GB1602193A - Water fittings including anti-syphon devices - Google Patents

Water fittings including anti-syphon devices Download PDF

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Publication number
GB1602193A
GB1602193A GB2833177A GB2833177A GB1602193A GB 1602193 A GB1602193 A GB 1602193A GB 2833177 A GB2833177 A GB 2833177A GB 2833177 A GB2833177 A GB 2833177A GB 1602193 A GB1602193 A GB 1602193A
Authority
GB
United Kingdom
Prior art keywords
valve
valve member
passageway
tap
fitting
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.)
Expired
Application number
GB2833177A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BARKING GROHE Ltd
Original Assignee
BARKING GROHE Ltd
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 BARKING GROHE Ltd filed Critical BARKING GROHE Ltd
Priority to GB2833177A priority Critical patent/GB1602193A/en
Publication of GB1602193A publication Critical patent/GB1602193A/en
Expired legal-status Critical Current

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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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/06—Devices, e.g. valves, for venting or aerating enclosures for aerating only
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/104—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves using a single check valve
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E03C1/10—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves
    • E03C1/108—Devices for preventing contamination of drinking-water pipes, e.g. means for aerating self-closing flushing valves having an aerating valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Description

(54) WATER FITTINGS INCLUDING ANTI-SYPHON DEVICES (71) We, BARKING - GROHE LIMITED formerly BARKING BRASSWARE COMPANY LIMITED, a British Company, of 5-13 River Road, Barking, Essex, IG11 OHD do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: This invention relates to water fittings including anti-syphon devices and is particularly, but not exclusively, concerned with anti-syphon devices fitted on water taps, such as garden taps.
According to the invention there is provided a water fitting including an internal passageway between an inlet and an outlet and a control valve movable between a position in which it closes the passageway, the fitting also including a port defining an opening between the passageway and the atmosphere, and a valve member which is movable, upon reduction of pressure in the passageway to below atmospheric, from a first position in which the valve member closes the port but does not close the passageway to a second position in which the valve member closes the passageway but does not close the port.
The fitting may include an intemal aperture which forms part of the passageway and over which the said valve member, seats, when in the second position, to close the passageway. The said valve member may be provided with two closure members for closing the port and the passageway respectively.
The fitting may include a housing in which the passageway and the port are defined and and which is co-operable with the said valve member to guide movement of the latter between the first and second positions. The said valve member may include a guide portion which is slidably mounted in the port.
The said valve member may be resiliently biassed towards the first position.
The fitting may be externally threaded around the outlet, for example to enable a garden hose to be attached.
The control valve may be a non-return valve.
The control valve may include a closure member which is resiliently biassed towards a closed position in which it closes the passageway and on which, in use, pressure at the inlet acts to urge the closure member into a position in which it does not close the passageway, and an operating member movable between a position in which the control valve closure member is held in the closed position by the operating member and a position in which the control valve closure member is not so held.
The control valve may be manually-operable (for example a tap).
By way of example only, an illustrative embodiment of the invention will now be described with reference to the accompanying drawing which is a generally sectional elevation of a garden water tap.
The garden water tap shown in the drawings comprises a housing 1 having an internal passageway 4 therethrough between an inlet 2 and an outlet 3, an anti-syphon valve generally designated 8 and a manually-operated valve generally designated 5.
The housing is screw-threaded externally around the inlet 2 for attachment to a water pipe and screw-threaded around the outlet 3 to enable a garden hose or a similar water fitting to be attached.
The manually-operated valve 5 has a head nut 6 threadably engaged on the casing 1 and receives an operating member 7 screw threadingly engaging the head nut 6. Attached to the top of the operating member 7 is a handle. A nut 9 and washer 10 are located between operating member 7 and the head nut 6 to prevent water leakage therebetween. A shroud 11 is provided over the head nut 6.
The lower end of the operating member 7 has a bore 12 in which a tubular extension 13 of a valve member 14 is slidably mounted. A spring 15 is compressed between the end of the bore 12 and the body part of the valve member 14. The valve member 14 has an externally threaded extension around which a closure member 16 is received and clamped by a nut 17. In the position of the valve 7 shown in the drawing the valve is closed and the closure member 16 seats over an aperture 18 in the housing to close the internal passageway 4.
