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WO2004031718A1 - Testing for water leaks in sealed joints - Google Patents

Testing for water leaks in sealed joints Download PDF

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Publication number
WO2004031718A1
WO2004031718A1 PCT/AU2003/001305 AU0301305W WO2004031718A1 WO 2004031718 A1 WO2004031718 A1 WO 2004031718A1 AU 0301305 W AU0301305 W AU 0301305W WO 2004031718 A1 WO2004031718 A1 WO 2004031718A1
Authority
WO
WIPO (PCT)
Prior art keywords
sealed joint
air
joint
sealed
pressurised
Prior art date
Application number
PCT/AU2003/001305
Other languages
French (fr)
Inventor
William Claudio Bona
Original Assignee
William Claudio Bona
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 William Claudio Bona filed Critical William Claudio Bona
Priority to AU2003265741A priority Critical patent/AU2003265741A1/en
Publication of WO2004031718A1 publication Critical patent/WO2004031718A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
    • G01M3/08—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds
    • G01M3/085—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds for pipe joints or seals
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/20—Check valves specially designed for inflatable bodies, e.g. tyres

Definitions

  • TITLE "TESTING FOR WATER LEAKS IN SEALED JOINTS" FIELD OF THE INVENTION
  • sealed joints may be present in structures which may include water storage structures inclusive of reservoirs, dams and culverts and building structures which may temporarily contain water, such as commercial buildings, factories, gutters, hospitals or car parks.
  • WO 01/06072 which describes a sealed joint or joint sealing system which includes application of a layer of debonding material across a gap between a pair of concrete slabs or walls each having an upper or external surface. There is also applied to the debonding material a filler cord to provide an elevated or raised joint and finally a coat of elastomer is applied to the joint to provide an external seamless covering.
  • the elastomer may be applied by use of a spray gun, brush or roller.
  • the conventional method to locate the source of such leaks was to send a diver into the water storage structure and apply a vegetable dye along sealed joints of the water storage structure. When the dye was drawn by suction into the sealed joint, the source of the water leakage was then located. Alternatively, a diver moved along the length of the joint looking for the source of water leakage by visual inspection. Another method was to empty the reservoir and visually inspect the sealed joints.
  • such methods were time consuming, expensive and inefficient in that, often, the source of the water leakage was not found.
  • the invention therefore provides a method of testing for water leakage in a sealed joint in a structure which contains water, said sealed joint having one or more air gaps, which includes the steps of:
  • step (iii) assessing the sealed joint for location of water leakage by the presence of air bubbles issuing from the pressurised joint.
  • step (iii) if the sealed joint is found to have water leakage, it is then marked or identified in a suitable manner and subsequently repaired after draining of water from the water storage structure if it is a water storage structure, for example.
  • each of the sealed joints may be provided with a pneumatic valve having a valve cap similar to pneumatic valves of vehicle tyres. Such a pneumatic valve may be located at spaced intervals along the length of each sealed joint.
  • each valve may have the cap removed and connected to a compressor or pump by an air hose for supply of pressurised air to the sealed joint for pressurisation of the sealed joint.
  • a diver may carry an air tank containing pressurised air having a short length of air hose for connection to an adjacent pneumatic valve after removal of the valve cap.
  • the invention in another aspect, provides a sealed joint having a valve connected thereto for pressurisation of air gap(s) of the sealed joint after opening of the valve.
  • sealed joints may be located between concrete slabs or walls as described above in WO 01/06072 or be provided between walls made of other material, such as metal, including steel or timber.
  • a structure inclusive of a water storage structure, having one or more sealed joints wherein the or each of the sealed joints is provided with the valve as described above at spaced intervals along the length of each sealed joint.
  • the pneumatic valve for use in the method of the invention, may comprise a valve of conventional type as discussed above already in use with vehicle tyres.
  • any conventional check valve may be used.
  • Such a valve may incorporate a valve body, a valve cap, and a valve chamber having a valve member movable therein from an open position allowing pressurised air to gain access to the valve chamber and, thus, to the interior of the sealed joint to a closed position preventing air gaining access to the valve chamber.
  • the valve member may comprise a pin or ball movable from the open to the closed position or vice versa under the influence of a spring.
