GB2575991A - Pressure indicator cap - Google Patents
Pressure indicator cap Download PDFInfo
- Publication number
- GB2575991A GB2575991A GB1812426.3A GB201812426A GB2575991A GB 2575991 A GB2575991 A GB 2575991A GB 201812426 A GB201812426 A GB 201812426A GB 2575991 A GB2575991 A GB 2575991A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cap
- pressure indicator
- pipe
- diaphragm
- housing
- 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.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000000007 visual effect Effects 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 4
- 238000009428 plumbing Methods 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- 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
- F16L55/10—Means for stopping flow in pipes or hoses
- F16L55/115—Caps
- F16L55/1157—Caps using hooks, pawls, or other movable or insertable locking members
-
- 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
- F16L35/00—Special arrangements used in connection with end fittings of hoses, e.g. safety or protecting devices
-
- 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
- F16L55/10—Means for stopping flow in pipes or hoses
- F16L55/115—Caps
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/10—Means for indicating or recording, e.g. for remote indication mechanical
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges
- G01L7/08—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type
- G01L7/084—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges of the flexible-diaphragm type with mechanical transmitting or indicating means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
- G01L7/16—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of pistons
- G01L7/166—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of pistons with mechanical transmitting or indicating means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
A pressure indicator cap 10 for a pipe end 38 comprises an indicator element 24, e.g. a pin, having a first position for indicating that the pipe is not pressurised, and a second position for indicating that the pipe is pressurized. The cap additionally comprises a housing 12 with a first opening 18 for receiving the indicator element, and a second opening for connecting to the pipe end in a fluid-tight manner. Biasing means 28 is provided for biasing the indicator element into the first position, and a diaphragm 32 which forms a fluid-tight seal between the first opening and the second opening is arranged to move the indicator element from the first position to the second position when pressure is exerted on the diaphragm from the pipe. The biasing means can be a spring or the diaphragm being resilient. In the first position, the indicator can be entirely within the housing and in the second position it can at least in part protrude from the housing. The housing can comprise a tube portion for receiving the pipe end and a cap portion disposed across the end of the tube portion.
Description
5/5
PRESSURE INDICATOR CAP
The present invention relates to a pressure indicator cap for sealing pipe ends during plumbing installation or repair.
BACKGROUND TO THE INVENTION
In plumbing, it is often necessary to seal pipe ends. This may be temporary, such as after the first fix when copper pipes have been installed, but before the second fix when baths, sinks and other appliances are installed. It is necessary to seal pipes to prevent detritus entering the pipe through an uncapped end while other work is performed, and to allow the plumbing system to be pressurised to test for leaks. Sometimes, redundant pipes need to be permanently sealed.
To seal pipes, low-cost disposable cap ends are often employed. Cap ends comprise a metal or plastic housing having a single opening for sealably receiving the pipe end. They are typically attached to the pipe end by a compression fitting, a push fit fitting, for example, a John Guest Speedfit (RTM) connector or soldering. A problem of existing end caps is that there is no indication to someone inspecting the pipe of whether or not the pipe is live, ie has pressured water inside.
It is necessary to pressurise all new plumbing systems on installation to test for leaks. This is generally done at an early stage in the construction process. To pressure test, the system is pressurised and a pressure gauge is connected to the system. If a leak is present, the pressure gauge reading will gradually reduce as water escapes the system. Locating a leak, if present, may require a pressure gauge to be connected at a variety of different points to isolate the leaking part of the system. As pressure gauges are relatively complex, high cost components, this typically involves a single gauge being connected sequentially to different parts of the system. This process is labour intensive and time consuming.
It is an object of the present invention to provide apparatus for sealing pipe ends which mitigates or reduces some of the aforementioned problems.
