GB2471435A - Selectable Tap Outlet Flow Adjustor - Google Patents

Selectable Tap Outlet Flow Adjustor Download PDF

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Publication number
GB2471435A
GB2471435A GB201018256A GB201018256A GB2471435A GB 2471435 A GB2471435 A GB 2471435A GB 201018256 A GB201018256 A GB 201018256A GB 201018256 A GB201018256 A GB 201018256A GB 2471435 A GB2471435 A GB 2471435A
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Patent type
Prior art keywords
disk
voids
spray
water
flow
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB201018256A
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GB2471435B (en )
GB201018256D0 (en )
Inventor
Mohanarajah Sithamparanathan
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Mohanarajah Sithamparanathan
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/12Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means capable of producing different kinds of discharge, e.g. either jet or spray
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/16Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets
    • B05B1/1627Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock
    • B05B1/1636Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening having selectively- effective outlets with a selecting mechanism comprising a gate valve, a sliding valve or a cock by relative rotative movement of the valve elements
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03CDOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02Plumbing installations for fresh water
    • E03C1/04Water-basin installations specially adapted to wash-basins or baths
    • EFIXED CONSTRUCTIONS
    • E03WATER SUPPLY; SEWERAGE
    • E03CDOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02Plumbing installations for fresh water
    • E03C1/04Water-basin installations specially adapted to wash-basins or baths
    • E03C1/0404Constructional or functional features of the spout

Abstract

The present invention relates to a selectable tap outlet flow adjustor that is designed to change the water flow from a water tap/ faucet to run or spray. The device comprises a control disk 5 for selecting the flow state and has angularly spaced open voids 24 spaced about an axis through which voids water passes when in use. The adjuster also comprises a spray forming disk 4 which has angularly spaced open running voids 35 spaced about an axis through which voids water may pass when in use, and further comprises perforations 34b in those parts of its body between the angularly spaced open voids through which perforations water may pass at a reduced spray rate when in use. The spray forming disk and control disk are axially rotatable with respect to each other whereby when one disk is rotated relative to the other so that the perforations in the spray forming disk are aligned with the open voids in the control disk, water may pass through at a reduced flow rate. Later embodiments include the features of directed/slanted perforations and a spring bias 10 to bias the device in a selected position.

Description

Selectable Tap Outlet Flow Adiustor

Field of the Invention

The present invention concerns selectable tap flow adjusting appliances of the type that are fitted to the outlet! delivery end of a tap (faucet) and which enable the user to select between water delivery flow patterns.

Background to the Invention

Selectable tap outlet flow adjustors of the type in question have been available for many decades but in recent years their value as a means of economizing on water usage has become increasingly important. Many of the currently available tap outlet flow adjustors are designed primarily to provide selection between aerated and non-aerated water flows. In aerated flow state air is bubbled in with the water, reducing the amount of water used but allowing a soft bubbly flow. A common aspect of the design of these devices is that they tend to be arranged with the different flow states achieved by switching between an inner central! axial flow path and an eccentric or outer concentric flow path and are generally relatively bulky, spreading laterally and extending well beyond the delivery end of the tap. Examples of this are shown in US patent US 4221338 and applications US 20060163387 and US 20070235091. Another type of such device is the non-aerated flow-reduced design that in its spray state forces the water through a set of smaller holes in the tap head, producing a fine, firmer spray. Again it is common in these tap heads to arrange the finer holes concentric to a broad inner central! axial flow path.

In all of these existing tap outlet flow adjustor designs the structure is generally not only obtrusive but their assembly also tends to be liable to lime-scale obstruction over time in areas with hard water. Many tend to seize up, becoming increasingly difficult to move between operative states.

It is amongst the general objects of the present invention to provide a new selectable tap outlet flow adjustor that addresses these problems of the existing tap outlet flow adjustor designs, providing a device that is affordable, economic in its use of water, discrete in form and attractive, able to maximize space between the tap outlet/delivery end and the basin or object to be cleaned and is relatively easy to operate and maintain in good functional condition, even in areas with hard water.

It is a further object to provide a selectable tap outlet flow adjustor that is suited for use in kitchen sinks, washing basins or the like to be able to,for example, facilitate dish washing! cleaning tasks and be able to select between focused and spread area coverage as required to improve efficiency of washing! cleaning and thereby save on cleaning time and overall water usage.

