EP0977924A1 - Discharge valve apparatus - Google Patents
Discharge valve apparatusInfo
- Publication number
- EP0977924A1 EP0977924A1 EP98917420A EP98917420A EP0977924A1 EP 0977924 A1 EP0977924 A1 EP 0977924A1 EP 98917420 A EP98917420 A EP 98917420A EP 98917420 A EP98917420 A EP 98917420A EP 0977924 A1 EP0977924 A1 EP 0977924A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- housing
- pilot valve
- fluid
- outlet
- 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 abstract description 22
- 239000003570 air Substances 0.000 claims abstract description 8
- 230000002706 hydrostatic effect Effects 0.000 claims abstract description 7
- 239000012080 ambient air Substances 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 26
- 238000007654 immersion Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 244000273618 Sphenoclea zeylanica Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D1/00—Water flushing devices with cisterns ; Setting up a range of flushing devices or water-closets; Combinations of several flushing devices
- E03D1/02—High-level flushing systems
- E03D1/14—Cisterns discharging variable quantities of water also cisterns with bell siphons in combination with flushing valves
- E03D1/142—Cisterns discharging variable quantities of water also cisterns with bell siphons in combination with flushing valves in cisterns with flushing valves
Definitions
- the invention relates to a discharge valve apparatus and is primarily intended to provide a light action, easily operable, fast flowing valve for emptying or partly emptying cisterns and other types of liquid storage containers. It is particularly, although not exclusively, applicable to being used to reduce the amount of water used for flushing domestic lavatories or W.C .s.
- non-siphon or direct type valves generally have a valve plate or member which covers and seals the outlet to prevent water from escaping unintentionally.
- Both the siphon and the direct type flush valve have a threaded outlet pipe which extends downwards through the bottom of the cistern into which it is fixed by a bulkhead fitting. It is then connected to the lavatory pan either directly or by a short length of pipe.
- Known discharge valve apparatus is usually suitable for use on medium and high performance W C pans, but are not so efficient on low performance pans because water rises inside a hollow pilot valve stem thereby preventing air from entering above a valve thereof in a short flush mode This then prevents a desired rapid re-seating of the piston so that a short flush cannot satisfactorily be obtained with concomitant waste of water
- the means to provide ambient flow may comprise an annular passage intermediate the length of and exteriorly of the pilot valve. This provides a relatively simple construction and assembly.
- the annular passage may be exteriorly of a stem of the pilot valve. This provides for a compact construction, particularly where the intermediate annular passage may terminate at a seal of the pilot valve in one operating position.
- the splines may be carried by the boss, and for preference of construction may be formed integrally with the boss.
- pilot valve stem There” may be five webs equiangularly spaced round the pilot valve stem. This provides for positive limitation of the stroke of the pilot valve.
- an overflow pipe secured to the housing by a coupling nut and seal arrangement.
- the overflow pipe may have means to provide a desired length thereof. This provides for a varying overflow capacity, particularly where the means may comprise a plurality of notches or zones of weakness spaced apart over the length of the overflow pipe, and which may allow that pipe to be cut to a desired length. This provides for ease of adjustment of the length of the overflow pipe.
- Fig. 2 is a transverse cross-section on the line II- II of Fig. 1A.
- discharge valve apparatus for immersion in and discharge of fluid, usually water, from a cistern (not shown) comprising a housing 2, a valve means or piston 3 in the housing 2 for cooperation with an outlet 4 from the housing 2 to prevent flow of fluid from the housing 2 and being movable to open the outlet 4 for flow of fluid therefrom, a pilot valve 5 which is operable to open a free flow between a chamber 6 of the housing 2 and the outlet 4 and means 7 to provide to provide passage of ambient air to the chamber 6, the arrangement being such that with a passage of air being maintained, hydrostatic forces acting on the underside of the valve reduce in proportion to the fluid level fall so that as the fluid falls to a desired level the weight of the valve 3 exceeds the upward forces whereby to allow the valve to descend and close the outlet 4.
- the compression spring 14 bearing between an annular upper (as viewed) shoulder seal 15 of the stem and an annular land 16 at the top of the housing 2 and which forms a roof of the housing, the land 16 extending downwardly, inwardly of the housing to provide a cylindrical boss 17 which bears on an annular seal 18 on an intermediate shoulder 19 of the stem 12.
- the spring 13 bears between the underside of the land 16 and the top of the valve 3, there being respective shoulders 20, 21 to keep it in place.
- the boss 17 is spaced from the stem to provide a passage which in turn provides means for allowing air to pass from the ambient atmosphere through space 21, defined by an upper extension 22 of the housing 2, to the chamber 6 in use.
- the upper extension 22 of the housing 2 provides a seating for an overflow tube 23 which is mounted on top of the extension via a seal 24 and by a releasable coupling nut 25 which is screwed into a thread at the top of the extension and tightens down by a flange 26 which bears on a rib or flange 27 of the overflow tube 23.
- space 21 means to limit the stroke of the pilot valve in the form of a plurality of webs 28, in the embodiment five, which are integral with the extension 22 and land 16 and have an upper surface which in the Fig. 1A position is engaged by the shoulder seal or collar 15 of the pilot valve stem.
- the guide means being in the form of ribs or splines 29 (in the embodiment four ribs), which are integrally formed with and project from the boss 17 and whilst providing clearance for reciprocation of the pilot valve stem 12, nevertheless guide it so that it does not cant during movement.
- the overflow pipe 23 is notched as shown by a series of spaced annular notches 30 or at least areas of decreased wall thickness and hence areas of weakness so the overflow height can be set by cutting the pipe 23 at a desired notch or area of weakness to provide a desired length of tube. Any water overflowing into the tube 23 escapes through aperture 31 (one of which is shown) in the valve stem 12 and hence through the outlet 4.
- the upper (as viewed) part 32 of the pilot valve stem is at least flush with the top of the overflow pipe 23 so that the operating mechanism is always accessible.
- the valve In use, in the Fig. 1A condition, with the valve 3 seated and the cistern filled, the valve is kept in the seated condition mainly by net downward hydrostatic forces acting on the upper annular area between the pilot stem 12 and the land 16 of the upper housing, the valve 6 being sealed in the housing by a centring ring 33. Other downward forces are due to water pressure on the seal 8, the weight of the valve 6 and a small amount of initial compression from the spring 13. The only upward force on the valve 6 in the seated condition (Fig. 1A) is due to the water pressure acting on the underneath of the valve in the annular space 34.
- the pilot valve stem 12 does not act as a contributor to these forces, as it is maintained in the closed position by the compression spring 14 acting on the land 16.
- the pilot valve stem 12 is depressed for a few seconds, usually 2 - 3 seconds to provide a depression of about 8.00 mm as shown in Fig. IB.
- This action separates the end of the boss 17 and the seal 18 enabling air to be drawn from the ambient atmosphere through the overflow space 35 past the water 28 in the upper part of the housing 22 and down the outside of the pilot valve stem 12 into the chamber 6 above the valve 3.