STATEMENT OF INVENTION
According to a first aspect of the present invention, there is provided a pressure indicator cap for a pipe end, comprising: an indicator element having a first position for indicating that the pipe is not pressurised, and a second position for indicating that the pipe is pressurised; a housing including a first opening for receiving the indicator element, and a second opening for connecting to the pipe end in a fluid-tight manner; biasing means for biasing the indicator element into the first position; and a diaphragm forming a fluid-tight seal between the first opening and the second opening and being arranged to move the indicator element from the first position to the second position when pressure is exerted on the diaphragm from the pipe.
The pressure indicator cap may be used to seal a free pipe end, for example between first fix and second fix during a building project. The housing is placed over the pipe end and the housing and diaphragm form a seal over the pipe end. If the pipe is then pressurised, for example to check for leaks, the water pressure in the pipe is exerted on the diaphragm, causing the indicator element to move from the first position to the second position. In the second position, the indicator element provides a visual indication that there is water pressure in the pipe. The biasing means ensures that this indication is only provided when water pressure is present in the pipe; when the pressure is removed, the biasing means causes the indicator element to move to the second position.
The pressure indicator cap may therefore be used to indicate which pipes are pressurised and which are not. This can provide a check that pipe connections have been installed correctly, as pressure may be introduced at one point in the system and pressure indicator caps installed at any connected point will indicate pressure, while pressure indicator caps at other points will not. The pressure indicator cap may also be used to identify leaks in the system, as a leak will cause the pressure to drop and the indicator cap will eventually indicate that pressure has fallen below a threshold set by the biasing means.
In the first position, the indicator element may be entirely within the housing. This conceals the indicator element when the pipe is not pressurised, providing a visual indication that the pipe is not pressurised.
In the second position, at least a part of the indicator element may protrude from the housing. This provides a visual indication that the pipe is pressurised.
The indicator element may be a pin. This allows the indicator element to slide axially in the housing between the first and second positions in response to pressure in the pipe, providing little resistance to actuation by either the diaphragm or the biasing means.
The housing may comprise a tube portion for receiving the pipe end and a cap portion disposed across an end of the tube portion. The tube portion abuts and is joined to the pipe, and the cap portion provides a surface for the biasing means to bear against, and a supporting structure for the indicator element.
The cap portion may comprise a through-aperture for receiving the indicator element. The indicator element can slide in the through-aperture between the first position and the second position.
The housing may also include an inner tube within the tube portion, a proximal end of the inner tube being connected to the cap portion and the pin being at least partially received in the inner tube. The inner tube provides a support structure for the diaphragm.
The diaphragm may be disposed across a distal end of the inner tube.
A sheath may be provided around the distal end of the inner tube, the diaphragm being held between the inner tube and the sheath, and the sheath including a through-aperture for allowing fluid to flow from the pipe to the diaphragm. The sheath retains the diaphragm on the inner tube while allowing water pressure from the pipe to be exerted on the diaphragm.
The biasing means may be a spring. Alternatively, the biasing means may be provided by the diaphragm itself, the diaphragm being resilient.
The housing may include a connecting means for fluid-tight connection to the pipe end. The connecting means may be one of a compression fitting; a John Guest Speedfit (RTM) connector; a solder ring fitting; or other push fit fitting.
A resilient O-ring seal may be disposed within the housing. This provides a seal between the housing and the pipe so that water cannot leak out from the pipe and pressure is retained in the pipe and exerted on the diaphragm.
The diaphragm may include a collapsible portion. This allows the diaphragm to be compactly accommodated within the housing in the first position, while providing a larger range of movement to the pressure indicating element.
BRIEF DESCRIPTION OF THE DRAWINGS
For a better understanding of the present invention, and to show more clearly how it may be carried into effect, reference will now be made by way of example only to the accompanying drawings, in which:
Figure 1 shows a cross-sectional side view of a pressure indicator cap installed on a pipe end in a first position;
Figure 2 shows a cross-sectional side view of the pressure indicator cap of Figure 1 installed on a pipe end in a second position;
Figure 3 shows a perspective view of the pressure indicator cap of Figure 1 installed on a pipe end in a first position;
Figure 4 shows a perspective view of the pressure indicator cap of Figure 1 installed on a pipe end in a second position; and
Figure 5 shows a cross-sectional side view of a second embodiment of a pressure indicator cap.
DESCRIPTION OF PREFERRED EMBODIMENTS
Referring firstly to Figure 1, a pressure indicator cap is indicated generally at 10.
The pressure indicator cap 10 includes a housing 12. The housing 12 comprises a tube portion 14 and a cap portion 16. The tube portion 14 is a cylindrical body. The diameter of the tube portion 14 reduces in a stepwise manner along an axial extent of the tube portion. The tube portion 14 defines an interior volume 20 for receiving a pipe end.
The cap portion 16 is a circular body extending across an end of the tube portion 14. The other end of the tube portion 14 forms an opening. The cap portion 16 includes a through-aperture 18. The tube portion 14 and the cap portion 16 are integrally formed as a single unit. The tube portion 14 and the cap portion 16 may be formed of plastics or of brass.
An inner tubing portion 22 is disposed within the interior volume 20 of the tube portion 14. The inner tubing portion 22 is a cylindrical body defining a hollow interior volume. The inner tubing portion 22 is coaxial with the tube portion 14. The inner tubing portion 22 is joined to the cap portion 14 at a proximal end of the inner tubing portion 22. The inner tubing portion 22 is integrally formed with the cap portion 16 and tube portion 14 as a single unit. The aperture 18 communicates with the interior volume of the inner tubing section 22.
A pressure indicator element 24 is disposed within the aperture 18. The pressure indicator element 24 is a cylindrical pin. The diameter of the pin matches the diameter of the aperture 18 to produce a close fit. The pressure indicator element 24 has a foot 26 at one end. The foot 26 is a portion of the pressure indicator element 24 of increased diameter. The diameter of the foot 26 is larger than the diameter of the aperture 18. The foot 26 is disposed within the interior volume 20, and in this embodiment is disposed within the interior volume of the inner tubing portion 22. The length of the pressure indicator element 24 is less than the distance between an outer surface of the cap portion and a distal end of the inner tubing portion 22. That is, the pressure indicator element 24 may be entirely housed within the cap portion 16 and the inner tubing portion 22.
A seat 28 is provided on an interior surface of the cap portion 16 for receiving a spring. The seat 28 is an annular recess provided around the circumference of the aperture 18. In this embodiment, the seat 28 is defined by a proximal portion of the inner tubing portion 22 of increased wall thickness.
A biasing means 30 is provided. The biasing means 30 is a helical spring disposed around the circumference of the pressure indicator element 24. The spring 30 is retained between the cap portion 16 and the pressure indicator element 24. The spring 30 biases the pressure indicator element 24 away from the cap portion 16, that is, towards the pipe. In this embodiment, the spring 30 is retained between the seat 28 and the foot 26 of the pressure indicator element 24.
A diaphragm 32 is provided within the interior volume 20. The diaphragm 32 extends across the distal end of the inner tubing portion 22. The diaphragm 22 forms a fluidtight barrier between the opening of the housing 12 and the aperture 18. In use, the diaphragm 22 forms a fluid tight barrier between the interior of the pipe and the aperture 18. The diaphragm 32 has a peripheral portion which extends around an exterior of the distal end of the inner tubing portion 22. The diaphragm 32 has a collapsible central portion which is accommodated within the distal end of the inner tubing portion 22.
A sheath 34 is provided around the inner tubing portion 22. The sheath 34 extends around the distal end of the inner tubing portion 22. The sheath 34 forms a tight fit around the inner tubing portion 22. The peripheral portion of the diaphragm 32 is retained between the inner tubing portion 22 and the sheath 34. In this embodiment, the distal end of the inner tubing portion 22 includes a circumferential shoulder on its outer edge for receiving the peripheral portion of the diaphragm 32.
An aperture 35 is provided in the sheath 34. The aperture 35 communicates between the opening of the housing 12 and the interior volume of the inner tubing 22.
An O-ring 36 is provided around an inner circumference of the tube portion 14. The Oring 36 is formed of rubber.
A pipe end 38 is received in the interior volume of the tube portion 14. The pipe end 38 is fluid-tightly held by a connecting means 40. In this embodiment, the connecting means 40 is a Speedfit (RTM) connector such as is known in the art. The connecting means 40 is disposed at the opening of the tube portion 14.
Referring now to Figure 2, the pressure indicator cap 10 is shown in a second position. In the second position, the diaphragm 32 is extended. In this embodiment, the collapsible mid portion of the diaphragm 32 is extended, though in other embodiments, the diaphragm 32 may be resilient and stretch.
An end of the pressure indicator element 24 protrudes from the cap portion 16, and the foot 26 of the pressure indicator element 24 is disposed closer to the cap portion 16 than in the first position. The spring 30 is compressed.
The diaphragm 32 at least partially abuts the foot 26 portion of the pressure indicator element 24. The pipe end 38 is filled with pressurised fluid, which exerts pressure on the diaphragm 32 from the opening of the tube portion and urges the diaphragm 32 against the pressure indicator element 24.
Referring now to Figure 3, the pressure indicator cap 10 is shown in the first position. The pressure indicator element 24 is entirely housed within the housing 12. The end of the pressure indicator element 24 is substantially flush with the outer surface of the cap portion 16.
Referring now to Figure 4, the pressure indicator cap 10 is shown again in the second position. The pressure indicator element 24 protrudes from the housing 12, providing a visual indication that the pipe end contains pressurised fluid.
In use, the pressure indicator cap 10 is fitted to a pipe end 38, which is received in the interior volume 20 of the housing 12. In this embodiment, the pipe end 38 abuts an interior surface of the cap portion 16. The pipe end 38 is held tightly to form a fluid tight seal by the connecting means 40. The O-ring 36 is compressed between the tube portion 14 and the pipe end 38.
Referring now to Figure 5, a second embodiment of a pressure indicator cap is indicated generally at 100. The pressure indicator cap 100 includes a housing 102. The housing 102 is similar to the housing 12 of the first embodiment 10, having a tube portion 104 and a cap portion 106.
The cap portion 106 is a circular body extending across an end of the tube portion 104. The other end of the tube portion 104 forms an opening. The tube portion 104 and the cap portion 106 are integrally formed as a single unit. The tube portion 104 and the cap portion 106 may be formed of a plastics material or of brass.
The cap portion 106 has an inward facing frusto-conical exterior surface, that is, a conical depression is provided on the outer surface of the cap portion 106. A throughaperture 112 is provided at the centre of the conical depression.
The tube portion 104 is a cylindrical body. The diameter of the tube portion 104 reduces in a stepwise manner along an axial extent of the tube portion. The tube portion 104 defines an interior volume 120 for receiving a pipe end.
The second embodiment 100 includes an outer sheath 108. The outer sheath 108 extends around the exterior of the housing 102 and has an opening at one end for receiving the housing 102. The housing 102 includes a flange 110 around one end for abutting an edge of the opening of the outer sheath 108. The outer sheath 108 includes an aperture 109. The aperture 109 is disposed in an end portion of the outer sheath 108. The aperture 109 aligns with the aperture 112 of the housing 102.
A fluid-tight seal is obtained between the outer sheath 108 and the housing 102.
A pressure indicator element 114 is disposed within the aperture 112. The pressure indicator element 114 is a cylindrical pin. The diameter of the pin matches the diameter of the aperture 112 to produce a close fit. The length of the pressure indicator element 114 is equal to the distance between an outer surface of the outer sheath 108 and an inner surface of the cap portion 106. That is, the pressure indicator element 114 may be entirely housed within and between the outer sheath 108 and the cap portion 106.
A biasing means 116 is provided. In this embodiment, the biasing means is provided by a diaphragm. The diaphragm 116 is of conical shape and conforms to the conical depression in the outer surface of the cap portion 106. The diaphragm 116 is fluidtightly joined at its edges to a corner of the outer sheath 108. The diaphragm 116 is joined at its centre to an end of the pressure indicator element 114. In this embodiment, the diaphragm 116 and the pressure indicator element 114 are integrally formed. The diaphragm 116 is resilient.
In its relaxed state, the diaphragm 116 sits in the conical depression of the cap portion 116, holding the pressure indicator element 114 adjacent the aperture 112, in which position the other end of the pressure indicator element 114 is flush with an exterior surface of the outer sheath 108.
The diaphragm 116 forms a fluid-tight barrier between the opening of the housing 102 and the aperture 109. In use, the diaphragm 116 forms a fluid-tight barrier between the interior of the pipe and the aperture 109.
An O-ring 118 is provided around an inner circumference of the tube portion 14.
In use, a pipe end (not shown) is received in the interior volume of the tube portion 14. The pipe end is fluid-tightly held in the tube portion 104 and compresses the O-ring 118. When the pipe is empty, the pressure indicator cap occupies the first position as shown in Figure 5 and described above. When pressurised fluid is present in the pipe, the pressure of the fluid is exerted on the diaphragm 116 and an end of the pressure indicator element 114, urging the pressure indicator element 114 through the aperture 109. The diaphragm 116 deforms and compresses towards the outer sheath 108 to accommodate this, coming away from the outer surface of the cap portion 106.
The pressure indicator element protrudes from the outer sheath 108, providing a visual indication that pressurised fluid is present in the pipe.
The pressure indicator caps of the invention provide a simple way of sealing a pipe end and providing a visual indication of whether there is pressure in the pipe. If the indicator element or nipple is showing, then there is pressure in the pipe.
These embodiments are provided by way of example only, and various changes and modifications will be apparent to persons skilled in the art without departing from the scope of the present invention as defined by the appended claims.
Claims (15)
1. A pressure indicator cap for a pipe end, comprising:
an indicator element having a first position for indicating that the pipe is not pressurised, and a second position for indicating that the pipe is pressurised;
a housing including a first opening for receiving the indicator element, and a second opening for connecting to the pipe end in a fluid-tight manner;
biasing means for biasing the indicator element into the first position; and a diaphragm forming a fluid-tight seal between the first opening and the second opening and being arranged to move the indicator element from the first position to the second position when pressure is exerted on the diaphragm from the pipe.
2. A pressure indicator cap as claimed in claim 1, in which in the first position, the indicator element is entirely within the housing.
3. A pressure indicator cap as claimed in claim 1 or claim 2, in which in the second position, at least a part of the indicator element protrudes from the housing.
4. A pressure indicator cap as claimed in any preceding claim, in which the indicator element is a pin.
5. A pressure indicator cap as claimed in any preceding claim, in which the housing comprises a tube portion for receiving the pipe end and a cap portion disposed across an end of the tube portion.
6. A pressure indicator cap as claimed in any claim 5, in which the cap portion comprises a through-aperture for receiving the indicator element.
7. A pressure indicator cap as claimed claim 5 or claim 6, in which the housing also includes an inner tube within the tube portion, a proximal end of the inner tube being connected to the cap portion and the pin being at least partially received in the inner tube.
8. A pressure indicator cap as claimed in claim 7, in which the diaphragm is disposed across a distal end of the inner tube.
9. A pressure indicator cap as claimed in claim 7 or claim 8, in which a sheath is provided around the distal end of the inner tube, the diaphragm being held between the inner tube and the sheath, and the sheath including a throughaperture for allowing fluid to flow from the pipe to the diaphragm.