  • the valve need not be restricted to this particular construction and any other pneumatic valve may be used. Examples of other pneumatic valves include those described in US Patent Nos 6,357,468 and 6,408,913, which are incorporated herein by reference.
  • FIG. 1 is an exploded perspective view of a sealed joint of a water storage structure having a pneumatic valve in accordance with the invention
  • FIG.2 is a similar view to FIG. 1 showing an assembled view of the sealed joint and the pneumatic valve
  • FIG. 3 is a variation of the assembly shown in FIGS. 1 to 2 using a support block or plate;
  • FIG. 4 is a perspective view of a reservoir having a plurality of pneumatic valves attached to each sealed joint thereof for use in the method of the invention wherein step (i) is carried out;
  • FIG. 5 is a similar view to FIG. 4 after steps (ii) and (iii) have been carried out;
  • FIG.6 is a similar view to FIG.4 with a modification that the air hose shown in FIG. 4 connected to an air supply tank of a swimmer is now attached to a compressor located externally of the reservoir;
  • FIGS.7 and 8 are sectional views of a pneumatic valve for use in the method of the invention in both the open and closed positions, respectively.
  • FIG. 1 there is shown sealed joint 10 having opposed concrete slabs or walls 11 , gap 12, upper surfaces 13 of slabs 11 and filler cord 14, which elevates debonding material or layer 15 above upper surfaces 13.
  • Debonding material 15 may have applied thereto elastomer 16.
  • air gaps 17 there is also present air gaps 17 in joint 10.
  • aperture 18 is made in debonding layer 15 and a pneumatic valve 19 is attached thereto having a valve cap 20, valve body 22 and base 23 which has a peripheral flange 24.
  • flange 24 makes sealing engagement with peripheral edge 25 of aperture 18.
  • FIG. 2 shows valve 19 incorporated in aperture 18 with valve cap 20 fitted to valve stem 22.
  • FIG.3 there is shown a variation of the arrangement shown in FIGS. 1 to 2, wherein there is provided a mounting block or plate 26 having a curvature or configuration complementary to debonding layer 15. Valve 19 is attached to an aperture 27 in mounting block 26 which is co- aligned with aperture 18. Again, flange 24 makes sealing engagement with a peripheral edge (not shown) of aperture 27.
  • reservoir 28 having a peripheral wall 29 and floor 30. Reservoir 28 is filled with water 31 to an upper level
  • each sealed joint 10 located at spaced intervals as shown. Also located along the length of each sealed joint 10 are pneumatic valves 19. As shown in FIG. 4, diver 32 has an air tank 33 strapped to him by harness 34. He also has an air hose 35 which he has inserted into valve 19A after removal of cap 20 so that the valve 19A may be pressurised to thereby pressurise sealed joint 10A. Thus, diver 32 is carrying out step (i) of the method of the invention. Also in FIG. 5, the diver has now disconnected air hose 35 from valve 19A and it is noted that air bubbles 36 have now risen from sealed joint 10A showing that joint 10A has a water leakage with the bubbles showing the location of the leak at 21. If no bubbles are detected, then joint 10A would not have a water leakage.
  • the diver 32 connects an air hose 35 which is connected to air compressor 37 at connection point 38.
  • Compressor 37 has air supply tank 39, wheels 40 and support 41.
  • FIGS. 7 and 8 show a detailed view of a conventional pneumatic valve 19 which has valve cap 20 having internal screw thread 20A.
  • pin 45 which can be directly attached to or integral with a longitudinal extension 45A of pin 45.
  • longitudinal extension 45A is indirectly attached to pin 45 via a ball joint or universal joint (not shown) in core structure 53 which functions as a housing for the ball joint or universal joint.
  • guide member 51 for pin 45 is retained in position by support or sealing member 52 which is screw threadedly engaged with internal screw thread 53A.
  • Pin 45 extends through a mating passage (not shown) in sealing member 52.
  • Sealing members 52 and core structure 53 have hollow passage(s) (not shown) to allow for passage of air.
  • Thread 20A of valve cap 20 is screw threadedly engageable with external screw thread 54.
  • the bottom end 55 of longitudinal extension 45A extends beyond member 50, as shown in FIG.7, to allow air to enter passage 57 of insert structure 58 as shown by the arrows in full outline.
  • valve body 59 There is also provided valve body 59.
  • Insert structure 58 is provided with a retaining passage or groove 60 which engages with aperture 25 of external layer 15 of sealed joint 10.
  • Insert 59 is provided with a enlarged resilient base portion 61 which locates below aperture 25, as shown. This is an alternative to the use of base 23 and flange 24 shown in FIGS. 1 to 3.
  • nozzle 62 having internal air passage 63 of an air hose 35 connected to compressor 37 has member 64 for depression of valve pin 45 to facilitate opening of valve 19.
  • the method of the invention is extremely efficient in relation to testing for leaks in water structures, such as reservoirs or dams, facilitating prompt repair.
  • the method of the invention may also be used for initial testing of reservoirs and dams with water only filled to a minimal height before complete filling takes place.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

A method of testing for water leakage in a sealed joint in a structure which contains water, said sealed joint having one or more air gaps, which includes the steps of connecting the sealed joint to a source of pressurised air so as to pressurise the air gap(s); disconnecting the sealed joint from the source of pressurised fluid and assessing the sealed joint for location of water leakage by the presence of air bubbles issuing from the pressurised joint. A sealed joint having one or more pneumatic valves attached thereto for pressurisation of air gap(s) located in the sealed joint. A pneumatic valve assembly comprising: a valve body having an internal chamber; and a valve member movable in the internal chamber from a closed position to an open position to permit passage of air through the internal chamber characterised in that said valve body is mounted to a mounting block for attachment to a sealed joint in a water containing structure.

Description

TITLE "TESTING FOR WATER LEAKS IN SEALED JOINTS" FIELD OF THE INVENTION THIS INVENTION relates to testing for water leaks in sealed joints, such sealed joints may be present in structures which may include water storage structures inclusive of reservoirs, dams and culverts and building structures which may temporarily contain water, such as commercial buildings, factories, gutters, hospitals or car parks.
BACKGROUND ART Reference may be made to International Publication
No WO 01/06072, which describes a sealed joint or joint sealing system which includes application of a layer of debonding material across a gap between a pair of concrete slabs or walls each having an upper or external surface. There is also applied to the debonding material a filler cord to provide an elevated or raised joint and finally a coat of elastomer is applied to the joint to provide an external seamless covering. The elastomer may be applied by use of a spray gun, brush or roller.
In the joint sealing system described in WO 01/06072, there are provided air gaps between the filler cord and layer of debonding material and air gaps are also present in the conventional joint sealing system described in FIG. 1 of WO 01/06072, which is used commercially under the
SIKADUR-COMBIFLEX trade mark.
In relation to water storage structures, if water leakage was occurring, the conventional method to locate the source of such leaks was to send a diver into the water storage structure and apply a vegetable dye along sealed joints of the water storage structure. When the dye was drawn by suction into the sealed joint, the source of the water leakage was then located. Alternatively, a diver moved along the length of the joint looking for the source of water leakage by visual inspection. Another method was to empty the reservoir and visually inspect the sealed joints. However, it was to be appreciated that such methods were time consuming, expensive and inefficient in that, often, the source of the water leakage was not found.
OBJECT OF THE INVENTION It has now been realised, during the advent of the present invention, that air gaps present in sealed joints in water storage structures, which were previously not used for any useful purpose, may provide a novel method of testing sealed joints for water leakages of water containing structures. SUMMARY OF THE INVENTION
The invention therefore provides a method of testing for water leakage in a sealed joint in a structure which contains water, said sealed joint having one or more air gaps, which includes the steps of:
(i) connecting the sealed joint to a source of pressurised air so as to pressurise the air gap(s);
(ii) disconnecting the sealed joint from the source of pressurised fluid; and
(iii) assessing the sealed joint for location of water leakage by the presence of air bubbles issuing from the pressurised joint. After step (iii), if the sealed joint is found to have water leakage, it is then marked or identified in a suitable manner and subsequently repaired after draining of water from the water storage structure if it is a water storage structure, for example. It will be appreciated that, in most cases, water storage structures will have a plurality of spaced sealed joints and, in accordance with the method of the invention, each of the sealed joints may be provided with a pneumatic valve having a valve cap similar to pneumatic valves of vehicle tyres. Such a pneumatic valve may be located at spaced intervals along the length of each sealed joint. During step (i) above, each valve may have the cap removed and connected to a compressor or pump by an air hose for supply of pressurised air to the sealed joint for pressurisation of the sealed joint. Alternatively, a diver may carry an air tank containing pressurised air having a short length of air hose for connection to an adjacent pneumatic valve after removal of the valve cap.
Following on from the foregoing, it will be appreciated that the invention, in another aspect, provides a sealed joint having a valve connected thereto for pressurisation of air gap(s) of the sealed joint after opening of the valve. Such sealed joints may be located between concrete slabs or walls as described above in WO 01/06072 or be provided between walls made of other material, such as metal, including steel or timber.