The anti-syphon valve 8 comprises a gener ally tubular insert 19 screw-threadingly received in the housing 1 downstream of the valve 5, and a valve member 20. The valve member 20 has a fluted guide portion 21 at one end slidably mounted in the tubular insert 19 and a pair of closure members 22 and 23 mounted on opposite faces of the other end of the valve member.
As can be seen from the drawing, closure member 22 is of semi-spherical or domed form. In the position shown in the drawing a port 25 formed by the interior of the insert 19 is closed by the closure member 23. However upon sliding movement of the valve member 20 towards the valve 5 the port 25 is opened and the closure member 22 closes over an aperture 24 in the housing 1.
In use the inlet 2 of the tap is connected to a water pipe which may for example be connected to the water main. The outlet 3 may be attached to a garden hose, for example, or it may not be attached to anything. With the valve 5 in the position shown in the drawing the internal passage 4 is closed by the closure member 16 and no water flows from the outlet 3. Gravity acts on the valve member 20 to maintain it in the position shown in the drawing so that the port 25 is closed.
In order to open the tap a user rotates the handle of the tap in the normal manner to raise the operating member 7. Since the valve member 14 is not attached to the operating member 7 this does not automatically raise the valve member 14. However, assuming the water pressure at the inlet 2 is normal, the pressure on the closure member 16 raises the valve member 14 against the bias of the spring 15 thus opening the passageway 4 so that water flows from the outlet 3. The valve member 20 is maintained in the position shown in the drawing by gravity and also by the water pressure in the passageway 4 acting on the face of the closure member 22.
In order to close the tap the user rotates the handle of the tap back to its original position causing the operating member 7 to press down on the valve member 14 to press the closure member 16 over the aperture 18.
In a conventional tap, if while the tap is turned on there is a reduction in the water pressure at the inlet side of the tap below atmospheric pressure, the water may syphon back through the tap from the outlet to the inlet.
Such a reduction in pressure may for example occur when the water main bursts.
In the tap shown in the drawing such a reduction in pressure has two effects: it causes the valve member 20 to be raised by the atmospheric pressure acting on the valve member so that the closure member 22 seats over the aperture 24 thus closing the internal passageway 4 opening the outlet 3 of the tap to atmospheric pressure and admitting air into this part of the tap; also it removes the water pressure acting on the closure member 16 which pressure maintains the closure member 16 away from the aperture 18 so that upon the eeduction of pressure the closure member 16 is biassed by the spring 15 to rest over the aperture 18 thus closing the passageway 4.
If the pressure at the inlet is increased above atmospheric the valve member 14 will return to its open position (assuming the tap is still turned on) and the valve member 20 will retum to the position shown in the drawing.
The water tap described heretofore thus provides two separate systems for preventing back syphoning of water into the water main in the event of a drop in pressure below atmospheric at the inlet of the tap. Each system is simple and reliable. The provision of an anti-syphoning device is particularly important in the case of a garden tap which may for example be connected to a hose the other end of which is immersed in contaminated or chamically treated water such as for example water in a swimming pool.
While one particular embodiment of the invention has been described it will be clear that many modifications may be made. For example, a compression spring may be provided between the valve member 20 and the aperture 24 to provide additional bias of the valve member 20 to the position shown in the drawing.
The construction of the non-return valve 5 may be modified. The valve 5 need not be a non-return valve and may be of any conventional form.
In addition, it is not essential to employ a slidably mounted valve member 14 spring-urged into a closed position. Instead, the tap may incorporate a conventional washer plate assembly or one that is fixed to the valve operating member.
WHAT WE CLAIM IS: 1. A water fitting including an internal passageway between an inlet and an outlet, and a control valve movable between a position in which it closes the passageway and a position in which it does not close the passageway, the fitting also including a port defining an opening between the passageway and the atmosphere, and a valve member which is movable, upon reduction of pressure in the passageway to below atmospheric, from a first position in which the valve member closes the port but does not close the passageway to a second position in which the valve member closes the passageway but does not close the port.
2. A fitting as claimed in Claim 1, including an internal aperture which forms part of the passageway and over which the said valve member seats, when in the second position, to close the passageway.
3. A fitting as claimed in Claim 1 or Claim 2, in which the said valve member is provided with two closure members for closing the port and the passageway respectively.
4. A fitting as claimed in any one of the preceding claims, including a housing in which the passageway and the port are defined and which is co-operable with the said valve member to guide movement of the latter between the first
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (12)

