CA1129153A - Variable volume flushing cistern - Google Patents
Variable volume flushing cisternInfo
- Publication number
- CA1129153A CA1129153A CA347,369A CA347369A CA1129153A CA 1129153 A CA1129153 A CA 1129153A CA 347369 A CA347369 A CA 347369A CA 1129153 A CA1129153 A CA 1129153A
- Authority
- CA
- Canada
- Prior art keywords
- compartment
- flap
- flushing valve
- flushing
- cistern
- 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
Links
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
- E03D1/22—Twin or multiple flushing cisterns
-
- 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
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)
- Sanitary Device For Flush Toilet (AREA)
Abstract
ABSTRACT
A variable volume flushing cistern comprising a body with a division wall across it to form two compartments, the first containing a float and water inlet valve and communicating with a flushing valve on the base of the cistern, a second communicating through a movable flap with the flushing valve so that by closing the valve water from the second compartment can be prevented from discharging through the flushing valve when a smaller flush is required.
A variable volume flushing cistern comprising a body with a division wall across it to form two compartments, the first containing a float and water inlet valve and communicating with a flushing valve on the base of the cistern, a second communicating through a movable flap with the flushing valve so that by closing the valve water from the second compartment can be prevented from discharging through the flushing valve when a smaller flush is required.
Description
~29153 This invention relates to a variable volume flushing cistern and in particular it relates to a cistern of the type in which a selection can be made of the am~unt of water discharged during a flush.
THE PRIOR ART
It is already known to provide cisterns in which either a low volume or a high volume discharge is possible by selection and these usually have been of the type in which either part of the cistern or the whole of the cistern can be discharged during a flush.
This has for instance been achieved by operating the discharge valve to seal when a certain selected level of water is reached, or it has been attained by use of compartments which vary in volume. In other prior art, such as U.S. Patent No. 4,143,430, a two compartment cistern is used having a release flap which operates in accordance with how far the operating lever is pulled down.
In apparatus of this type it is desirable to achieve the variable flush in a simple manner and one which is reliable in operation to ensure correct flushing of the toilet pan.
OBJECT OF THE INVENTION
-An object of the present invention is to provide a simple and effective variable volume flushing cistern while retaining the normal type of flushing apparatus.
SUMMARY OF THE INVENTION
The object is achieved by having a first compartment which includes the flushing valve, and a second compartment
THE PRIOR ART
It is already known to provide cisterns in which either a low volume or a high volume discharge is possible by selection and these usually have been of the type in which either part of the cistern or the whole of the cistern can be discharged during a flush.
This has for instance been achieved by operating the discharge valve to seal when a certain selected level of water is reached, or it has been attained by use of compartments which vary in volume. In other prior art, such as U.S. Patent No. 4,143,430, a two compartment cistern is used having a release flap which operates in accordance with how far the operating lever is pulled down.
In apparatus of this type it is desirable to achieve the variable flush in a simple manner and one which is reliable in operation to ensure correct flushing of the toilet pan.
OBJECT OF THE INVENTION
-An object of the present invention is to provide a simple and effective variable volume flushing cistern while retaining the normal type of flushing apparatus.
SUMMARY OF THE INVENTION
The object is achieved by having a first compartment which includes the flushing valve, and a second compartment
- 2 -q~ , ~iZ9153 which is isolated from the flushing valve but is provided with a flap whereby the second compartment can also be placed into communication with the flushing valve.
The flap can be controlled by a simple volume control member or there can be two push buttons one to release the larger volume of water and the other the smaller volume.
The actual construction of the unit can be varied within the spirit of the invention but according to a convenient form the cistern and flushing valve are constructed as heretofore but the first and second compart-ments are formed by placing a division wall across the cistern body with a float and water inlet activated by the float located in the same or different compartments preferably with the float ;n the first compartment and the water inlet in the second compartment, the flushing valve being disposed in the first compartment but isolated from the second compartment by a flap which can move into a position where it closes off the second compartment from the first compartment and the flushing valve, but by appropriately moving the flap flow can take place to the flushing valve both from the second compartment and the first compartment.
