EP0427454B1 - Auger cleaner - Google Patents
Auger cleaner Download PDFInfo
- Publication number
- EP0427454B1 EP0427454B1 EP19900311949 EP90311949A EP0427454B1 EP 0427454 B1 EP0427454 B1 EP 0427454B1 EP 19900311949 EP19900311949 EP 19900311949 EP 90311949 A EP90311949 A EP 90311949A EP 0427454 B1 EP0427454 B1 EP 0427454B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- auger
- scraper blade
- flights
- scraper
- assembly according
- 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 - Lifetime
Links
- 230000010006 flight Effects 0.000 claims description 25
- 230000000717 retained effect Effects 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Images
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
- E21B12/00—Accessories for drilling tools
- E21B12/06—Mechanical cleaning devices
Definitions
- the present invention relates to an assembly of an auger cleaner and an auger disposed upon an auger rig according to the preamble of claim 1.
- Such an assembly is known from DE-C-3440002.
- the scraper described in that specification comprises a plate which may be swung from an inoperative to an operative position. In the operative position the plate extends between adjacent flights of the auger.
- the scraper is formed upon a body which is rotated about the axis of the auger thereby to force the spoil or debris adhering to the auger flights out of adhesion therewith, thereby to clean the flights on a progressive basis.
- the scraper blade extends generally perpendicular to the path of the auger flighting, power requirements for removing sticky clay, for example, from the auger flighting by means of the scraper can be high. Furthermore it is a regular occurrence that the flighting becomes deformed over a period of time. Generally the deformations on the auger flighting are such that the auger flighting plates are bent downwardly because of the drilling action in demanding conditions. Further, this deformation need not be regular, but can comprise irregular deformations as a result of the action of particular stones, blocks of concrete, etc.
- a static auger cleaner also provided with a scraper which can be rotated at will into or out of engagement with the auger flights.
- the static cleaner rests on two rollers which ride on the cleaned auger flights above the scraper, The cleaner is held in the vertical sense so that rotation of the auger also cleans the auger flight. The cleaner cannot be operated if the auger is stationary.
- the present invention is characterised in that the scraper blade has a helical configuration extending from its cutting edge, said helical configuration having an angle to its intended common axis of rotation relative to an auger, which angle is greater than the angle of attack of the flights of the auger thereby to displace debris and/or spoil by applying thereto a lifting force in the direction of the axis of the auger.
- the scraper blade is in permanent interengagement with the auger flights and is retained in its desired orientation between the flights of the auger by means of a roller riding on a portion of the auger flights superior to the cutting edge of the scraper blade.
- the roller may be of a readily replaceable type so that it may be replaced by a roller of a different diameter thereby to adjust the gap between the face of the auger flight and the adjacent cutting edge of the scraper blade. This arrangement allows the auger cleaner to move up and down the length of the auger at will.
- the scraper blade is preferably retained in an annular body which is a clearance fit about the auger flights, and wherein the annular body is operatively connected to the means for rotating the scraper about the axis of the auger.
- the annular body may be provided with a debris-discharging aperture adjacent the scraper blade.
- Means for rotating the scraper is preferably positioned above the said discharge aperture, and is preferably slidingly secured to a parallel rig member.
- a weir is provided at or toward the end of the scraper remote from the cutting edge, said weir acting to urge the debris and/or spoil away from the axis of the auger.
- the auger B is rotated by means of a drive thereby boring a hole in the soil which can then be filled with concrete, for example.
- the mast 12 extends parallel to the auger B in standard fashion.
- the auger cleaner A is supported for free sliding movement on the mast 12 by means of guides 6 which ride upon the mast 12 in the upward or downward direction.
- the guides 6 are generally elongate and support a support apron 11 which supports in turn a motor 7 which, in this instance, is a hydraulic motor but may be electric or powered by other means.
- This motor in turn drives a crown wheel interengaged with a pinion extending about the upper periphery of a rotary shell 4 of a generally annular configuration.
- the internal diameter of the shell 4 is a clearance fit over the auger flighting 3.
- actuation of the motor 7 rotates a crown wheel (not shown) which interengages a pinion (not shown) shrouded by pinion shroud 8.
- the pinion is accordingly driven in response to the crown wheel and thereby rotates the rotary shell 4. Since the motor 7 is reversible, the rotary shell 4 may be driven in either direction.
- a helical scraper 1 Located within the rotary shell 4 is a helical scraper 1 which generally conforms to the configuration of the auger flighting 3.
- the helical scraper 1, as is shown in Figure 3, extends over most of a single turn of the auger flighting and terminates at its cutting edge in a specially hardened steel portion 13 which provides initial contact between the helical scraper blade 1 and the spoil impacted upon the auger flighting 3.
- the upper surface of the helical scraper blade 1 passes by a generally rectangular discharge aperture 5 formed in the shell 4.
- Adjacent the end of the helical scraper blade 1 remote from the cutting tip is a weir 14 which is upstanding from the upper surface of the helical scraper blade adjacent the lateral edge of the discharge aperture 5.
- the weir 14 acts to urge the debris forced up the inclined plane of the helical scraper 1 out of the discharge aperture 5.
- the lower rim 10 of the rotary shell 4 is provided with an out-turned section adapted to assist in impelling the spoil and debris away from the auger in use.
- the internal face of the shell 4 remote from the aperture 5 and opposed thereto is provided with a suitably positioned roller which carries the shell, and hence the scraper blade integrally formed therewith, upon the auger flighting.
- a suitably positioned roller which carries the shell, and hence the scraper blade integrally formed therewith, upon the auger flighting.
- the auger cleaner A is controlled by means of the supply of hydraulic fluid to the motor 7 allowing it to be driven in either direction by the operator of the auger rig. Initially, the auger cleaner A is moved toward the top of the auger B and retained there during the drilling operation. Obviously, as the auger is wound down into the ground the auger cleaner A will descend with it, but this may be counteracted at intervals by operating the motor 7 to drive the auger cleaner upwards again. It is in any event occasionally necessary to stop the auger in order to interengage further sections of auger flights.
- the auger is withdrawn in the usual way. This may be done either by merely withdrawing the auger without rotation, or by gentle rotation in either the clockwise or anti-clockwise direction as seems appropriate to the operator in view of the stratum through which the hole is being bored. However the auger is withdrawn, it may be cleaned either as, or after, it has been withdrawn from the bore. In either condition, power is supplied to the motor 7 to drive the auger cleaner A in a downward direction thereby causing the helical scraper blade 1 to contact the impacted spoil on the auger flights 3 and discharge it either directed downwardly or via the discharge aperture 5.
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)
- Cleaning In General (AREA)
Description
- The present invention relates to an assembly of an auger cleaner and an auger disposed upon an auger rig according to the preamble of
claim 1. Such an assembly is known from DE-C-3440002. - When a hole is drilled in the ground using a continuous-flight auger, the soil is cut by the leading edge of the auger and transported upwards by the auger flighting which acts as an Archimedean screw conveyor. In sticky clay soils for example, this soil may be carried up to a height above the ground where it represents a serious danger to site personnel as it may become dislodged and fall and thereby cause injury or even death. Further, it is necessary to remove soil compacted on the auger flights from the auger before the auger can be used again.
- Traditionally, augers have been cleaned by hand using a hoe or shovel. This has been only partially satisfactory, and is in any event labour intensive.
- Various attempts have been made to mechanise the cleaning of augers which mostly involve providing means for inserting a scraper at will between adjacent flights of the auger thereby to dislodge the spoil adhering thereto. These devices require the auger to be rotating before they can operate since they have no means of motive power.
- Recently it has become necessary to provide means whereby a scraper be utilised to clean an auger independently of the rotation of the auger since it is necessary in modern civil engineering operations to be able to withdraw the auger from a bore that it has just drilled without necessarily rotating the auger.
- This problem has been addressed in GB-A-2 158130, which provides an auger cleaner comprising a scraper blade interposable between adjacent flights of an auger, motor means for rotating the scraper about the axis of the auger to remove debris retained between the flights, and control means to match the speed of axial movement of the auger with rotational movement of the cleaner.
- There is a number of problems however with this arrangement. The scraper described in that specification comprises a plate which may be swung from an inoperative to an operative position. In the operative position the plate extends between adjacent flights of the auger. The scraper is formed upon a body which is rotated about the axis of the auger thereby to force the spoil or debris adhering to the auger flights out of adhesion therewith, thereby to clean the flights on a progressive basis.
- In the first place, because the scraper blade extends generally perpendicular to the path of the auger flighting, power requirements for removing sticky clay, for example, from the auger flighting by means of the scraper can be high. Furthermore it is a regular occurrence that the flighting becomes deformed over a period of time. Generally the deformations on the auger flighting are such that the auger flighting plates are bent downwardly because of the drilling action in demanding conditions. Further, this deformation need not be regular, but can comprise irregular deformations as a result of the action of particular stones, blocks of concrete, etc. With the scraper arrangement in accordance with the above-identified disclosure, deformation of the auger flights almost inevitably causes the scraper to jam unless the scraper blade is made small enough to accommodate likely deformations; in which case, of course, the efficiency of cleaning is much reduced. This effect is exacerbated because the lateral edges of the scraper are intended to slide against the upper and lower faces of opposed portions of auger flighting so that the scraper will tend to jam if either of the flights are deformed.
- Further inefficiencies lie in the fact that each section of the auger is jointed to the other at the auger axis, Thus, a complete auger may be formed of a number of different sections, all co-axially arranged and interengaged by means of suitable male and female interengagements. This means that it is not possible for the scraper of the prior art to rest against the central axis of the auger in use since if it does, it would become periodically jammed against an annular flange forming part of the auger axis. Accordingly, it is necessary to shorten the scraper blade so as to be well clear of the auger axis and again this reduces the efficiency of operation.
- In SU-A-705099, there is described a static auger cleaner also provided with a scraper which can be rotated at will into or out of engagement with the auger flights. The static cleaner rests on two rollers which ride on the cleaned auger flights above the scraper, The cleaner is held in the vertical sense so that rotation of the auger also cleans the auger flight. The cleaner cannot be operated if the auger is stationary.
- In order to overcome or alleviate the foregoing problems, the present invention is characterised in that the scraper blade has a helical configuration extending from its cutting edge, said helical configuration having an angle to its intended common axis of rotation relative to an auger, which angle is greater than the angle of attack of the flights of the auger thereby to displace debris and/or spoil by applying thereto a lifting force in the direction of the axis of the auger.
- In a preferred form of the invention, the scraper blade is in permanent interengagement with the auger flights and is retained in its desired orientation between the flights of the auger by means of a roller riding on a portion of the auger flights superior to the cutting edge of the scraper blade. The roller may be of a readily replaceable type so that it may be replaced by a roller of a different diameter thereby to adjust the gap between the face of the auger flight and the adjacent cutting edge of the scraper blade. This arrangement allows the auger cleaner to move up and down the length of the auger at will.
- The scraper blade is preferably retained in an annular body which is a clearance fit about the auger flights, and wherein the annular body is operatively connected to the means for rotating the scraper about the axis of the auger. The annular body may be provided with a debris-discharging aperture adjacent the scraper blade. Means for rotating the scraper is preferably positioned above the said discharge aperture, and is preferably slidingly secured to a parallel rig member.
- In a preferred form of blade of this type, a weir is provided at or toward the end of the scraper remote from the cutting edge, said weir acting to urge the debris and/or spoil away from the axis of the auger.
- The invention will now be described, by way of illustration only, with reference to the accompanying drawings, wherein:
- Figure 1 shows a front elevation of an auger cleaner in accordance with the present invention positioned upon an auger,
- Figure 2 shows a side elevation of the auger cleaner of Figure 1 in a similar position, and
- Figure 3 shows a plan view from above of a blade according to the invention. In accordance with standard practice in the art, an auger B is provided with an
auger axis 9 about whichauger flighting 3 is disposed in a standard fashion. Theauger axis 9 is rotated by drive means (not shown) in standard fashion and is supported on anauger rig mast 12. - In accordance with standard practice in the art, the auger B is rotated by means of a drive thereby boring a hole in the soil which can then be filled with concrete, for example. The
mast 12 extends parallel to the auger B in standard fashion. - In accordance with the present invention, the auger cleaner A is supported for free sliding movement on the
mast 12 by means of guides 6 which ride upon themast 12 in the upward or downward direction. The guides 6 are generally elongate and support asupport apron 11 which supports in turn amotor 7 which, in this instance, is a hydraulic motor but may be electric or powered by other means. This motor in turn drives a crown wheel interengaged with a pinion extending about the upper periphery of arotary shell 4 of a generally annular configuration. The internal diameter of theshell 4 is a clearance fit over theauger flighting 3. It will be appreciated that actuation of themotor 7 rotates a crown wheel (not shown) which interengages a pinion (not shown) shrouded bypinion shroud 8. The pinion is accordingly driven in response to the crown wheel and thereby rotates therotary shell 4. Since themotor 7 is reversible, therotary shell 4 may be driven in either direction. - Located within the
rotary shell 4 is ahelical scraper 1 which generally conforms to the configuration of theauger flighting 3. Thehelical scraper 1, as is shown in Figure 3, extends over most of a single turn of the auger flighting and terminates at its cutting edge in a specially hardenedsteel portion 13 which provides initial contact between thehelical scraper blade 1 and the spoil impacted upon theauger flighting 3. The upper surface of thehelical scraper blade 1 passes by a generallyrectangular discharge aperture 5 formed in theshell 4. Adjacent the end of thehelical scraper blade 1 remote from the cutting tip is aweir 14 which is upstanding from the upper surface of the helical scraper blade adjacent the lateral edge of thedischarge aperture 5. Theweir 14 acts to urge the debris forced up the inclined plane of thehelical scraper 1 out of thedischarge aperture 5. Thelower rim 10 of therotary shell 4 is provided with an out-turned section adapted to assist in impelling the spoil and debris away from the auger in use. - The internal face of the
shell 4 remote from theaperture 5 and opposed thereto is provided with a suitably positioned roller which carries the shell, and hence the scraper blade integrally formed therewith, upon the auger flighting. It will be appreciated that the relative positions of the cutting edge of the scraper blade and the upper surface of the auger flighting can be adjusted by adjusting the external diameter of the roller so as to get the maximum cleaning as is commensurate with allowing for deformations of the auger flighting in use. By use of this roller rather than the previously utilised static edge to auger flighting interengagement, power requirements are kept to a minimum allowing the rotary shell and attendant scraper blade to be rapidly moved up and down the stationary auger flighting merely by utilisation of themotor 7. - In use, the auger cleaner A is controlled by means of the supply of hydraulic fluid to the
motor 7 allowing it to be driven in either direction by the operator of the auger rig. Initially, the auger cleaner A is moved toward the top of the auger B and retained there during the drilling operation. Obviously, as the auger is wound down into the ground the auger cleaner A will descend with it, but this may be counteracted at intervals by operating themotor 7 to drive the auger cleaner upwards again. It is in any event occasionally necessary to stop the auger in order to interengage further sections of auger flights. - At the end of the drilling operation, the auger is withdrawn in the usual way. This may be done either by merely withdrawing the auger without rotation, or by gentle rotation in either the clockwise or anti-clockwise direction as seems appropriate to the operator in view of the stratum through which the hole is being bored. However the auger is withdrawn, it may be cleaned either as, or after, it has been withdrawn from the bore. In either condition, power is supplied to the
motor 7 to drive the auger cleaner A in a downward direction thereby causing thehelical scraper blade 1 to contact the impacted spoil on theauger flights 3 and discharge it either directed downwardly or via thedischarge aperture 5. Deformations in the auger flighting do not cause jamming of the auger cleaner as in the prior art since the lifting motion of the helical scraper dislodges the spoil from the helical flights by a cutting displacement rather than by mere force. It will be appreciated that by means of the present invention the auger can be cleaned to its very tip by virtue of the interaction of theroller 2 with the auger flighting on the turn above the cutting edge.
Claims (7)
- An assembly of an auger cleaner (A) and an auger disposed upon an auger rig, said auger cleaner comprising a scraper blade (1) interposable between adjacent flights (3) of the auger, and means (7,8) for rotating the scraper blade about the axis (9) of the auger to remove debris retained between the flights; characterised in that the scraper blade has a helical configuration which has a greater angle of attack than the angle of the flights of the auger, thereby to displace debris and/or spoil by applying thereto a lifting force in the direction of the axis (9) of the auger.
- An assembly according to claim 1 characterised in that a weir (14) is provided at or toward the end of the scraper remote from the cutting edge, said weir acting in use to urge debris and/or spoil away from the axis of the auger.
- An assembly according to either of claims 1 or 2 characterised in that the scraper blade is operatively in permanent interengagement with the auger flights.
- An assembly according to any of claims 1 to 3 characterised in that the scraper blade (1) is retained in its desired orientation between the flights (3) of the auger by means of a roller (2) riding on a portion of the auger flights (3) superior to the cutting edge (13) of the scraper blade.
- An assembly according to claim 4 characterised in that the roller (2) is readily replaceable with a roller of a different diameter so as to adjust the gap between the auger flight (3) and the cutting edge (13) of the scraper blade.
- An assembly according to any preceding claim characterised in that the scraper blade (1) is retained in a annular body (4) which is a clearance fit about the auger (3), and wherein the body is driven by the means (7,8), to rotate the scraper (1).
- An assembly according to claim 6 characterised in that the annular body (4) is provided with a debris-discharging aperture (5) adjacent the scraper blade (1), and wherein means (7) for rotating the scraper (1) is positioned superior to the discharge aperture (5).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT90311949T ATE92584T1 (en) | 1989-11-10 | 1990-11-01 | CLEANER FOR AUGER DRILLS. |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB898925391A GB8925391D0 (en) | 1989-11-10 | 1989-11-10 | Auger cleaner |
GB8925391 | 1989-11-10 | ||
GB909001455A GB9001455D0 (en) | 1989-11-10 | 1990-01-22 | Auger cleaner |
GB9001455 | 1990-01-22 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0427454A2 EP0427454A2 (en) | 1991-05-15 |
EP0427454A3 EP0427454A3 (en) | 1991-10-16 |
EP0427454B1 true EP0427454B1 (en) | 1993-08-04 |
Family
ID=26296181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900311949 Expired - Lifetime EP0427454B1 (en) | 1989-11-10 | 1990-11-01 | Auger cleaner |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0427454B1 (en) |
DE (1) | DE69002583T2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012006306A1 (en) * | 2012-03-21 | 2013-09-26 | Liebherr-Werk Nenzing Gmbh | Cleaning apparatus used for cleaning auger of drilling excavator, has cleaning device that is set outside the thread portion of auger in original position and is extended up in thread portion of auger in cleaning position |
US10315856B2 (en) | 2017-08-24 | 2019-06-11 | Karl Schnell Gmbh & Co. Kg | Cleaning device and method for cleaning a screw conveyor |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2318135A (en) * | 1996-10-11 | 1998-04-15 | Mini Agriculture & Fisheries | Soil auger and mechanical soil sampler |
ITUD20020117A1 (en) * | 2002-05-30 | 2003-12-01 | Casagrande Spa | CLEANING DEVICE FOR PROPELLER TOOLS AND CLEANING PROCEDURE OF A PROPELLER TOOL ADOPTING SUCH DEVICE |
NL1033258C2 (en) * | 2007-01-19 | 2008-07-22 | Ecodrie B V | Device for cleaning an earth drill. |
FR3060048B1 (en) * | 2016-12-12 | 2020-12-11 | Soletanche Freyssinet | DRILLING MACHINE INCLUDING A AUGER AND A AUGER CLEANING DEVICE |
CN108457600A (en) * | 2018-05-10 | 2018-08-28 | 江苏地基工程有限公司 | Novel long spire drill bit of pile machine cuts earthenware |
DE102019109012A1 (en) * | 2019-04-05 | 2020-10-08 | Marcus Burg | Cleaning device |
CN110295852A (en) * | 2019-06-28 | 2019-10-01 | 中交天津港湾工程研究院有限公司 | A kind of drill bit soil body remove device and its application method |
CN112252993A (en) * | 2020-11-02 | 2021-01-22 | 王元 | Equipment for realizing soil drilling separation for ground drilling |
FR3127420B1 (en) * | 2021-09-28 | 2023-08-25 | Botte Fond | Cleaning device for a drilling tool |
CN115613965B (en) * | 2022-09-22 | 2023-05-26 | 乐山师范学院 | Equipment for petroleum drilling and operation method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1522276A (en) * | 1967-02-09 | 1968-04-26 | Sucmanu | Scraper device for helical conveyors |
US3782535A (en) * | 1972-06-15 | 1974-01-01 | T Yousch | Screw conveyor coil wiper |
SU705099A1 (en) * | 1977-09-12 | 1979-12-25 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Институт Нефтяного Машиностроения | Apparatus for cleaning conveyor screws |
FR2563861B1 (en) * | 1984-05-03 | 1986-08-29 | Soletanche | DEVICE FOR CLEANING AUGER BITS. |
DE3440002C1 (en) * | 1984-11-02 | 1986-04-10 | Telg GmbH, 4717 Nordkirchen | Drilling appliance for making relief bores on the surface |
DE3446902A1 (en) * | 1984-12-21 | 1986-07-03 | Karl Bauer Spezialtiefbau GmbH & Co KG, 8898 Schrobenhausen | Device for discharging cuttings from the auger of an auger drilling appliance for earth bores |
FR2609307B1 (en) * | 1987-01-07 | 1989-03-17 | Labrue Jean Marie | AUGER DRIVE DEVICE FOR DRILLING AND CONCRETING PILES IN THE GROUND AND METHOD FOR THEIR PRODUCTION |
-
1990
- 1990-11-01 EP EP19900311949 patent/EP0427454B1/en not_active Expired - Lifetime
- 1990-11-01 DE DE1990602583 patent/DE69002583T2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012006306A1 (en) * | 2012-03-21 | 2013-09-26 | Liebherr-Werk Nenzing Gmbh | Cleaning apparatus used for cleaning auger of drilling excavator, has cleaning device that is set outside the thread portion of auger in original position and is extended up in thread portion of auger in cleaning position |
US10315856B2 (en) | 2017-08-24 | 2019-06-11 | Karl Schnell Gmbh & Co. Kg | Cleaning device and method for cleaning a screw conveyor |
Also Published As
Publication number | Publication date |
---|---|
DE69002583D1 (en) | 1993-09-09 |
EP0427454A2 (en) | 1991-05-15 |
EP0427454A3 (en) | 1991-10-16 |
DE69002583T2 (en) | 1993-11-25 |
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