**WARNING** start of CLMS field may overlap end of DESC **. a valve member 20. The valve member 20 has a fluted guide portion 21 at one end slidably mounted in the tubular insert 19 and a pair of closure members 22 and 23 mounted on opposite faces of the other end of the valve member. As can be seen from the drawing, closure member 22 is of semi-spherical or domed form. In the position shown in the drawing a port 25 formed by the interior of the insert 19 is closed by the closure member 23. However upon sliding movement of the valve member 20 towards the valve 5 the port 25 is opened and the closure member 22 closes over an aperture 24 in the housing 1. In use the inlet 2 of the tap is connected to a water pipe which may for example be connected to the water main. The outlet 3 may be attached to a garden hose, for example, or it may not be attached to anything. With the valve 5 in the position shown in the drawing the internal passage 4 is closed by the closure member 16 and no water flows from the outlet 3. Gravity acts on the valve member 20 to maintain it in the position shown in the drawing so that the port 25 is closed. In order to open the tap a user rotates the handle of the tap in the normal manner to raise the operating member 7. Since the valve member 14 is not attached to the operating member 7 this does not automatically raise the valve member 14. However, assuming the water pressure at the inlet 2 is normal, the pressure on the closure member 16 raises the valve member 14 against the bias of the spring 15 thus opening the passageway 4 so that water flows from the outlet 3. The valve member 20 is maintained in the position shown in the drawing by gravity and also by the water pressure in the passageway 4 acting on the face of the closure member 22. In order to close the tap the user rotates the handle of the tap back to its original position causing the operating member 7 to press down on the valve member 14 to press the closure member 16 over the aperture 18. In a conventional tap, if while the tap is turned on there is a reduction in the water pressure at the inlet side of the tap below atmospheric pressure, the water may syphon back through the tap from the outlet to the inlet. Such a reduction in pressure may for example occur when the water main bursts. In the tap shown in the drawing such a reduction in pressure has two effects: it causes the valve member 20 to be raised by the atmospheric pressure acting on the valve member so that the closure member 22 seats over the aperture 24 thus closing the internal passageway 4 opening the outlet 3 of the tap to atmospheric pressure and admitting air into this part of the tap; also it removes the water pressure acting on the closure member 16 which pressure maintains the closure member 16 away from the aperture 18 so that upon the eeduction of pressure the closure member 16 is biassed by the spring 15 to rest over the aperture 18 thus closing the passageway 4. If the pressure at the inlet is increased above atmospheric the valve member 14 will return to its open position (assuming the tap is still turned on) and the valve member 20 will retum to the position shown in the drawing. The water tap described heretofore thus provides two separate systems for preventing back syphoning of water into the water main in the event of a drop in pressure below atmospheric at the inlet of the tap. Each system is simple and reliable. The provision of an anti-syphoning device is particularly important in the case of a garden tap which may for example be connected to a hose the other end of which is immersed in contaminated or chamically treated water such as for example water in a swimming pool. While one particular embodiment of the invention has been described it will be clear that many modifications may be made. For example, a compression spring may be provided between the valve member 20 and the aperture 24 to provide additional bias of the valve member 20 to the position shown in the drawing. The construction of the non-return valve 5 may be modified. The valve 5 need not be a non-return valve and may be of any conventional form. In addition, it is not essential to employ a slidably mounted valve member 14 spring-urged into a closed position. Instead, the tap may incorporate a conventional washer plate assembly or one that is fixed to the valve operating member. WHAT WE CLAIM IS:
1. A water fitting including an internal passageway between an inlet and an outlet, and a control valve movable between a position in which it closes the passageway and a position in which it does not close the passageway, the fitting also including a port defining an opening between the passageway and the atmosphere, and a valve member which is movable, upon reduction of pressure in the passageway to below atmospheric, from a first position in which the valve member closes the port but does not close the passageway to a second position in which the valve member closes the passageway but does not close the port.
2. A fitting as claimed in Claim 1, including an internal aperture which forms part of the passageway and over which the said valve member seats, when in the second position, to close the passageway.
3. A fitting as claimed in Claim 1 or Claim 2, in which the said valve member is provided with two closure members for closing the port and the passageway respectively.
4. A fitting as claimed in any one of the preceding claims, including a housing in which the passageway and the port are defined and which is co-operable with the said valve member to guide movement of the latter between the first
and second positions.
5. A fitting as claimed in any one of the preceding claims, in which the said valve member includes a guide portion which is slidably mounted in the port.
6. A fitting as claimed in any one of the preceding claims, in which the said valve member is resiliently biassed towards the first position.
7. A fitting as claimed in any one of the preceding claims, the fitting being externally threaded around the outlet.
8. A fitting as claimed in any one of the preceding claims, in which the control valve is a non-return valve.
9. A fitting as claimed in any of the preceding claims in which the control valve includes a closure member which is resiliently biassed towards a closed position in which it closes the passageway and on which, in use, pressure at the inlet acts to urge the closure member into a position in which it does not close the passageway, and an operating member movable between member is held in the closed position by the operating member and a position in which the control valve closure member is not so held.
10. A fitting as claimed in any one of the preceding claims, in which the control valve is manually-operable.
11. A fitting as claimed in any one of the preceding claims, in which the said valve member is part of an anti-syphon valve substantially as described herein with reference to, and as shown in, the accompanying drawing.
12. Awater fitting substantially as described herein with reference to, and as shown in, the accompanying drawings.
GB2833177A 1978-05-25 1978-05-25 Water fittings including anti-syphon devices Expired GB1602193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2833177A GB1602193A (en) 1978-05-25 1978-05-25 Water fittings including anti-syphon devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2833177A GB1602193A (en) 1978-05-25 1978-05-25 Water fittings including anti-syphon devices