In another form the variable volume flushing cistern comprises a cistern and flushing valve constructed as heretofore but the first and second compartments are formed by placing a division wall across the cistern body to form a first and second compartment;
a float located within said cistern;
l~Z9153 a water inlet in said cistern to be actuated by the float;
a flushing valve in the said first compartment positioned to discharge water from the said first compartment and movable by an operating stem passing through said division wall;
a movable flap forming part of the said division wall to allow the said second compartment to be isolated from the said flushing valve in the said first compartment;
first operating means connected to the said operating stem to actuate the said flushing valve to initiate a large flush from both said compartments; and second operating means connected to said operating stem to actuate the flushing valve and engaging said flap to close the said flap to isolate the said second compartment from the said flushing ~alve, thus initiating a smaller flush from said first compartment, said division wall having a portion extending over the flushing valve and on one side extending upwardly and on the other side having a portion adapted to be engaged by said flap, the said flap being hinged to the floor of the said body to define with the diYision wall the said first and the second compartments, said first operating means including a first rotatable member, said first member belng operated by a button connected thereto, a second rotatable member position adjacent to said first member, said second member being coupled to the said operating stem by connecting means and said first member being adapted to engage with said second member whereby operation of the button causes the first member to rotate and engage the second member causing the second member to rotate ~lZ9153 to activate the operating stem to o~en the said flushing valve, and said second operating means including a third rotatable member located adjacent the second member and remote from said first member, said third member being operated by a second button connected thereto and having a member projecting therefrom and adapted to engage a projection, extending from said flap in the direction of said first compartment, said third member being adapted to engage said second member whereby operation of the said second button causes the third member to rotate and engage the second member causing the second member to rotate and activate the operating stem to operate said flushing valve, while simultaneously the said member projecting from the third member bears on the flap projection and closes said flap to isolate the said second compartment from the flushing valve to initiate a smaller flush from the sald first compartment.
BRIED DESCRIPTION OF THE DRAWINGS
Figure 1 is a transverse section of one embodiment of the cistern showing the valve sectioned and showing its relationship to the first and the second compartment, showing the position of the valve and flap and associated subchamber before a flush is initiated.
Figures 2 is a similar view of the embodiment of Figure 1 after a smaller volume flush is completed,but showing the flushing valve and flap in the position they occupy, during the flush, and Figure 3 is a similar view of the embodiment of Figure 1 ~29153 - after a full flush has terminated but before the flushing valve and flap have returned.
Figure 4 is a view of another embodiment of the cistern with part of the front wall removed showing the position of the flushing valve and the flap and respective operating means before a flush is initiated.
Figure 5 shows an enlarged view of the flushing valve, flap and operating means during the small volume flush of the embodiment shown in Figure 4.
Figure 6 is a view similar to Figure 5 but showing the positton of the flushing valve, flap and operating means during the large volume flush.
Figure 7 shows an exploded view of the operating means of the cistern of the figures 4 to 6.
DESC _ TION OF THE PREFERRED EMBODIMENT
The cistern of the first embodiment as shown in Figure 1 to 3 comprise a body 1, comprising sides and a floor, of the cistern has within it a water inlet valve 2 which is operated through an arm 3 by a float 4 in any usual or approved manner.
The body is closed by a lid S.
Through the base of the body 1 is positioned an outlet member 6 which is adapted to engage a flush plpe, not shown, and on this outlet member 6 is the flushing valve 7 which again can take any usual approved form but according to the form shown IS a flat disc fitted to a hollow operating stem 8 which forms the cistern overflow and which is engaged by a lever 9 which forms a first flush initiating member, ~29153 having its fulcrum 10 supported on a bracket 11 secured to the body 1 itself, the lever 9 being operable by a push button 12 which has a stem 13 projecting down into contact with the lever 9 so that when the push button 12 is depressed, the lever 9 rocks about the fulcrum 10 to lift the operating stem 8 and thus the valve 7 off its seat on the tail 6. The stem 13 forms part of the push button 12.
The flushing valve 7 is retractable into a recess 15 in a guide 16 which is supported from the outlet member 6 in usual manner and above this recess 15 is a division wall 17 which extends across the body 1 of the cistern and has a portion extending o~er the outlet member and has an upwardly disposed continuation 18 of the wall which again extends from the front to the back of the body 1 to divide the body into two compartments.
Also extending across the body 1 is a flap 19 which is held by a fulcrum 20 to the tail 6 and is connected by a rod 21 to a further lever 22, which forms a second flush initiating member, which is also supported on a fulcrum 23 on the aforesaid bracket 11 and this lever is in the path of a stem 24 which forms part of a second push button 25 so that when this second push button 25 is depressed the lever 22 will move the rod 21 and this will move the flap 19 towards the end of the wall 17 to at least partially close the aperture 27 between the flap 19 and the end 28 of the wall 17~
l~Z9~53 The stem 13 is of a width such that it engages only the lever 9 when the button 12 is depressedl but the stem 24 is arranged to engage both the lever 9 and the lever 22 so that when the small button 25 is depressed the valve 7 is raised to effect a flush but the flap 19 is also actuated to close the aperture 27, thereby preventing the water from the second compartment from discharging.
From the foregoing it will be realised that the cistern body 1 is filled with water to the level indicated by 30 and lQ it will be noted that the extension 18 of the wall 17 terminates below the water level so that the water will flow over the wall 18 to also fill the space between the extension wall 18 and that side of the body 1 of the cistern, the cistern body thus being divided into a first compartment 32 which is smaller and contains the float 4 and a second compartment 33 which is larger and has the water inlet 2 positioned in it.
