GB2606835A

GB2606835A - Inlet valve

Info

Publication number: GB2606835A
Application number: GB2203225.4A
Authority: GB
Inventors: Dudley Martin; Carter Tyron
Original assignee: Thomas Dudley Ltd
Current assignee: Thomas Dudley Ltd
Priority date: 2021-03-11
Filing date: 2022-03-08
Publication date: 2022-11-23
Also published as: GB202103362D0; GB202203225D0

Abstract

A kit of parts for assembly into an inlet valve 1 for a toilet cistern comprising an inlet pipe 2 having a series of segments 20 which are removable to reduce the length of the pipe, the last segment in the series of segments defining a first end of the inlet pipe, a valve 3 having an inlet with a pipe fitting 32 for connection with the first end of the inlet pipe. The kit also includes mounting means 26 for sealingly mounting the inlet pipe within a hole through the base of the cistern and an actuator 4 for closing the valve in use, wherein the pipe fitting is configured to selectively engage the segment describing the first end of the inlet pipe in any one of a plurality of different working orientations about the inlet pipe. Preferably the segments are frangible and are separated by use of a tool. Further disclosed is a method of adapting an inlet valve directed to the kit of parts.

Description

INLET VALVE

This invention relates generally to inlet valve assemblies for cisterns. More specifically, although not exclusively, this invention relates to inlet valve assemblies which selectively introduce water into toilet cisterns from above the fill level.

Inlet valves are well known for filling toilet cisterns following a flushing event. Such valves generally operate automatically in response to the level of water within the cistern. This, automatic operation is usually performed using a float that closes the valve as the fill level rises to a predetermined level. One common and reliable inlet valve design used for this purpose is a diaphragm valve. However, this invention is not limited to such an inlet valve designs.

GB1588216, for example, describes an equilibrium valve, which includes a body with an inlet, an outlet, a valve mechanism with a seat in the body between the inlet from the outlet and a flexible diaphragm on the downstream side of the seat. The diaphragm is deformable to seal against the seat and carries an insert having a through aperture with a monitoring pin therein to keep the aperture clear and to restrict flow therethrough to a slow bleed. The diaphragm divides a pressure chamber defined within the body into a first part, which includes the seat, and a second part. The pressure chamber acts in conjunction with the slow bleed to keep water pressure on opposite faces of the diaphragm substantially in equilibrium so that only a small pressure differential operates the valve mechanism. A float carried on a lever applies closing force to a second bleed aperture in the second part of the pressure chamber such that, when the float drops, the second bleed aperture opens, thereby dropping pressure in the second side and displacing the diaphragm from the seat to allow inflow to the cistern.

The various styles of toilets, cisterns and mains water configurations that exist in water closet installations have necessitated a corresponding variety of inlet valve assemblies. In the United Kingdom, there are now two standard configurations for the supply of mains water into the cistern. These are referred to as "side-entry" and "bottom-entry" configurations. The first, "side-entry" configuration requires the fluid connection to the inlet valve to pass through a side wall of the cistern, above the intended fill level. The second, "bottom-entry" configuration requires the fluid connection to the inlet valve to pass through a bottom wall of the cistern, below the intended fill level. Inlet valve assemblies are generally configured for one of these two configurations.

Known "bottom-entry" inlet valve assemblies fall generally into two categories linked to the position of the outlet. The outlet in the first of these categories is below the fill level, whilst the outlet in the second category is above the fill level. Inlet valve assemblies with an outlet below the fill level are advantageous in that they reduce substantially the noise generated by the filling operation.

It is also known to provide "bottom-entry" inlet valve assemblies with height adjustability. This enables the same inlet valve to be used in a range of different cistern installations.

io One example of such a height-adjustable inlet valve is described in US4100928, which includes telescoping inner and outer tubes. The outer tube includes an internally extending radial projection that engages a continuous helical groove in the outer surface of the inner tube to enable continuous adjustment. The telescoping tubes are secured together at a desired position by a locking collar.

One non-exclusive aim of the invention is to provide an improved inlet valve, preferably one that is reliable, robust and less prone to failure.

Accordingly, a first aspect of the invention provides an inlet valve, or a kit of parts for assembly into an inlet valve, which comprises an inlet pipe and a valve connected or connectable to an end of the inlet pipe, wherein part of the inlet pipe can be removed to adjusting the position of the valve within the cistern.

Thus, the inlet valve may have an adjustable height, whilst replicating the reliability of non-adjustable inlet valves.

The inlet pipe may have a series of portions or segments, hereinafter segments. The segments may be removable, e.g. to reduce the length of the inlet pipe. The last segment in the series may describe the first end of the inlet pipe.

The kit or inlet valve may comprise a mounting means, e.g. for sealingly mounting the inlet pipe within a hole through the base of a cistern. The end of the inlet pipe to which the valve is connected or connectable may comprise a first end. The mounting means may be at or adjacent a second end of the inlet pipe.

The kit or inlet valve may comprise an actuator, e.g. for closing, in use, the valve when water in the cistern reaches a predetermined level.

The valve may have an inlet. The valve or inlet may comprise a pipe fitting, e.g. for connection with the end of the pipe. The pipe fitting may be configured to selectively engage the segment describing the first end of the inlet pipe, e.g. in any one of a plurality of different working orientations about a longitudinal axis of the inlet pipe.

For the avoidance of doubt, the term "working orientation" refers to an orientation of the io valve relative to the longitudinal axis of the inlet pipe in which the valve is in full sealing engagement with the inlet pipe. For example, where the inlet pipe is fixed within a cistern, the valve may be operatively connected to the end of the inlet pipe in any such working orientation. This enables the orientation of the valve to be adjusted between such working orientations, so as to avoid any interference between the actuator (typically in the form of a float operated actuator) and an adjacent wall of the cistern.

Another aspect of the invention provides an inlet valve, or a kit of parts for assembly into an inlet valve, which comprises: an inlet pipe having a series of segments which are removable to reduce the length of the inlet pipe, the last segment in the series of segments describing a first end of the inlet pipe; a valve having an inlet with a pipe fitting for connection with the first end of the inlet pipe; mounting means for sealingly mounting the inlet pipe within a hole through the base of a cistern at or adjacent a second end of the inlet pipe; and an actuator for closing, in use, the valve when water in the cistern reaches a predetermined level; wherein the pipe fitting of the valve is configured to selectively engage the segment describing the first end of the inlet pipe in any one of a plurality of different working orientations about a longitudinal axis of the inlet pipe.

The different working orientations may be spaced equally about the longitudinal axis of the inlet pipe. In some examples, the different working orientations include a first orientation and/or a second orientation. The second orientation may be diametrically opposite the first orientation. The first and second orientations may be spaced by 1800 from one another.

The different working orientations may include a third orientation. The first, second and third orientations may be spaced, e.g. spaced equally, by 1200 from one another. The different working orientations may include a fourth orientation. The first, second, third and fourth orientations may be spaced, e.g. spaced equally, by 900 from one another. In some examples, the second orientation is diametrically opposite the first orientation and/or the fourth orientation is diametrically opposite the third orientation. In such examples, the third and/or fourth orientation may be at 900 to the first and/or second orientations.

In some examples, the different working orientations are not spaced unequally. In such cases, the different working orientations may include two orientations, which may be spaced by between 100 and 1800, such as between 20° and 150°, for example approximately 30°, 60°, 90° or 120°.

The different working orientations may comprise any orientation about the longitudinal axis of the inlet pipe. In some examples, the orientation of the valve about the longitudinal axis of the inlet pipe may be adjustable continuously.

Adjacent segments may be delineated, e.g. from one another, by markers, preferably notches, depressions or grooves in the inlet pipe. The or each notch, depression or groove may comprise or provide a frangible connection between adjacent segments. Each notch, depression or groove may be provided by a necked portion of the inlet pipe. The or each necked portion may connect adjacent segments to one another, e.g. for facilitating their removal. The or each necked portion may comprise or provide a frangible connection between adjacent segments.

Each segment may comprise one or more annular features, e.g. with which the valve or the pipe fitting thereof engages to mount the valve to the inlet pipe. For the avoidance of doubt, the term "annular" in relation to a feature, portion or surface is non-helical and excludes a helical feature, portion or surface.

The or each annular feature may comprise a part-annular feature. The or each annular feature may comprise the or a notch, depression or groove. In such examples, the necked portion may be described by an annular depression or groove, with which the pipe fitting of the valve may engage to mount the valve to the inlet pipe.

Alternatively, the or each annular feature may comprise a projection, such as an annular or part annular tab, tooth or barb. The valve or pipe fitting may comprise a complementary shaped recess, opening, tab, tooth or barb for engaging the annular or part-annular tab, tooth or barb.

Where the annular feature(s) comprise part-annular feature(s), each segment may comprise a plurality of part-annular features spaced or distributed, e.g. spaced or distributed equally, about its periphery. For example, if each segment has two part-annular features, these may be on diametrically opposite sides. In such a case, the inlet valve may comprise two working orientations. Similarly, if each segment has three part-annular features, these may be spaced by 1200 about its periphery. In such a case, the inlet valve may comprise io three working orientations. If each segment has four part-annular features, these may be spaced by 900 about its periphery, corresponding to four working orientations of the inlet valve, and so on.

The pipe fitting may comprise a compression coupling. The compression coupling may comprise an inner sleeve, e.g. for receiving the first end of the inlet pipe. The inner sleeve may comprise sealing means or a seal, such as an 0-ring seal. The compression coupling may comprise an outer sleeve, e.g. for compressing the inner sleeve against the inlet pipe. The inner sleeve may comprise a tapered outer surface, e.g. for engagement with a tapered inner surface of the outer sleeve. The outer sleeve may be movable to lock or engage the tapered surfaces of the inner and outer sleeves, thereby to compress the inner sleeve onto the inlet pipe.

The outer sleeve may threadedly engage the valve, the inlet thereof or the inner sleeve. Rotation, in use, of the outer sleeve may cause the outer sleeve to translate relative to the inner sleeve and/or along the longitudinal axis of the inlet pipe. Rotation, in use, of the outer sleeve may cause the outer sleeve to engage the inner sleeve. Rotation, in use, of the outer sleeve may cause the inner tapered surface of the outer sleeve to engage the outer tapered surface of the inner sleeve. Rotation, in use, of the outer sleeve may cause the outer sleeve to compress an inner sleeve of the pipe fitting against the first end of the inlet pipe.

The pipe fitting may comprise a push fit coupling. The push fit coupling may comprise a collar or ring or one or more barbs that enable the inlet pipe to be inserted into the pipe fitting, but inhibit its removal. The collar or ring or barb(s) may be configured or operable to engage an outer surface of the inlet pipe, e.g. upon removal or attempted removal of the inlet pipe from the pipe fitting. The collar or ring or barb(s) may be configured or operable to engage the annular feature, notch, depression or groove in or of the inlet pipe.

The pipe fitting may comprise a bayonet coupling. The bayonet coupling may be configured to cooperate with a plurality of part-annular features of the segment describing the first end of the inlet pipe. The bayonet coupling may comprise one or more recesses, openings, tabs, teeth or barbs, which may extend inwardly and/or may be for engaging a corresponding one or more tabs, teeth or barbs of the inlet pipe. The bayonet coupling may comprise a sleeve, e.g. an outer sleeve, which may comprise the recess(es), opening(s), tab(s) tooth(teeth) or bar(s). Each segment of the inlet pipe may comprise a corresponding one or more tabs, teeth or barbs of the inlet pipe. As such, each segment of the inlet pipe is capable of engaging with the bayonet coupling, e.g. if it comprises the segment describing the first end of the inlet pipe.

The bayonet coupling or the sleeve thereof may be rotatable, for example relative to the inlet pipe and/or relative to the valve, between a first, unlocked orientation and a second, locked orientation. The inlet pipe may be insertable into and removable from the bayonet coupling or sleeve in the first, unlocked orientation. Removal of the inlet pipe from the bayonet coupling or sleeve may be prevented or inhibited when the bayonet coupling or sleeve is in the second, unlocked orientation. The one or more tabs, teeth or barbs of the inlet pipe may comprise a tapered or angled portion or surface, which may urge the inlet pipe into the pipe fitting, bayonet coupling or sleeve, e.g. when the pipe fitting, bayonet coupling or sleeve is rotated from the unlocked orientation toward the locked orientation. The one or more tabs, teeth or barbs of the inlet pipe may comprise a circumferential portion or surface for engaging a corresponding surface of the pipe fitting, bayonet coupling or sleeve, e.g. thereby to prevent or inhibit removal of the inlet pipe from the pipe fitting, bayonet coupling or sleeve when it is in the locked orientation.

The pipe fitting may comprise a snap fit coupling. The snap fit coupling may be configured to cooperate with a plurality of annular or part-annular features of the segment describing the first end of the inlet pipe. The snap fit coupling may comprise one or more recesses, openings, tabs, teeth or barbs, which may extend inwardly and/or may be for engaging a corresponding one or more tabs, teeth or barbs of the inlet pipe. The snap fit coupling may comprise a sleeve, e.g. an outer sleeve, which may comprise the recess(es), opening(s), tab(s) tooth(teeth) or bar(s).

The sleeve may comprise one or more axial slots and/or may comprise a split collet, e.g. to enable the recess(es), opening(s), tab(s) tooth(teeth) or bar(s) of the snap fit coupling or sleeve to be urged over the recess(es), opening(s), tab(s) tooth(teeth) or bar(s) of the segment of the inlet pipe, e.g. by applying a force along the longitudinal axis of the inlet pipe. Each segment of the inlet pipe may comprise a corresponding one or more tabs, teeth or barbs of the inlet pipe. As such, each segment of the inlet pipe is capable of engaging with the snap fit coupling, e.g. if it comprises the segment describing the first end of the inlet pipe.

In some examples, the inlet valve or kit comprises a sealing tube, e.g. for providing a sealed connection between the inlet pipe or the first end thereof and the valve or its inlet. The sealing tube may comprise a first portion, e.g. for sealingly engaging the inlet pipe, and/or a second portion, e.g. for sealingly engaging the inlet of the valve. The first and/or second portions may be tubular. The sealing tube may comprise a flange, e.g. a central flange. The first and/or second portions may each extend from a side, e.g. a respective side, of the flange. The first and/or second portion may comprise a sealing means, e.g. for sealing connection with the inlet pipe and/or with the valve. The sealing means may comprise a seal, such as an 0-ring. The or each seal may be received within a groove. The or each groove may be on an outer surface of the first or second portion, e.g. where the sealing tube is to be inserted within the inlet pipe and/or valve. The or each groove may be on an inner surface, e.g. where the inlet pipe or the inlet of the valve is to be inserted therein.

The pipe fitting or snap fit coupling may comprise a clip, for example a C-clip. The clip may be configured to cooperate with an annular or part-annular feature, e.g. of the segment describing the first end of the inlet pipe. The annular or part-annular feature may comprise a groove. The clip may be configured to cooperate with an annular or part-annular groove of the segment describing the first end of the inlet pipe. The annular groove may describe the or a necked portion, which may connect the segments describing the first end of the inlet pipe to an adjacent segment. The clip may be at least partially received within a slot in or through the valve or a stem thereof.

The clip may be operable or movable into and/or out of engagement with the inlet pipe or annular or part-annular feature or groove. The clip may be operable or movable between locked and unlocked positions or conditions. The locked position or condition may comprise or correspond to a position or condition of the clip when it is in engagement with the inlet pipe or annular or part-annular feature or groove. The unlocked position or condition may comprise or correspond to a position or condition of the clip when it is out of engagement with the inlet pipe or annular or part-annular feature or groove. The clip may comprise a gripping feature or flange, for example to enable or facilitate its operation or movement, e.g. between the locked and unlocked positions or conditions.

When the inlet valve is provided in kit form, the kit may comprise a tool, e.g. for removing one or more of the segments of the inlet pipe. The tool may comprise a pair of pliers, e.g. io for breaking one or more of the segments from the rest of the inlet pipe. The tool may comprise cutting means, such as a pipe cutter or saw, e.g. for cutting one or more of the segments from the rest of the inlet pipe.

The kit, inlet valve, inlet pipe or mounting means may comprise a mounting flange at or adjacent its first end. The first end of the inlet pipe may be threaded or comprise a thread, e.g. an external thread. The thread of the inlet pipe may extend from the first end to the mounting flange. The kit, inlet valve, inlet pipe or mounting means may comprise a mounting nut, e.g. for threaded engagement with the thread at the first end of the inlet pipe. The kit or mounting means may be configured to captivate, in use, the bottom of a cistern between the flange and the mounting nut.

The valve may comprise a float valve or a float operated valve. The kit, inlet valve or actuator may comprise a float, which may be mounted, e.g. pivotally mounted, to the valve. The valve may comprise an outlet, which may be located, in use, above the float when the inlet valve is installed in a cistern. The float may be operable in use, e.g. in response to a rising water level, to open or close the valve. The float may comprise an open position or condition, for example when the float is in a lowered position. The float may comprise a closed position or condition, for example when the float is in a raised position.

The float may be pivotally mounted to the valve by a lever. The float may be adjustably, e.g. stepwise adjustably, mounted to the lever. The lever may be pivotally mounted to the valve. The lever may comprise a stop for selectively closing the valve when the float is in the raised or closed position or condition. The stop may be spaced or unseated when the float is in the lowered or open position or condition.

The float may describe or control the intended fill level. Other actuation mechanisms are also envisaged without departing from the scope of the invention. Such actuation mechanisms may describe or control the intended fill level.

Another aspect of the invention provides a method of adapting an inlet valve for a toilet cistern, e.g. an inlet valve as described above. The method may comprise any one or more steps relevant to the assembly of the inlet valve. In particular, the method may comprise removing one or more segments of a series of segments of an inlet pipe, e.g. to reduce its length and/or such that the last segment in the series describes a first end of the inlet pipe.

For the avoidance of doubt, any of the features described herein apply equally to any aspect of the invention. For example, the inlet valve and/or kit may comprise any one or more features of the method relevant thereto and/or the method may comprise any one or more steps relevant to the inlet valve and/or kit.

The method may comprise connecting a pipe fitting of an inlet valve to the inlet pipe, e.g. by engaging the segment describing the first end of the inlet pipe. Connecting the pipe fitting to the inlet pipe may be in any one of a plurality of different working orientations about a longitudinal axis of the inlet pipe.

The method may comprise mounting, e.g. sealingly mounting, the inlet pipe within a hole through the base of a cistern at or adjacent a second end of the inlet pipe. The method may comprise connecting to the inlet valve an actuator, e.g. for closing the valve when water in the cistern reaches a predetermined level.

Another aspect of the invention provides a method of adapting an inlet valve for a toilet cistern, the method comprising: removing one or more segments of a series of segments of an inlet pipe to reduce its length, such that the last segment in the series describes a first end of the inlet pipe; connecting a pipe fitting of an inlet valve to the inlet pipe by selectively engaging the segment describing the first end of the inlet pipe in any one of a plurality of different working orientations about a longitudinal axis of the inlet pipe; sealingly mounting the inlet pipe within a hole through the base of a cistern at or adjacent a second end of the inlet pipe; and connecting to the inlet valve an actuator for closing the valve when water in the cistern reaches a predetermined level.

The method may comprise urging the inlet pipe into the pipe fitting of the valve, e.g. using an axial force along the longitudinal axis of the inlet pipe. Urging the inlet pipe into the pipe fitting may sealingly connect the pipe fitting to the first end of the inlet pipe.

The method may comprise rotating the valve, the pipe fitting or an outer sleeve of the pipe fitting. Rotation of the valve, pipe fitting or outer sleeve may compress an inner sleeve of the pipe fitting against the first end of the inlet pipe. The pipe fitting may comprise a compression coupling. Rotating the valve, pipe fitting or outer sleeve may engage a part-annular tab of the of the segment describing the first end of the inlet pipe. The pipe fitting io may comprise a bayonet coupling.

Urging the inlet pipe into the pipe fitting may cause the pipe fitting to engage an annular feature of the inlet pipe. The annular feature of the inlet pipe may be an annular feature of the segment describing the first end of the inlet pipe. Engaging the annular feature of the inlet pipe may inhibit removal of the inlet valve from the inlet pipe.

Urging the inlet pipe into the pipe fitting may cause a collar or ring or one or more barbs of the pipe fitting to engage the pipe, e.g. an annular groove of the inlet pipe. The annular groove may describe a necked portion which connects the segment describing the first end of the inlet pipe to an adjacent segment. The pipe fitting may comprise a push fit coupling.

Urging the inlet pipe into the pipe fitting may cause one or more recesses, openings, tabs, teeth or barbs of the pipe fitting to pass over and/or engage recesses, openings, tabs, teeth or barbs of the inlet pipe or the segment describing the first end of the inlet pipe. Urging the inlet pipe into the pipe fitting may cause one or more engaging teeth of the pipe fitting to pass over and/or engage one or more engaging teeth of the segment describing the first end of the inlet. The pipe fitting may comprise a snap fit coupling.

The method may comprise inserting a sealing tube between the inlet pipe and the valve or pipe fitting, e.g. to provide a sealed connection therebetween.

The method may comprise urging a clip into engagement with the inlet pipe. The method may comprise urging a clip into engagement with an annular or part-annular feature, e.g. of the segment describing the first end of the inlet pipe. The annular or part-annular feature may comprise a groove. The annular groove may describe the or a necked portion, which may connect the segments describing the first end of the inlet pipe to an adjacent segment.

The method may comprise operating or moving the clip into and/or out of engagement with the inlet pipe or annular or part-annular feature or groove. The method may comprise operating or moving the clip between locked and unlocked positions or conditions. The locked position or condition may comprise or correspond to a position or condition of the clip when it is in engagement with the inlet pipe or annular or part-annular feature or groove. The unlocked position or condition may comprise or correspond to a position or condition to of the clip when it is out of engagement with the inlet pipe or annular or part-annular feature or groove. The method may comprise operating or moving the clip using a gripping feature or flange thereof.

The method may comprise removing the one or more segments by breaking or severing the segments form the inlet pipe. The method may comprise using a tool to remove, break or sever one or more segments from the inlet pipe.

Another aspect of the invention provides a computer program element comprising and/or describing and/or defining a three-dimensional design, e.g. of the inlet valve described above, an embodiment thereof or any component thereof. The three-dimensional design may be for use with a simulation means or an additive or subtractive manufacturing means, system or device.

The computer program element may be for causing, or operable or configured to cause, an additive or subtractive manufacturing means, system or device to manufacture the inlet valve described above, an embodiment thereof or any component thereof. The computer program element may comprise computer readable program code means for causing an additive or subtractive manufacturing means, system or device to execute a procedure to manufacture the inlet valve described above, an embodiment thereof or any component thereof.

Another aspect of the invention provides the computer program element embodied on a computer readable medium.

Within the scope of this application it is expressly intended that the various aspects, embodiments, examples and alternatives set out in the preceding paragraphs, in the claims and/or in the following description and drawings, and in particular the individual features thereof, may be taken independently or in any combination. That is, all embodiments and/or features of any embodiment can be combined in any way and/or combination, unless such features are incompatible.

For the avoidance of doubt, the terms "may", "and/or", "e.g.", "for example" and any similar term as used herein should be interpreted as non-limiting such that any feature so-w described need not be present. Indeed, any combination of optional features is expressly envisaged without departing from the scope of the invention, whether or not these are expressly claimed. The applicant reserves the right to change any originally filed claim or file any new claim accordingly, including the right to amend any originally filed claim to depend from and/or incorporate any feature of any other claim although not originally is claimed in that manner.

Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings in which: Figure 1 illustrates an inlet valve according to an example, in which the valve includes a compression coupling that is shown disconnected from the inlet pipe; Figure 2 is a section view of part of the inlet valve of Figure 1, showing the compression coupling of the valve connected to the end of the inlet pipe; Figure 3 illustrates an inlet valve according to another example, in which the valve includes a push fit coupling that is shown disconnected from the inlet pipe, Figure 4 is a section view of part of the inlet valve of Figure 3, showing the push fit coupling of the valve connected to the end of the inlet pipe; Figure 5 illustrates an inlet valve according to another example, in which the valve includes a bayonet coupling that is shown disconnected from the inlet pipe; Figure 6 is a section view of part of the inlet valve of Figure 5, showing the bayonet coupling of the valve connected to the end of the inlet pipe; Figure 7 illustrates an inlet valve according to another example, in which the valve includes a snap fit coupling that is shown disconnected from the inlet pipe; Figure 8 is a section view of part of the inlet valve of Figure 7, showing the snap fit coupling of the valve connected to the end of the inlet pipe; and io Figure 9 illustrates an inlet valve according to yet another example, in which the valve includes a C-clip coupling that is shown disconnected from the inlet pipe.

Referring now to Figures 1 and 2, there is shown an inlet valve 1, which is only partially assembled and has some conventional features omitted for clarity. The inlet valve 1 according to this example includes an inlet pipe 2, a valve 3 for connection with the inlet pipe 2 and an actuator 4 operatively connected to the valve 3.

The inlet pipe 2 includes a series of segments 20 joined together in series by a necked portions 21. Each necked portion 21 provides a frangible connection, which can be broken to adjust the length of the inlet pipe 2. The last segment 20 in the series of segments 20 describes a first end 25 of the inlet pipe 2.

The inlet pipe 2 also includes a second end 26 mounting means 27 of the inlet pipe 2 for sealingly mounting it within a hole (not shown) through the base of a cistern (not shown).

The mounting means 27 includes a radial flange 28 with a threaded stem 29 extending from the radial flange 28. The mounting means 27 in this example also includes a nut (not shown) that engages the threaded stem 29 to captivate a base wall of the cistern (not shown) between it and the radial flange 28.

In this example, the inlet pipe 2 includes a straight, featureless portion between the segments 20 and the mounting means 27. However, it is also envisaged that this section could include additional segments 20.

The valve 3 includes an outlet (not shown) for filling the cistern and an equilibrium valve, similar to that which is described in GB1588216, housed within a housing 30. The valve 3 also includes an inlet 31 and a pipe fitting 32 in the form of a compression coupling 32. The compression coupling 32 includes an inner sleeve 33, which receives the first end 25 of the inlet pipe 2, and an outer sleeve 34 that surrounds the inner sleeve 33.

The inner sleeve 33 has an internal step against which the first end 25 of the inlet pipe 2 abuts and an annular sealing element 35 adjacent the step for engaging an outer surface of the inlet pipe 2. The outer sleeve 34 in this example threadedly engages a stem 36 that depends from the housing 30 and describes the inlet 31 of the valve 3.

lc) The inner sleeve 33 has an outer tapered surface 33a and the outer sleeve 34 has an inner tapered surface 34a. The tapered surfaces 33a, 34a cooperate with one another when the outer sleeve 34 is moved axially toward the housing 30 of the valve. More specifically, when the outer sleeve 34 is rotated relative to the stem 36 the threaded connection causes the outer sleeve 34 to translate toward the housing 30. This causes the tapered surfaces 33a, 34a to engage and cause the inner sleeve 33 to compress against the inlet pipe 2.

The actuator 4 includes and a float (not shown) pivotally mounted to the valve 3 by a lever 40. The float (not shown) is operable, in response to a rising water level, to open or close the valve 3 in the usual way. The float (not shown) is connected to the lever 40 by an adjustable connection, which enables fine tune adjustment of the water level in the usual way.

In use, appropriate measurements are taken of a cistern (not shown) into which the inlet valve 1 is to be mounted. The appropriate height of the inlet pipe 2 is determined, based on these measurements, and one or more of the segments 20 are removed to adjust the length of the inlet pipe 2 to suit the cistern (not shown). Removal of the segment(s) 20 can be carried out in this example by breaking the inlet pipe 2 at the appropriate necked portion 21. This can be achieved using an appropriate tool, for example pliers (not shown). Other means of severing the segments 20 are also envisaged.

With the inlet pipe 2 length adjusted, it can either be installed into the cistern (not shown) before the valve 3 is installed on to the inlet pipe 2, or the valve 3 may be installed onto the inlet pipe 2 before the assembly is installed in the cistern (not shown).

Installation of the inlet pipe 2 within the cistern (not shown) is carried out in the usual way, by inserting the threaded stem 29 into the hole (not shown) of the cistern (not shown), installing the nut (not shown) on the threaded stem 29 and captivating the base wall of the cistern (not shown) between the nut (not shown) and the radial flange 28.

Installing the valve onto the inlet pipe 2 is achieved by inserting the segment 20 of the inlet pipe 2 describing its first end 25 (after the requisite segments 20 have been removed), into the inner sleeve 33 of the compression coupling 32 of the valve 3 until it abuts the internal step and the sealing element 35 engages an outer surface of the inlet pipe 2. The outer io sleeve 34 is then rotated relative to the stem 36 to engage the tapered surfaces 33a, 34a, and cause the inner sleeve 33 to compress against the inlet pipe 2.

It will be appreciated that the use of a compression coupling 32 enables the valve 3, and therefore the float (not shown) of the actuator 4, to be adjusted to any desired orientation about a longitudinal axis of the inlet pipe 2. In each of these orientations, the compression coupling 32 can be operated to engage completely the inlet pipe 2, thereby to ensure a sealed and secure connection. Thus, each of these, infinite orientations can be referred to as working orientations. This enables fine tune adjustment of the orientation of the valve 3 and actuator 4 after the inlet pipe 2 is installed in the cistern. The vertical position of the float (not shown) may also be adjusted in the usual way.

It will be appreciated that the inlet valve 1 may be provided in a preassembled form, but can be disassembled to adjust the length of the inlet pipe 2. Alternatively, the inlet valve 1 can be provided in kit form, as illustrated, or further disassembled, for example with the actuator 4 removed.

Referring now to Figures 3 and 4, there is shown an inlet valve 101 similar to the valve 1 described above, wherein like features are depicted with like reference numbers incremented by 100, which will not be described further. The inlet valve 101 according to this example differs from the aforementioned valve 1 in that the compression coupling 32 of the previous example is replaced with a push fit coupling 132 in this example.

The push fit coupling 132 includes a collar 134 and 0-ring seal 135 both captivated within the stem 136 that depends from the housing 130 and describes the inlet 131 of the valve 103. In this example, the collar 134 includes a radial flange and teeth (not shown) that engage the outer surface of the first end 125 of the inlet pipe 102. As will be appreciated by the skilled person, the collar 134 has a tapered external surface (not shown) that causes the teeth (not shown) to engage the inlet pipe 102 when a removal force is exterted on the pipe 102. In some examples, the collar 134 may have one or more internal projections configured to engage the groove describing the necked portion 121 joining the segment describing the first end 125 of the inlet pipe 102 to the next segment 120 in the series.

In use, installation of the inlet valve 101 into a cistern (not shown) is carried out in a similar manner to that described above in relation to the inlet valve 1 of Figures 1 and 2. However, io installation of the valve 103 onto the inlet pipe 102 is carried out simply by urging the inlet pipe 102 into the stem 136 until the collar 134 and 0-ring seal 135 surround the segment 120 describing the first end 125 of the inlet pipe 102. In this position, the 0-ring seal 135 sealingly engages the inlet pipe 102, and the collar 134 prevents or inhibits removal of the inlet pipe 102 from the push fit coupling 132. The inlet pipe 102 may be removed by urging the collar 134 into the stem 136 to disengage the teeth (not shown) from the inlet pipe 102, before applying a removal force to the inlet pipe 102.

As with the inlet valve 1 of Figures 1 and 2, the inlet pipe 102 may be installed into the cistern (not known) before or after the valve 103 is connected to it, the valve 103 and actuator 104 can be adjusted to any desired working orientation about a longitudinal axis of the inlet pipe 102 and the vertical position of the float (not shown) may also be adjusted in the usual way. Moreover, the inlet valve 101 may be provided in a preassembled form or in kit form, either as illustrated or further disassembled.

Referring now to Figures 5 and 6, there is shown an inlet valve 201 similar to the valve 1 of Figures 1 and 2 described above, wherein like features are depicted with like reference numbers incremented by 200, which will not be described further. The inlet valve 201 according to this example differs from the aforementioned valve 1 in that the compression coupling 32 of the previous example is replaced with a bayonet coupling 232 that engages with tabs 222 projecting from the inlet pipe 202 in this example.

Each segment 220 of the inlet pipe 202 includes four of the tabs 222, which are spaced equally about its periphery and which project radially therefrom. Each tab 222 includes a part-annular portion 223 and an angled or tapered portion 224 extending from the part-annular portion 223 at an angle, toward the first end 225.

The bayonet coupling 232 includes an annular recess 233 and four equally spaced tabs 234 projecting inwardly from end of the stem 236 that depends from the housing 230. The annular recess 233 accommodates the four tabs 222 of the segment 220 forming the first end 225 of the inlet pipe 225, while the tabs 234 delineate the annular recess 233 for engaging the tabs 222 of the inlet pipe 202. The bayonet coupling 232 also includes an annular face seal 235 for engaging the first end 225.

In use, installation of the inlet valve 201 into a cistern (not shown) is carried out in a similar io manner to that described above in relation to the inlet valve 1 of Figures 1 and 2. However, to engage the bayonet coupling 232 with the inlet pipe 202, the segment 220 describing the first end 225 of the inlet pipe 202 is oriented with the tabs 222 aligned with the spaces between the tabs 234 of the bayonet coupling 232 and then the segment 220 is inserted into the bayonet coupling 232. The bayonet coupling 232 is then rotated so that the tabs 234 thereof engage the tapered portion 224 of the tabs 222 of the inlet pipe 202, which urges the inlet pipe 202 further into the bayonet coupling 232 and into engagement with the face seal 235. When the tabs 234 of the bayonet coupling 232 engage the part-annular portion 223 of the tabs 222 of the inlet pipe 202, this sealed connection is maintained and continued rotation locks the valve 203 into position relative to the inlet pipe 202.

