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WO2011035752A1 - Rotary feedthrough for granular materials - Google Patents

Rotary feedthrough for granular materials Download PDF

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Publication number
WO2011035752A1
WO2011035752A1 PCT/DE2010/000879 DE2010000879W WO2011035752A1 WO 2011035752 A1 WO2011035752 A1 WO 2011035752A1 DE 2010000879 W DE2010000879 W DE 2010000879W WO 2011035752 A1 WO2011035752 A1 WO 2011035752A1
Authority
WO
WIPO (PCT)
Prior art keywords
wall
chute
rotary feedthrough
tube
annular space
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.)
Ceased
Application number
PCT/DE2010/000879
Other languages
German (de)
French (fr)
Inventor
Eckardt Moeller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KNUTH WERKZEUGMASCHINEN GmbH
Original Assignee
KNUTH WERKZEUGMASCHINEN GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KNUTH WERKZEUGMASCHINEN GmbH filed Critical KNUTH WERKZEUGMASCHINEN GmbH
Publication of WO2011035752A1 publication Critical patent/WO2011035752A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/02—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other
    • B24C3/04—Abrasive blasting machines or devices; Plants characterised by the arrangement of the component assemblies with respect to each other stationary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0076—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier the blasting medium being a liquid stream

Definitions

  • the invention relates to a rotary feedthrough for granular materials, in particular for supplying an abrasive to the water jet of a water jet cutting machine.
  • the water jet is supplied with an abrasive, such as quartz sand, in order to increase the cutting performance.
  • an abrasive such as quartz sand
  • so-called 3D heads are used that allow bevel cuts.
  • an additional horizontal axis is provided with a suitable drive.
  • the power for the drive, the water and the abrasive in the lower portion of the 3D head must be performed. If the 3D head follows a predetermined cutting contour which requires its repeated rotation about its vertical axis in one direction, in the prior art in which the abrasive is supplied via a hose, the cutting process must be interrupted after two to three complete rotations have been achieved be because the supply line for the abrasive is then completely wound up.
  • the invention is thus based on the object to provide a rotary feedthrough for granular materials, in particular for supplying an abrasive to the water jet of a water jet cutting machine, in which the rotation of the 3D head in one direction without limitation is possible.
  • a rotary feedthrough which is provided with a stationary upper part and a rotatably mounted on this lower part, wherein the upper part and the lower part are each provided with a particular implementation of water permitting central recess,
  • the lower part is provided with an outer wall spaced from the wall of its recess defining a cylindrical annular space
  • the upper part is provided with a supply tube whose outlet is flush with the annular space
  • the lower part with at least one in the cylindrical or semi-cylindrical annular space between wall and outer wall helical or ramp which opens in a discharge tube and which guides the granular material supplied via the supply tube to the annular space and onto the discharge tube, via which the abrasive is supplied to the water jet.
  • the rotary feedthrough consists of a stationary upper part 10 and a rotatably mounted on this lower part 12, wherein the lower part 12 is mounted on the upper part 10 by a bearing 30.
  • the upper part 10 and the lower part 12 are each provided with a passage, in particular of water pipes but also of power cables permitting central recess 14, 16.
  • the lower part il259Xnrier provided by the wall 18 in its recess under the definition of a cylindrical annular space 20 spaced outer wall 22; the upper part 10 has a supply tube 24, the outlet of which is aligned with the annular space 20.
  • the supply tube 24 is suitable for coupling a hose (not shown) which receives the feeding abrasive.
  • the lower part 12 is provided with a helical in the cylindrical annulus 20 between the wall 18 and outer wall 22, that is in the manner of a helix, ramp-like and opening into a discharge tube 26 chute.
  • the chute 28 guides the granular material supplied from the supply tube 24 to the annulus 20 and gravitationally thereto to the discharge tube 26 through which the abrasive is supplied to the water jet (not shown).
  • the space under the chute may be filled to give a semicircular descriptive ramp terminating at the discharge tube 26 or a chute inserted between the inner wall 18 and the outer wall 22 into the respective semi-circular annulus may be secured.
  • a slide shape can be reproduced even by means of previously introduced and solidified abrasive, which - in the case of a structure consisting of two half-cylinders (hereinafter referred to as a two-shell) as in the drawing - from an arbitrary 180 ° angular position feed tube 24 into the Delivery tube 26 Abrasive promotes.
  • a second, the illustrated (half) shell symmetrically corresponding shell is provided, both are connected to each other via suitable means (not shown).
  • the second shell also has a chute, so that irrespective of the respective position of the delivery tube 24, the abrasive discharged from it into the lower part passes via one of the chutes 28 into the discharge tube 26.
  • the abrasive can make its intended removal on the chute, it is proposed to form the chute from the full material of a full piece under the chute forming a thick wall, so that the outer wall and inner wall are two surfaces of a thick wall below the chute and only above the chute, a symmetrical semicircular annulus 20 extending in a semicircle substantially resembling the ramp shape of the chute is formed.
  • Another training - not shown - uses only a slide over a larger, approximately 360 ° comprehensive angle. Also, training with three or more chutes 28 and multiple feed 24 and in the first place several Abmhxrschreibchen 26 (namely as many as slides) are conceivable and should be the subject of protection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

The invention relates to a rotary feedthrough for granular materials, in particular for feeding an abrasive to the water jet of a water-jet cutting system, comprising a stationary upper part (10) and a lower part (12) supported on the upper part such that the lower part can be rotated relative to the upper part, wherein the upper part (10) and the lower part (12) are each provided with a central cut-out (14, 16) that allows in particular water to be fed through, the lower part (12) is provided with an outer wall (22) arranged at a distance from the wall (18) of the cut-out (16) of the lower part so as to define a cylindrical annular space (20), the upper part (10) is provided with a feed tube (24), the outlet of which is aligned with the annular space (20), and the lower part (12) is provided with at least one chute (28), which extends helically in the cylindrical annular space (20) between the wall (18) and the outer wall (22) and opens into a discharge tube (26), wherein said chute conducts the granular material, which is fed to the annular space (20) by means of the feed tube (24) and strikes the chute, to the discharge tube (26), by means of which the abrasive is fed to the water jet.

Description

Drehdurchmhrung für körnige Werkstoffe  Rotary penetration for granular materials

Die Erfindung betrifft eine Drehdurchführung für körnige Werkstoffe, insbesondere zum Zuführen eines Abrasivs zu dem Wasserstrahl einer Wasserstrahlschneidanlage. The invention relates to a rotary feedthrough for granular materials, in particular for supplying an abrasive to the water jet of a water jet cutting machine.

Bei Wasserstrahlschneidanlagen wird dem Wasserstrahl ein Abrasiv, etwa Quarzsand zugeführt, um die Schneidleistung zu steigern. Bei Wasserstrahlschneidanlagen finden sogenannte 3D-Köpfe Anwendung, die Fasenschnitte erlauben. Um die Düse in dem Schneidwinkel anzustellen, ist eine zusätzliche horizontale Achse mit einem geeigneten Antrieb vorgesehen. In waterjet cutting systems, the water jet is supplied with an abrasive, such as quartz sand, in order to increase the cutting performance. In the case of water jet cutting machines, so-called 3D heads are used that allow bevel cuts. To set the nozzle in the cutting angle, an additional horizontal axis is provided with a suitable drive.