When it is desired to initaite a small flush, the -smaller push button 25 is depressed and through the stem -24 it moves the lever 9 about the fulcrum 10 to lift the operating stem 8 to move the flushing valve 7 into the recess 15, but at the same time it also moves with it the lever 22 about its fulcrum 23 and through the rod 21 at least partially closes the flap 19 and immediately there is a flow of water from the compartment 32 and the compartment 33, the flow from the compartment 33 closing the flap because of its proximity to the end 28 of the wall 17 and the flush then continues only from a compartment 32 until - - .
~129153 the flush ceases whereupon the valve 7 which was held up into the recess 15 by the flow of water through the tail 6 drops back onto its seat and the flush terminates. The flap remains closed by water pressure until the flow of water ceases from the first compartment 32 and opens when water flows into the first compartment to balance the pressure on the two sides of the flap 19.
When however a larger flush is required, the larger push button 12 is depressed and through the lever 13 it operates only the lever 9 about the fulcrum 10 but does not actuate the le~er 22 so that the aperture 27 remains fully open as shown particularly in Fi.g. 3 and water then flows from both the first compartment 32 and the second compartment 33 until the valve 7 again leaves the recess 15 to seat on the outlet member 6.
The flap 19 during this time remains open as there is a substantial flow of water through the aperture 27 and this ensures that the flap will remain open as in contradistinction to what occurs when the flap has been moved to almost close the aperture in which case of course the pressure of the water flow then closes the aperture by moving the flap 19 the remainder of the distance.
From the foregoing it will be appreciated that the division wall 17 and its extension 18, acting in conjunction with the flap 1~, serves to divide the cistern body into the two compartments, the first being the smaller compartment 32 and the second the larger compartment 33 which can then be caused to empty together, or only the smaller compartment ~.Z9~53 32 can empty, the w~ter level in the second compartment 33 of course dropping to the height of the top edge of the extension wall 18 when the first compartment 32 is emptied to thereby use the water out of the first compartment 32 as well as the water above the extension wall 18 when a small flush is required.
As stated the actual mechanism for operating the flap can be varied and can be in the nature of a setable arrangement where a preselection is made of the flush capacity independently of the action of starting a flush but it can be associated with the actual member which is used to lift the valve to start a flush so that by appropriate operation of the button which starts the flush the flap is either opened or is left in its closed position or as said two different buttons can be used either of which will commence a flush but one of which will leave the flap in position whereas the other will lift the flap to cause the maximum flush to take place.
In the foregoing description the flap 19 has been described as normally open so that for a large flush it is not moved, but the flap could be normally closed so that to initiate a small volume flush only the flushing valve is actuated but if a large volume flush is required both the flushing valve and the flap are moved to their open positions.
The other embodiment illustrated in Figures 4 to 7 comprises a body 1, comprising sides and a floor, of the cistern has within it a water inlet valve 2 which is ~29~53 operated through an arm 3 by a float 4 in any suitable manner.
A lid 5 closes the cistern.
The base of the body 1 has an outlet member 6 with a flushing valve 7 resting thereon in the closed position.
The flushing valve can be of any suitable construction, however it is shown as a flat disc fitted to a hollow operating stem 8 which forms the cistern overflow.
The flushing valve 7 in operation is retractable into a recess 15 in a gutde 16. The recess 15 and the guide 16 are supported from the division wall 17 which extends across the body of the cistern and has an upwardly extending continuation 18 of the wall which again extends across the body of the cistern from front to back to divide the body into two compartments. Also extending across the body is a flap 19 which is hingedly attached to the base of the cistern, and which when closed against the wall 11 completes the partitioning of the two compartments.
From the foregoing it will be realised that as the cistern body 1 is filled with water to the level 30 which level is above the extension 18 of the wall 17, such water will flow over the extension 18 upon flushing of the smaller comaprtment 32. Therefore the inlet valve 2 can be located in either the smaller compartment 32 (as shown in Fig. 4) or the larger compartment 33, as when one or both of the compartments are flushed the level of the water in the compartment containing the float decreases lowering float 4 thus activating the inlet valve 2 upon cessation of the flush.
_ 11 --llZ9lS3 Turning now to the operation mechanism for flushing of the both compartments, as shown in Figure 6 and as shown in detail in Figure 7 there are two projections 31 extending from the hollow operating stem 8. A button 34, extending through the lid 5 operates the flushing valve 7.
The button 34 when depressed, depresses the member 35 which has two extensions 36 hingedly attached to two arms 37 of a first rotatable member 38. The member 35 thereby causes the first rotatable member 38 to rotate. A projection 39 of the first member 38 abuts against a projection 40 on a second rotatable member 41 causing the second member 41 to rotate. The member 41 has two arms 42 extending therefrom which having pivotably connected thereto a connecting member 43 which has two slots located remote from the arms 42 into which the two projections 31 engage.
Therefore upon rotation of member 41 the connecting member 43 raises the operating stem 8 and opens the flushing valve 7. The flap 12 remains in its open position and the water from both compartments flows through the outlet 6.
As there is a substantial flow of water through the passage 27 the flap remains in its open position. When pressure on the button 34 is released the rotatable member 38 and the button are returned to their original positions by action of a spring member 45, while the valve 7 is held in the recess 15 by the flow of water through the outlet 6.
This spring member 45 can be of any suitable material or construction. Upon cessation of the flow of water the valve 7 which was held in the recess 15 by the flow of water through llZ9~53 the outlet 6 falls from its position 7a to 7b closing the outlet 6.
To flush only the smaller compartment 32 the button 46 is depressed, as shown in Figure 5. On being depressed the button 46 depresses member 47 which has two arms 48 extending therefrom. The arms 48 being pivotally connected to arms 49 of a third rotatable member 50 such that when the rotatable member 50 rotates its projection 57 abuts against a projection 52 on the rotatable member 41 thereby rotating the rotatable member 41 and raising the flushing valve 7.
Also pivotably attached to one of the arms 49 is an elongated member 53, which bears against a projection 54 forcing the flap 19 to abut against the wall 17 to isolate the flushing valve 7 from the larger chamber 33 as shown in Figure 5. Therefore there is a simultaneous closing of the flap 19 and opening of the flushing valve 7 such that only the volume of water from the smaller compartment 32 and the water above the top edge of the continuation 18 in the compartment 33 flows through the outlet 6. The pressure of water in compartment 33 maintains the flap 19 in its closed position until the smaller compartment 32 refills with water to equalise the pressure across the flap such that the weight of the projection 55 returns the flap 19 to its fully open position. A spring member 56 against one of the arms 49 biases the rotatable member 50 and consequently the button 46 to their original positions.
:
_ 13 -., As can be seen in Figure 5 and Figure 6 operation of either button does not move the other button. When the rotatable member 41 is rotated its projections 40 and 52 do not engage the respective projection of the first or third rotatable member which ever is not being rotated.
Although the invention and many of its advantages will be understood from the foregoing description of several forms of the invention, it will be apparent that Yarious changes may be made in the form, construction and arrangement of parts without departing from the spirit and scope of the invention as described and claimed.
The flap can be controlled by a simple volume control member or there can be two push buttons one to release the larger volume of water and the other the smaller volume.
The actual construction of the unit can be varied within the spirit of the invention but according to a convenient form the cistern and flushing valve are constructed as heretofore but the first and second compart-ments are formed by placing a division wall across the cistern body with a float and water inlet activated by the float located in the same or different compartments preferably with the float ;n the first compartment and the water inlet in the second compartment, the flushing valve being disposed in the first compartment but isolated from the second compartment by a flap which can move into a position where it closes off the second compartment from the first compartment and the flushing valve, but by appropriately moving the flap flow can take place to the flushing valve both from the second compartment and the first compartment.
In another form the variable volume flushing cistern comprises a cistern and flushing valve constructed as heretofore but the first and second compartments are formed by placing a division wall across the cistern body to form a first and second compartment;
a float located within said cistern;
l~Z9153 a water inlet in said cistern to be actuated by the float;
a flushing valve in the said first compartment positioned to discharge water from the said first compartment and movable by an operating stem passing through said division wall;
a movable flap forming part of the said division wall to allow the said second compartment to be isolated from the said flushing valve in the said first compartment;
first operating means connected to the said operating stem to actuate the said flushing valve to initiate a large flush from both said compartments; and second operating means connected to said operating stem to actuate the flushing valve and engaging said flap to close the said flap to isolate the said second compartment from the said flushing ~alve, thus initiating a smaller flush from said first compartment, said division wall having a portion extending over the flushing valve and on one side extending upwardly and on the other side having a portion adapted to be engaged by said flap, the said flap being hinged to the floor of the said body to define with the diYision wall the said first and the second compartments, said first operating means including a first rotatable member, said first member belng operated by a button connected thereto, a second rotatable member position adjacent to said first member, said second member being coupled to the said operating stem by connecting means and said first member being adapted to engage with said second member whereby operation of the button causes the first member to rotate and engage the second member causing the second member to rotate ~lZ9153 to activate the operating stem to o~en the said flushing valve, and said second operating means including a third rotatable member located adjacent the second member and remote from said first member, said third member being operated by a second button connected thereto and having a member projecting therefrom and adapted to engage a projection, extending from said flap in the direction of said first compartment, said third member being adapted to engage said second member whereby operation of the said second button causes the third member to rotate and engage the second member causing the second member to rotate and activate the operating stem to operate said flushing valve, while simultaneously the said member projecting from the third member bears on the flap projection and closes said flap to isolate the said second compartment from the flushing valve to initiate a smaller flush from the sald first compartment.
BRIED DESCRIPTION OF THE DRAWINGS
Figure 1 is a transverse section of one embodiment of the cistern showing the valve sectioned and showing its relationship to the first and the second compartment, showing the position of the valve and flap and associated subchamber before a flush is initiated.
Figures 2 is a similar view of the embodiment of Figure 1 after a smaller volume flush is completed,but showing the flushing valve and flap in the position they occupy, during the flush, and Figure 3 is a similar view of the embodiment of Figure 1 ~29153 - after a full flush has terminated but before the flushing valve and flap have returned.
Figure 4 is a view of another embodiment of the cistern with part of the front wall removed showing the position of the flushing valve and the flap and respective operating means before a flush is initiated.
Figure 5 shows an enlarged view of the flushing valve, flap and operating means during the small volume flush of the embodiment shown in Figure 4.
Figure 6 is a view similar to Figure 5 but showing the positton of the flushing valve, flap and operating means during the large volume flush.
Figure 7 shows an exploded view of the operating means of the cistern of the figures 4 to 6.
DESC _ TION OF THE PREFERRED EMBODIMENT
The cistern of the first embodiment as shown in Figure 1 to 3 comprise a body 1, comprising sides and a floor, of the cistern has within it a water inlet valve 2 which is operated through an arm 3 by a float 4 in any usual or approved manner.
The body is closed by a lid S.
Through the base of the body 1 is positioned an outlet member 6 which is adapted to engage a flush plpe, not shown, and on this outlet member 6 is the flushing valve 7 which again can take any usual approved form but according to the form shown IS a flat disc fitted to a hollow operating stem 8 which forms the cistern overflow and which is engaged by a lever 9 which forms a first flush initiating member, ~29153 having its fulcrum 10 supported on a bracket 11 secured to the body 1 itself, the lever 9 being operable by a push button 12 which has a stem 13 projecting down into contact with the lever 9 so that when the push button 12 is depressed, the lever 9 rocks about the fulcrum 10 to lift the operating stem 8 and thus the valve 7 off its seat on the tail 6. The stem 13 forms part of the push button 12.
The flushing valve 7 is retractable into a recess 15 in a guide 16 which is supported from the outlet member 6 in usual manner and above this recess 15 is a division wall 17 which extends across the body 1 of the cistern and has a portion extending o~er the outlet member and has an upwardly disposed continuation 18 of the wall which again extends from the front to the back of the body 1 to divide the body into two compartments.
Also extending across the body 1 is a flap 19 which is held by a fulcrum 20 to the tail 6 and is connected by a rod 21 to a further lever 22, which forms a second flush initiating member, which is also supported on a fulcrum 23 on the aforesaid bracket 11 and this lever is in the path of a stem 24 which forms part of a second push button 25 so that when this second push button 25 is depressed the lever 22 will move the rod 21 and this will move the flap 19 towards the end of the wall 17 to at least partially close the aperture 27 between the flap 19 and the end 28 of the wall 17~
l~Z9~53 The stem 13 is of a width such that it engages only the lever 9 when the button 12 is depressedl but the stem 24 is arranged to engage both the lever 9 and the lever 22 so that when the small button 25 is depressed the valve 7 is raised to effect a flush but the flap 19 is also actuated to close the aperture 27, thereby preventing the water from the second compartment from discharging.
From the foregoing it will be realised that the cistern body 1 is filled with water to the level indicated by 30 and lQ it will be noted that the extension 18 of the wall 17 terminates below the water level so that the water will flow over the wall 18 to also fill the space between the extension wall 18 and that side of the body 1 of the cistern, the cistern body thus being divided into a first compartment 32 which is smaller and contains the float 4 and a second compartment 33 which is larger and has the water inlet 2 positioned in it.
When it is desired to initaite a small flush, the -smaller push button 25 is depressed and through the stem -24 it moves the lever 9 about the fulcrum 10 to lift the operating stem 8 to move the flushing valve 7 into the recess 15, but at the same time it also moves with it the lever 22 about its fulcrum 23 and through the rod 21 at least partially closes the flap 19 and immediately there is a flow of water from the compartment 32 and the compartment 33, the flow from the compartment 33 closing the flap because of its proximity to the end 28 of the wall 17 and the flush then continues only from a compartment 32 until - - .
~129153 the flush ceases whereupon the valve 7 which was held up into the recess 15 by the flow of water through the tail 6 drops back onto its seat and the flush terminates. The flap remains closed by water pressure until the flow of water ceases from the first compartment 32 and opens when water flows into the first compartment to balance the pressure on the two sides of the flap 19.
When however a larger flush is required, the larger push button 12 is depressed and through the lever 13 it operates only the lever 9 about the fulcrum 10 but does not actuate the le~er 22 so that the aperture 27 remains fully open as shown particularly in Fi.g. 3 and water then flows from both the first compartment 32 and the second compartment 33 until the valve 7 again leaves the recess 15 to seat on the outlet member 6.
The flap 19 during this time remains open as there is a substantial flow of water through the aperture 27 and this ensures that the flap will remain open as in contradistinction to what occurs when the flap has been moved to almost close the aperture in which case of course the pressure of the water flow then closes the aperture by moving the flap 19 the remainder of the distance.
From the foregoing it will be appreciated that the division wall 17 and its extension 18, acting in conjunction with the flap 1~, serves to divide the cistern body into the two compartments, the first being the smaller compartment 32 and the second the larger compartment 33 which can then be caused to empty together, or only the smaller compartment ~.Z9~53 32 can empty, the w~ter level in the second compartment 33 of course dropping to the height of the top edge of the extension wall 18 when the first compartment 32 is emptied to thereby use the water out of the first compartment 32 as well as the water above the extension wall 18 when a small flush is required.
As stated the actual mechanism for operating the flap can be varied and can be in the nature of a setable arrangement where a preselection is made of the flush capacity independently of the action of starting a flush but it can be associated with the actual member which is used to lift the valve to start a flush so that by appropriate operation of the button which starts the flush the flap is either opened or is left in its closed position or as said two different buttons can be used either of which will commence a flush but one of which will leave the flap in position whereas the other will lift the flap to cause the maximum flush to take place.
In the foregoing description the flap 19 has been described as normally open so that for a large flush it is not moved, but the flap could be normally closed so that to initiate a small volume flush only the flushing valve is actuated but if a large volume flush is required both the flushing valve and the flap are moved to their open positions.
The other embodiment illustrated in Figures 4 to 7 comprises a body 1, comprising sides and a floor, of the cistern has within it a water inlet valve 2 which is ~29~53 operated through an arm 3 by a float 4 in any suitable manner.
A lid 5 closes the cistern.
The base of the body 1 has an outlet member 6 with a flushing valve 7 resting thereon in the closed position.
The flushing valve can be of any suitable construction, however it is shown as a flat disc fitted to a hollow operating stem 8 which forms the cistern overflow.
The flushing valve 7 in operation is retractable into a recess 15 in a gutde 16. The recess 15 and the guide 16 are supported from the division wall 17 which extends across the body of the cistern and has an upwardly extending continuation 18 of the wall which again extends across the body of the cistern from front to back to divide the body into two compartments. Also extending across the body is a flap 19 which is hingedly attached to the base of the cistern, and which when closed against the wall 11 completes the partitioning of the two compartments.
From the foregoing it will be realised that as the cistern body 1 is filled with water to the level 30 which level is above the extension 18 of the wall 17, such water will flow over the extension 18 upon flushing of the smaller comaprtment 32. Therefore the inlet valve 2 can be located in either the smaller compartment 32 (as shown in Fig. 4) or the larger compartment 33, as when one or both of the compartments are flushed the level of the water in the compartment containing the float decreases lowering float 4 thus activating the inlet valve 2 upon cessation of the flush.
_ 11 --llZ9lS3 Turning now to the operation mechanism for flushing of the both compartments, as shown in Figure 6 and as shown in detail in Figure 7 there are two projections 31 extending from the hollow operating stem 8. A button 34, extending through the lid 5 operates the flushing valve 7.
The button 34 when depressed, depresses the member 35 which has two extensions 36 hingedly attached to two arms 37 of a first rotatable member 38. The member 35 thereby causes the first rotatable member 38 to rotate. A projection 39 of the first member 38 abuts against a projection 40 on a second rotatable member 41 causing the second member 41 to rotate. The member 41 has two arms 42 extending therefrom which having pivotably connected thereto a connecting member 43 which has two slots located remote from the arms 42 into which the two projections 31 engage.
Therefore upon rotation of member 41 the connecting member 43 raises the operating stem 8 and opens the flushing valve 7. The flap 12 remains in its open position and the water from both compartments flows through the outlet 6.
As there is a substantial flow of water through the passage 27 the flap remains in its open position. When pressure on the button 34 is released the rotatable member 38 and the button are returned to their original positions by action of a spring member 45, while the valve 7 is held in the recess 15 by the flow of water through the outlet 6.
This spring member 45 can be of any suitable material or construction. Upon cessation of the flow of water the valve 7 which was held in the recess 15 by the flow of water through llZ9~53 the outlet 6 falls from its position 7a to 7b closing the outlet 6.
To flush only the smaller compartment 32 the button 46 is depressed, as shown in Figure 5. On being depressed the button 46 depresses member 47 which has two arms 48 extending therefrom. The arms 48 being pivotally connected to arms 49 of a third rotatable member 50 such that when the rotatable member 50 rotates its projection 57 abuts against a projection 52 on the rotatable member 41 thereby rotating the rotatable member 41 and raising the flushing valve 7.
Also pivotably attached to one of the arms 49 is an elongated member 53, which bears against a projection 54 forcing the flap 19 to abut against the wall 17 to isolate the flushing valve 7 from the larger chamber 33 as shown in Figure 5. Therefore there is a simultaneous closing of the flap 19 and opening of the flushing valve 7 such that only the volume of water from the smaller compartment 32 and the water above the top edge of the continuation 18 in the compartment 33 flows through the outlet 6. The pressure of water in compartment 33 maintains the flap 19 in its closed position until the smaller compartment 32 refills with water to equalise the pressure across the flap such that the weight of the projection 55 returns the flap 19 to its fully open position. A spring member 56 against one of the arms 49 biases the rotatable member 50 and consequently the button 46 to their original positions.
:
_ 13 -., As can be seen in Figure 5 and Figure 6 operation of either button does not move the other button. When the rotatable member 41 is rotated its projections 40 and 52 do not engage the respective projection of the first or third rotatable member which ever is not being rotated.
Although the invention and many of its advantages will be understood from the foregoing description of several forms of the invention, it will be apparent that Yarious changes may be made in the form, construction and arrangement of parts without departing from the spirit and scope of the invention as described and claimed.
Claims (11)
1. A variable volume flushing cistern comprising, a body having a division wall across it to form a first compartment and a second compartment, a float located within said cistern a water inlet within said cistern connected to be actuated by the said float, a flushing valve in the said first compartment positioned to discharge water from the said first compart-ment through a water outlet member, a movable flap forming part of the said division wall to allow the said second compartment to be isolated from the said flushing valve in the said first compartment, said division wall having a portion extending over said outlet member and on one side extending upwardly and on the other side being adapted to be engaged by said flap, the said flap being hinged to a floor of said body to define with the division wall the said first and the said second compartments, and means connected to the said flushing valve and the said flap to actuate the said flushing valve only or the said flushing valve and the said flap together, whereby to initiate a large flush from both said compart-ments or a smaller flush from said first compartment, said flushing valve being actuated by a first operating member and said flap being actuated by a second operating member arranged to operate also the first opera-ting member when the said second operating member is act-uated, said first and the said second operating members being push buttons positioned adjacent to levers, fulcrums supporting the said levers from the said body, the said lever of the said first push button being connected to the said flushing valve to operate it, the said lever of the second push button being connected to the said flap to operate it, but to also simultaneously operate the lever of the said first push button.
2. A variable volume flushing cistern according to claim 1, wherein said outlet member is disposed in said floor.
3. A variable volume flushing cistern according to claim 1 wherein the said connecting means between the said first lever and the flushing valve consist of a hollow stem extending from above the water level in the said cistern to connect to the said flushing valve, said hollow stem open-ing through the said flushing valve to serve as an overflow during any malfunction of the said float controlled water inlet valve.
4. A variable volume flushing cistern according to claim 3 wherein the said connecting means between the said second lever and the said flap is a rod, said lever of the second push button being adjacent to the lever of the first push button whereby both levers are moved by the Raid second push button.
5. A variable volume flushing cistern comprising, a body to contain water, a water inlet valve in said body near one end thereof, a float in the said body near the other end thereof, an arm connecting the said float to the said water inlet valve whereby to maintain a measured quantity of water in the said body between flushes, a hollow outlet member in a floor of the said body adapted to connect to a flush pipe, a flushing valve adapted to close the said outlet member between flushes, a wall extending across the said cistern body above the said flushing valve and extending upwards in the said body on one side of the said outlet member to define a first and a second compartment, said first compartment containing the said float, said second compartment contain-ing the said water inlet valve, a flap at the floor of the said body to engage the said wall on the other side of the said outlet member, said flap being normally open but movable to prevent flow of water from the said second compartment to the said out-let member, means to move only the said flushing valve to initiate a large flush simultaneously from the said first compartment and the said second compartment, and means to move both the said flushing valve and the said flap to close the said flap to initiate a small flush from the said first compartment only, the said flushing valve and the said flap being moved by connection to push button operated levers pivoted to a support on the said cistern body, a first said push button being connected to actuate the lever of the said flushing valve only to initiate a large flush from the said first and the said second compartments simultaneously, a second push button being connected to actuate both the lever of the flushing valve and the lever of the flap simultaneously whereby to discharge water from the said first compartment.
6. A variable volume flushing cistern comprising, a body having a division wall across it to form a first compartment and a second compartment, a float in the said first compartment, a water inlet in the said second compartment connected to be actuated by the said float, a flushing valve in the said first compartment positioned to discharge water from the said first compart-ment and movable by an operating stem passing through the said division wall, a movable flap forming part of the said division wall to allow the said second compartment to be isolated from the said flushing valve in the said first compartment, and means connected to the said flushing valve and the said flap to actuate the said flushing valve only or the said flushing valve and the said flap together, whereby to initiate a large flush from both said compartments or a smaller flush from said first compartment, said division wall having a portion extending over the flushing valve and on one side extending upwardly and on the other side having a portion adapted to be engaged by the said flap, the said flap being hinged to the floor of the said body to define with the division wall the said first and the said second compartments, the said flushing valve being actuated by a first operating member and the said flap being actuated by a second operating member arranged to operate also the first operating member when the said second operating member is actuated.
7. A variable volume flushing cistern according to claim 6, wherein the said first and the said second opera-ting members are push buttons positioned adjacent to levers, said levers being carried by fulcrums supporting the said levers from the said body, the said lever of the said first push button being coupled to the said flushing valve by connecting means to operate it, the said lever of the second push button being coupled to the said flap by connecting means to operate it and connected to also simul-taneously operate the lever of the said first push button.
8. A variable volume flushing cistern according to claim 7, wherein the said connecting means between the said second lever and the said flap is a rod, said lever of the second push button being adjacent to the lever of the first push button, each said push buttons having a stem, the stem of the first said push button engaging the lever of the first push button, the stem of the second said push button engaging both said levers, whereby both levers are moved by the said second push button.
9. A variable volume flushing cistern comprising, a body having a division wall across the cistern body to form a first and second compartment;
a float located within the cistern body;
a water inlet valve within the cistern body to be actuated by the float, a flushing valve in the said first compartment positioned to discharge from the said first compartment and movable by an operating stem passing through said division wall;
a movable flap forming part of the said division wall to allow the said second compartment to be isolated from the said flushing valve in the said first compartment, first operating means connected to the said opera-ting stem to actuate the said flushing valve to initiate a large flush from both said compartments; and second operating means connected to said opera-ting stem to actuate the flushing valve and said flap to close the said flap to isolate the said second compartment from the said flushing valve, thus initiating a smaller flush from said first compartment, said division wall having a portion extending over the flushing valve and on one side extending upwardly and on the other side having a portion adapted to be engaged by said flap, the said flap being hinged to the floor of the said body to define with the division wall the said first and the second compartments, said first operating means comprising a first rotatable member, said first member being operated by a button connec-ted thereto, a second rotatable member positioned adjacent to said first member, said second member being coupled to the said operating stem by connecting means and said first member being adapted to engage with said second member whereby operation of the button causes the first member to rotate and engage the second member causing the second member to rotate to activate the operating stem to open the said flushing valve, and said second operating means com-prising a third rotatable member located adjacent the second member and remote from said first member, said third member being operated by a second button connected thereto and having a member projecting therefrom and adapted to engage a projection extending from said flap in the direc-tion of said first compartment, said third member being adapted to engage said second member whereby operation of the said second button causes the third member to rotate and engage the second member causing the second member to rotate and activate the operating stem to operate said flushing valve, while simultaneously the said member pro-jecting from the third member bears on the flap projection and closes said flap to isolate the said second compartment from the flushing valve to initiate a smaller flush from the said first compartment.
a float located within the cistern body;
a water inlet valve within the cistern body to be actuated by the float, a flushing valve in the said first compartment positioned to discharge from the said first compartment and movable by an operating stem passing through said division wall;
a movable flap forming part of the said division wall to allow the said second compartment to be isolated from the said flushing valve in the said first compartment, first operating means connected to the said opera-ting stem to actuate the said flushing valve to initiate a large flush from both said compartments; and second operating means connected to said opera-ting stem to actuate the flushing valve and said flap to close the said flap to isolate the said second compartment from the said flushing valve, thus initiating a smaller flush from said first compartment, said division wall having a portion extending over the flushing valve and on one side extending upwardly and on the other side having a portion adapted to be engaged by said flap, the said flap being hinged to the floor of the said body to define with the division wall the said first and the second compartments, said first operating means comprising a first rotatable member, said first member being operated by a button connec-ted thereto, a second rotatable member positioned adjacent to said first member, said second member being coupled to the said operating stem by connecting means and said first member being adapted to engage with said second member whereby operation of the button causes the first member to rotate and engage the second member causing the second member to rotate to activate the operating stem to open the said flushing valve, and said second operating means com-prising a third rotatable member located adjacent the second member and remote from said first member, said third member being operated by a second button connected thereto and having a member projecting therefrom and adapted to engage a projection extending from said flap in the direc-tion of said first compartment, said third member being adapted to engage said second member whereby operation of the said second button causes the third member to rotate and engage the second member causing the second member to rotate and activate the operating stem to operate said flushing valve, while simultaneously the said member pro-jecting from the third member bears on the flap projection and closes said flap to isolate the said second compartment from the flushing valve to initiate a smaller flush from the said first compartment.
10. A variable volume flushing cistern according to claim 9, wherein said first, second and third rotatable members are all carried by and rotatable about a single shaft and said first rotatable member has a projection which engages a projection on the second rotatable member to rotate said second rotatable member when said first rotat-able member is rotated and said third rotatable member has a projection which engages another projection on the second rotatable member to rotate said rotatable member when said third rotatable member is rotated.
11. A variable volume flushing cistern according to claims 9 and 10, wherein said operating stem is hollow and extends above the water level in said cistern, said hollow operating stem extending through said flushing valve to serve as an overflow during any malfunction of the said float actuated water inlet valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA347,369A CA1129153A (en) | 1980-03-10 | 1980-03-10 | Variable volume flushing cistern |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA347,369A CA1129153A (en) | 1980-03-10 | 1980-03-10 | Variable volume flushing cistern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1129153A true CA1129153A (en) | 1982-08-10 |
Family
ID=4116448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA347,369A Expired CA1129153A (en) | 1980-03-10 | 1980-03-10 | Variable volume flushing cistern |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1129153A (en) |
-
1980
- 1980-03-10 CA CA347,369A patent/CA1129153A/en not_active Expired
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| MKEX | Expiry |