Publications (1)

Publication Number Publication Date
GB1602193A true GB1602193A (en) 1981-11-11

Family

ID=10273980

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2833177A Expired GB1602193A (en) 1978-05-25 1978-05-25 Water fittings including anti-syphon devices

Country Status (1)

Country Link
GB (1) GB1602193A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230587A (en) * 1989-06-21 1990-10-24 Conex Sanbra Limited Bib-cocks
WO1994001706A1 (en) * 1992-07-10 1994-01-20 Scama Cooler Pty. Ltd. Valve assembly with backflow prevention and atmospheric vacuum breaker devices
US5372158A (en) * 1993-09-30 1994-12-13 Shop Vac Corporation Valve with backflow preventer
WO2013141795A1 (en) * 2012-03-19 2013-09-26 Ab Durgo A valve arrangement
EP2370719A4 (en) * 2008-11-26 2015-11-11 Gary Yewdall WATER OUTPUT DEVICE

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2230587A (en) * 1989-06-21 1990-10-24 Conex Sanbra Limited Bib-cocks
GB2230587B (en) * 1989-06-21 1991-05-22 Conex Sanbra Limited Bib-cocks
WO1994001706A1 (en) * 1992-07-10 1994-01-20 Scama Cooler Pty. Ltd. Valve assembly with backflow prevention and atmospheric vacuum breaker devices
GB2283300A (en) * 1992-07-10 1995-05-03 Scama Cooler Pty Ltd Valve assembly with backflow prevention and atmospheric vacuum breaker devices
US5372158A (en) * 1993-09-30 1994-12-13 Shop Vac Corporation Valve with backflow preventer
EP2370719A4 (en) * 2008-11-26 2015-11-11 Gary Yewdall WATER OUTPUT DEVICE
WO2013141795A1 (en) * 2012-03-19 2013-09-26 Ab Durgo A valve arrangement

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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee