unit according to claim 6, characterized in that the body portion (120) of the slotting device (100) comprises a sleeve (122) including a bore (124) through which the tool (7) extends;
the tool (7) comprises a flow passage (142) that extends through it;
the dampening piston (128) comprises an interior portion (128a) ar-ranged within the flow passage (142), an exterior portion (128b) around the tool (7) and at least one coupling portion (128c) coupling the interior portion and exterior portion together;
the piston (128) is arranged slidingly movably with respect to the tool (7);
the interior portion (128a) comprises a first working pressure surface (80) affecting towards the drilling direction (D) and a second working pressure surface (81) affecting towards the reverse direction (R);
a first axial volume chamber (140a) is on the first working pressure surface (80) side of the piston (128) and the fluid therein is transmitting the feed force from the tool (7) via the piston (128) to the sleeve (122); and a second axial volume chamber (140b) is on the second working pressure surface (81) side of the piston (128) and the fluid therein prevents mechanical axial contact between the tool (7) and the piston (128) in the drill-ing direction (D).
the tool (7) comprises a flow passage (142) that extends through it;
the dampening piston (128) comprises an interior portion (128a) ar-ranged within the flow passage (142), an exterior portion (128b) around the tool (7) and at least one coupling portion (128c) coupling the interior portion and exterior portion together;
the piston (128) is arranged slidingly movably with respect to the tool (7);
the interior portion (128a) comprises a first working pressure surface (80) affecting towards the drilling direction (D) and a second working pressure surface (81) affecting towards the reverse direction (R);
a first axial volume chamber (140a) is on the first working pressure surface (80) side of the piston (128) and the fluid therein is transmitting the feed force from the tool (7) via the piston (128) to the sleeve (122); and a second axial volume chamber (140b) is on the second working pressure surface (81) side of the piston (128) and the fluid therein prevents mechanical axial contact between the tool (7) and the piston (128) in the drill-ing direction (D).
8. The rock drilling unit according to claim 7, characterized in that the flow passage (142) of the tool (7) comprises at least one axial flow passage (142), which connects the axial volume chambers (140a, 140b);
and wherein an axial movement of the piston (128) relative to the tool (7) in the reverse direction (R) is arranged to restrict the pressure of the fluid affecting the first working pressure surface (80) thus increasing the feed force transmitted via the piston (128) to the sleeve (122).
and wherein an axial movement of the piston (128) relative to the tool (7) in the reverse direction (R) is arranged to restrict the pressure of the fluid affecting the first working pressure surface (80) thus increasing the feed force transmitted via the piston (128) to the sleeve (122).
9. The rock drilling unit according to any one of the preceding claims, characterized in that the guide portion (110) comprises at least one elongated guiding flange (112) extending longitudinally along a peripheral surface of the guide portion (110).
10. The rock drilling unit according to any one of the preceding claims, characterized in that the feed beam is provided with a hold device (64) at the distal end of the feed beam (3); and the hold device (64) comprises an opening (66), which is dimen-sioned according to a cross sectional profile of the slotting device (100) allow-ing the slotting device (100) to be pushed through the hold device (64).
11. A slotting device comprising:
an elongated tool (7) including a first end and a second end, and wherein the first end is provided with first coupling means (90) for attaching the slotting device (100) to a shank (61) of a drilling machine (6) or to a drill rod (10) connected to the shank (61), and wherein the second end is provided with a drill bit (8);
a body portion (120) through which the tool (7) is arranged;
a guide portion (110) disposable in a previously drilled hole (50);
and at least one strut (130) extending between and coupling the guide portion (110) and body portion (120); characterized in that the slotting device (100) is provided with at least one axial volume chamber (140) between the body portion (120) and the tool (7); and wherein the slotting device (100) comprises at least one flow chan-nel for directing fluid into the chamber (140), whereby the fluid in the chamber (140) is arranged to transmit axial forces from the tool (7) to the body portion (120).
an elongated tool (7) including a first end and a second end, and wherein the first end is provided with first coupling means (90) for attaching the slotting device (100) to a shank (61) of a drilling machine (6) or to a drill rod (10) connected to the shank (61), and wherein the second end is provided with a drill bit (8);
a body portion (120) through which the tool (7) is arranged;
a guide portion (110) disposable in a previously drilled hole (50);
and at least one strut (130) extending between and coupling the guide portion (110) and body portion (120); characterized in that the slotting device (100) is provided with at least one axial volume chamber (140) between the body portion (120) and the tool (7); and wherein the slotting device (100) comprises at least one flow chan-nel for directing fluid into the chamber (140), whereby the fluid in the chamber (140) is arranged to transmit axial forces from the tool (7) to the body portion (120).
12. The slotting device according to claim 11, characterized in that the slotting device (100) comprises at least one feed channel for feeding flushing fluid from the rock drilling machine into the axial volume chamber (140) and at least one discharge channel for discharging flushing fluid from the axial volume chamber (140) to the hole being drilled, whereby flushing fluid is arranged to flow through the axial volume chamber (140).
13. The slotting device according to claim 11 or 12, characterized in that the slotting device (100) comprises means for monitoring axial forces opposing the disposal of the guide portion (110) into the previously drilled hole (50);
and means for increasing pressure of the fluid affecting in drilling di-rection (D) on at least one working pressure surface (70, 80) of the at least one axial volume chamber (140, 140a) as a response to the monitored opposing forces, whereby axial force transmitted to the guide portion (110) is increased.
and means for increasing pressure of the fluid affecting in drilling di-rection (D) on at least one working pressure surface (70, 80) of the at least one axial volume chamber (140, 140a) as a response to the monitored opposing forces, whereby axial force transmitted to the guide portion (110) is increased.
14. The slotting device according to claim 12 and 13, characterized in that the slotting device (100) comprises valve means for affecting the volume flow through the axial volume chamber as a response to the relative axial position of the tool (7) and the body portion (120).
15. A method for slot drilling, comprising:
drilling closely together a plurality of holes (50 - 54) so as to form a slot (S) in a rock material (62);
using in drilling a rock drilling machine (6) comprising a percussion device (4) for generating percussion pulses to a tool (7) connected to a rock drilling machine (6);
connecting a slotting device (100) to the rock drilling machine (6), the slotting device (100) comprising: a body portion (120) through which the tool (7) is arranged; a guide portion (110); and at least one strut (130) extend-ing between and coupling the guide portion (110) and body portion (120);
disposing a guide portion (110) in a previously drilled hole (50) for maintaining the course of the previously drilled hole (50) for the new hole being drilled (52); and transmitting during drilling a feed force towards the drilling direction (D) from the tool (7) to the body portion (120) of the slotting device (100) and further to the guide portion (110); comprising transmitting the feed force to the body portion (120) of the slotting device in the drilling direction (D) by means of fluid in at least one axial volume chamber (140, 140a) between the tool (7) and the body portion (120); and dampening transmission of the impact stress waves from the per-cussion device (4) to the slotting device (100) by means of the fluid in the at least one axial volume chamber (140, 140a).
drilling closely together a plurality of holes (50 - 54) so as to form a slot (S) in a rock material (62);
using in drilling a rock drilling machine (6) comprising a percussion device (4) for generating percussion pulses to a tool (7) connected to a rock drilling machine (6);
connecting a slotting device (100) to the rock drilling machine (6), the slotting device (100) comprising: a body portion (120) through which the tool (7) is arranged; a guide portion (110); and at least one strut (130) extend-ing between and coupling the guide portion (110) and body portion (120);
disposing a guide portion (110) in a previously drilled hole (50) for maintaining the course of the previously drilled hole (50) for the new hole being drilled (52); and transmitting during drilling a feed force towards the drilling direction (D) from the tool (7) to the body portion (120) of the slotting device (100) and further to the guide portion (110); comprising transmitting the feed force to the body portion (120) of the slotting device in the drilling direction (D) by means of fluid in at least one axial volume chamber (140, 140a) between the tool (7) and the body portion (120); and dampening transmission of the impact stress waves from the per-cussion device (4) to the slotting device (100) by means of the fluid in the at least one axial volume chamber (140, 140a).
16. A method as claimed in claim 15, comprising influencing pressure of the fluid in the axial volume chamber (140, 140a) in response to the axial movement between the body portion (120) and the tool (7) arranged to slide longitudinally relative to each other.
17. A method as claimed in claim 16, comprising arranging fluid flow through the axial volume chamber (140, 140a);
and restricting the fluid flow through the axial volume chamber (140, 140a) when the movement of the guide portion (110) in the previously drilled hole (50) is hindered, whereby the feed force transmitted to the guide portion (110) is increased.
and restricting the fluid flow through the axial volume chamber (140, 140a) when the movement of the guide portion (110) in the previously drilled hole (50) is hindered, whereby the feed force transmitted to the guide portion (110) is increased.
18. A method as claimed in claim 17, comprising arranging fluid flow through the axial volume chamber (140, 140a);
closing the discharge fluid flow through the axial volume chamber (140, 140a) when the movement of the guide portion (110) in the previously drilled hole (50) is stopped, whereby the pressure of the fluid in the axial vol-ume chamber increases;
monitoring the pressure of the fluid affecting in the axial volume chamber; and reversing the feed movement of the rock drilling machine (6) when the pressure of the fluid in the axial volume chamber exceeds a predetermined pressure limit.
closing the discharge fluid flow through the axial volume chamber (140, 140a) when the movement of the guide portion (110) in the previously drilled hole (50) is stopped, whereby the pressure of the fluid in the axial vol-ume chamber increases;
monitoring the pressure of the fluid affecting in the axial volume chamber; and reversing the feed movement of the rock drilling machine (6) when the pressure of the fluid in the axial volume chamber exceeds a predetermined pressure limit.
19. A method as claimed in any of the previous claims 15 - 18, comprising connecting at least one drill rod (10) to a shank (61) of the drilling machine (6); and connecting the slotting device (100) to a distal end of an outermost drill rod (10).
20. A method as claimed in any of the previous claims 15 - 18, comprising connecting the slotting device (100) to a shank (61) of the drilling machine (6).
21. A method as claimed in any of the previous claims 15 - 20, comprising supporting the guide portion (110) to surfaces of the previously drilled hole (50) by means of at least one elongated guiding flange (112) ex-tending longitudinally along a peripheral surface of the guide portion (110).
22. A method as claimed in any of the previous claims 15 - 21, comprising conveying flushing fluid into the axial volume chamber (140, 140a).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FI2008/050161 WO2009122001A1 (en) | 2008-04-03 | 2008-04-03 | Drilling unit, method for slot drilling and slotting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2714983A1 true CA2714983A1 (en) | 2009-10-08 |
| CA2714983C CA2714983C (en) | 2012-08-28 |
Family
ID=41134872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2714983A Expired - Fee Related CA2714983C (en) | 2008-04-03 | 2008-04-03 | Drilling unit, method for slot drilling and slotting device |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US20110017513A1 (en) |
| EP (1) | EP2257687A1 (en) |
| JP (1) | JP5167404B2 (en) |
| CN (1) | CN101981269A (en) |
| AU (1) | AU2008353952B2 (en) |
| CA (1) | CA2714983C (en) |
| WO (1) | WO2009122001A1 (en) |
| ZA (1) | ZA201006643B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5679300B2 (en) * | 2011-01-07 | 2015-03-04 | 株式会社熊谷組 | Drilling device |
| KR101404683B1 (en) * | 2013-10-04 | 2014-06-09 | 주식회사 기술나라 | guide unit for free Surface and method for performing the free Surface in rock Splitting |
| US10062044B2 (en) * | 2014-04-12 | 2018-08-28 | Schlumberger Technology Corporation | Method and system for prioritizing and allocating well operating tasks |
| US9995137B2 (en) | 2014-09-15 | 2018-06-12 | Joy Global Underground Mining Llc | Service tool for cutting bit assembly |
| EP3006662B1 (en) * | 2014-10-09 | 2018-03-21 | Sandvik Mining and Construction Oy | Rotation unit, rock drilling unit and method for rock drilling |
| CN107448158B (en) * | 2016-05-31 | 2019-10-29 | 江苏银服智能装备有限公司 | One kind sending drill tools drilling fluid |
| JP6901284B2 (en) * | 2017-03-07 | 2021-07-14 | 鹿島建設株式会社 | Re-drilling method for concrete structures and jigs for re-drilling concrete structures |
| CN106703685B (en) * | 2017-03-17 | 2018-08-03 | 吉林大学 | A kind of high-voltage pulse power hammer drilling tool |
| CN109236215A (en) * | 2018-10-30 | 2019-01-18 | 西南石油大学 | A kind of drill rod stabilizing device suitable for laser engine broken rock experimental provision |
| CN111691828A (en) * | 2020-06-05 | 2020-09-22 | 芜湖青悠静谧环保科技有限公司 | Portable rock drilling puncher for mining |
| ES2954753T3 (en) * | 2020-12-07 | 2023-11-24 | Eurodrill Gmbh | Drilling drive device for a ground drilling rig |
| CN113464133A (en) * | 2021-07-22 | 2021-10-01 | 中国矿业大学(北京) | Top plate slitting device and method |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2461476A1 (en) * | 1974-12-24 | 1976-07-08 | Heller Geb | Drill guide for linked parallel holes - has second bore cut with aid of guide bar and bush to avoid wandering |
| JPS60133192A (en) * | 1983-12-21 | 1985-07-16 | 古河機械金属株式会社 | Reaction compensation mechanism of rock drilling machine |
| JP2761954B2 (en) * | 1989-02-27 | 1998-06-04 | 前田建設工業株式会社 | Drilling equipment for forming slots in rock |
| JP3479754B2 (en) * | 1995-04-20 | 2003-12-15 | 株式会社フジタ | Rock drilling equipment |
| FI2938U1 (en) * | 1997-03-21 | 1997-06-10 | Aulis Luukkanen | Arborrsledare |
| DE19732162A1 (en) * | 1997-07-25 | 1999-01-28 | Hoechst Ag | Cip card with bistable display |
| SE515810C2 (en) * | 1998-03-03 | 2001-10-15 | G Drill Ab | Slot drilling device with a submersible drill |
| CN2356137Y (en) * | 1998-11-13 | 1999-12-29 | 宣化-英格索兰矿山工程机械有限公司 | Drilling device for central hole enlarging sleeve follow-up down-the-hole hammer drill |
| FI118306B (en) * | 2001-12-07 | 2007-09-28 | Sandvik Tamrock Oy | Methods and devices for controlling the operation of a rock drilling device |
| JP2005282242A (en) * | 2004-03-30 | 2005-10-13 | Dowa Construction Co Ltd | Pre-slit jumbo |
| JP4615373B2 (en) * | 2005-05-26 | 2011-01-19 | 株式会社熊谷組 | Connecting member and punching device |
-
2008
- 2008-04-03 CN CN2008801283994A patent/CN101981269A/en active Pending
- 2008-04-03 JP JP2011502404A patent/JP5167404B2/en not_active Expired - Fee Related
- 2008-04-03 CA CA2714983A patent/CA2714983C/en not_active Expired - Fee Related
- 2008-04-03 WO PCT/FI2008/050161 patent/WO2009122001A1/en active Application Filing
- 2008-04-03 AU AU2008353952A patent/AU2008353952B2/en not_active Ceased
- 2008-04-03 EP EP08736810A patent/EP2257687A1/en not_active Withdrawn
- 2008-04-03 US US12/935,793 patent/US20110017513A1/en not_active Abandoned
-
2010
- 2010-09-16 ZA ZA2010/06643A patent/ZA201006643B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU2008353952A1 (en) | 2009-10-08 |
| EP2257687A1 (en) | 2010-12-08 |
| JP5167404B2 (en) | 2013-03-21 |
| JP2011516760A (en) | 2011-05-26 |
| WO2009122001A1 (en) | 2009-10-08 |
| CN101981269A (en) | 2011-02-23 |
| CA2714983C (en) | 2012-08-28 |
| US20110017513A1 (en) | 2011-01-27 |
| ZA201006643B (en) | 2011-06-29 |
| AU2008353952B2 (en) | 2011-11-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20150407 |