Summary of the Invention

According to a first aspect of the present invention there is provided a selectable tap outlet flow adjustor for controlling water flow, the flow adjustor comprising: a control disk for selecting the flow state comprising angularly spaced open voids spaced about an axis through which voids water passes when in use; and a spray forming disk, the spray forming disk also comprising angularly spaced open running voids spaced about an axis through which voids water may pass when in use but further comprising perforations in those parts of its body between the angularly spaced open voids through which perforations water may pass at a reduced spray rate when in use, the spray forming disk and control disk being axially rotatable with respect to each other whereby when one disk is rotated relative to the other so that the open running voids of the spray forming disk are aligned with the open voids in the control disk, water may pass through at a first flow rate and when one disk is rotated relative to the other so that the perforations in the spray forming disk are aligned with the open voids in the control disk, water may pass through at a second flow rate, less than the first flow rate and as a spray.

For the purposes of the present invention the term disk is intended to embrace substantially flat, substantially circular plate-like structures but the disk need not be entirely flat and may be convex or concave and in embodiments the discs may have an upstanding circumferential annular wall and! or central lug and have much of the area of their major surface removed as the voids.

Particularly preferably the open voids of the control disk and the open running voids of the spray forming disk are sectors of the respective disks.

The selectable tap head suitably comprises a body mountable to the delivery end of a tap and preferably the body is a short cylinder in form that preferably is adapted to be inserted into the delivery end of a tap. It preferably has an external screw thread to be fastened to a tap end that has an internal screw thread though other mounting arrangements may be used for different types of tap end. For some tap ends a clamping type of arrangement may be required.

Preferably the body and the spray forming disk are unitary! integrally formed or integrally assembled. This arrangement is preferable to the body and the control disk being unitary! integrally formed or integrally assembled since it allows for easier assembly and maintenance.

Alternatively the body may comprise a separate holding disk that holds the control disk so that the control disk does not rotate with respect to the holding disk.

The selectable tap head is suitably configured to match with existing! standard taps and to meet local government regulations to control the water flow pattern. With this compact and discrete device fitted to the delivery end of a tap users can consume water with greater control and convenience and also economise on their use of water.

The device allows a user to select a first flow state where the water flows in a stream or jet suitable for, for example, filling up a vessel such as a kettle or for local ised! focussed cleaning of items. n this state the water flows rapidly through a set of large angularly spaced voidsi apertures of the device and which can save time for filling up work.

n order to perform other tasks where the flow rate of the first flow state may be unnecessary and a lower flow rate with a broader spray pattern of delivery may be more appropriate (for example, for more general spray washing of dishes and pans) a second flow state may be selected on the tap head by turning the control disk or the spray-forming disk about its axis to bring the perforated plate sectors of the spray-forming disk into register with the void sectors of the control disk.

The perforations are preferably directed! slanted laterally! radially outwardly so that the spray has a broad spread and not simply oriented parallel to the axis of the tap outlet. The passageway that each perforation forms may be so slanted and! or particularly preferably the perforations each terminate at their external end in a respective nozzle that is directed! slanted laterally! radially outwardly.

n this second flow state the water can be sprayed over a relatively wide area even when the supplied water pressure is low. This spray over a wider area rather than just running on one spot!area enables economisation on use of water (and of money where water supply is metered). The tap head is not designed to aerate the water and it does not allow air or any counter-flow against the water flow direction.

The device of the present invention may be made to a range of dimensions to suit existing! standard commercially available taps and may be sold with taps or separately to be fitted to the outlet of the tap/faucet by the user.

Brief Description of the Drawings

Preferred embodiments of the present invention will now be further described, by way of example only, with reference to the accompanying drawings, in which: Figure 1 is an exploded general assembly diagram of a first preferred embodiment of the tap outlet flow adjustor having a control disk for selecting the flow state and a spray forming disk, the spray forming disk being cylindrical and adapted to fit to the outlet! delivery end of a tap by an external screw thread on the spray-forming disk; Figure 2 comprises a set of views of the spray-forming disk showing its front and rear faces and details of the faces; Figure 3 comprises a set of views of the control disk showing its front and rear faces and details of the faces; Figure 4 comprises a set of three views each of each of the biasing spring, the washer, the control disk and the spray-forming disk and in the lowermost views showing the control disk and the spray-forming disk assembled together for use; Figure 5 comprises a set of three views each of each of the control disk and the spray-forming disk assembled together, showing them in the first flow state configuration (stream mode) on the left and in the second flow state configuration (spray mode) on the right; Figure 6 is a set of two views of the device fitted to the delivery! outlet end of a conventional kitchen sink mixer tap -in the left hand images the device is in its first flow state configuration (stream mode) and in the right hand images it is in the second flow state configuration (spray mode) Figure 7 is a set of two views of the device corresponding to Figure 6 with the device in its second flow state configuration (spray mode) and showing the effect of increased water supply to the device from the tap; Figure 8 comprises a set of three views including a front elevation view of the control disk and the spray-forming disk assembled together, and sections therethrough along lines Al-Al and A3-A3 to show the slanted nozzles and the location of the spring wire; Figure 9 comprises a set of three views including a front elevation view of the control disk and the spray-forming disk assembled together, a section along the line A2-A2 and a part cut-away exploded assembly view of the same; and Figure 10 is an exploded general assembly diagram of a second preferred embodiment of the tap outlet flow adjustor having a control disk for selecting the flow state a spray forming disk, and a separate holding body the hoJding body being cylindrical and adapted to fit to the outlet! delivery end of a tap by an external screw thread thereon.

Description of the Preferred Embodiment

Referring to Figure 1, the first preferred embodiment of the tap outlet flow adjustor comprises two disks' -a control disk 5 for selecting between first (stream-flow) and second (spray) flow states and a spray forming disk 4.

The control disk 5 is a substantially flat and substantially circular component that may be moulded of nylon or other tough plastics material or may be of a rust-proof metal or alloy. It has a short upstanding circumferential wall that has a radially outwardly projecting lip/rim. The control disk 5 has an array of four equi-angularly spaced open voids 24 spaced about its central axis (see central axle stub-accommodating aperture 25). It is through the voids 24 in control disk 5 that water passes in use. The voids 24 have the form of apertures through the floor of the disk 5 that are sectors of the circular plan shape of the disk 5. Each of the four voids 24 spans 450 of the circular floor area. The non-apertured sectors 23 of the disk floor between adjacent voids 24 are equally-sized 450 sectors and each acts as a barrier to water flow at that sector and can thus act as a means to selectively divert water flow.

The control disk 5 further has an operating lever 38 that projects downwardly (forwardly) and radially outwardly from the front face thereof (ie from the face that is outermost from the tap end) to allow the disk 5, once assembled to the spray-forming disk 4, to be turned about the axis 25 around the axle stub 39 of the spray forming disk 4.

The spray-forming disk 4 is in several respects similar to the control disk 5.

The spray-forming disk 4 has an array of four 450 equi-angularly spaced open running voids 35. These are thus spaced about the central axis! axle stub 39 of the spray-forming disk 4 to match the shape, size and arrangement of the voids 24 of the control disk 5. Between the open running voids 35 of the spray-forming disk 4 are the spray-forming sectors 34 of the spray-forming disk 4, each of which has a plurality of perforations 34b. The spray-forming disk 4 also has an upstanding circumferential wall 63 that is short but not as short as the corresponding wall of the control disk 5. The wall 63 has an external screw thread 65 formed on it whereby the spray-forming disk 4 is adapted to be able to readily de-mountably mount to the outlet! delivery end of a tap that has an internal screw thread at its outlet end. An elastomeric 0-ring sealing member 3 is provided that fits in an annular groove 66 around the circumference of the spray-forming disk 4. This prevents any leakage from between the tap outlet end and the device when the device is fitted to a tap in use.

The control disk 5 nests into the rear of the spray-forming disk 4 within the upstanding circumferential wall 63 thereof. The control disk 5 is able to partially rotate about the axle stub 39 of the spray-forming disk 4 but is restricted in its turning by abutment of the lever 38 against end stop! limiting protrusions 70 on the outer! front face 71 of the spray-forming disk 4. These end stop! limiting protrusions 70 allow the control disk 5 to turn about axle stub 39 only between first radial orientation 69 and second radial orientation 68 that are 45° apart, corresponding to the width of the voids 24, so that at the first orientation the voids 24 of the control disk 5 align with the open running voids 35 of the spray-forming disk 4 to provide a stream or jet-like flow from the device, while at the second orientation the voids 24 of the control disk 5 align with the perforated floor sectors 34 of the spray-forming disk 4 and the open running voids 35 of the spray-forming disk 4 are closed off by the non-apertured sectors 23 of the control disk 5, thereby providing a spray flow from the device.

To hep to keep the device in one state (ie either shower or flow state) and, for example, make the device less liable to being left inadvertently in an intermediate state whereby a user might accidentally spray himself or incur spillage, one or more wire springs 10 is provided in the control disk 5 to resiliently bias the device to the first or second state. The wire spring 10 is bent into an arched form that lies in a groove 27 in the surface of the control disk 5 as shown in Figure 1 and the apex of the arched form of the wire spring 10 sits in a short angular recess! groove 36 in the circumference of the upper end 33 of the spray-forming disk's axle stub 39. The spray-forming disk's axle stub 39 extends up through the central aperture 25 in the control disk 5 and thus couples the contro disk 5 and spray disk 4 together while allowing the relative rotation between the two.

The combination of the spring 10 and groove 36a / 36b forms a securing arrangement that demountably secures the assembled control disk 5 and spray disk 4 together.

A radius bend in the curve of the wire spring 10 increases its efficiency and flexibility. In the operation of the wire spring 10 the portion in the recess 36 will slip on the raised hump portion 36a of the floor of the recess 36 (see upper diagram of Figure 2) and in slipping to the respective side of the hump 36b to relieve the tension in the wire spring (10) t will be biasing the control disk 5 substantially fuHy to one of the first and second states rather than letting it sit in any intermediate state. A partially angularly caved shape helps to aUow the wire spring (10) to apply force on and rest on one of the flat faces 36b of the recess 36.

The end stop! limiting protrusions 70 as illustrated are suitably demountable via a pin 76 at their upper face which fits into a slot 77 (see Figure 2) in the underside! external face 71 of the spray-forming disk 4.

The shape of the protrusions 70 is suitably a rounded rather than cuboidal form. Demountability of the end stops 70 can serve as a means to facilitate disassembly of this version of the device. The demountable end stop! limiting protrusions 70 when removed allow the lever 38 to be turned beyond the limits to disengage it from the spray-forming disk 4. The turning of the control disk 5 beyond the 45° point helps release the wire spring 10 which moves to surface 36c and allows the ridge 32 to enter the broader recess 28c of the control disk 5, whereupon the control disk 5 can be pushed from below through the voids 35 to demount from the axle stub 39.

As noted above, for disassembly, when the spray-forming disk 4 is turned more than 45 degrees the wire 10 will be brought on to the vertical surface 36c of the axle stub and with no obstruction in this area 36c the control 5 and spray-forming 4 disks can be then separated for maintenance. The top portion 33 of the axle stub 39 functions as a cap to retain the spring wire 10 from escaping while assembled.

The reverse of the disassembly process is followed for re-assembly. When re-installing the end stops 70 their cylindrical shape simplifies the process, avoiding mismatched orientations and inconsistent end stop-to-end stop spans.

As noted earlier, the spray-forming disk has in its spray-forming sectors a plurality of perforations 34b. These perforations 34b each extend into a respective nozzle 42 on the outer face of the spray-forming disk 4 and the passage of each perforation 34b and through the nozzle 42 is of tapered form, each having a wider bore at their end adjacent the tap and narrowing towards their other end. The diameters of the perforation and nozzle 42 bores at each end and their positions and slant angles are such as to provide a desired relatively broad spray coverage area at a standard ength from the nozzles. The arrangement of the nozzles separates the flow into a spray pattern. Raising the supply pressure to the device wiH widen the spray area and reducing water pressure wifl conversely reduce spread. To provide a broad spray coverage area each nozzle 42, and particularly each of the outermost nozzles 42 is inclined radially outwardly in the direction of flow. This inclination is suitably selected to reach the full width of a sink at maximum water flow rate. The nozzles help to maintain good delivered pressure in spray mode since the delivered water pressure from the spray will increase as its passes from the wider inner end of each nozzle 42 to the narrower outer end.

The system works effectively, adjusting with ease between spray and stream flow and operating reliably in each state, even if there is reduced water pressure i supply to the tap (see Figure 7), whereas the prior art aerated devices need sustained high pressure water supply especially those that mix the water with air, The device may be partially self cleaning since the mutually facing major disk surfaces of the control and sprayforming disks 4, 5 may dislodge any lime-scale building up between them as they rotate over each other.

Furthermore, the ease of demounting of the device from the tap and ease of disassembly of the disks 4, 5 of the device from each other enables the device to be thoroughly cleaned at regular intervals to maintain a long effective working life of the device.

As an improved extra (or alternative) relative rotation feature that may replace the axle stub, a ridge 32, preferably convex rounded, may be built on to a ledge of the circumferential wall 40 of the spray-forming disk 4 and serve to co-operate with! run up and down a channel 28c (see Figure 3).

This engages nto a partiaHy dosed round-shaped recess 28a after the point 28b.

In variants of the device, whereas the presently illustrated device has the four 450 void sectors 24 each separated by a 450 non-void sector 23 in the control disk 5 and with a corresponding pattern in the spray-forming disk 4, there could be a greater or lesser number of voids with correspondingly lesser or greater sector angle sizes. Furthermore, for ensuring a complete closure of the voids of the spray-forming disks, the non-void sectors 23 of the control disk 5 could be slightly greater in angular area than the void sectors 35 or perforated sectors 34 of the spray-forming disk 4 so that there is complete overlap of the edges of the latter and thus no leakage.

In a further variant the non-void sectors 23 in the control disk 5 may be formed slightly smaller than the perforated sectors 34 so that when the first state (stream flow) is adopted the non-void sectors 23 completely move fully onto the perforated sectors 34 fully covering the perforations and being fully away from the void sectors 35 of the spray-forming disk.

When the second state (spray flow) is selected the non-void sectors 23 will overlie the void sectors 35 of the spray-forming disk 4, over-lapping the un-perforated edges of the perforated sectors 34 to not let any water pass through any part of the void sectors 35.

Suitably the spray-forming disk 4 upstanding circumferential wall 63 has its inner circumferential shelf 37,that the control disk 5 sits onto, lowered so that the outer lip/rim 21 of the control disk 5 is as close as possible to the floor of the spray-forming disk 4. This further facilitates operation of the raised, rounded (or not) rotation limiting ridge 32, if present, to co-operate with the corresponding recess 28a-c on the bottom surface of the control disk 5.

Turning to Figure 10, in the second embodiment of the invention, the device comprises a control disk for selecting the flow state, a spray forming disk, and a separate holding body. The holding body 4 is cylindrical and adapted to fit to the outlet! delivery end of a tap by an external screw thread 65 thereon. The construction and operation of the components is similar to that in the first embodiment, but the spray-forming disk is designed to be partly rotatable and has the operating lever extending from it, while the control disk is held immobile on the tap end by the holding body which prevents rotation of the control disk therewithin.

In both embodiments the securing effect of the spring 10 in holding the assembled disks 4, 5 together is augmented by the effect of the running water in use that also pushes the control disk 5 towards the spray-forming disk 4. The intimate arrangement of the mutually rotating disks 4, 5 helps to disrupt any build-up of lime-scale in use and the assembly of the device facilitates its disassembly for maintenance when cleaning is needed.

Claims (14)

  1. Claims 1. A selectable tap outlet flow adjustor for controlling water flow, the flow adjustor being mountable to the outlet! delivery end of a tap and comprising: a control disk for selecting the flow state comprising angularly spaced open voids spaced about an axis through which voids water passes when in use; and a spray forming disk, the spray forming disk also comprising angularly spaced open running voids spaced about an axis through which voids water may pass when in use but further comprising perforations in those parts of its body between the angularly spaced open voids through which perforations water may pass at a reduced spray rate when in use, the spray forming disk and control disk being axially rotatable with respect to each other whereby when one disk is rotated relative to the other so that the open running voids of the spray forming disk are aligned with the open voids in the control disk, water may pass through at a first flow rate and when one disk is rotated relative to the other so that the perforations in the spray forming disk are aligned with the open voids in the control disk, water may pass through at a second flow rate, less than the first flow rate and as a spray.
  2. 2. A selectable tap outlet flow adjustor as claimed in Claim 1, wherein the open voids of the control disk and the open running voids of the spray forming disk are sectors of those respective disks.
  3. 3. A selectable tap outlet flow adjustor as claimed in Claim I or Claim 2 wherein the adjustor has a body mountable to the delivery end of a tap and which is a short cylinder in form.
  4. 4. A selectable tap outlet flow adjustor as claimed in any preceding claim wherein the adjustor is adapted to be inserted into the delivery end of a tap with an internal screw thread and has an external screw thread to be fastened to the tap end.
  5. 5. A selectable tap outlet flow adjustor as claimed in any preceding claim wherein the body and the spray forming disk are unitary! integrally formed or integrally assembled.
  6. 6. A selectable tap outlet flow adjustor as claimed in any of claims 1 to 4, wherein the body and the spray forming disk are separate and the holding body holds the control disk in use so that the control disk does not rotate with respect to the holding body.
  7. 7. The apparatus, according to any of the preceding claims, wherein the sprinkle!running disk or control disk comprises a turning lever, operable to rotate the disc and extending outside of the device.
  8. 8. A selectable tap outlet flow adjustor for controlling water flow, the flow adjustor being mountable to the outlet! delivery end of a tap and comprising: a control disk for selecting the flow state comprising open voids through which voids water passes when in use; and a spray forming disk, the spray forming disk also comprising open running voids through which voids water may pass when in use but further comprising perforations in those parts of its body between the open voids through which perforations water may pass at a reduced spray rate when in use, the spray forming disk and control disk being axially rotatable with respect to each other whereby when one disk is rotated relative to the other so that the open running voids of the spray forming disk are aligned with the open voids in the control disk, water may pass through at a first flow rate and when one disk is rotated relative to the other so that the perforations in the spray forming disk are aligned with the open voids in the control disk, water may pass through at a second flow rate, less than the first flow rate and as a spray wherein at least some of the perforations have their flow output directed! slanted laterally! radiaUy outwardly so that the spray has a broadened spread.
  9. 9. A selectable tap outlet flow adjustor as claimed in claim 8, wherein the passageway that a perforation forms is itself directed! slanted laterally! radially outwardly.
  10. 10. A selectable tap outlet flow adjustor as claimed in claim 8 or 9, wherein a perforation terminates at its external end in a nozzle having a bore narrowing in the direction of flow.
  11. 11. A selectable tap outlet flow adjustor as claimed in claim 9, wherein the nozzle is directed! slanted laterally! radially outwardly.
  12. 12. A selectable tap outlet flow adjustor for controlling water flow, the flow adjustor being mountable to the outlet! delivery end of a tap and comprising: a control disk for selecting the flow state comprising open voids through which voids water passes when in use; and a spray forming disk, the spray forming disk also comprising open running voids through which voids water may pass when in use but further comprising perforations in those parts of its body between the open voids through which perforations water may pass at a reduced spray rate when in use, the spray forming disk and control disk being axially rotatable with respect to each other whereby when one disk is rotated relative to the other so that the open running voids of the spray forming disk are aligned with the open voids in the control disk, water may pass through at a first flow rate and when one disk is rotated relative to the other so that the perforations in the spray forming disk are aligned with the open voids in the control disk, water may pass through at a second flow rate, less than the first flow rate and as a spray wherein a resilient biasing means is provided in the device to bias the device to the first or second state.
  13. 13. A selectable tap outlet flow adjustor as claimed in any preceding claim, wherein by virtue of the stacked disk construction and intimacy of disks the adjustor is so compact in form as to fit substantially wholly within the end of the tap in use.
  14. 14. A selectable tap outlet flow adjustor as claimed in any preceding claim, wherein by virtue of the intimate disk construction where the control disk rotates over the spray-forming disk the adjustor is partially self-cleaning in use, ie reduces accretion of lime-scale.Amendments to the claims have been filed as follows.Claims 1. A selectable tap outlet flow adjustor for controlling water flow, the flow adjustor being mountable to the outlet! delivery end of a tap and comprising: a control disk for selecting the flow state comprising angularly spaced open voids spaced about an axis through which voids water passes when in use; and a spray forming disk, the spray forming disk also comprising angularly spaced open running voids spaced about an axis through which voids water may pass when in use but further comprising perforations in those parts of its body between the angularly spaced open voids through which perforations water may pass at a reduced spray rate when in use, the spray forming disk and control disk being axially rotatable with respect to Q 15 each other whereby when one disk is rotated relative to the other so that the open running voids of the spray forming disk are aligned with the open voids in the control disk, water may pass through at a first flow rate and when one disk is rotated relative to the other so that the perforations in the spray forming disk are aligned with the open voids in the control disk, water may pass through at a second flow rate, less than the first flow rate and as a spray.2. A selectable tap outlet flow adjustor as claimed in Claim 1, wherein the open voids of the control disk and the open running voids of the spray forming disk are sectors of those respective disks.3. A selectable tap outlet flow adjustor as claimed in Claim I or Claim 2 wherein the adjustor has a body mountable to the delivery end of a tap and which is a short cylinder in form.4. A selectable tap outlet flow adjustor as claimed in any preceding claim wherein the adjustor is adapted to be inserted into the delivery end of a tap with an internal screw thread and has an external screw thread to be fastened to the tap end.5. A selectable tap outlet flow adjustor as claimed in any preceding claim wherein the body and the spray forming disk are unitary! integrally formed or integrally assembled.6. A selectable tap outlet flow adjustor as claimed in any of claims 1 to 4, wherein the body and the spray forming disk are separate and the holding body holds the control disk in use so that the control disk does not rotate with respect to the holding body.7. The apparatus, according to any of the preceding claims, wherein the sprinkle!running disk or control disk comprises a turning lever, Q 15 operable to rotate the disc and extending outside of the device.8. A selectable tap outlet flow adjustor for controlling water flow, the flow adjustor being mountable to the outlet! delivery end of a tap and If) comprising: (\J a control disk for selecting the flow state comprising open voids through which voids water passes when in use; and a spray forming disk, the spray forming disk also comprising open running voids through which voids water may pass when in use but further comprising perforations in those parts of its body between the open voids through which perforations water may pass at a reduced spray rate when in use, the spray forming disk and control disk being axially rotatable with respect to each other whereby when one disk is rotated relative to the other so that the open running voids of the spray forming disk are aligned with the open voids in the control disk, water may pass through at a first flow rate and when one disk is rotated relative to the other so that the perforations in the spray forming disk are aligned with the open voids in the control disk, water may pass through at a second flow rate, less than the first flow rate and as a spray wherein at least some of the perforations have their flow output directed! slanted laterally! radiaUy outwardly so that the spray has a broadened spread.9. A selectable tap outlet flow adjustor as claimed in claim 8, wherein the passageway that a perforation forms is itself directed! slanted laterally! radially outwardly.10. A selectable tap outlet flow adjustor as claimed in claim 8 or 9, wherein a perforation terminates at its external end in a nozzle having a bore narrowing in the direction of flow.11. A selectable tap outlet flow adjustor as claimed in claim 9, wherein the nozzle is directed! slanted laterally! radially outwardly.Q 12. *A selectable tap outlet flow adjustor for controlling water flow, the flow adjustor being mountable to the outlet! delivery end of a tap and comprising: a control disk for selecting the flow state comprising open voids through which voids water passes when in use; and a spray forming disk, the spray forming disk also comprising open running voids through which voids water may pass when in use but further comprising perforations in those parts of its body between the open voids through which perforations water may pass at a reduced spray rate when in use, the spray forming disk and control disk being axially rotatable with respect to each other whereby when one disk is rotated relative to the other so that the open running voids of the spray forming disk are aligned with the open voids in the control disk, water may pass through at a first flow rate and when one disk is rotated relative to the other so that the perforations in the spray forming disk are aligned with the open voids in the control disk, water may pass through at a second flow rate, less than the first flow rate and as a spray wherein a resilient biasing means is provided in the device to bias the device to the first or second state.13. A selectable tap outlet flow adjustor as claimed in any preceding claim, wherein by virtue of the stacked disk construction and intimacy of disks the adjustor is so compact in form as to fit substantially wholly within the end of the tap in use.14. A selectable tap outlet flow adjustor as claimed in any preceding claim, wherein by virtue of the intimate disk construction where the control disk rotates over the spray-forming disk the adjustor is partially self-cleaning in use, ie reduces accretion of lime-scale. L() (\J
GB201018256A 2010-02-08 2010-10-29 Selectable tap outlet flow adjustor Active GB2471435B (en)

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PCT/GB2011/000066 WO2011101610A1 (en) 2010-02-08 2011-01-20 Selectable tap outlet flow adjustor
US13577856 US20130075500A1 (en) 2010-02-08 2011-01-20 Selectable tap outlet flow adjuster
GB201112277A GB201112277D0 (en) 2010-10-29 2011-07-18 Selectable tap outlet flow adjustor

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GB201018164D0 (en) 2010-12-08 application
GB2471435B (en) 2011-05-25 grant
GB201018256D0 (en) 2010-12-15 application
GB201007675D0 (en) 2010-06-23 application
GB2464869A (en) 2010-05-05 application
GB201001933D0 (en) 2010-03-24 application
GB2474732A (en) 2011-04-27 application
US20130075500A1 (en) 2013-03-28 application
GB2464869B (en) 2010-10-13 grant
WO2011101610A1 (en) 2011-08-25 application
GB2474732B (en) 2012-03-14 grant

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