In another aspect of the invention, there is provided a structure, inclusive of a water storage structure, having one or more sealed joints wherein the or each of the sealed joints is provided with the valve as described above at spaced intervals along the length of each sealed joint.
The pneumatic valve, for use in the method of the invention, may comprise a valve of conventional type as discussed above already in use with vehicle tyres. Alternatively, any conventional check valve may be used. Such a valve may incorporate a valve body, a valve cap, and a valve chamber having a valve member movable therein from an open position allowing pressurised air to gain access to the valve chamber and, thus, to the interior of the sealed joint to a closed position preventing air gaining access to the valve chamber. Usually, the valve member may comprise a pin or ball movable from the open to the closed position or vice versa under the influence of a spring. However, it will be appreciated that the valve need not be restricted to this particular construction and any other pneumatic valve may be used. Examples of other pneumatic valves include those described in US Patent Nos 6,357,468 and 6,408,913, which are incorporated herein by reference.
BRIEF DESCRIPTION OF THE DRAWINGS Reference may now be made to a preferred embodiment of the invention as shown in the drawings attached hereto wherein: FIG. 1 is an exploded perspective view of a sealed joint of a water storage structure having a pneumatic valve in accordance with the invention;
FIG.2 is a similar view to FIG. 1 showing an assembled view of the sealed joint and the pneumatic valve; FIG. 3 is a variation of the assembly shown in FIGS. 1 to 2 using a support block or plate;
FIG. 4 is a perspective view of a reservoir having a plurality of pneumatic valves attached to each sealed joint thereof for use in the method of the invention wherein step (i) is carried out;
FIG. 5 is a similar view to FIG. 4 after steps (ii) and (iii) have been carried out;
FIG.6 is a similar view to FIG.4 with a modification that the air hose shown in FIG. 4 connected to an air supply tank of a swimmer is now attached to a compressor located externally of the reservoir; and
FIGS.7 and 8 are sectional views of a pneumatic valve for use in the method of the invention in both the open and closed positions, respectively.
DETAILED DESCRIPTION OF THE DRAWINGS In the drawings in FIG. 1 , there is shown sealed joint 10 having opposed concrete slabs or walls 11 , gap 12, upper surfaces 13 of slabs 11 and filler cord 14, which elevates debonding material or layer 15 above upper surfaces 13. Debonding material 15 may have applied thereto elastomer 16. There is also present air gaps 17 in joint 10. In accordance with the invention, aperture 18 is made in debonding layer 15 and a pneumatic valve 19 is attached thereto having a valve cap 20, valve body 22 and base 23 which has a peripheral flange 24. When valve 19 is attached to aperture 18, flange 24 makes sealing engagement with peripheral edge 25 of aperture 18. FIG. 2 shows valve 19 incorporated in aperture 18 with valve cap 20 fitted to valve stem 22.
In FIG.3, there is shown a variation of the arrangement shown in FIGS. 1 to 2, wherein there is provided a mounting block or plate 26 having a curvature or configuration complementary to debonding layer 15. Valve 19 is attached to an aperture 27 in mounting block 26 which is co- aligned with aperture 18. Again, flange 24 makes sealing engagement with a peripheral edge (not shown) of aperture 27.
In FIG. 4, there is shown reservoir 28 having a peripheral wall 29 and floor 30. Reservoir 28 is filled with water 31 to an upper level
32A. Floor 30 is provided with a plurality of sealed joints 10 located at spaced intervals as shown. Also located along the length of each sealed joint 10 are pneumatic valves 19. As shown in FIG. 4, diver 32 has an air tank 33 strapped to him by harness 34. He also has an air hose 35 which he has inserted into valve 19A after removal of cap 20 so that the valve 19A may be pressurised to thereby pressurise sealed joint 10A. Thus, diver 32 is carrying out step (i) of the method of the invention. Also in FIG. 5, the diver has now disconnected air hose 35 from valve 19A and it is noted that air bubbles 36 have now risen from sealed joint 10A showing that joint 10A has a water leakage with the bubbles showing the location of the leak at 21. If no bubbles are detected, then joint 10A would not have a water leakage.
In an alternative embodiment shown in FIG. 6, the diver 32 connects an air hose 35 which is connected to air compressor 37 at connection point 38. Compressor 37 has air supply tank 39, wheels 40 and support 41.
FIGS. 7 and 8 show a detailed view of a conventional pneumatic valve 19 which has valve cap 20 having internal screw thread 20A. There is also shown pin 45 which can be directly attached to or integral with a longitudinal extension 45A of pin 45. Preferably however, longitudinal extension 45A is indirectly attached to pin 45 via a ball joint or universal joint (not shown) in core structure 53 which functions as a housing for the ball joint or universal joint. Upon depression of valve member or pin 45, as shown in FIG.7, this enables sealing member 46 to move away from engagement with mating member 47 to thereby allow air to pass into bore 48 as shown by the arrows in full outline. If valve pin 45 remains depressed, air may also escape from bore 48. Depression of pin 45 takes place against the restoring force of spring 49 which is compressed between member 46 and bottom retainer 50.
In the operational or open position, guide member 51 for pin 45 is retained in position by support or sealing member 52 which is screw threadedly engaged with internal screw thread 53A. Pin 45 extends through a mating passage (not shown) in sealing member 52. Sealing members 52 and core structure 53 have hollow passage(s) (not shown) to allow for passage of air. Thread 20A of valve cap 20 is screw threadedly engageable with external screw thread 54. In the depressed position, the bottom end 55 of longitudinal extension 45A extends beyond member 50, as shown in FIG.7, to allow air to enter passage 57 of insert structure 58 as shown by the arrows in full outline. There is also provided valve body 59. Insert structure 58 is provided with a retaining passage or groove 60 which engages with aperture 25 of external layer 15 of sealed joint 10. Insert 59 is provided with a enlarged resilient base portion 61 which locates below aperture 25, as shown. This is an alternative to the use of base 23 and flange 24 shown in FIGS. 1 to 3.
It will also be noted in FIG. 7 that nozzle 62 having internal air passage 63 of an air hose 35 connected to compressor 37 (alternatively a pump may be used) has member 64 for depression of valve pin 45 to facilitate opening of valve 19.
It therefore will be appreciated from the foregoing that the method of the invention is extremely efficient in relation to testing for leaks in water structures, such as reservoirs or dams, facilitating prompt repair. The method of the invention may also be used for initial testing of reservoirs and dams with water only filled to a minimal height before complete filling takes place.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:
1. A method of testing for water leakage in a sealed joint in a structure which contains water, said sealed joint having one or more air gaps, which includes the steps of: (i) connecting the sealed joint to a source of pressurised air so as , to pressurise the air gap(s); (ii) disconnecting the sealed joint from the source of pressurised fluid; and (iii) assessing the sealed joint for location of water leakage by the presence of air bubbles issuing from the pressurised joint.
2. A method as claimed in claim 1 wherein in step (i) the sealed joint is connected to the sound of pressurised fluid via a conduit attached to a pneumatic valve located in the sealed joint.
3. A method as claimed in claim 2 wherein the step (i) the source of pressurised air is a compressor.
4. A method as claimed in claim 2 wherein the source of pressurised air is a pump.
5. A method as claimed in claim 2 wherein the source of pressurised air is an air tank attached to a diver.
6. A method as claimed in claim 2 wherein the water containing structure has a base or wall containing an elongate sealed joint and there is a plurality of pneumatic valves located at spaced intervals along the elongate sealed joint.
7. A sealed joint having one or more pneumatic valves attached thereto for pressurisation of air gap(s) located in the sealed joint.
8. A sealed joint as claimed in claim 7 wherein the sealed joint has a layer of debonding material which has a retaining aperture for the or each pneumatic valve retained therein.
9. A sealed joint as claimed in claim 8 wherein the layer of debonding material has a coating of elastomer.
10. A water containing structure which contains one or more sealed joints as claimed in claim 7 or 8.
11. A pneumatic valve assembly comprising: (i) a valve body having an internal chamber; and
(ii) a valve member movable in the internal chamber from a closed position to an open position to permit passage of air through the internal chamber characterised in that said valve body is mounted to a mounting block for attachment to a sealed joint in a water containing structure.
12. A pneumatic valve assembly as claimed in claim 11 wherein the mounting block has a retaining aperture for retention of the valve body and the mounting block in use is bonded to an adjacent surface of the sealed joint.
13. A pneumatic valve assembly as claimed in claim 11 or 12 wherein the mounting block has an enlarged base which is inserted through a retaining aperture in the sealed joint and retained therein by resilient expansion of the enlarged base.
PCT/AU2003/001305 2002-10-03 2003-10-03 Testing for water leaks in sealed joints WO2004031718A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003265741A AU2003265741A1 (en) 2002-10-03 2003-10-03 Testing for water leaks in sealed joints

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2002951813 2002-10-03
AU2002951813A AU2002951813A0 (en) 2002-10-03 2002-10-03 Testing for water leaks in sealed joints

Publications (1)

Publication Number Publication Date
WO2004031718A1 true WO2004031718A1 (en) 2004-04-15

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WO (1) WO2004031718A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114034441A (en) * 2021-11-05 2022-02-11 浙江川一阀门有限公司 Detection method for valve production engineering
WO2024145709A1 (en) * 2023-01-04 2024-07-11 Spearhead Sand Products Inc. Joint seal for panels used to form sectional tanks

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2125420A1 (en) * 1994-06-08 1995-12-09 Kevin Dudley Knight Method and apparatus for testing air barrier effectiveness
EP0860691A1 (en) * 1997-02-18 1998-08-26 Jean-Pierre Vigneron Procedure and device for investigating and/or measuring the leaktightness of pipelines and containers
JP2001066213A (en) * 1999-08-26 2001-03-16 Taisei Corp Tank airtightness inspection method
US6408913B1 (en) * 1998-02-19 2002-06-25 Pirelli Pneumatici S.P.A. Device for inflating and deflating a tire inner tube, inner tube and wheel formed by a tire and a rim inside which the inner tube is arranged

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2125420A1 (en) * 1994-06-08 1995-12-09 Kevin Dudley Knight Method and apparatus for testing air barrier effectiveness
EP0860691A1 (en) * 1997-02-18 1998-08-26 Jean-Pierre Vigneron Procedure and device for investigating and/or measuring the leaktightness of pipelines and containers
US6408913B1 (en) * 1998-02-19 2002-06-25 Pirelli Pneumatici S.P.A. Device for inflating and deflating a tire inner tube, inner tube and wheel formed by a tire and a rim inside which the inner tube is arranged
JP2001066213A (en) * 1999-08-26 2001-03-16 Taisei Corp Tank airtightness inspection method

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Derwent World Patents Index; Class S02 *
PATENT ABSTRACTS OF JAPAN *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114034441A (en) * 2021-11-05 2022-02-11 浙江川一阀门有限公司 Detection method for valve production engineering
CN114034441B (en) * 2021-11-05 2022-04-01 浙江川一阀门有限公司 Detection method for valve production engineering
WO2024145709A1 (en) * 2023-01-04 2024-07-11 Spearhead Sand Products Inc. Joint seal for panels used to form sectional tanks

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