EP0236098A2 - Syphon device for a flushing cistern - Google Patents
Syphon device for a flushing cistern Download PDFInfo
- Publication number
- EP0236098A2 EP0236098A2 EP87301778A EP87301778A EP0236098A2 EP 0236098 A2 EP0236098 A2 EP 0236098A2 EP 87301778 A EP87301778 A EP 87301778A EP 87301778 A EP87301778 A EP 87301778A EP 0236098 A2 EP0236098 A2 EP 0236098A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cistern
- end portion
- inlet
- water
- shaped pipe
- 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.)
- Withdrawn
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D5/00—Special constructions of flushing devices, e.g. closed flushing system
- E03D5/02—Special constructions of flushing devices, e.g. closed flushing system operated mechanically or hydraulically (or pneumatically) also details such as push buttons, levers and pull-card therefor
- E03D5/024—Operated hydraulically or pneumatically
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- 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
- E03D1/06—Cisterns with tube siphons
- E03D1/07—Cisterns with tube siphons with movable or deformable siphon tubes
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- 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
- E03D1/141—Cisterns discharging variable quantities of water also cisterns with bell siphons in combination with flushing valves in cisterns with tube siphons and with tube siphons in combination with flushing valves
Definitions
- the present invention relates to a syphon device for a flushing cistern.
- Such syphon devices have conventionally employed an inverted U-shaped tube, one end of which is connected to the outlet to the cistern, and the other end of which is provided with a widened cylindrical portion in which a piston is vertically reciprocable.
- the piston has a valving arrangement, such that when the piston is raised, it initiates syphonic action, and thereafter water can flow via valve arrangement in the piston until the water in the cistern has drained to the bottom end of the widened portion.
- a syphon device for a flushing cistern comprising an inverted, generally U-shaped pipe, having first and second end portions joined by an upper connecting part, an outlet spigot for the cistern, means for mounting the U-shaped pipe so that it can be vertically reciprocated as a whole, substantially in its own plane, in the cistern, between an upper position in which the connecting part is above the cistern water level and a lower position in which it is below the cistern water level and means connecting the first end portion with the outlet spigot, so as to accommodate the vertical movement, while maintaining the connection, the second end portion being in fluid communication with the water in the cistern.
- the means connecting the first end portion to the spigot comprises a flexible outlet sleeve extending therebetween. This provides a reliable connection with the two parts.
- the means connecting the first end portion to the spigot comprise a flexible outlet bellows which may, if desired, be formed integrally with the U-shaped pipe, e.g. by blow moulding.
- an inlet housing is securable to the bottom of the cistern and a flexible inlet sleeve is connected between the inlet housing and the second end portion of the U-shaped pipe, the inlet housing having an inlet opening for communicating with the interior of the cistern.
- the flexible inlet and/or outlet sleeve are preferably formed of a flexible tube of plastics material provided with a reinforcement, for example in the form of a fabric or the like because the sleeves will undergo flexure every time the U-shaped tube moves between its two positions.
- the inlet housing may be connected to the second end portion of the U-shaped pipe by means of an inlet bellows which may also be formed integrally with the U-shaped pipe by blow moulding.
- the inlet bellows will act in the manner of a pump to force water over the bend of the U-shaped pipe to initiate the syphon action.
- the inlet bellows is preferably of significantly larger capacity than the outlet bellows to facilitate this.
- a one way valve e.g. a flap valve, is mounted adjacent the lower end of the inlet bellows to improve this pumping action.
- the inlet housing can, in a simple construction, be securable to the bottom of the cistern by being directly connected to the outlet spigot, for example by being formed integrally therewith. All of the parts of the device of the present invention can be formed of a plastics material to reduce expense.
- the flexible inlet sleeve or more preferably the inlet housing is provided with at least one aperture adapted to be spaced above the bottom of the cistern, in order to break the syphon flowing through said syphon tube, when the water level in the cistern drops to a level above the bottom of the cistern. In this way a small amount of water is always retained within the cistern.
- the second end portion is provided with a supplementary inlet which opens into the cistern at a level above the lower end of said second end portion, whereby, if the U-shaped pipe is maintained fully down in its lower position, a larger proportion of the water in the cistern will be flushed, while, if the U-shaped pipe is allowed to rise immediately after the syphon has been made, the syphon will be broken when the water level drops to the level of the supplementary inlet, so that a smaller proportion of the water will be flushed.
- the supplementary inlet is preferably in the form of a tube connected to the second end portion and extending downwardly beside the inlet bellows, where provided.
- the U-shaped pipe may be movable to pass outside the outlet spigot it is preferably movable within it so that the inlet sleeve is always within the outlet spigot, when the U-shaped pipe is in its lower position.
- the means for mounting the U-shaped pipe in one particular construction, comprise a vertical rod adapted to pass through the top of the cistern, so that it can be directly manually depressed to move the U-shaped pipe to the lower position.
- Preferably means are provided to urge the U-shaped resiliently to the upper position, for example a simple coil compression spring.
- the means for mounting the U-shaped pipe for vertical reciprocable movement comprises a support securable to the cistern, a hydraulic actuator connected to said support and said U-shaped pipe, a feed pipe connected to said hydraulic actuator and connectable to the water supply of the flushing cistern and a manually operable actuating valve in said feed pipe, such that operation of said actuating valve allows the water supply pressure to be fed to said actuator to force said U-shaped pipe to its lower position.
- the support comprises an L-shaped bracket having a foot and an upstanding leg, the foot having an opening therein engageable by said outlet spigot to retain said bracket in place, the hydraulic actuator being connected to said upstanding leg.
- a flushing cistern including a water inlet valve connectable to a water supply, an inverted, generally U-shaped pipe, having first and second end portions joined by an upper connecting part, together forming a syphon tube, an outlet spigot for the cistern, means for connecting the first end portion to the outlet spigot, the second end portion being in fluid communication with water in said cistern, reciprocable means to cause water to flow from said second end portion into said connecting part to initiate a syphon action, a support securable to said cistern, a hydraulic actuator connected to said support and said means to cause water to flow, a feed pipe connected to said hydraulic actuator and connectable to the water supply of the flushing cistern and a manually operable actuating valve in said feed pipe such that operation of said actuating valve allows the water supply pressure to be fed to said actuator, to cause said means
- a conventional generally rectangular cistern l0 is provided with a lid ll carrying a tubular guide l2 through which is axially slidable a shaft l3 having a push knob l4 at its upper end with a return spring l5 shown between a flange l6 on the upper end of the shaft.
- a further flange l7 is provided at the lower end of the guide.
- the shaft l3 has been shown broken away for clarity of illustrated and will, in fact, be rather longer than shown in the drawing for a reason which will become apparent below.
- the flange l7 on the shaft l3 is connection to the upper connecting part l8 of an inverted U-shaped pipe l9 having a first end portion 20 and a second end portion 2l which is illustrated as being slightly longer than the end portion 20.
- first flexible sleeve 23 Secured in a conventional manner to the lower part of the cistern by means (not shown) is an outlet spigot 22 connected to the downpipe of the cistern, for example for connecting the cistern to the pan of a flushing toilet.
- the first end portion 20 is connected to the outlet spigot by a first flexible sleeve 23 which may, for example, be formed from a flexible tube of plastics material provided with a suitable reinforcement, for example of a fabric.
- the ends of the flexible sleeve may be secured by welding, adhesive, or by a suitable clamp, although the welding method is preferred.
- An inlet housing 24 is positioned below the second end portion 2l of the U-shaped tube l9 and is capable of being fixed to the bottom of the cistern, for example by being connected to, or preferably formed integrally with, the outlet spigot 22.
- a second flexible sleeve 25, similar to the sleeve 23, is connected between the housing 24 and the second portion 2l. Housing 24 is provided with inlet apertures 26.
- a conventional rectangular cistern 40 has a lid 4l and mounted within the cistern for vertical reciprocal movement is a U-shaped pipe 42 having a connecting portion 43 and first and second end portions 44 and 45.
- the first end portion 44 is connected by an outlet bellows 46 to an outlet spigot 47 connected to the downpipe 48 of the cistern.
- a similar, but rather larger inlet bellows 49 is connected to the second end portion 45 and is provided with an inlet housing portion 50 provided with inlet openings 5l.
- the bellows 46 and 49 may be formed integrally with the arms 44, 45 by means of blow moulding.
- the end portion 45 is formed with a supplementary inlet in the form of an L-shaped tube 52 having an opening 53 significantly below the normal water level 54 of the cistern and also communicating at 55 with the interior of the second end portion 45 of the U-shaped pipe 42.
- a crank arm 56 may be operated by the usual square cross-section bar 57 connected to a flushing handle (not shown) and is connected to a boss 58 via a slot 59.
- the second portion 45 could be elongated somewhat, and there could simply be an opening in the portion 45 at the same level as the opening 53 as indicated. Similarly, if one did not wish to have this facility for the partial flushing, the bellows arrangement could be used.
- FIG. 3 The arrangement of Figure 3 is generally similar to that of Figure 2, but an alternative arrangement has been shown for mounting the inverted U-shaped tube.
- This includes an L-shaped bracket 70 having a foot portion 72 and an upstanding leg 74.
- the foot portion 72 is provided with an opening or a slot through which is fitted the outlet spigot 48 and when the conventional nut is screwed up onto the outlet spigot, this will hold the bracket 70 in the position indicated so that the upstanding leg 74 is adjacent the bellows 46, 49.
- a hydraulic actuator 76 of the conventional piston and cylinder type. This has a piston rod 78 which is connected to a spigot 80 on the connection portion 43 of the inverted U-tube 42.
- the drawing also illustrates a conventional water inlet valve 82 having a water supply pipe 84 and the arm 86 of a float valve shown only partly.
- a feed pipe 88 Connected to the water supply pipe 84 is a feed pipe 88 having connected therein an actuating valve 90 with an outlet pipe 92 connected to the hydraulic actuator 76.
- An operating button 94 is provided for the valve 90, this operating button, for example, being provided in a front face or the lid of the cistern.
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Sanitary Device For Flush Toilet (AREA)
Abstract
A siphon device for a flushing cistern, said device comprising an inverted, generally U-shaped pipe (l9,42), having a first end portion (20,24) and a second end portion (2l,45) joined by an upper connecting part (l8,43), an outlet spigot (22,47) for the cistern connected to the first end portion, the second end portion (2l,45) being in fluid communication with the water in the cistern, the U-shaped pipe being mounted so that it can be vertically reciprocated as a whole, substantially in its own plane, in the cistern, between an upper position in which the connecting part is above the cistern water level (27,54) and a lower position in which the cistern water is caused to fill the connecting part and means (23,25,46,49) connect the first end portion (20,44) to the outlet spigot (42,49), these being designed to accomodate this vertical movement, while maintaining the connection.
Description
- The present invention relates to a syphon device for a flushing cistern.
- Such syphon devices have conventionally employed an inverted U-shaped tube, one end of which is connected to the outlet to the cistern, and the other end of which is provided with a widened cylindrical portion in which a piston is vertically reciprocable. The piston has a valving arrangement, such that when the piston is raised, it initiates syphonic action, and thereafter water can flow via valve arrangement in the piston until the water in the cistern has drained to the bottom end of the widened portion.
- While such constructions are normally reasonably satisfactory, they are firstly rather complex, and therefore expensive, and secondly, they are not entirely reliable due to jamming of the piston and improper operation of the valve arrangement associated with the piston which can either cause the syphon not originally to be made, so that flushing does not occur, or can induce incessant slow speed flushing.
- It is now proposed, according to the present invention, to provide a syphon device for a flushing cistern, said device comprising an inverted, generally U-shaped pipe, having first and second end portions joined by an upper connecting part, an outlet spigot for the cistern, means for mounting the U-shaped pipe so that it can be vertically reciprocated as a whole, substantially in its own plane, in the cistern, between an upper position in which the connecting part is above the cistern water level and a lower position in which it is below the cistern water level and means connecting the first end portion with the outlet spigot, so as to accommodate the vertical movement, while maintaining the connection, the second end portion being in fluid communication with the water in the cistern.
- Such a construction can be made very simply and does not require the use of a valve mechanism at all. When the U-shaped pipe is moved downwardly to its lower position, the U-shaped pipe is filled with water so that the syphon can be initiated. The U-shaped pipe is then raised to the upper position and the syphon will continue until the water level reaches a desired position within the cistern.
- In a preferred construction, the means connecting the first end portion to the spigot comprises a flexible outlet sleeve extending therebetween. This provides a reliable connection with the two parts.
- In a further construction, the means connecting the first end portion to the spigot comprise a flexible outlet bellows which may, if desired, be formed integrally with the U-shaped pipe, e.g. by blow moulding.
- An alternative which has been considered is a telescopic connection between the first end portion and the spigot but the flexible sleeve or bellows is preferred because of its reliability and the fact that it can more certainly be always fluidtight.
- Advantageously an inlet housing is securable to the bottom of the cistern and a flexible inlet sleeve is connected between the inlet housing and the second end portion of the U-shaped pipe, the inlet housing having an inlet opening for communicating with the interior of the cistern. The flexible inlet and/or outlet sleeve are preferably formed of a flexible tube of plastics material provided with a reinforcement, for example in the form of a fabric or the like because the sleeves will undergo flexure every time the U-shaped tube moves between its two positions.
- The inlet housing may be connected to the second end portion of the U-shaped pipe by means of an inlet bellows which may also be formed integrally with the U-shaped pipe by blow moulding. The inlet bellows will act in the manner of a pump to force water over the bend of the U-shaped pipe to initiate the syphon action. The inlet bellows is preferably of significantly larger capacity than the outlet bellows to facilitate this. Advantageously a one way valve, e.g. a flap valve, is mounted adjacent the lower end of the inlet bellows to improve this pumping action.
- The inlet housing can, in a simple construction, be securable to the bottom of the cistern by being directly connected to the outlet spigot, for example by being formed integrally therewith. All of the parts of the device of the present invention can be formed of a plastics material to reduce expense.
- The flexible inlet sleeve or more preferably the inlet housing is provided with at least one aperture adapted to be spaced above the bottom of the cistern, in order to break the syphon flowing through said syphon tube, when the water level in the cistern drops to a level above the bottom of the cistern. In this way a small amount of water is always retained within the cistern.
- In a further proposed construction, the second end portion is provided with a supplementary inlet which opens into the cistern at a level above the lower end of said second end portion, whereby, if the U-shaped pipe is maintained fully down in its lower position, a larger proportion of the water in the cistern will be flushed, while, if the U-shaped pipe is allowed to rise immediately after the syphon has been made, the syphon will be broken when the water level drops to the level of the supplementary inlet, so that a smaller proportion of the water will be flushed. The supplementary inlet is preferably in the form of a tube connected to the second end portion and extending downwardly beside the inlet bellows, where provided.
- While the U-shaped pipe may be movable to pass outside the outlet spigot it is preferably movable within it so that the inlet sleeve is always within the outlet spigot, when the U-shaped pipe is in its lower position.
- The means for mounting the U-shaped pipe, in one particular construction, comprise a vertical rod adapted to pass through the top of the cistern, so that it can be directly manually depressed to move the U-shaped pipe to the lower position. Preferably means are provided to urge the U-shaped resiliently to the upper position, for example a simple coil compression spring.
- In an alternative construction, the means for mounting the U-shaped pipe for vertical reciprocable movement comprises a support securable to the cistern, a hydraulic actuator connected to said support and said U-shaped pipe, a feed pipe connected to said hydraulic actuator and connectable to the water supply of the flushing cistern and a manually operable actuating valve in said feed pipe, such that operation of said actuating valve allows the water supply pressure to be fed to said actuator to force said U-shaped pipe to its lower position.
- Advantageously the support comprises an L-shaped bracket having a foot and an upstanding leg, the foot having an opening therein engageable by said outlet spigot to retain said bracket in place, the hydraulic actuator being connected to said upstanding leg.
- Such an arrangement is also applicable to other types of flushing cistern and it is therefore proposed, according to a further aspect of the present invention, to provide a flushing cistern including a water inlet valve connectable to a water supply, an inverted, generally U-shaped pipe, having first and second end portions joined by an upper connecting part, together forming a syphon tube, an outlet spigot for the cistern, means for connecting the first end portion to the outlet spigot, the second end portion being in fluid communication with water in said cistern, reciprocable means to cause water to flow from said second end portion into said connecting part to initiate a syphon action, a support securable to said cistern, a hydraulic actuator connected to said support and said means to cause water to flow, a feed pipe connected to said hydraulic actuator and connectable to the water supply of the flushing cistern and a manually operable actuating valve in said feed pipe such that operation of said actuating valve allows the water supply pressure to be fed to said actuator, to cause said means to operate to initiate said syphon action.
- In order that the invention may more readily be understood, the following description is given, merely by way of example, reference being made to the accompanying drawing, in which Figures l, 2 and 3 are each a schematic cross-section through a flushing cistern provided with three different embodiments of syphon device according to the present invention.
- In Figure l a conventional generally rectangular cistern l0 is provided with a lid ll carrying a tubular guide l2 through which is axially slidable a shaft l3 having a push knob l4 at its upper end with a return spring l5 shown between a flange l6 on the upper end of the shaft. A further flange l7 is provided at the lower end of the guide. The shaft l3 has been shown broken away for clarity of illustrated and will, in fact, be rather longer than shown in the drawing for a reason which will become apparent below.
- The flange l7 on the shaft l3 is connection to the upper connecting part l8 of an inverted U-shaped pipe l9 having a
first end portion 20 and a second end portion 2l which is illustrated as being slightly longer than theend portion 20. - Secured in a conventional manner to the lower part of the cistern by means (not shown) is an
outlet spigot 22 connected to the downpipe of the cistern, for example for connecting the cistern to the pan of a flushing toilet. Thefirst end portion 20 is connected to the outlet spigot by a firstflexible sleeve 23 which may, for example, be formed from a flexible tube of plastics material provided with a suitable reinforcement, for example of a fabric. The ends of the flexible sleeve may be secured by welding, adhesive, or by a suitable clamp, although the welding method is preferred. - An
inlet housing 24 is positioned below the second end portion 2l of the U-shaped tube l9 and is capable of being fixed to the bottom of the cistern, for example by being connected to, or preferably formed integrally with, the outlet spigot 22. A secondflexible sleeve 25, similar to thesleeve 23, is connected between thehousing 24 and the second portion 2l.Housing 24 is provided withinlet apertures 26. - In operation, the water in the cistern indicated at the
level 27, the knob l4 is pushed downwardly, thus pushing the U-shaped pipe l9 to the position indicated in phantom, with the upper part l8 below thewater level 27. Water flowing into theinlet 26 will flow into the upper part and will begin to flow through theoutlet spigot 22. The syphon thus formed will continue to operate when the knob l4 is released and the spring l5 urges the pipe l9 to the upper position illustrated in full line. The syphon will be broken when the water level arrives at the upper edges of theapertures 26. - In the construction of Figure 2, a conventional
rectangular cistern 40 has a lid 4l and mounted within the cistern for vertical reciprocal movement is aU-shaped pipe 42 having a connectingportion 43 and first andsecond end portions first end portion 44 is connected by anoutlet bellows 46 to anoutlet spigot 47 connected to thedownpipe 48 of the cistern. - A similar, but rather
larger inlet bellows 49 is connected to thesecond end portion 45 and is provided with aninlet housing portion 50 provided with inlet openings 5l. Thebellows arms inlet bellows 49, near the upper part of theinlet housing 50, is positioned a one-way flap valve 50A, which can move from an open position, as illustrated, and a closed position in which it engages on an annular valve seat D. This allows water to flow freely up into the inlet bellows, but restricts downward flow out of the bellows. - At a point above the
bellows 49 theend portion 45 is formed with a supplementary inlet in the form of an L-shaped tube 52 having anopening 53 significantly below the normal water level 54 of the cistern and also communicating at 55 with the interior of thesecond end portion 45 of the U-shapedpipe 42. - A
crank arm 56 may be operated by the usualsquare cross-section bar 57 connected to a flushing handle (not shown) and is connected to aboss 58 via aslot 59. - When the flushing handle is turned, the
bar 57 will turn thereby causing thecrank 56 to pivot downwardly and thereby force theU-shaped pipe 42 downwardly. This downward movement will continue until the top of the connectingportion 43 is below the water level 54. The act of completing the syphon will be facilitated by the action of thebellows 49 which, it will be noted, is rather larger than thebellows 46. If the handle is kept down, then all of the water within the syphon will continue to flush because thelower end 53 of thetube 52 will be approximately level with the openings 5l in theinlet housing 50. - If, on the other hand, immediately after the syphon has been made, the handle is released, the bellows will expand and force the
pipe 42 upwardly until it is above the level of the water line. The syphon will continue to operate until the water level drops to the level of theopening 53 whereupon it will be broken, thereby giving a part flush which is sometimes all that is necessary. - Instead of having the
pipe 52, thesecond portion 45 could be elongated somewhat, and there could simply be an opening in theportion 45 at the same level as theopening 53 as indicated. Similarly, if one did not wish to have this facility for the partial flushing, the bellows arrangement could be used. - It will be noted that spanning the gap between the two
portions pipe 42 is pushed downwardly, this air will be trapped in this space and will assist in returning the pipe to its upper position due to the upthrust provided by the water. - The arrangement of Figure 3 is generally similar to that of Figure 2, but an alternative arrangement has been shown for mounting the inverted U-shaped tube. This includes an L-
shaped bracket 70 having afoot portion 72 and anupstanding leg 74. Thefoot portion 72 is provided with an opening or a slot through which is fitted theoutlet spigot 48 and when the conventional nut is screwed up onto the outlet spigot, this will hold thebracket 70 in the position indicated so that theupstanding leg 74 is adjacent thebellows - Mounted on the
upstanding leg 74 is ahydraulic actuator 76 of the conventional piston and cylinder type. This has apiston rod 78 which is connected to aspigot 80 on theconnection portion 43 of the invertedU-tube 42. - The drawing also illustrates a conventional
water inlet valve 82 having awater supply pipe 84 and thearm 86 of a float valve shown only partly. Connected to thewater supply pipe 84 is afeed pipe 88 having connected therein anactuating valve 90 with anoutlet pipe 92 connected to thehydraulic actuator 76. Anoperating button 94 is provided for thevalve 90, this operating button, for example, being provided in a front face or the lid of the cistern. - When the
button 94 is depressed, the water pressure of the supply is fed directly to theactuator 76 and the piston of this moves downwardly, thereby depressing theU-shaped tube 42 below the water level 54, thereby completing the syphon. - Such constructions are particularly simple and yet are effective and reliable in operation.
Claims (12)
1. A syphon device for a flushing cistern, said device comprising an inverted, generally U-shaped pipe (l9,42), having a first end portion (20,44) and a second end portion (2l,45) joined by an upper connecting part (l8,43), an outlet spigot (22,47) for the cistern connected to the first end portion the second end portion (2l,45) being in fluid communication with the water in the cistern, characterised in that means (l2-l6; 56-59; 76-90) are provided for mounting the U-shaped pipe so that it can be vertically reciprocated as a whole, substantially in its own plane, in the cistern (l0,40), between an upper position in which the connecting part is above the cistern water level (27,54) and a lower position in which cistern water is caused to fill the connecting part and in that means (23,25,46,49) connecting the first end portion (20,44) with the outlet spigot (42,49) are designed to accommodate this vertical movement, while maintaining the connection.
2. A device according to claim l, characterised in that the means connecting the first end portion to the spigot comprises a flexible outlet sleeve (23) extending therebetween.
3. A device according to claim l, characterised in that the means connecting the first end portion to the spigot comprise a flexible outlet bellows (46).
4. A device according to any preceding claim, characterised in that an inlet housing (24,50) is securable to the bottom of the cistern and a flexible inlet sleeve (25,49) is connected between the inlet housing and the second end portion (2l,45) of the U-shaped pipe, and in that the inlet housing has an inlet opening (26,5l) for communicating with the interior of the cistern.
5. A device according to claim 4, characterised in that the flexible inlet sleeve (49) comprises an inlet bellows.
6. A device according to claim 5, characterised in that the inlet bellows is formed integrally with the U-shaped pipe by blow-moulding.
7. A device according to claim 6, characterised in that a one-way valve (50A,50B) is provided adjacent the lower end of said inlet bellows.
8. A device according to claim 4, 5 or 6, wherein the inlet housing is directly connected to the outlet spigot.
9. A device according to any one of claims 4 to 8, characterised in that the inlet sleeve or inlet housing are provided with at least one aperture (55) adapted to be spaced above the bottom of the cistern in order to break the syphon flowing through the U-shaped tube when the water level in the cistern drops at a level above the bottom of the cistern.
l0. A device according to claim 9, characterised in that the second end portion is provided with a supplementary inlet (52) which opens (at 53) into the cistern to a level above the lower end of said second end portion.
11. A device according to any preceding claim, characterised in that the means for mounting the U-shaped pipe for vertical reciprocal movement comprise a support (72,74) securable to the cistern, a hydraulic actuator (76,78) connected to said support and said U-shaped pipe, a feed pipe (88,92) connected to said hydraulic actuator and connectable to the water supply (84) of the flushing cistern and a manually operable actuating valve (90,94) in said feed pipe, such that operation of said actuating valve allows the water supply pressure to be fed to said actuator to force said U-shaped pipe to its lower position.
12. A flushing cistern including a water inlet valve (82) connectable to a water supply (84), an inverted generally U-shaped pipe (l9,42), having first and second end portions joined by an upper connecting part, together forming a syphon tube, an outlet spigot (22,47) for the cistern, means for connecting the first end portion to the outlet spigot, the second end portion being in fluid connection to the water in the cistern, reciprocable means to cause water to flow from said second end portion into said connecting part to initiate a syphon action, a support (72,74) securable to said cistern, a hydraulic actuator (76,78) connected to said support and to said U-shaped pipe and said means to cause water to flow, a feed pipe (88,92) connected to said hydraulic actuator and connectable to the water supply (84) of the flushing cistern and a manually operable actuating valve (90,94) in said feed pipe, such that operation of said actuating valve allows the water supply pressure to be fed to said actuator, to cause said means to operate to initiate said syphon action.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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GB868605299A GB8605299D0 (en) | 1986-03-04 | 1986-03-04 | Syphon device |
GB8605299 | 1986-03-04 | ||
GB868624688A GB8624688D0 (en) | 1986-03-04 | 1986-10-15 | Syphon device for cistern |
GB8624688 | 1986-10-15 |
Publications (1)
Publication Number | Publication Date |
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EP0236098A2 true EP0236098A2 (en) | 1987-09-09 |
Family
ID=26290434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87301778A Withdrawn EP0236098A2 (en) | 1986-03-04 | 1987-02-27 | Syphon device for a flushing cistern |
Country Status (1)
Country | Link |
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EP (1) | EP0236098A2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007111493A1 (en) * | 2006-02-28 | 2007-10-04 | Lee Chooi Tian | Tube siphon discharging two different quantities of flush water |
GB2518805A (en) * | 2013-06-14 | 2015-04-08 | Nat College Of Art And Design | A float device |
CN111691098A (en) * | 2020-07-01 | 2020-09-22 | 浙江天派针织有限公司 | Water-saving knitted fabric wet separation device |
-
1987
- 1987-02-27 EP EP87301778A patent/EP0236098A2/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007111493A1 (en) * | 2006-02-28 | 2007-10-04 | Lee Chooi Tian | Tube siphon discharging two different quantities of flush water |
CN101389814B (en) * | 2006-02-28 | 2012-11-14 | 李水天 | Tube siphon discharging two different quantities of flush water |
GB2518805A (en) * | 2013-06-14 | 2015-04-08 | Nat College Of Art And Design | A float device |
GB2518805B (en) * | 2013-06-14 | 2018-02-14 | Nat College Of Art And Design | A float device |
CN111691098A (en) * | 2020-07-01 | 2020-09-22 | 浙江天派针织有限公司 | Water-saving knitted fabric wet separation device |
CN111691098B (en) * | 2020-07-01 | 2022-08-02 | 浙江天派针织有限公司 | Water-saving knitted fabric wet separation device |
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