US20050223510A1 - Hydraulically dynamic mono-pig scraper - Google Patents
Hydraulically dynamic mono-pig scraper Download PDFInfo
- Publication number
- US20050223510A1 US20050223510A1 US11/151,666 US15166605A US2005223510A1 US 20050223510 A1 US20050223510 A1 US 20050223510A1 US 15166605 A US15166605 A US 15166605A US 2005223510 A1 US2005223510 A1 US 2005223510A1
- Authority
- US
- United States
- Prior art keywords
- conduit
- internal surface
- pig scraper
- sealing
- pig
- 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.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
- B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
- B08B9/0554—Diablo shaped pigs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
- B05B12/1481—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet comprising pigs, i.e. movable elements sealingly received in supply pipes, for separating different fluids, e.g. liquid coating materials from solvent or air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
- B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
- B05B5/1616—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material
- B05B5/1625—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive and the arrangement comprising means for insulating a grounded material source from high voltage applied to the material the insulating means comprising an intermediate container alternately connected to the grounded material source for filling, and then disconnected and electrically insulated therefrom
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/16—Arrangements for supplying liquids or other fluent material
- B05B5/1608—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive
- B05B5/1675—Arrangements for supplying liquids or other fluent material the liquid or other fluent material being electrically conductive the supply means comprising a piston, e.g. a piston pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/12—Hoses, i.e. flexible pipes made of rubber or flexible plastics with arrangements for particular purposes, e.g. specially profiled, with protecting layer, heated, electrically conducting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/24—Preventing accumulation of dirt or other matter in the pipes, e.g. by traps, by strainers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/10—Treating the inside of pipes
- F16L2101/12—Cleaning
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/20—Expelling gases or fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L2101/00—Uses or applications of pigs or moles
- F16L2101/40—Separating transported fluids
Definitions
- the invention relates to a pig scraper for cleaning a coating agent conduit of a coating unit.
- the coating unit can be a paint unit for an automotive assembly line.
- a first set of automotive parts can be painted a first color by the coating unit.
- a second set of automotive parts can be painted a second color by the coating unit after the pig scraper has removed the first paint residue from the coating agent conduits of the coating unit.
- a pig scraper is disclosed in EP 0405075B1, which consists of a basic body which can be inserted into a coating agent conduit.
- the basic body includes a sealing lip which essentially extends radially from the basic body and is located on a jacket surface of the basic body. During operation, the sealing lip fits tightly against the inside wall of the coating agent conduit to be cleaned. The pig scraper scrapes off coating residue sticking to the inside wall of the coating agent conduit and this way builds up an axial isolation path.
- the present invention provides a pig scraper for cleaning a coating agent conduit.
- the pig scraper includes a body that is insertable in the coating agent conduit. At least one sealing lip extends from the body that is substantially parallel to a longitudinal axis of the body. The sealing lip seals against the coating agent conduit.
- the body and the sealing lip are integrally formed with respect to one another.
- the pig scraper can be cast or molded from a water lacquer resistant material or a solvent resistant material.
- the pig scraper can also include a signal transmitter positioned in situ with respect to the body.
- the signal transmitter can be a permanent magnet or steel.
- the sealing lip is substantially prevented from folding over on itself
- the sealing lip can be formed with several features that reduce the likelihood that the lip will fold over on itself.
- the lip can extend a first distance parallel to the body and a second distance radially from the body, wherein the radial distance is ten percent of the axial distance.
- the first distance can be six percent of the length of the body.
- FIG. 1 is a cross-sectional view of a pig scraper according to the exemplary embodiment of the invention.
- the invention provides a pig scraper 10 for cleaning a coating agent conduit 12 of a coating unit.
- the pig scraper 10 includes a body 14 having a length and a longitudinal axis 16 .
- the pig scraper 10 also includes at least one sealing lip 18 extending from the body 14 and substantially parallel to the longitudinal axis 16 of the body 14 .
- the body 14 extends between first and second ends 20 , 22 . As shown by the exemplary embodiment of the invention, the body 14 defines three coaxial cylindrical portions 24 , 26 , 28 having diameters 30 , 32 , 34 , respectively. One of the diameters 30 , 32 , 34 is preferably 80% of an inside diameter 36 of the conduit 12 . More preferably, the minimum of the diameters 30 , 32 , 34 of the body 14 is 80% of the diameter 36 .
- the body 14 is formed from an elastomer that is preferably water resistant and/or solvent resistant. The body 14 can be molded or cast.
- the body 14 and the lip 18 are integrally formed with respect to one another.