Es versteht sich, dass der Strom für den Antrieb, das Wasser und das Abrasiv in dem unteren Bereich des 3D-Kopfes geführt werden müssen. Folgt der 3D-Kopf einer vorgegebenen Schnittkontur, die seine mehrmalige Drehung um seine Hochachse in einer Richtung erforderlich macht, muss bei dem Stand der Technik, bei dem das Abrasiv über einen Schlauch zugeführt wird, der Schneidvorgang nach Erreichen von zwei bis drei vollständigen Drehungen unterbrochen werden, weil die Zuleitung für das Abrasiv dann vollständig aufgewickelt ist. It is understood that the power for the drive, the water and the abrasive in the lower portion of the 3D head must be performed. If the 3D head follows a predetermined cutting contour which requires its repeated rotation about its vertical axis in one direction, in the prior art in which the abrasive is supplied via a hose, the cutting process must be interrupted after two to three complete rotations have been achieved be because the supply line for the abrasive is then completely wound up.

Der Erfindung liegt damit die Aufgabe zugrunde, eine Drehdurchführung für körnige Werkstoffe, insbesondere zum Zuführen eines Abrasivs zu dem Wasserstrahl einer Wasserstrahlschneidanlage zu schaffen, bei der die Drehung des 3D-Kopfes in einer Richtung ohne Begrenzung möglich ist. The invention is thus based on the object to provide a rotary feedthrough for granular materials, in particular for supplying an abrasive to the water jet of a water jet cutting machine, in which the rotation of the 3D head in one direction without limitation is possible.

Erfindungsgemäß wird diese Aufgabe durch eine Drehdurchführung gelöst, die mit einem ortsfesten Oberteil und ein an diesem zu diesem verdrehbar gelagerten Unterteil versehen ist, wobei das Oberteil und das Unterteil jeweils mit einer die Durchführung insbesondere von Wasser erlaubenden zentralen Ausnehmung versehen sind, According to the invention this object is achieved by a rotary feedthrough, which is provided with a stationary upper part and a rotatably mounted on this lower part, wherein the upper part and the lower part are each provided with a particular implementation of water permitting central recess,

BESTÄTIGUNGSKOPIE das Unterteil mit einer von der Wandung seiner Ausnehmung unter Definition eines zylindrischen Ringraums beabstandeten Außenwandung versehen ist, das Oberteil mit einem Zufuhrröhrchen versehen ist, dessen Auslaß mit dem Ringraum fluchtet und das Unterteil mit einer wenigstens einer im zylindrischen oder halbzylindrischen Ringraum zwischen Wandung und Außenwandung helikal oder rampenförmig verlaufenden und in einem Abfuhrröhrchen mündenden Rutsche versehen ist, die den über das von dem Zufuhrröhrchen dem Ringraum zugeführten und auf sie auftreffen- den körnigen Werkstoff zu dem Abfuhrröhrchen führt, über das das Abrasiv dem Wasserstrahl zugeführt wird. CONFIRMATION COPY the lower part is provided with an outer wall spaced from the wall of its recess defining a cylindrical annular space, the upper part is provided with a supply tube whose outlet is flush with the annular space and the lower part with at least one in the cylindrical or semi-cylindrical annular space between wall and outer wall helical or ramp which opens in a discharge tube and which guides the granular material supplied via the supply tube to the annular space and onto the discharge tube, via which the abrasive is supplied to the water jet.

Die Erfindung wird im Folgenden anhand einer Zeichnung erläutert, die die eine Schale der - vorzugsweise zweischalig ausgebildeten - Drehführung in einer perspektivischen Darstellung wiedergibt. The invention is explained below with reference to a drawing, which reproduces a shell of the - preferably double-shelled - rotary guide in a perspective view.

Die Drehdurchführung besteht aus einem ortsfesten Oberteil 10 und einem an diesem zu diesem verdrehbar gelagerten Unterteil 12, wobei das Unterteil 12 an dem Oberteil 10 durch ein Lager 30 gelagert ist. The rotary feedthrough consists of a stationary upper part 10 and a rotatably mounted on this lower part 12, wherein the lower part 12 is mounted on the upper part 10 by a bearing 30.

Das Oberteil 10 und das Unterteil 12 sind jeweils mit einer die Durchführung insbesondere von Wasserleitungen aber auch von Stromkabeln erlaubenden zentralen Ausnehmung 14, 16 versehen. The upper part 10 and the lower part 12 are each provided with a passage, in particular of water pipes but also of power cables permitting central recess 14, 16.

Das Unterteil il259Xnrier von der Wandung 18 in seiner Ausnehmung unter Definition eines zylindrischen Ringraums 20 beabstandeten Außenwandung 22 versehen; das Oberteil 10 weist ein Zufuhrröhrchen 24 auf, dessen Auslaß mit dem Ringraum 20 fluchtet. Das Zufuhrröhrchen 24 ist zum Ankoppeln eines - nicht dargestellten - Schlauchs geeignet, der das zuführende Abrasiv aufnimmt. The lower part il259Xnrier provided by the wall 18 in its recess under the definition of a cylindrical annular space 20 spaced outer wall 22; the upper part 10 has a supply tube 24, the outlet of which is aligned with the annular space 20. The supply tube 24 is suitable for coupling a hose (not shown) which receives the feeding abrasive.

Das Unterteil 12 ist mit einer im zylindrischen Ringraum 20 zwischen Wandung 18 und Außenwandung 22 helikal, das heisst nach Art einer Helix, rampenartig verlaufenden und in einem Abfuhrröhrchen 26 mündenden Rutsche versehen. Die Rutsche 28 führt den über das von dem Zufuhrröhrchen 24 dem Ringraum 20 zugeführten und durch Schwerkraft auf diese auftreffenden körnigen Werkstoff zu dem Abfuhrröhrchen 26, über das das Abrasiv dem Wasserstrahl zugeführt wird (nicht gezeigt). Der Raum unter der Rutsche kann gefüllt sein, so dass sich eine einen Halbkreis beschreibende Rampe ergibt, die am Abfuhrröhrchen 26 endet, oder es kann eine in den jeweils nur halbkreisförmigen Ringraum eingebrachte Rutsche zwischen Innenwandung 18 und Außenwandung 22 befestigt sein. In einer einfachen Form kann sogar durch zuvor eingebrachtes und verfestigtes Abrasiv eine Rutschenform nachgebildet werden, die - bei einem aus zwei Halbzylindern bestehenden (im folgenden zwei- schalig bezeichneten) Aufbau wie in der Zeichnung - aus einer beliebigen 180° Winkelstellung stehenden Zuführröhrchen 24 in das Abfuhrröhrchen 26 Abrasiv fördert. The lower part 12 is provided with a helical in the cylindrical annulus 20 between the wall 18 and outer wall 22, that is in the manner of a helix, ramp-like and opening into a discharge tube 26 chute. The chute 28 guides the granular material supplied from the supply tube 24 to the annulus 20 and gravitationally thereto to the discharge tube 26 through which the abrasive is supplied to the water jet (not shown). The space under the chute may be filled to give a semicircular descriptive ramp terminating at the discharge tube 26 or a chute inserted between the inner wall 18 and the outer wall 22 into the respective semi-circular annulus may be secured. In a simple form, a slide shape can be reproduced even by means of previously introduced and solidified abrasive, which - in the case of a structure consisting of two half-cylinders (hereinafter referred to as a two-shell) as in the drawing - from an arbitrary 180 ° angular position feed tube 24 into the Delivery tube 26 Abrasive promotes.

Der restliche 180° Winkel wird dadurch abgedeckt, dass bei einer zweiten Hälfte des Unterteils (nicht dargestellt) eine zweite Rampe und ggf symmetrisch vorgesehen je einem weiteren Zuführröhrchen 24 und Abführröhrchen 26 bei beliebiger Verdrehung der gesamten Unterteils zum Oberteil immer eine Abrasivforderung in annähernd gerader Strecke möglich ist. The remaining 180 ° angle is covered by the fact that in a second half of the lower part (not shown), a second ramp and possibly symmetrically provided for each further supply tube 24 and Abführröhrchen 26 at any rotation of the entire lower part to the upper part always an abrasive requirement in approximately straight line is possible.

Bei diesem zweischaligen Aufbau ist eine zweites, der dargestellten (Halb-)Schale symmetrisch entsprechende Schale vorgesehen, beide sind über geeignete (nicht dargestellte) Mittel miteinander fest verbunden. Dabei weist natürlich auch die zweite Schale ebenso eine Rutsche auf, so dass unabhängig von der jeweiligen Position des Zuführröhrchens 24 das von diesem in das Unterteil abgeführte Abrasiv über eine der Rutschen 28 in das Abfuhrröhrchen 26 gelangt. In this bivalve structure, a second, the illustrated (half) shell symmetrically corresponding shell is provided, both are connected to each other via suitable means (not shown). Of course, the second shell also has a chute, so that irrespective of the respective position of the delivery tube 24, the abrasive discharged from it into the lower part passes via one of the chutes 28 into the discharge tube 26.

Da das Abrasiv auch auf der Rutsche seinen bestimmungsgemäßen Abtrag vornehmen kann, wird vorgeschlagen, die Rutsche aus dem vollen Material einer unter der Rutsche eine dicke Wand bildenden vollen Stücks auszubilden, so dass Außenwandung und Innenwandung zwei Flächen einer dicken Wand unterhalb der Rutsche sind und nur oberhalb der Rutsche sich ein im Halbkreis erstreckender im wesentlichen der Rampenform der Rutsche ähnelnder symmetrischer Halbkreis-Ringraum 20 entsteht. Since the abrasive can make its intended removal on the chute, it is proposed to form the chute from the full material of a full piece under the chute forming a thick wall, so that the outer wall and inner wall are two surfaces of a thick wall below the chute and only above the chute, a symmetrical semicircular annulus 20 extending in a semicircle substantially resembling the ramp shape of the chute is formed.

Eine andere Ausbildung - nicht dargestellt - nutzt nur eine Rutsche über einen größeren, annährend 360° umfassenden Winkel. Auch sind Ausbildungen mit drei oder mehr Rutschen 28 und mehreren Zufuhr- 24 und dazu in erster Linie mehreren Abmhxröhrchen 26 (nämlich so vielen wie Rutschen) denkbar und sollen Gegenstand des Schutzes sein. Another training - not shown - uses only a slide over a larger, approximately 360 ° comprehensive angle. Also, training with three or more chutes 28 and multiple feed 24 and in the first place several Abmhxröhrchen 26 (namely as many as slides) are conceivable and should be the subject of protection.

Claims

PATENTANSPRÜCHE 1. Drehdurchführung für körnige Werkstoffe, insbesondere zum Zuführen eines Abrasivs zu dem Wasserstrahl einer Wasserstrahlschneidanlage, gekennzeichnet durch ein ortsfestes Oberteil (10) und ein an diesem zu diesem verdrehbar gelagertes Unterteil (12), wobei das Oberteil (10) und das Unterteil (12) jeweils mit einer die Durchführung insbesondere von Wasser erlaubenden zentralen Ausnehmung (14, 16) versehen sind, das Unterteil (12) mit einer von der Wandung (18) seiner Ausnehmung (16) unter Definition eines zylindrischen Ringraums (20) beabstandeten Außenwandung (22) versehen ist, das Oberteil (10) mit einem Zufuhrröhrchen (24) versehen ist, dessen Auslass mit dem Ringraum (20) fluchtet, und das Unterteil (12) mit einer wenigstens einer im zylindrischen Ringraum (20) zwischen Wandung (18) und Außenwandung (22) helikal verlaufenden und in einem Abfuhrröhrchen (26) mündenden Rutsche (28) versehen ist, die den über das von dem Zufuhrröhrchen (24) dem Ringraum (20) zugeführten und auf sie auftreffenden körnigen Werkstoff zu dem Abfuhrröhrchen (26) führt, über das das Abrasiv dem Wasserstrahl zugeführt wird. 1. Rotary feedthrough for granular materials, in particular for supplying a Abrasivs to the water jet of a water jet cutting system, characterized by a stationary upper part (10) and a rotatably mounted on this lower part (12), wherein the upper part (10) and the lower part (12 ) are provided in each case with a central recess (14, 16) permitting the passage, in particular of water, of the lower part (12) with an outer wall (22) spaced from the wall (18) of its recess (16) defining a cylindrical annular space (20) ), the upper part (10) is provided with a supply tube (24) whose outlet is flush with the annulus (20) and the lower part (12) with at least one in the cylindrical annulus (20) between the wall (18) and Outside wall (22) helically extending and in a discharge tube (26) opening chute (28) is provided, which via the supply of the tube (24) to the annular space (20) supplied and granular material impinging on them leads to the discharge tube (26) via which the abrasive is supplied to the water jet. 2. Drehdurchführung nach Anspruch 1, gekennzeichnet durch einen zweischaligen Aufbau, wobei jede der beiden das Unterteil (12) bildenden Schalen mit einer Rutsche (28) versehen ist. 2. Rotary feedthrough according to claim 1, characterized by a bivalve structure, wherein each of the two lower part (12) forming shells with a chute (28) is provided. 3. Drehdurchführung nach Anspruch 1 oder 2, gekennzeichnet durch einen mehr- schaligen Aufbau, wobei jede der das Unterteil (12) bildenden Schalen mit einer Rutsche (28) und Abführröhrchen versehen ist, und das Oberteil wenigstens ein Zu- fuhrröhrchen (24) aufweist. 3. Rotary feedthrough according to claim 1 or 2, characterized by a multi-shell structure, each of the lower part (12) forming shells with a chute (28) and discharge tube is provided, and the upper part at least one feed tube (24) , 4. Drehdurchführung nach einem der vorangehenden Ansprüche, gekennzeichnet durch einen mehrschaligen Aufbau, wobei die Anzahl der Abführröhrchen (26) und die der im Oberteil vorgesehenen Zuführröhrchen (24) gleich ist. 4. Rotary feedthrough according to one of the preceding claims, characterized by a multi-shell construction, wherein the number of Abführröhrchen (26) and the provided in the upper part feed tube (24) is the same. 5. Drehdurchführung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Rutsche(n) (28) aus dem vollen Material einer unter der jeweiligen Rutsche ausgebildeten Wand voller Stärke ausgebildet sind, so dass Außenwandung und Innenwandung zwei Flächen der Wand unterhalb der Rutsche bilden und nur oberhalb der Rutsche sich ein im Halbkreis erstreckender im wesentlichen der Rampenform der Rutsche ähnelnder punkt-symmetrischer Halbkreis-Ringraum (20) verbleibt. 5. Rotary feedthrough according to one of the preceding claims, characterized in that the chute (s) (28) are formed from the full material of a formed under the respective slide wall full strength, so that outer wall and inner wall form two surfaces of the wall below the chute and only above the chute a point-symmetrical semicircular annulus (20) extending in a semicircle substantially resembling the ramp shape of the chute remains.
PCT/DE2010/000879 2009-09-28 2010-07-27 Rotary feedthrough for granular materials Ceased WO2011035752A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202009013061.4 2009-09-28
DE200920013061 DE202009013061U1 (en) 2009-09-28 2009-09-28 Rotary feedthrough for granular materials

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WO2011035752A1 true WO2011035752A1 (en) 2011-03-31

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WO (1) WO2011035752A1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004268168A (en) * 2003-03-06 2004-09-30 Jfe Engineering Kk Cutting equipment
WO2008128303A1 (en) * 2007-04-24 2008-10-30 Techni Waterjet Pty Ltd Improved water jet cutting machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004268168A (en) * 2003-03-06 2004-09-30 Jfe Engineering Kk Cutting equipment
WO2008128303A1 (en) * 2007-04-24 2008-10-30 Techni Waterjet Pty Ltd Improved water jet cutting machine

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