- the valve 3 is raised by the hydrostatic pressure, against its own weight and the pressure of the spring 13 (Fig.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Self-Closing Valves And Venting Or Aerating Valves (AREA)
- Sanitary Device For Flush Toilet (AREA)
- Fluid-Driven Valves (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
- Safety Valves (AREA)
- Seal Device For Vehicle (AREA)
- Polarising Elements (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Details Of Valves (AREA)
- Lift Valve (AREA)
- Stereo-Broadcasting Methods (AREA)
- Pens And Brushes (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Feeding And Controlling Fuel (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB9708272.1A GB9708272D0 (en) | 1997-04-24 | 1997-04-24 | Discharge valve apparatus |
GB9708272 | 1997-04-24 | ||
PCT/GB1998/001153 WO1998048121A1 (en) | 1997-04-24 | 1998-04-21 | Discharge valve apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0977924A1 true EP0977924A1 (en) | 2000-02-09 |
EP0977924B1 EP0977924B1 (en) | 2002-10-09 |
Family
ID=10811261
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98917420A Expired - Lifetime EP0977924B1 (en) | 1997-04-24 | 1998-04-21 | Discharge valve apparatus |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP0977924B1 (en) |
AT (1) | ATE225883T1 (en) |
AU (1) | AU740241B2 (en) |
DE (1) | DE69808613T2 (en) |
DK (1) | DK0977924T3 (en) |
ES (1) | ES2185163T3 (en) |
GB (1) | GB9708272D0 (en) |
HU (1) | HUP0003854A3 (en) |
NZ (1) | NZ500271A (en) |
PL (1) | PL186895B1 (en) |
PT (1) | PT977924E (en) |
WO (1) | WO1998048121A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2336605A (en) * | 1998-04-21 | 1999-10-27 | Frost Douglas R D | Cistern outlet valve |
DE102017131400A1 (en) | 2017-12-28 | 2019-07-04 | Lixil International Pte. Ltd. | CYLINDER-PISTON UNIT |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2802244A1 (en) * | 1978-01-19 | 1979-07-26 | Abu Plast Kunststoff | VALVE UNIT FOR FLUSH BOXES |
FR2699203A1 (en) * | 1992-11-12 | 1994-06-17 | Fominaya Agullo Pablo | Flush mechanism for toilet - has two studs to prevent rotation of overflow, flush rod and overflow do not have to be aligned |
FR2698645B1 (en) * | 1992-12-01 | 1996-10-25 | Spmp | INTERRUPTABLE HUNTING MECHANISM WITH MINIMUM DRAIN VOLUME CONFORMING TO HYGIENE. |
ATE261521T1 (en) * | 1994-11-04 | 2004-03-15 | Polypipe Plc | DRAIN VALVE |
-
1997
- 1997-04-24 GB GBGB9708272.1A patent/GB9708272D0/en active Pending
-
1998
- 1998-04-21 PL PL98336467A patent/PL186895B1/en unknown
- 1998-04-21 ES ES98917420T patent/ES2185163T3/en not_active Expired - Lifetime
- 1998-04-21 WO PCT/GB1998/001153 patent/WO1998048121A1/en not_active Application Discontinuation
- 1998-04-21 DE DE69808613T patent/DE69808613T2/en not_active Expired - Fee Related
- 1998-04-21 PT PT98917420T patent/PT977924E/en unknown
- 1998-04-21 HU HU0003854A patent/HUP0003854A3/en unknown
- 1998-04-21 AT AT98917420T patent/ATE225883T1/en not_active IP Right Cessation
- 1998-04-21 AU AU70653/98A patent/AU740241B2/en not_active Ceased
- 1998-04-21 NZ NZ500271A patent/NZ500271A/en unknown
- 1998-04-21 DK DK98917420T patent/DK0977924T3/en active
- 1998-04-21 EP EP98917420A patent/EP0977924B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9848121A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1998048121A1 (en) | 1998-10-29 |
DE69808613D1 (en) | 2002-11-14 |
HUP0003854A2 (en) | 2001-02-28 |
ATE225883T1 (en) | 2002-10-15 |
PT977924E (en) | 2003-02-28 |
DE69808613T2 (en) | 2003-09-11 |
AU7065398A (en) | 1998-11-13 |
AU740241B2 (en) | 2001-11-01 |
HUP0003854A3 (en) | 2001-05-28 |
ES2185163T3 (en) | 2003-04-16 |
NZ500271A (en) | 2001-09-28 |
EP0977924B1 (en) | 2002-10-09 |
DK0977924T3 (en) | 2003-02-10 |
GB9708272D0 (en) | 1997-06-18 |
PL186895B1 (en) | 2004-03-31 |
PL336467A1 (en) | 2000-06-19 |
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