- the lip 18 extends from the portion 26 to a tip 38 .
- a free length of the lip 18 extending from the portion 26 to the tip 38 is at least 15% of the diameter 36 of the conduit 12 .
- the free length of the lip 18 is six percent of the length of the body 14 .
- the end 20 of the body is axially further from the portion 26 than the tip to act as a stop buffer. The stop buffer defined by the end 20 reduces the likelihood of damage to the sealing lip 18 in the event the scraper 10 encounters a second scraper in the conduit 12 or a stop.
- a sealing edge 40 extends from the sealing lip 18 radially outwardly with respect to the axis 16 .
- the height of the edge 40 is at most ten percent of the free length of the lip 18 .
- the height of the edge 40 depends on the rigidity of the material used for the sealing lip, the material strength, and the friction between the edge 40 and the inside wall of the conduit 12 . For example, the height is relatively greater when the rigidity of the material is relatively greater.
- the sealing edge 40 encircles the lip 18 and seals against the inner wall of the conduit 12 .
- the sealing edge 40 includes a first surface 44 facing the first end 20 of the body 14 .
- the surface 44 defines an angle with the inner wall of the conduit 12 of between twenty-five degrees and sixty-five degrees. More preferably, the angle between the surface 44 and the inner wall of the conduit 12 is forty-five degrees.
- the sealing edge 40 also includes a second surface 46 .
- the second surface 46 defines an angle with the inner wall of the conduit 12 of between ten degrees and sixty degrees. More preferably, the angle defined between the second surface 46 and the inner wall of the conduit 12 is thirty degrees.
- the pig scraper 10 includes a second sealing lip 48 structured similarly with respect to the first sealing lip 18 .
- the lips 18 , 48 cooperate with the portions 24 , 28 respectively, to define first and second pockets 50 , 52 .
- the relative structure of the lips 18 , 48 with respect to the body 14 can reduce the likelihood that the sealing lips 18 , 48 will fold over during movement of the pig scraper 10 through the conduit 12 .
- the lip 18 is pressed against the inside wall of the conduit 12 by pressure of the motive medium, such as compressed air, acting on the pocket 50 .
- the sealing lip 48 is pressed against the inside wall of the conduit 12 during movement in the direction 54 by friction acting between the lip 48 and the inside wall of the conduit 12 .
- the sealing lip 48 is pressed against the inside wall of the conduit 12 by the motive medium and the sealing lip 18 is pressed against the inside wall of the conduit 12 by frictional forces.
- a signal transmitter 58 is located in the body 14 .
- the signal transmitter 58 is a permanent magnet, a steel core, or another permanent-magnetic material.
- the position of the pig scraper 10 can be monitored by monitoring the position of the signal transmitter 58 .
- the body 14 is formed around the signal transmitter 58 .
- the signal transmitter 58 is positioned in situ with the body 14 .
- the body 14 defines a visible and palpable marking 60 , in the form of an elevation, to indicate the spatial orientation of the signal transmitter 58 within the body 14 .
- the pig scraper 10 can be inserted into the conduit 12 in a desired orientation.
Abstract
The invention concerns a pig scraper for cleaning the inside wall of a coating agent conduit. The pig scraper includes a body insertable in the conduit and at least one sealing lip that seals against the inside wall of the conduit and extends parallel to a longitudinal axis of the body. A space is defined between the sealing lip and the body to form a pocket for enhancing the sealing of the sealing lip with respect to the conduit. The length of the sealing lip substantially prevents the lip from folding over on itself in response to a change in the direction of movement of the pig scraper in the conduit.
Description
- The invention relates to a pig scraper for cleaning a coating agent conduit of a coating unit.
- In modern coating units for the series coating of construction parts, pig scrapers are used in order to remove coating agent from coating agent conduits. Coating agent residues, which stick to the inside wall of coating agent conduits, must be removed after coating operations. For example, the coating unit can be a paint unit for an automotive assembly line. A first set of automotive parts can be painted a first color by the coating unit. A second set of automotive parts can be painted a second color by the coating unit after the pig scraper has removed the first paint residue from the coating agent conduits of the coating unit.
- A pig scraper is disclosed in EP 0405075B1, which consists of a basic body which can be inserted into a coating agent conduit. The basic body includes a sealing lip which essentially extends radially from the basic body and is located on a jacket surface of the basic body. During operation, the sealing lip fits tightly against the inside wall of the coating agent conduit to be cleaned. The pig scraper scrapes off coating residue sticking to the inside wall of the coating agent conduit and this way builds up an axial isolation path.
