WO1994004303A1 - Tieflochbohrer - Google Patents
Tieflochbohrer Download PDFInfo
- Publication number
- WO1994004303A1 WO1994004303A1 PCT/CH1993/000194 CH9300194W WO9404303A1 WO 1994004303 A1 WO1994004303 A1 WO 1994004303A1 CH 9300194 W CH9300194 W CH 9300194W WO 9404303 A1 WO9404303 A1 WO 9404303A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- drill
- deep hole
- drilling
- hollow shaft
- cutting
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
- B23B51/042—Drills for trepanning with lubricating or cooling equipment
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S408/00—Cutting by use of rotating axially moving tool
- Y10S408/705—Drilling deep holes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/03—Processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/44—Cutting by use of rotating axially moving tool with means to apply transient, fluent medium to work or product
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/50—Cutting by use of rotating axially moving tool with product handling or receiving means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/895—Having axial, core-receiving central portion
Definitions
- the present invention relates to a method for producing deep boreholes, in particular in wood and similarly structured materials, as well as a deep hole drill suitable for this purpose and a deep hole drilling machine serving to carry out the method.
- the task at times is to drill deep holes in a workpiece. It is particularly important to ensure that the drill does not run in the borehole and thus does not lose the desired direction. When working with wood, the risk of the drill running out is greatly increased by the structure formed by the tree rings.
- intermittent retrieval is used, the drill being automatically returned from the borehole at constant time intervals and thus transporting the chips out with it.
- Conventional twist drills are used as drills.
- This method has several disadvantages.
- the drilling process is interrupted several times, which on the one hand results in a loss of time and on the other hand affects the uniformity of the drilling.
- From GB-A-1'415 1 137 a deep hole drill is known, the cutting elements of which are located on a pipe.
- a second pipe is located centrally in the first and is connected to it in a rotationally fixed manner.
- a hole saw device which consists of • a guide drill and a hole saw.
- the guide drill is a twist drill on which the hole saw is held in a rotationally fixed manner as a crown drill.
- the guide drill is in front of the hole saw. This device is not suitable for woodworking. If the guide drill runs along a tree ring, this can cause the drill to run.
- Figure 1 is a schematic representation of the deep hole drilling machine with deep hole drill from the side;
- Figure 2 shows a longitudinal section through the deep hole drill;
- FIG. 3 shows a cross section through the rear part of the deep hole drill
- FIG. 4 shows a cross section through the front part of the deep hole drill
- Figure 5 is a perspective view of a preferred embodiment of the core drill
- Figure 6 is an illustration of the same core drill from above
- Figure 7 is an illustration of the core drill of Figure 5 from the side.
- the deep hole drilling machine for drilling deep holes essentially consists, as can be seen in FIG. 1, of a drilling device A, a feed device B and a frame, which is not shown here.
- the devices A, B are fixed on the frame.
- the drilling device A performs the rotary movement of the drill and ensures that the chips are guided away by means of a compressed air supply, not shown.
- the feed device B generates the feed of the drilling device A and determines the depth of the bore.
- a feed motor 5 drives a transmission in the form of a closed chain 6 via a gear.
- a carrier element 4, which carries the drilling device A, is attached to this chain 6.
- the desired feed of the drilling device A can be achieved.
- the borehole depth can also be adjusted electronically or mechanically.
- the feed device B can be assembled from commercially available parts, and its structure can be chosen as desired. It can also be operated using compressed air.
- the drilling device A consists of a drive motor 1 and a deep hole drill 2.
- the drive motor 1 has a hollow shaft. It drives the deep hole drill 2.
- the deep hole drill 2 is composed of two concentrically arranged, long, one-part or multi-part hollow shafts which form the drilling elements.
- the outer diameter of the inner hollow shaft 22 corresponds to the inner diameter of the outer hollow shaft 21, as can be seen in FIG. 3.
- the outer hollow shaft 21 is fastened to the drive motor 1 with the usual fastening means and protrudes on its side facing the workpiece, hereinafter referred to as the drill side, by at least the length of the desired bore.
- the inner hollow shaft 22 passes through the hollow shaft of the drive motor 1, that is, it protrudes on both sides thereof, the drill side and the rear.
- the two hollow shafts 21, 22 are operated with different ratios: the outer hollow shaft 21 with a large gear ratio 11, the inner hollow shaft 22 with a small gear ratio 12.
- the inner hollow shaft 22 therefore has a higher speed than the outer hollow shaft 21. It differentiates generally by a factor of 90 on the speed of the outer hollow shaft.
- the deep hole drill 2 is displaceably mounted in a guide element 3 near the workpiece W. This can be attached, for example, to the frame of the drilling machine, not shown here.
- the guide element 3 ensures the stability of the deep hole drill 2 especially at the beginning of the drilling and guides it throughout the entire machining time.
- the outer hollow shaft 21 in the vicinity of the drive motor 1 on the drill side has openings 21 ′′ distributed uniformly over its circumference in a defined area, as can be seen in FIG.
- a compressed air unit 23 is located above this area.
- the inner hollow shank 22 has longitudinal grooves 222 distributed symmetrically on its circumference, which extend from the same area to the end of the hollow shank on the drill side. These longitudinal grooves 222 are created by grinding the jacket of the inner hollow shaft 22. In the area thus created between the two hollow shafts there are symmetrically distributed feed channels 24, as shown in FIG. 4.
- the ends of both hollow shanks on the drill side are provided with cutting elements.
- the outer hollow shaft has a drill bit 21 '
- the inner hollow shaft has a core drill 22'.
- the core drill 22 'of the inner hollow shaft 22 is set back or aligned with the drill bit 21' of the outer hollow shaft 21. In no case does it protrude above the drill bit 21 '. It is thereby achieved that the inner drilling element runs after the outer drilling element.
- the outer and the inner hollow shaft are both preferably made in several parts.
- the drill bit 21 'and the core drill 22' are formed on individual, short hollow cylinders which are placed on the long parts of the hollow shafts 21, 22.
- the actual cutting edges, preferably made of hard metal, are welded or soldered onto these drill heads formed in this way.
- this hard metal cutting edge is a toothed ring, in the case of the core bit it is a special cutting plate.
- the cutting edges can be reground without having to dismantle the entire hollow shank.
- a preferred embodiment of the core drill 22 ' is described below.
- a special core drill 22 ' is used so that the deep hole drill does not run even in woods with strongly pronounced annual rings or in areas with knots. If one chooses a core drill shaped to a point, there is the danger that it will follow distinctive tree rings in the wood and the deep hole drill will run despite the guidance of the drill bit.
- the core drill 22 'according to the invention therefore has no tip, but a cutting edge arranged perpendicular to the longitudinal direction. It is shown in Figures 5, 6 and 7.
- the core drill 22 ' consists of a short hollow cylinder forming the drill head, which has an internal thread at one end. So that it can be screwed onto the corresponding external thread of the inner hollow shaft 22.
- the cutting elements At the other end are the cutting elements, the cutting edges of which are shown in the figures with thin lines.
- As a Ordered cutting elements serve two peripheral shoulder parts 223, which are arranged diametrically to one another and run towards the edges 221 of the hollow cylinder in cutting edges. Rotated by 90 ° to the connecting diagonal of the shoulder parts 223, a cutting edge 224 in the form of a plate bridges the hollow cylinder diagonally. The cutting edge 224 projects beyond the peripheral shoulder parts 223 and serves as an essential machining element.
- main cutting edges 224 ' which are arranged centrosymmetrically about the drill axis and whose cutting edges are parallel to the diagonals.
- the cutting edge of the one main cutting edge 224 'thus lies on one side of the diagonal, the cutting edge of the other main cutting edge on the other side.
- Both main cutting edges 224 ' have the same but opposite angle of inclination with respect to the drill axis. Since the cutting edges are approximately perpendicular to the drill axis, the main cutting edges 224 'work like a face milling machine. In the area of the drill axis, the main cutting edges 224 'merge into a secondary cutting edge 224''along their inclination. These are also centrosymmetrical to the drill axis and form an acute angle with the cutting edges in the incline plane.
- the two approaches of the cutting edge 224 on the hollow cylinder are tapered in relation to the upper area of the cutting edge 224.
- the hollow cylinder has four longitudinal grooves 222 'distributed symmetrically on the outer surface of the outer shell, which extend over the entire length of the hollow cylinder.
- the other two longitudinal grooves 222' are offset by 90 ° as far as the area of the shoulder of the cutting edge. In this area, the two longitudinal grooves 222 'branch out in a V-shape and each end on one side of the shoulder.
- the longitudinal grooves 222 'used for the air supply must be aligned with those of the multi-part extension parts of the hollow shaft 22 which adjoin the drill head.
- Compressed air is supplied from the outside through the compressed air supply unit 23. It flows through the feed channels 24 between the two hollow shafts 21, 22 into the drill-side end of the deep hole drill 2 into the bore. It cools both hollow shafts with the integrated or attached cutting elements. At the same time, the inner hollow shaft 22 by the. Air cushion stored. The core of the inner hollow shaft 22 serves as the discharge channel 25. The air escapes through this discharge channel 25 and at the same time, as the cooling and transport medium, leads the removed material of the workpiece away from the drilling point. The chips are blown out of the inner hollow shaft 21 on the rear side of the drive motor. The special shape of the core drill 22 'optimizes the air distribution at the drilling point.
- the longitudinal grooves 222 'on the peripheral shoulder parts 223 guide the air into the vicinity of the drill bit 21' of the outer hollow shaft 21 so that the material removed there is captured. Detect the branched longitudinal grooves 222 'at the tips of the cutting edge 224 especially the chips generated by the cutting edge 224 and the peripheral shoulder parts 223.
- the flow is ensured in the removal of the chips.
- the chips are comminuted by the core drill 22 'to dimensions which are very much smaller than the diameter of the discharge channel 25.
- clumping of the fine chips, or sawdust is prevented by the fact that the rapid rotation and the arrangement of the longitudinal grooves 222 'of the core drill 22' produce air vortices on which the chips are carried as individual parts.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Drilling Tools (AREA)
- Materials For Medical Uses (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/211,805 US5451126A (en) | 1992-08-17 | 1993-08-03 | Deep boring drill |
EP93915624A EP0617649B1 (de) | 1992-08-17 | 1993-08-03 | Tieflochbohrer |
DE59303074T DE59303074D1 (de) | 1992-08-17 | 1993-08-03 | Tieflochbohrer |
FI941742A FI941742A0 (fi) | 1992-08-17 | 1994-04-15 | Syväpora |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2561/92-5 | 1992-08-17 | ||
CH256192 | 1992-08-17 | ||
CH367792 | 1992-12-01 | ||
CH3677/92-7 | 1992-12-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994004303A1 true WO1994004303A1 (de) | 1994-03-03 |
Family
ID=25690775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH1993/000194 WO1994004303A1 (de) | 1992-08-17 | 1993-08-03 | Tieflochbohrer |
Country Status (7)
Country | Link |
---|---|
US (1) | US5451126A (de) |
EP (1) | EP0617649B1 (de) |
AT (1) | ATE139719T1 (de) |
CA (1) | CA2121576A1 (de) |
DE (1) | DE59303074D1 (de) |
FI (1) | FI941742A0 (de) |
WO (1) | WO1994004303A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014193785A1 (en) * | 2013-05-28 | 2014-12-04 | Allied Machine & Engineering Corp. | Vacuum drilling system and methods |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4430331A1 (de) * | 1994-08-28 | 1996-02-29 | Schwaebische Huettenwerke Gmbh | Verfahren und Vorrichtung zur Beeinflussung des Verlaufs von Tieflochbohrungen |
DE19648868A1 (de) * | 1996-11-26 | 1998-05-28 | Hilti Ag | Bohrwerkzeug mit hohlzylinderförmigem Trägerkörper |
CN1079308C (zh) * | 1999-03-24 | 2002-02-20 | 叶小宁 | 超长精密深孔的加工方法及工艺设备 |
DE10222040A1 (de) * | 2002-05-17 | 2003-12-04 | Kennametal Inc | Fräswerkzeug |
WO2004078389A2 (en) * | 2003-02-28 | 2004-09-16 | Davis John D | I-joist hole cutting apparatus |
US20050105980A1 (en) * | 2003-02-28 | 2005-05-19 | Davis John D. | I-joist hole cutting apparatus |
SE526387C2 (sv) * | 2003-05-08 | 2005-09-06 | Seco Tools Ab | Borr för spånavskiljande bearbetning med alla delar utförda i ett material samt med innesluten spolkanal |
US7563060B2 (en) * | 2005-10-13 | 2009-07-21 | The Boeing Company | Vacuum drilling system |
US20090031871A1 (en) * | 2006-06-08 | 2009-02-05 | Malandain Hugues F | Dual cutting element tool for debulking bone |
US8556550B2 (en) * | 2007-06-29 | 2013-10-15 | Allied Machine & Engineering Corp. | Ejector drill system |
US20090136309A1 (en) * | 2007-11-28 | 2009-05-28 | Coulston George W | Apparatus and method for chip evacuation |
US7950883B2 (en) * | 2008-02-04 | 2011-05-31 | Yuehting Chen | Compact engraving machine |
US20100030216A1 (en) * | 2008-07-30 | 2010-02-04 | Arcenio Gregory B | Discectomy tool having counter-rotating nucleus disruptors |
US8286731B2 (en) * | 2008-10-22 | 2012-10-16 | Ressi Di Cervia Arturo L | Method and apparatus for constructing deep vertical boreholes and underground cut-off walls |
GB201014811D0 (en) * | 2010-09-07 | 2010-10-20 | Enviroform Solutions Ltd | Tool |
US9346111B2 (en) * | 2013-07-26 | 2016-05-24 | E.R. Shaw Inc. | Machine to manufacture gun barrels and method of using |
DE102013110129A1 (de) * | 2013-09-13 | 2015-03-19 | Jakob Lach Gmbh & Co. Kg | Werkzeuganordnung zur Herstellung von Bohrlöchern in Werkstoffen wie Faserverbundwerkstoffen |
US10040155B2 (en) * | 2016-01-19 | 2018-08-07 | The Boeing Company | Air cooled spindle exhaust air redirection system for enhanced machining byproduct recovery |
US10442011B1 (en) | 2017-11-20 | 2019-10-15 | Me3, Inc | Modular flywheel holesaw system |
USD851145S1 (en) | 2017-11-20 | 2019-06-11 | John D. Davis | Modular flywheel holesaw |
CN112372024A (zh) * | 2020-08-27 | 2021-02-19 | 沈阳富创精密设备股份有限公司 | 一种内冷钻头加工超过30倍径长度深孔的加工方法 |
CN117139684B (zh) * | 2023-10-30 | 2023-12-29 | 成都天科航空制造股份有限公司 | 一种用于机翼部件上的铰链钻孔装置及钻孔方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE375970C (de) * | 1923-05-22 | Bergbau Ind Und Bahnbau Ges | Verfahren zur Herstellung von Holzrohren aus einem Holzstamme | |
GB294457A (en) * | 1928-03-12 | 1928-07-26 | Herrmann Kleinholz | Improvements in and relating to machines for cutting concentric tubes from a tree trunk |
GB738048A (en) * | 1953-05-06 | 1955-10-05 | Franz Brenner Maschinen Und We | Improvements in tools for drilling holes in walls or the like |
US3584534A (en) * | 1969-04-11 | 1971-06-15 | Everett D Hougen | Device for driving a hole cutter |
US4339857A (en) * | 1980-08-11 | 1982-07-20 | Dickinson Lawrence C | Integrated cylinder finishing system |
DE3529603A1 (de) * | 1985-08-19 | 1987-03-05 | Will E C H Gmbh & Co | Bohrwerkzeug fuer lagen von papier oder dergleichen |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US106077A (en) * | 1870-08-02 | Improvement in pipe-boring machine | ||
US1352825A (en) * | 1916-12-19 | 1920-09-14 | R H White | Boring-tool |
US1940220A (en) * | 1931-02-06 | 1933-12-19 | Finkl & Sons Co | Boring tool |
GB1415137A (en) * | 1974-05-14 | 1975-11-26 | Blanson Precision Cutting Tool | Deep hole drill |
US3976387A (en) * | 1975-06-02 | 1976-08-24 | Segal F | Hole saw drill and arbor assembly |
US4204783A (en) * | 1979-03-01 | 1980-05-27 | Hougen Everett D | Machine for cutting holes with annular cutters |
US4306570A (en) * | 1980-08-20 | 1981-12-22 | Matthews Larry S | Counter rotating biopsy needle |
US4362444A (en) * | 1980-10-10 | 1982-12-07 | Watkins John A | Peck drill |
AU567784B2 (en) * | 1983-12-15 | 1987-12-03 | William James McGuire | Dowell making machine |
DE3424630C2 (de) * | 1984-07-04 | 1986-06-19 | Oerlikon-Boehringer GmbH, 7320 Göppingen | Vorschubeinrichtung zum Tiefbohren |
SU1214448A1 (ru) * | 1984-09-27 | 1986-02-28 | Предприятие П/Я Ж-1287 | Инструмент дл обработки волокнистых композиционных материалов |
DE69007241T2 (de) * | 1989-11-25 | 1994-06-23 | Omi Kogyo Kk | Hohlbohrer. |
-
1993
- 1993-08-03 DE DE59303074T patent/DE59303074D1/de not_active Expired - Fee Related
- 1993-08-03 CA CA002121576A patent/CA2121576A1/en not_active Abandoned
- 1993-08-03 AT AT93915624T patent/ATE139719T1/de not_active IP Right Cessation
- 1993-08-03 US US08/211,805 patent/US5451126A/en not_active Expired - Fee Related
- 1993-08-03 EP EP93915624A patent/EP0617649B1/de not_active Expired - Lifetime
- 1993-08-03 WO PCT/CH1993/000194 patent/WO1994004303A1/de active IP Right Grant
-
1994
- 1994-04-15 FI FI941742A patent/FI941742A0/fi not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE375970C (de) * | 1923-05-22 | Bergbau Ind Und Bahnbau Ges | Verfahren zur Herstellung von Holzrohren aus einem Holzstamme | |
GB294457A (en) * | 1928-03-12 | 1928-07-26 | Herrmann Kleinholz | Improvements in and relating to machines for cutting concentric tubes from a tree trunk |
GB738048A (en) * | 1953-05-06 | 1955-10-05 | Franz Brenner Maschinen Und We | Improvements in tools for drilling holes in walls or the like |
US3584534A (en) * | 1969-04-11 | 1971-06-15 | Everett D Hougen | Device for driving a hole cutter |
US4339857A (en) * | 1980-08-11 | 1982-07-20 | Dickinson Lawrence C | Integrated cylinder finishing system |
DE3529603A1 (de) * | 1985-08-19 | 1987-03-05 | Will E C H Gmbh & Co | Bohrwerkzeug fuer lagen von papier oder dergleichen |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014193785A1 (en) * | 2013-05-28 | 2014-12-04 | Allied Machine & Engineering Corp. | Vacuum drilling system and methods |
EP3004517A4 (de) * | 2013-05-28 | 2017-02-15 | Allied Machine & Engineering Corp. | Vakuumbohrsystem und -verfahren |
US9573201B2 (en) | 2013-05-28 | 2017-02-21 | Allied Machine & Engineering Corp. | Vacuum drilling system and methods |
US10005138B2 (en) | 2013-05-28 | 2018-06-26 | Allied Machine & Engineering Corp. | Vacuum drilling system and methods |
Also Published As
Publication number | Publication date |
---|---|
FI941742A (fi) | 1994-04-15 |
FI941742A0 (fi) | 1994-04-15 |
EP0617649B1 (de) | 1996-06-26 |
EP0617649A1 (de) | 1994-10-05 |
DE59303074D1 (de) | 1996-08-01 |
ATE139719T1 (de) | 1996-07-15 |
CA2121576A1 (en) | 1994-03-03 |
US5451126A (en) | 1995-09-19 |
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