As with the inlet valve 1 of Figures 1 and 2, the inlet pipe 202 may be installed into the cistern (not known) before or after the valve 203 is connected to it. However, the skilled person will appreciate that there are only four working orientations in this example. These correspond to the number of tabs 222, 234. It will be appreciated that the number of working orientations may be increased or decreased simply by increasing or decreasing the number of tabs 222, 234. As with the inlet valves 1, 101 described above, however, the vertical position of the float (not shown) may also be adjusted in the usual way and the inlet valve 201 may be provided in a preassembled form or in kit form, either as illustrated or further disassembled.

Referring now to Figures 7 and 8, there is shown an inlet valve 301 similar to the valve 1 of Figures 1 and 2 described above, wherein like features are depicted with like reference numbers incremented by 300, which will not be described further. The inlet valve 301 according to this example differs from the aforementioned valve 1 in that the compression coupling 32 of the previous example is replaced with a snap fit coupling 332 that engages with teeth 322 projecting from the inlet pipe 302 in this example. The inlet valve 301 also includes a sealing tube 305 for ensuring a reliable seal between the inlet pipe 302 and the inlet 331 of the valve 303.

The inlet pipe 302 includes a series of notches 321, which extend through a substantial portion of the thickness of the inlet pipe 302. The notches 321 are not spaced equally in this example, but in alternative examples they could be spaced equally. Indeed, the notches 321 may also extend around the entire periphery of the inlet pipe 302, thereby providing a necked portion of the inlet pipe similar to the inlet valves 1, 101, 201 of previous examples.

The stem 336 that depends from the housing 330 includes a series of slots 336a, which separate the stem 336 into deformable portions 336b. Each deformable portion 336b includes a series of teeth 334 projecting inwardly therefrom for engagement with the teeth 322 of the inlet pipe 302.

The sealing tube 305 includes a first tubular portion 350 for sealingly engaging the inlet pipe 302, a second tubular portion 351 for sealingly engaging the inlet 331 of the valve 303 and a central flange 352 between the tubular portions 350, 351. Each tubular portion 350, 351 includes a respective circumferential groove within which a respective 0-ring 353, 354 is received for providing a sealed connection.

In use, installation of the inlet valve 301 into a cistern (not shown) is carried out in a similar manner to that described above in relation to the inlet valve 1 of Figures 1 and 2. However, to engage the snap fit coupling 332 with the inlet pipe 302, the first tubular portion 350 is inserted into the first end 325 of the inlet pipe 302 and the stem 336 is urged over it, such that the teeth 334 of the deformable portions 336b are urged over the teeth 322 of the segment 320 describing the first end 325 of the inlet pipe 302. This is achieved by applying an axial force to the valve 303 until the central flange 352 of the sealing tube 305 is captivated between the valve 303 and the inlet pipe 302. Engagement of the teeth 322, 334 prevents or inhibits removal of the inlet pipe 302 from the valve 303, and maintains the sealed connection.

As with the inlet valve 1 of Figures 1 and 2, the inlet pipe 302 may be installed into the cistern (not known) before or after the valve 303 is connected to it, the valve 303 and actuator 304 can be adjusted to any desired working orientation about a longitudinal axis of the inlet pipe 302 and the vertical position of the float (not shown) may also be adjusted in the usual way. Moreover, the inlet valve 301 may be provided in a preassembled form or in kit form, either as illustrated or further disassembled.

Referring now to Figure 9, there is shown an inlet valve 401 similar to the valve 1 of Figures 1 and 2 described above, wherein like features are depicted with like reference numbers incremented by 400, which will not be described further. The inlet valve 401 according to this example differs from the aforementioned valve 1 in that compression coupling 32 of the previous example is replaced with a C-clip coupling 432 in this example.

Similar to the inlet valve 101 of Figures 3 and 4, the C-clip coupling 432 includes an 0-ring seal (not shown) captivated within the stem 436 that depends from the housing 430 and describes the inlet 431 of the valve 403. However, the valve 401 according to this example includes a C-clip 434 extending through a radial slot 433, instead of the collar 134. The C-clip 434 includes a gripping flange 434a projecting orthogonally from the C-clip 434 at one of its ends.

The C-clip 434 releasably engages with one of the necked portions 421 joining the segment 420 describing the first end 425 of the inlet pipe 402 to the next segment 420 in the series, similar to the inlet valve 101 of Figures 3 and 4. A user can therefore urge the gripping flange 434a toward the stem 436 to push the C-clip 434 further into the stem 436 such that it engages resiliently the necked portion 421, thereby to lock the valve 403 on the inlet pipe 402. Conversely, the C-clip coupling 432 can be unlocked by pulling the gripping flange 434a away from the stem 436, which retracts the clip 434 partially from the stem 436 and disengages the necked portion 421, thereby releasing the valve 403 from the inlet pipe 402.

In use, installation of the inlet valve 401 into a cistern (not shown) is carried out in a similar manner to that described above in relation to the inlet valve 1 of Figures 1 and 2. However, after inserting the segment 420 of the inlet pipe 402 describing its first end 425 (once the requisite segments 420 have been removed), the valve 403 is locked on the inlet pipe 402 simply by urging the gripping flange 434a to move the C-clip 434 to the locked position, as described above. The 0-ring seal (not shown) seals the connection between the valve 403 and the inlet pipe 402. The inlet pipe 402 may then be removed by pulling the gripping flange 434a to move the C-clip 434 to the unlocked position, as described above.

As with the inlet valve 1 of Figures 1 and 2, the inlet pipe 402 may be installed into the cistern (not known) before or after the valve 403 is connected to it, the valve 403 and actuator 404 can be adjusted to any desired working orientation about a longitudinal axis of the inlet pipe 402 and the vertical position of the float (not shown) may also be adjusted in the usual way. The inlet valve 401 may also be provided in a preassembled form or in kit form, either as illustrated or further disassembled.

It will be appreciated by those skilled in the art that several variations to the aforementioned embodiments are envisaged without departing from the scope of the invention. For example, other designs of pipe fittings 32, 132, 232, 332, 432 are envisaged, the sealing tube 305 may be included in any one of the examples instead of direct sealing arrangements and the segments 20, 120, 220, 320, 420 need not be connected to one another by necked portions 21, 121, 221, 321, 421.

It will also be appreciated by those skilled in the art that any number of combinations of the aforementioned features and/or those shown in the appended drawings provide clear advantages over the prior art and are therefore within the scope of the invention described herein.

Claims

CLAIMS1. A kit of parts for assembly into an inlet valve for a toilet cistern, the kit comprising: an inlet pipe having a series of segments which are removable to reduce the length of the inlet pipe, the last segment in the series of segments describing a first end of the inlet pipe; a valve having an inlet with a pipe fitting for connection with the first end of the inlet pipe; mounting means for sealingly mounting the inlet pipe within a hole through the io base of a cistern at or adjacent a second end of the inlet pipe; and an actuator for closing, in use, the valve when water in the cistern reaches a predetermined level; wherein the pipe fitting of the valve is configured to selectively engage the segment describing the first end of the inlet pipe in any one of a plurality of different working orientations about a longitudinal axis of the inlet pipe.
The kit of parts of claim 1, wherein the different working orientations include a first orientation and a second orientation, diametrically opposite the first orientation.
3. The kit of parts of claim 2, wherein the different working orientations include third and fourth diametrically opposite orientations, each of the third and fourth orientations being at 90° to the first and second orientation.
4. The kit of parts of claim 2 or claim 3, wherein the different working orientations comprise any orientation about the longitudinal axis of the inlet pipe.
The kit of parts of any preceding claim, wherein adjacent segments are delineated from one another by notches in the inlet pipe.
6. The kit of parts of claim 5, wherein each notch is provided by a necked portion of the inlet pipe which connects adjacent segments to one another for facilitating their removal.
The kit of parts of any preceding claim, wherein each segment comprises one or more annular features with which the pipe fitting of the valve engages to mount the valve to the inlet pipe.
8. The kit of parts of claim 7, wherein the or each annular feature comprises a part-annular tab.
9. The kit of parts of claim 8, wherein the or each part-annular tab comprises a tapered or angled surface configured to urge the inlet pipe into the pipe fitting when it is rotated io from the unlocked orientation toward the locked orientation. The one or more tabs, teeth or barbs of the inlet pipe may comprise a circumferential portion or surface for engaging a corresponding surface of the bayonet coupling or sleeve, e.g. thereby to prevent or inhibit removal of the inlet pipe from the bayonet coupling or sleeve when it is in the locked orientation. 10. 12. 13. 14. 15.
The kit of parts of claim 8 or claim 9, wherein the or each annular feature comprises a tooth or barb.
The kit of parts of any preceding claim, wherein the pipe fitting comprises a compression, push fit, snap fit, bayonet or C-clip coupling.
The kit of parts of any preceding claim comprising a sealing tube for providing a sealed connection between the first end of the inlet pipe and the inlet of the valve, the sealing tube comprising a first portion for sealingly engaging the inlet pipe and a second portion for sealingly engaging the inlet of the valve.
The kit of parts of claim 12, wherein each portion of the sealing tube extends from a flange and comprises an 0-ring received within a groove.
The kit of parts of any preceding claim comprising a tool for removing one or more of the segments of the inlet pipe.
A method of adapting an inlet valve for a toilet cistern, the method comprising: removing one or more segments of a series of segments of an inlet pipe to reduce its length, such that the last segment in the series describes a first end of the inlet pipe; connecting a pipe fitting of an inlet valve to the inlet pipe by selectively engaging the segment describing the first end of the inlet pipe in any one of a plurality of different working orientations about a longitudinal axis of the inlet pipe; sealingly mounting the inlet pipe within a hole through the base of a cistern at or adjacent a second end of the inlet pipe; and connecting to the inlet valve an actuator for closing the valve when water in the io cistern reaches a predetermined level.
16. The method of claim 15 comprising urging the inlet pipe into the pipe fitting of the valve using an axial force along the longitudinal axis of the inlet pipe to sealingly connect the pipe fitting to the first end of the inlet pipe.
17. The method of claim 16 comprising rotating an outer sleeve of the pipe fitting to compress an inner sleeve of the pipe fitting against the first end of the inlet pipe.
18. The method of claim 16, wherein urging the inlet pipe into the pipe fitting causes the pipe fitting to engage an annular feature of the segment describing the first end of the inlet pipe, thereby to inhibit removal of the inlet valve from the inlet pipe.
19. The method of claim 18, wherein urging the inlet pipe into the pipe fitting causes a ring of the pipe fitting to engage an annular groove describing a necked portion which connects the segment describing the first end of the inlet pipe to an adjacent segment.
20. The method of claim 18, wherein urging the inlet pipe into the pipe fitting causes one or more engaging teeth of the pipe fitting to pass over and engage one or more engaging teeth of the segment describing the first end of the inlet pipe.
21. The method of claim 20 comprising inserting a sealing tube between the inlet pipe and the pipe fitting to provide a sealed connection therebetween.
22. The method of claim 18 comprising rotating the pipe fitting to engage a part-annular tab of the segment describing the first end of the inlet pipe.
23. The method of claim 16 comprising urging a C-clip into engagement with an annular groove describing a necked portion which connects the segments describing the first end of the inlet pipe to an adjacent segment.
24. The method of any one of claims 15 to 23 comprising removing the one or more segments by breaking or severing the segments form the inlet pipe.
25. The method of claim 24 comprising using a tool to break or sever the segments from io the inlet pipe.