- One disadvantage of pig scrapers currently known in the art is that the sealing lip can fold over in the axial direction of the body of the pig scraper when the direction of movement of the pig scraper is changed. When the lip of the pig scraper folds over, a portion of the lip is subjected to excessive deformation forces. As a result, the life of the pig scraper is shortened.
- The present invention provides a pig scraper for cleaning a coating agent conduit. The pig scraper includes a body that is insertable in the coating agent conduit. At least one sealing lip extends from the body that is substantially parallel to a longitudinal axis of the body. The sealing lip seals against the coating agent conduit. The body and the sealing lip are integrally formed with respect to one another. For example, the pig scraper can be cast or molded from a water lacquer resistant material or a solvent resistant material. The pig scraper can also include a signal transmitter positioned in situ with respect to the body. The signal transmitter can be a permanent magnet or steel.
- One of the advantages of the present invention is that the sealing lip is substantially prevented from folding over on itself The sealing lip can be formed with several features that reduce the likelihood that the lip will fold over on itself. For example, the lip can extend a first distance parallel to the body and a second distance radially from the body, wherein the radial distance is ten percent of the axial distance. In addition, the first distance can be six percent of the length of the body.
- Other advantages of the present invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
-
FIG. 1 is a cross-sectional view of a pig scraper according to the exemplary embodiment of the invention. - Referring now to
FIG. 1 , the invention provides apig scraper 10 for cleaning a coating agent conduit 12 of a coating unit. Thepig scraper 10 includes abody 14 having a length and alongitudinal axis 16. Thepig scraper 10 also includes at least onesealing lip 18 extending from thebody 14 and substantially parallel to thelongitudinal axis 16 of thebody 14. - The
body 14 extends between first andsecond ends body 14 defines three coaxialcylindrical portions diameters diameters inside diameter 36 of theconduit 12. More preferably, the minimum of thediameters body 14 is 80% of thediameter 36. Thebody 14 is formed from an elastomer that is preferably water resistant and/or solvent resistant. Thebody 14 can be molded or cast. - Preferably, the
body 14 and thelip 18 are integrally formed with respect to one another. In the exemplary embodiment of the invention, thelip 18 extends from theportion 26 to atip 38. Preferably, a free length of thelip 18 extending from theportion 26 to thetip 38 is at least 15% of thediameter 36 of theconduit 12. Alternatively, or additionally, the free length of thelip 18 is six percent of the length of thebody 14. Theend 20 of the body is axially further from theportion 26 than the tip to act as a stop buffer. The stop buffer defined by theend 20 reduces the likelihood of damage to thesealing lip 18 in the event thescraper 10 encounters a second scraper in theconduit 12 or a stop. - In the exemplary embodiment of the invention, a sealing
edge 40 extends from the sealinglip 18 radially outwardly with respect to theaxis 16. Preferably, the height of theedge 40, as measured from anouter surface 42 of thelip 18, is at most ten percent of the free length of thelip 18. The height of theedge 40 depends on the rigidity of the material used for the sealing lip, the material strength, and the friction between theedge 40 and the inside wall of theconduit 12. For example, the height is relatively greater when the rigidity of the material is relatively greater. - The sealing
edge 40 encircles thelip 18 and seals against the inner wall of theconduit 12. In the exemplary embodiment of the invention, thesealing edge 40 includes afirst surface 44 facing thefirst end 20 of thebody 14. Preferably, thesurface 44 defines an angle with the inner wall of theconduit 12 of between twenty-five degrees and sixty-five degrees. More preferably, the angle between thesurface 44 and the inner wall of theconduit 12 is forty-five degrees. The sealingedge 40 also includes asecond surface 46. Preferably, thesecond surface 46 defines an angle with the inner wall of theconduit 12 of between ten degrees and sixty degrees. More preferably, the angle defined between thesecond surface 46 and the inner wall of theconduit 12 is thirty degrees. - In the exemplary embodiment of the invention, the
pig scraper 10 includes asecond sealing lip 48 structured similarly with respect to thefirst sealing lip 18. Thelips portions second pockets lips body 14 can reduce the likelihood that thesealing lips pig scraper 10 through theconduit 12. For example, during movement of thepig scraper 10 in thedirection 54, thelip 18 is pressed against the inside wall of theconduit 12 by pressure of the motive medium, such as compressed air, acting on thepocket 50. Also, thesealing lip 48 is pressed against the inside wall of theconduit 12 during movement in thedirection 54 by friction acting between thelip 48 and the inside wall of theconduit 12. Similarly, when thepig scraper 10 moves in thedirection 56, thesealing lip 48 is pressed against the inside wall of theconduit 12 by the motive medium and the sealinglip 18 is pressed against the inside wall of theconduit 12 by frictional forces. - In a preferred embodiment of the invention, a
signal transmitter 58 is located in thebody 14. Thesignal transmitter 58 is a permanent magnet, a steel core, or another permanent-magnetic material. During operation of thepig scraper 10, the position of thepig scraper 10 can be monitored by monitoring the position of thesignal transmitter 58. Preferably, thebody 14 is formed around thesignal transmitter 58. In other words, thesignal transmitter 58 is positioned in situ with thebody 14. - In a preferred embodiment of the invention, the
body 14 defines a visible andpalpable marking 60, in the form of an elevation, to indicate the spatial orientation of thesignal transmitter 58 within thebody 14. In this way, thepig scraper 10 can be inserted into theconduit 12 in a desired orientation. - Obviously, many modifications and variations of the present invention are possible in light of the above teachings. The invention may be practiced otherwise than as specifically described within the scope of the appended claims. In addition, the reference numerals in the claims are merely for convenience and are not to be read in any way as limiting.
Claims (14)
1-16. (canceled)
17. A pig scraper for cleaning an internal surface of a conduit conveying coating, comprising:
a body having a length and a longitudinal axis; and
at least one sealing lip extending and spaced from said body portion including an outer surface spaced from said internal surface of said conduit, an annular sealing edge projecting from said outer surface of said sealing lip generally triangular in cross-section adjacent to but spaced from a free end of said sealing lip including first and second faces extending at an acute angle to said internal surface of said conduit and an apex resiliently biased against said internal surface of said conduit.
18. The pig scraper as defined in claim 17 , wherein said first face of said sealing edge adjacent said free end of said sealing lip defines an angle relative to said internal surface of said conduit of between 25 and 60 degrees.
19. The pig scraper as defined in claim 18 , wherein said first face is generally planar and defines an angle of about 45 degrees to said internal surface of said conduit.
20. The pig scraper as defined in claim 17 , wherein said second face of said sealing edge spaced furthest from said free end of said sealing lip is defined at an angle relative to said internal surface of said conduit of between 10 and 60 degrees.
21. The pig scraper as defined in claim 20 , wherein said first face of said sealing edge defines an angle to said internal surface of said conduit of about 30 degrees.
22. The pig scraper as defined in claim 17 , wherein said body portion extends through said sealing lip having a flat end face.
23. The pig scraper as defined in claim 17 , wherein said body portion includes a cylindrical end portion having a diameter less than said sealing lip including a flat end face.
24. The pig scraper as defined in claim 17 , wherein said sealing lip has an axial length greater than 15% of an internal diameter of said internal surface of said conduit.
25. A pig scraper for cleaning an internal surface of a conduit conveying a coating, comprising:
an integral body portion having a longitudinal axis, a length and opposed cylindrical end portions each having a flat end face; and
opposed resilient sealing lips integral with said body portion spaced from and surrounding one of said cylindrical end portions spaced from said flat end face each including an outer edge extending toward but spaced from said flat end face resiliently biased against said internal surface of said conduit.
26. The pig scraper as defined in claim 25 , wherein said outer surface of said resilient sealing lips each include an annular external edge projecting from an outer surface of said resilient sealing lips adjacent to but spaced from a free end of said sealing lips resiliently biased against said internal surface of said conduit.
27. The pig scraper as defined in claim 26 , wherein said annular edge is generally triangular in cross-section having first and second faces extending at an acute angle to said internal surface of said conduit and an apex resiliently biased against said internal surface of said conduit.
28. The pig scraper as defined in claim 27 , wherein said first and second faces of said annular edge are planar and said apex is a relatively sharp edge.
29. The pig scraper as defined in claim 25 , wherein said outer surface of said sealing lips are cylindrical and generally parallel to said internal surface of said conduit.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/151,666 US20050223510A1 (en) | 2003-01-20 | 2005-06-13 | Hydraulically dynamic mono-pig scraper |
US11/434,411 US7213290B2 (en) | 2003-01-20 | 2006-05-15 | Hydraulically dynamic mono-pig scraper |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10301942.1 | 2003-01-20 | ||
DE10301942A DE10301942A1 (en) | 2003-01-20 | 2003-01-20 | Apparatus for conveying liquid paint from a cannister through a supply line to an electrostatic applicator, comprises first and second pigs, the movement of which from first station to second station delivers solvent to applicator |
US10/760,954 US20040163192A1 (en) | 2003-01-20 | 2004-01-20 | Hydraulically dynamic mono-pig scraper |
US11/151,666 US20050223510A1 (en) | 2003-01-20 | 2005-06-13 | Hydraulically dynamic mono-pig scraper |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/760,954 Continuation US20040163192A1 (en) | 2003-01-20 | 2004-01-20 | Hydraulically dynamic mono-pig scraper |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/434,411 Continuation US7213290B2 (en) | 2003-01-20 | 2006-05-15 | Hydraulically dynamic mono-pig scraper |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050223510A1 true US20050223510A1 (en) | 2005-10-13 |
Family
ID=32602761
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/760,954 Abandoned US20040163192A1 (en) | 2003-01-20 | 2004-01-20 | Hydraulically dynamic mono-pig scraper |
US11/151,666 Abandoned US20050223510A1 (en) | 2003-01-20 | 2005-06-13 | Hydraulically dynamic mono-pig scraper |
US11/434,411 Expired - Lifetime US7213290B2 (en) | 2003-01-20 | 2006-05-15 | Hydraulically dynamic mono-pig scraper |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/760,954 Abandoned US20040163192A1 (en) | 2003-01-20 | 2004-01-20 | Hydraulically dynamic mono-pig scraper |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/434,411 Expired - Lifetime US7213290B2 (en) | 2003-01-20 | 2006-05-15 | Hydraulically dynamic mono-pig scraper |
Country Status (4)
Country | Link |
---|---|
US (3) | US20040163192A1 (en) |
AT (1) | ATE507430T1 (en) |
DE (3) | DE10301942A1 (en) |
ES (1) | ES2365396T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080105199A1 (en) * | 2006-11-06 | 2008-05-08 | Herbert Martin | Scraper pig |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10301942A1 (en) * | 2003-01-20 | 2004-07-29 | Dürr Systems GmbH | Apparatus for conveying liquid paint from a cannister through a supply line to an electrostatic applicator, comprises first and second pigs, the movement of which from first station to second station delivers solvent to applicator |
DE10231421A1 (en) * | 2002-07-11 | 2004-01-22 | Dürr Systems GmbH | Method and system for supplying a powder coating device |
DE10240072B4 (en) * | 2002-08-30 | 2005-11-24 | Dürr Systems GmbH | Pig for conveying a coating material and process for its preparation |
DE102006025546B4 (en) * | 2006-06-01 | 2010-06-02 | Eisenmann Anlagenbau Gmbh & Co. Kg | Pig for conveying a working medium |
US9126754B2 (en) * | 2008-12-18 | 2015-09-08 | Premium Patents Snd. Bhd | Method and system for pushing and moving solid waste |
DE102013216127B4 (en) * | 2013-08-14 | 2015-03-19 | Eberspächer Climate Control Systems GmbH & Co. KG | Flow damper, in particular for air flow attenuation in an air duct system of a vehicle |
DE102014004718A1 (en) * | 2014-04-01 | 2015-10-01 | Eisenmann Ag | Coating system and method for coating objects |
DE102017120213A1 (en) * | 2017-09-01 | 2019-03-07 | Eisenmann Lactec Gmbh | Method for conveying a working medium |
FR3087362B1 (en) * | 2018-10-19 | 2022-12-16 | Exel Ind | FLUID PROJECTION INSTALLATION AND METHOD FOR DISPLACEMENT OF AN ASSOCIATED FLUID |
FR3098419B1 (en) * | 2019-07-12 | 2021-07-23 | Exel Ind | Fluid projection installation |
DE102021131136A1 (en) | 2021-11-26 | 2023-06-01 | Dürr Systems Ag | Coating agent supply device |
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US20080105199A1 (en) * | 2006-11-06 | 2008-05-08 | Herbert Martin | Scraper pig |
US8671495B2 (en) * | 2006-11-06 | 2014-03-18 | Durr Systems, Inc. | Scraper pig |
Also Published As
Publication number | Publication date |
---|---|
ES2365396T3 (en) | 2011-10-03 |
DE60302702T2 (en) | 2006-10-05 |
DE60302702D1 (en) | 2006-01-19 |
US7213290B2 (en) | 2007-05-08 |
US20040163192A1 (en) | 2004-08-26 |
ATE507430T1 (en) | 2011-05-15 |
DE10301942A1 (en) | 2004-07-29 |
DE502004012430D1 (en) | 2011-06-09 |
US20060200923A1 (en) | 2006-09-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |