US3833175A - Mobile-platform-supported device for the application of a sprayable material to a surface - Google Patents

Mobile-platform-supported device for the application of a sprayable material to a surface Download PDF

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US3833175A
US3833175A US00334596A US33459673A US3833175A US 3833175 A US3833175 A US 3833175A US 00334596 A US00334596 A US 00334596A US 33459673 A US33459673 A US 33459673A US 3833175 A US3833175 A US 3833175A
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platform
swinging axis
swinging
arm
holder arm
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US00334596A
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E Pulk
C Hallsenius
J Noren
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Stabilator AB
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Stabilator AB
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04—Lining with building materials
    • E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete

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  • the present invention relates to a device supported by a mobile platform for the application of a sprayable material to a surface, for example sprayed concrete to a tunnel wall. It comprises a spray nozzle which is fitted to the free end of an extendable holder arm and it is mainly characterized in that the holder arm is pivoted at its lower end on a first swinging axis parallel to the direction of motion of the platform, the axis being situated at the free end of at least one intermediate arm, which in turn is pivoted on a second swinging axis parallel with the first swinging axis.
  • the present invention relates to a device supported by a mobile platform for the application of a sprayable material to a surface, and comprising a spray nozzle arranged at the free end of an extendable holder arm.
  • the purpose of the invention is to describe a new and improved device of the type mentioned initially, which would overcome the disadvantage mentioned above. A.
  • the device constructed in accordance with the invention which is chiefly characterized in that the holder arm pivots at its other end around a first swinging axis parallel with the direction of motion of the platform, the swinging axis being situated at the free end of at least one intermediate arm which in turn pivots around a second swinging axis parallel with the first swinging axis, has also proved in practical tests that it fulfils the purpose stated.
  • the arrangement according to the invention for the swinging support of the holder arm at the free end of a similarly pivoted intermediate arm en-.
  • the platform occurring in a device in accordance with the invention can be provided on the underside with a portal-like passage.
  • the second swinging axis that is, the axis on which the intermediate arm pivots, may be situated at one end of the platform, more precisely, its front end.
  • the actual spraying of the concrete can take place in front of the platform, which has the advantage that an operator standing on the platform will always be below a roof already coated with concrete and would therefore be protected from falls as well as no longer being exposed to splashing from the concrete spraying now taking place some dis tance ahead.
  • the manoeuvrability of the holder arm can be greatly improved by making it possible to move the second swinging axis longitudinally relative to the platform, so that the holder arm supporting the spraying nozzle cannot only be swung in its own plane but can also be moved back and forth relative to'the platform.
  • a hydraulic motor for the swinging movements of the holder arm and intermediate arrn is fitted at the swinging axis of the arm in question.
  • FIG. 1 shows a side view of a device according to the invention, erected in a tunnel, while FIG. 2 shows a front view of this device seen from the direction indicated by the line 22 in FIG. 1.
  • the device shown in the drawing is intended to follow a full-face tunnelling machine during tunnelling, in order to provide the emerging sections of the tunnel wall and roof with a coating or lining of sprayed concrete, as the tunnel is driven forward.
  • the device shown consists of a mobile platform 1 supported by four legs 2 at the lower ends of which wheels 3 are fitted to enable the device to be moved, for example, on rails 4 laid along the tunnel as work proceeds.
  • the travel motion is obtained with the aid of a suitable electrical, hydraulic or pneumatic drive means 5 which may, for example, be mounted on the platform 1 in the manner shown in the drawing with broken lines only, and linked to the wheel 3 through suitable transmission, for example chains 6.
  • a suitable electrical, hydraulic or pneumatic drive means 5 which may, for example, be mounted on the platform 1 in the manner shown in the drawing with broken lines only, and linked to the wheel 3 through suitable transmission, for example chains 6.
  • suitable electrical, hydraulic or pneumatic drive means 5 which may, for example, be mounted on the platform 1 in the manner shown in the drawing with broken lines only, and linked to the wheel 3 through suitable transmission, for example chains 6.
  • suitable transmission for example chains 6.
  • the platform 1 supports a spray nozzle 7 which may well be hinged in two planes, one in the direction of motion of the device and the other at right angles to it.
  • the nature of the swinging motions .in the longitudinal direction of the device should be sweeping movements, and these can suitably be achieved by means of a two-way pressure ram not shown here, in a generally known manner.
  • a sweep angle a of 1-20" on either side of the centre position of the nozzle has proved suitable.
  • the swinging motions of the end nozzle 7 in the plane at right angles to the direction of motion of the device should also preferably be of a sweep ing nature and may, for example, be achieved by means of a hydraulic motor 8, only indicated here in outline, at the free end of an extendable holder arm 9 at the same end of which the nozzle 7 is fitted.
  • a sweep angle B of i on either side of the centre position of the nozzle has proved suitable in the plane at right angles to the direction of motion of the device.
  • the holder arm 9 in this example has two telescopic tubular sections, the in and out motions of which can be achieved in a suitable generally known manner, for example, with the aid of a twoway pressure ram not shown here.
  • the extendable holder arm 9 is supported at its other end by a first swinging axis parallel to the direction of motion of platform 1', indicated by an arrow in FIG. I.
  • a first swinging axis parallel to the direction of motion of platform 1' indicated by an arrow in FIG. I.
  • intermediate arm 11 is in turn situated at the free end of at least one intermediate arm 11, which in turn is pivoted on a second swinging axis parallel with the first, this second axis being defined by a hydraulic motor 12, indicated on the drawing by broken lines.
  • intermediate arm 11 can also be swung in a plane at right angles to the direction of motion to the device.
  • Hydraulic motor 12 which defines the above mentioned second swinging axis, is situated in the version shown here at one end, more precisely the front end, of the platform. If considered appropriate, this hydraulic motor 12 can also be mounted at the outer end of a support projecting from the platform, this support possibly being capable of being moved back and forth by generally known means, such as a two-way pressure ram, relative to the platform in such a way that the second swinging axis, hydraulic motor 12 can also be longitudinally displaced relative to platform 1.
  • a device supported by a mobile platform for the application of a sprayable material to a surface, for example sprayed concrete to a tunnel wall, comprising a spray nozzle which is fitted to the free end of an extendable holder arm, characterized in that theholder arm is pivoted at its other end on a first swinging axis parallel to the direction of motion of the platform and is extendable radially relative to said direction of motion, the axis being situated at the free end of at least one intermediate arm, which in turn is pivoted on a second swinging axis parallel with the first swinging axis.
  • a device as claimed in claim 2 wherein a hydraulic motor for the swinging motions of holder arm and intermediate arm is mounted at the swinging axis of the respective arm.
  • Colnmn 4 (claim 3) line line line line line line line line line line Column 4 (Claim 4) before movable end,

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Lining And Supports For Tunnels (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

The present invention relates to a device supported by a mobile platform for the application of a sprayable material to a surface, for example sprayed concrete to a tunnel wall. It comprises a spray nozzle which is fitted to the free end of an extendable holder arm and it is mainly characterized in that the holder arm is pivoted at its lower end on a first swinging axis parallel to the direction of motion of the platform, the axis being situated at the free end of at least one intermediate arm, which in turn is pivoted on a second swinging axis parallel with the first swinging axis.

Description

United States Patent 1 Pulk, deceased et al.
[4 Sept. 3, 1974 [73] Assignee: Stabilator AB, Bromma, Sweden [22] Filed: Feb. 22, I973 [21] Appl. No.: 334,596
[30] Foreign Application Priority Data Feb. 29, 1972 Sweden 2531/72 [5 6] References Cited UNITED STATES PATENTS 2,102,738 Perkins 239/160 X 2,185,570 l/l940 Ridley 239/160 X 3,153,510 10/1964 Brannfors et al. 239/176 X 3,276,695 lO/l966 Diardino et al 239/265 X FOREIGN PATENTS OR APPLICATIONS 718,847 ll/l954 Great Britain 239/176 l,l62,340 8/1969 Great Britain 239/178 Primary Examiner-Robert S. Ward, Jr. Attorney, Agent, or Firm-Anthony A. O'Brien [57] ABSTRACT The present invention relates to a device supported by a mobile platform for the application of a sprayable material to a surface, for example sprayed concrete to a tunnel wall. It comprises a spray nozzle which is fitted to the free end of an extendable holder arm and it is mainly characterized in that the holder arm is pivoted at its lower end on a first swinging axis parallel to the direction of motion of the platform, the axis being situated at the free end of at least one intermediate arm, which in turn is pivoted on a second swinging axis parallel with the first swinging axis.
5 Claims, 2 Drawing Figures I MOBILE-PLATFORM-SUPPORTED DEVICE FOR THE APPLICATION OF A SPRAYABLE MATERIAL TO A SURFACE The present invention relates to a device supported by a mobile platform for the application of a sprayable material to a surface, and comprising a spray nozzle arranged at the free end of an extendable holder arm.
Among the applications of such devices is the coating of tunnel walls with sprayed concrete, and in this connection they have proved to have the great disadvantage that, especially with the technique known as fullface tunnelling, it has not been possible to achieve fully-mechanized continuous tunnelling and reinforcing work. This has been particularly true where the tunnelling machine used is of the type known as a full-face machine, from which the material excavated at the tunnel face must be conveyed away as work proceeds. Up to now it has not been possible to achieve this since the devices intended to coat or line the tunnel walls with sprayed concrete were not able to follow the full-face tunnelling machine at the same speed; there were interruptions in the removal of the material excavated at the tunnel face. Not only do these interruptions interfere with the desirable rhythm of working, they also contribute to increasing the risks of falls in the tunnel, since, because of the interruptions for the removal of excavated material, the fall-preventing first coating of sprayed concrete cannot be applied gradually as the machine-works its way forward.
The purpose of the invention is to describe a new and improved device of the type mentioned initially, which would overcome the disadvantage mentioned above. A.
device constructed in accordance with the invention which is chiefly characterized in that the holder arm pivots at its other end around a first swinging axis parallel with the direction of motion of the platform, the swinging axis being situated at the free end of at least one intermediate arm which in turn pivots around a second swinging axis parallel with the first swinging axis, has also proved in practical tests that it fulfils the purpose stated. The arrangement according to the invention for the swinging support of the holder arm at the free end of a similarly pivoted intermediate arm en-. ables the new device to apply coatings of sprayed concrete to the walls and roofs of tunnels without the holder arm movements having to encroach on the central part of the tunnel at which the removal of the material excavated at the tunnel front by the tunnelling machine can now be permitted to proceed in the most economical manner, for instance by means of a conveyor belt.
In order that the central part of the tunnel may be freed even further for appropriate use, the platform occurring in a device in accordance with the invention can be provided on the underside with a portal-like passage.
In a particularly advantageous embodiment of the device according to the invention the second swinging axis, that is, the axis on which the intermediate arm pivots, may be situated at one end of the platform, more precisely, its front end. In this way the actual spraying of the concrete can take place in front of the platform, which has the advantage that an operator standing on the platform will always be below a roof already coated with concrete and would therefore be protected from falls as well as no longer being exposed to splashing from the concrete spraying now taking place some dis tance ahead.
The manoeuvrability of the holder arm can be greatly improved by making it possible to move the second swinging axis longitudinally relative to the platform, so that the holder arm supporting the spraying nozzle cannot only be swung in its own plane but can also be moved back and forth relative to'the platform.
In a particularly practical embodiment of the device according to the invention a hydraulic motor for the swinging movements of the holder arm and intermediate arrn is fitted at the swinging axis of the arm in question.
The invention will now be described in greater detail with reference to a preferred embodiment thereof shown schematically in the attached drawing.
FIG. 1 shows a side view of a device according to the invention, erected in a tunnel, while FIG. 2 shows a front view of this device seen from the direction indicated by the line 22 in FIG. 1.
. The device shown in the drawing is intended to follow a full-face tunnelling machine during tunnelling, in order to provide the emerging sections of the tunnel wall and roof with a coating or lining of sprayed concrete, as the tunnel is driven forward.
Essentially the device shown consists of a mobile platform 1 supported by four legs 2 at the lower ends of which wheels 3 are fitted to enable the device to be moved, for example, on rails 4 laid along the tunnel as work proceeds. I
The travel motion is obtained with the aid of a suitable electrical, hydraulic or pneumatic drive means 5 which may, for example, be mounted on the platform 1 in the manner shown in the drawing with broken lines only, and linked to the wheel 3 through suitable transmission, for example chains 6. In the example shown, only the front pair of wheels is driven, but the rear wheels or possibly all wheels can of course be driven.
At its front end the platform 1 supports a spray nozzle 7 which may well be hinged in two planes, one in the direction of motion of the device and the other at right angles to it. The nature of the swinging motions .in the longitudinal direction of the device should be sweeping movements, and these can suitably be achieved by means of a two-way pressure ram not shown here, in a generally known manner. A sweep angle a of 1-20" on either side of the centre position of the nozzle has proved suitable. The swinging motions of the end nozzle 7 in the plane at right angles to the direction of motion of the device should also preferably be of a sweep ing nature and may, for example, be achieved by means of a hydraulic motor 8, only indicated here in outline, at the free end of an extendable holder arm 9 at the same end of which the nozzle 7 is fitted. A sweep angle B of i on either side of the centre position of the nozzle has proved suitable in the plane at right angles to the direction of motion of the device.
To make it extendable, the holder arm 9 in this example has two telescopic tubular sections, the in and out motions of which can be achieved in a suitable generally known manner, for example, with the aid of a twoway pressure ram not shown here.
According to the invention the extendable holder arm 9 is supported at its other end by a first swinging axis parallel to the direction of motion of platform 1', indicated by an arrow in FIG. I. In the version shown which defines the first swinging axis mentioned above,
is in turn situated at the free end of at least one intermediate arm 11, which in turn is pivoted on a second swinging axis parallel with the first, this second axis being defined by a hydraulic motor 12, indicated on the drawing by broken lines. By means of this motor, intermediate arm 11 can also be swung in a plane at right angles to the direction of motion to the device.
Hydraulic motor 12, which defines the above mentioned second swinging axis, is situated in the version shown here at one end, more precisely the front end, of the platform. If considered appropriate, this hydraulic motor 12 can also be mounted at the outer end of a support projecting from the platform, this support possibly being capable of being moved back and forth by generally known means, such as a two-way pressure ram, relative to the platform in such a way that the second swinging axis, hydraulic motor 12 can also be longitudinally displaced relative to platform 1.
When the device is in operation, spray concrete is supplied to nozzle 7 in the requisite amount through the hose 13 connected to the nozzle, the other end of the hose being connected to concrete spraying equipment behind the device shown. The travel and spraying clearly in FIG. 2, where three different positions of the extendable holder arm 9 and nozzle 7 are shown with the paths of the swinging axis indicated by means of dashed-dotted lines. As can be seen from FIG. 2 the arrangement also enables concrete to be sprayed behind the pipework 15 for electric power, air and water to the tunnelling machine operating ahead of the device according to the invention.
The invention is not limited to the embodiment described above and shown in the drawing; it may be modified in a variety of ways within the framework of the following patent claims.
What is claimed is:
1. A device supported by a mobile platform for the application of a sprayable material to a surface, for example sprayed concrete to a tunnel wall, comprising a spray nozzle which is fitted to the free end of an extendable holder arm, characterized in that theholder arm is pivoted at its other end on a first swinging axis parallel to the direction of motion of the platform and is extendable radially relative to said direction of motion, the axis being situated at the free end of at least one intermediate arm, which in turn is pivoted on a second swinging axis parallel with the first swinging axis.
2. A device as claimed in claim 1, wherein the second swinging axis is situated at one end of the platform.
3. A device as claimed in claim 2, wherein the second swinging axis is movable longitudinally relative to the platform.
4. A device as claimed in claim 2 wherein a hydraulic motor for the swinging motions of holder arm and intermediate arm is mounted at the swinging axis of the respective arm.
5. A device as claimed in claim 2 wherein the platform has a portal-like passage below it.
Patent No. 3 r 833 I 75 September 3, 1974 Dated Inventor(s) ELGAS PULK et al It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
Column 4 (Claim 1) line line line line line line
line
Colnmn 4 (claim 3) line line line line line line line line Column 4 (Claim 4) before movable end,
delete "other" and insert said another before "axis" insert first swinging and change 'at least one" to the delete "is" and insert has its other end delete "movable longitudinally relative to" and insert therefore extendable in the direction of motion of after "platform" insert from said end of the platform delete a in its second occurence; change "motor" to motors after "for" insert providing "holder" insert the after "and" insert the change "is" to are UNITED STATES PATENT OFFICE g 2 CERTIFICATE OF CORRECTION Patent NO. 3,833,175 Dated September 3, 1974 ELGAS PULK et al i Inventor(s) It is certified that error appears in the above-identified patent Q and that said Letters Patent are hereby corrected as shown below:
Column 4 (Claim 4) line 32, before "swinging" insert respective line 32, change "axis to axes Q line 32, delete "the" second occurence; line 33, delete "respective" and insert therefore each Signed and Scaled this third Day 0 February 1976 [SEAL] Arrest:
RUTH C. MASON C. MARSHALL DANN Arresting Officer Commissioner ofPatents and Trademarks

Claims (5)

1. A device supported by a mobile platform for the application of a sprayable material to a surface, for example sprayed concrete to a tunnel wall, comprising a spray nozzle which is fitted to the free end of an extendable holder arm, characterized in that the holder arm is pivoted at its other end on a first swinging axis parallel to the direction of motion of the platform and is extendable radially relative to said direction of motion, the axis being situated at the free end of at least one intermediate arm, which in turn is pivoted on a second swinging axis parallel with the first swinging axis.
2. A device as claimed in claim 1, wherein the second swinging axis is situated at one end of the platform.
3. A device as claimed in claim 2, wherein the second swinging axis is movable longitudinally relative to the platform.
4. A device as claimed in claim 2 wherein a hydraulic motor for the swinging motions of holder arm and intermediate arm is mounted at the swinging axis of the respective arm.
5. A device as claimed in claim 2 wherein the platform has a portal-like passage below it.
US00334596A 1972-02-29 1973-02-22 Mobile-platform-supported device for the application of a sprayable material to a surface Expired - Lifetime US3833175A (en)

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AT (1) AT329108B (en)
AU (1) AU463202B2 (en)
CH (1) CH556445A (en)
DE (1) DE2307821A1 (en)
ES (1) ES412115A1 (en)
FR (1) FR2174042A1 (en)
IT (1) IT979148B (en)
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949937A (en) * 1975-01-29 1976-04-13 Nalco Chemical Company System for handling and applying a non-suspended refractory slurry
US4064656A (en) * 1975-06-10 1977-12-27 Alfred Gutmann Gesellschaft Fur Maschinenbau Device for blasting large and bulky workpieces
US4158443A (en) * 1977-06-02 1979-06-19 Tamotsu Kameda Fluid jet machine
US4210098A (en) * 1977-10-12 1980-07-01 Shell Internationale Research Maatschappij B.V. Apparatus for treating internal surfaces of walls of a tank
US4274590A (en) * 1978-11-11 1981-06-23 Paul Hammelmann Apparatus for treating upright surfaces
FR2743108A1 (en) * 1995-12-27 1997-07-04 Sandoz Sa METHOD AND DEVICE FOR COATING INTERIOR WALLS OF TUNNELS WITH SPRAYED CONCRETE
US6206016B1 (en) * 1998-07-27 2001-03-27 Mac & Mac Hydrodemolition Inc. Spray cleaner for interior surface of pipeline
US6418947B1 (en) 1998-07-30 2002-07-16 Mac & Mac Hydrodemolition, Inc. Scarifier for interior surface of pipeline
US6550486B2 (en) 1998-07-30 2003-04-22 Mac & Mac Hydrodemolition, Inc. Apparatus for scarifying the interior surface of a pipeline
US6644325B2 (en) * 1998-07-30 2003-11-11 Mac & Mac Hydrodemoliton, Inc. Method for scarifying an interior surface of a pipeline
US20040025912A1 (en) * 1998-07-30 2004-02-12 Macneil Gerard Scarifier for the interior surface of a pipeline
US20050150531A1 (en) * 2002-05-15 2005-07-14 Macneil Gerard J. Interior sewer pipeline scarifying apparatus
US20100192982A1 (en) * 2009-02-02 2010-08-05 Macneil Gerard Pipe scarifying system and method
US20150017061A1 (en) * 2013-07-15 2015-01-15 American Water Works Company, Inc. Disinfection of water mains using ultraviolet light
CN106545348A (en) * 2017-01-22 2017-03-29 徐州徐工施维英机械有限公司 The jib structure and shotcrete vehicle of shotcrete vehicle
US9919333B2 (en) 2015-01-09 2018-03-20 Stoneage, Inc. High pressure waterblasting nozzle manipulator apparatus
CN108798710A (en) * 2017-04-27 2018-11-13 湖南五新隧道智能装备股份有限公司 Concrete pumping lever arm and concrete spreader containing this lever arm
US11142470B2 (en) 2013-07-15 2021-10-12 American Water Works Company, Inc. Disinfection of water mains using ultraviolet light and oxidizing agents

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SE399733B (en) * 1976-06-01 1978-02-27 Stabilator Ab SET AND DEVICE FOR CONCRETE SPRAYING
DE2827891C3 (en) * 1978-06-24 1981-11-05 Yasui Sangyo Co., Ltd., Fujinomiya, Shizuoka Device for spraying liquid
SE7809146L (en) * 1978-08-30 1980-03-01 Hultgren Folke DEVICE FOR APPLYING A SPRAYABLE MATERIAL ON A SURFACE
DE3836278A1 (en) * 1988-10-25 1990-04-26 Schlick Heinrich Gmbh Co Kg Device for blasting, or the like, the inner surfaces of channels with granular material
EP0365921B1 (en) * 1988-10-25 1992-03-11 HEINRICH SCHLICK GmbH Device for navigating closed canals
ES2717140T3 (en) * 2015-01-09 2019-06-19 Stoneage Inc High pressure water gun nozzle manipulator

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US2102738A (en) * 1936-05-22 1937-12-21 Albert G Perkins Pipe coating apparatus
US2185570A (en) * 1936-07-30 1940-01-02 Ridley Harry Lining of pipes with cementitious material
GB718847A (en) * 1952-09-25 1954-11-24 Allman Patents Ltd Improvements in spraying apparatus
US3153510A (en) * 1960-03-04 1964-10-20 Skanska Cementgjuteriet Ab Rock-tunneling apparatus
US3276695A (en) * 1965-09-29 1966-10-04 Concrete Placement Systems Inc Coating apparatus
GB1162340A (en) * 1967-07-03 1969-08-27 Skanska Cementgjuteriet Ab Apparatus for Applying a Sprayable Material to a Surface, e.g. A Rock Wall

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US2102738A (en) * 1936-05-22 1937-12-21 Albert G Perkins Pipe coating apparatus
US2185570A (en) * 1936-07-30 1940-01-02 Ridley Harry Lining of pipes with cementitious material
GB718847A (en) * 1952-09-25 1954-11-24 Allman Patents Ltd Improvements in spraying apparatus
US3153510A (en) * 1960-03-04 1964-10-20 Skanska Cementgjuteriet Ab Rock-tunneling apparatus
US3276695A (en) * 1965-09-29 1966-10-04 Concrete Placement Systems Inc Coating apparatus
GB1162340A (en) * 1967-07-03 1969-08-27 Skanska Cementgjuteriet Ab Apparatus for Applying a Sprayable Material to a Surface, e.g. A Rock Wall

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3949937A (en) * 1975-01-29 1976-04-13 Nalco Chemical Company System for handling and applying a non-suspended refractory slurry
US4064656A (en) * 1975-06-10 1977-12-27 Alfred Gutmann Gesellschaft Fur Maschinenbau Device for blasting large and bulky workpieces
US4158443A (en) * 1977-06-02 1979-06-19 Tamotsu Kameda Fluid jet machine
US4210098A (en) * 1977-10-12 1980-07-01 Shell Internationale Research Maatschappij B.V. Apparatus for treating internal surfaces of walls of a tank
US4274590A (en) * 1978-11-11 1981-06-23 Paul Hammelmann Apparatus for treating upright surfaces
FR2743108A1 (en) * 1995-12-27 1997-07-04 Sandoz Sa METHOD AND DEVICE FOR COATING INTERIOR WALLS OF TUNNELS WITH SPRAYED CONCRETE
US6206016B1 (en) * 1998-07-27 2001-03-27 Mac & Mac Hydrodemolition Inc. Spray cleaner for interior surface of pipeline
US20040025912A1 (en) * 1998-07-30 2004-02-12 Macneil Gerard Scarifier for the interior surface of a pipeline
US6550486B2 (en) 1998-07-30 2003-04-22 Mac & Mac Hydrodemolition, Inc. Apparatus for scarifying the interior surface of a pipeline
US6644325B2 (en) * 1998-07-30 2003-11-11 Mac & Mac Hydrodemoliton, Inc. Method for scarifying an interior surface of a pipeline
US6418947B1 (en) 1998-07-30 2002-07-16 Mac & Mac Hydrodemolition, Inc. Scarifier for interior surface of pipeline
US7128074B2 (en) 1998-07-30 2006-10-31 Mac & Mac Hydrodemolition, Inc. Scarifier for the interior surface of a pipeline
USRE44518E1 (en) 1998-07-30 2013-10-08 Mac & Mac Hydrodemolition Inc. Method of scarifying an interior surface of a pipeline
US20050150531A1 (en) * 2002-05-15 2005-07-14 Macneil Gerard J. Interior sewer pipeline scarifying apparatus
US8394205B2 (en) 2009-02-02 2013-03-12 Mac & Mac Hydrodemolition Inc. Pipe scarifying system and method
US20100192982A1 (en) * 2009-02-02 2010-08-05 Macneil Gerard Pipe scarifying system and method
US20150017061A1 (en) * 2013-07-15 2015-01-15 American Water Works Company, Inc. Disinfection of water mains using ultraviolet light
US9586837B2 (en) * 2013-07-15 2017-03-07 American Water Works Company, Inc. Disinfection of water mains using ultraviolet light
US11142470B2 (en) 2013-07-15 2021-10-12 American Water Works Company, Inc. Disinfection of water mains using ultraviolet light and oxidizing agents
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Also Published As

Publication number Publication date
AT329108B (en) 1976-04-26
NO129863B (en) 1974-06-04
ATA152973A (en) 1975-07-15
AU5214773A (en) 1974-08-15
IT979148B (en) 1974-09-30
AU463202B2 (en) 1975-07-17
ES412115A1 (en) 1976-01-01
CH556445A (en) 1974-11-29
JPS4899933A (en) 1973-12-17
SE360895B (en) 1973-10-08
DE2307821A1 (en) 1973-09-06
FR2174042A1 (en) 1973-10-12

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