10. A pressure indicator cap as claimed in any preceding claim, in which the biasing means is a spring.
11. A pressure indicator cap as claimed in any preceding claim, in which the housing includes a connecting means for fluid-tight connection to the pipe end.
12. A pressure indicator cap as claimed in any preceding claim, in which the connecting means is one of a compression fitting; a John Guest Speedfit (RTM) connector; a solder ring fitting; a push fit fitting.
13. A pressure indicator cap as claimed in any preceding claim, in which a resilient O-ring seal is disposed within the housing.
14. A pressure indicator cap as claimed in any preceding claim, in which the diaphragm includes a collapsible portion.
15. A pressure indicator cap as claimed in any one of claims 1 to 8, in which the diaphragm is resilient and provides the biasing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1812426.3A GB2575991B (en) | 2018-07-31 | 2018-07-31 | Pressure indicator cap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1812426.3A GB2575991B (en) | 2018-07-31 | 2018-07-31 | Pressure indicator cap |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB201812426D0 GB201812426D0 (en) | 2018-09-12 |
| GB2575991A true GB2575991A (en) | 2020-02-05 |
| GB2575991B GB2575991B (en) | 2022-07-20 |
Family
ID=63518306
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1812426.3A Active GB2575991B (en) | 2018-07-31 | 2018-07-31 | Pressure indicator cap |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2575991B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023004462A1 (en) * | 2021-07-29 | 2023-02-02 | Bos Fabrication Engineering Services Pty Ltd | Test cap |
| EP4439031A1 (en) * | 2023-03-28 | 2024-10-02 | Exel Industries | Indicator for indicating the occurrence of a pressurized fluid leak in a vent chamber of a pressurized fluid apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997044610A1 (en) * | 1996-05-20 | 1997-11-27 | Gordon Sanderson | Access plug and method |
| US20110278291A1 (en) * | 2010-05-17 | 2011-11-17 | Taylor Innovations, L.L.C. | Protection Cap Assembly with Leak Detection Capability for a Pressiruzed Valve |
| KR20160032626A (en) * | 2014-09-16 | 2016-03-24 | 삼성중공업 주식회사 | Blind flanges for pipe hydraulic test |
| CN106481927A (en) * | 2016-12-16 | 2017-03-08 | 珠海格力电器股份有限公司 | Capping device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2644024C (en) * | 2006-03-03 | 2016-01-26 | Universite Laval | Method and apparatus for spatially modulated electric field generation and electro-optical tuning using liquid crystals |
-
2018
- 2018-07-31 GB GB1812426.3A patent/GB2575991B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997044610A1 (en) * | 1996-05-20 | 1997-11-27 | Gordon Sanderson | Access plug and method |
| US20110278291A1 (en) * | 2010-05-17 | 2011-11-17 | Taylor Innovations, L.L.C. | Protection Cap Assembly with Leak Detection Capability for a Pressiruzed Valve |
| KR20160032626A (en) * | 2014-09-16 | 2016-03-24 | 삼성중공업 주식회사 | Blind flanges for pipe hydraulic test |
| CN106481927A (en) * | 2016-12-16 | 2017-03-08 | 珠海格力电器股份有限公司 | Capping device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023004462A1 (en) * | 2021-07-29 | 2023-02-02 | Bos Fabrication Engineering Services Pty Ltd | Test cap |
| EP4439031A1 (en) * | 2023-03-28 | 2024-10-02 | Exel Industries | Indicator for indicating the occurrence of a pressurized fluid leak in a vent chamber of a pressurized fluid apparatus |
| FR3147368A1 (en) * | 2023-03-28 | 2024-10-04 | Exel Industries | Indicator for indicating the occurrence of a leak of pressurized fluid in a vent chamber of a pressurized fluid device |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2575991B (en) | 2022-07-20 |
| GB201812426D0 (en) | 2018-09-12 |
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