Grout nozzle for a grout extruder

Abstract

The present disclosure is directed to a grout nozzle for a grout extruder of an autonomous grouting robotic apparatus The grouting nozzle has a coupling member for coupling to a grout extruder and an opening for receiving grout from the grout extruder. The grouting member comprises a grout surface, containment means for containing the flow of the grout on the grout surface, at least one outlet for egress of the extruded grout, at least one scraper for pushing grout into the gaps in the application zone. The at least one scraper is axially aligned to the at least one outlet along a grouting direction wherein the at least one outlet precedes the at least one scraper in the grouting direction.

Description

[0001] Grout nozzle for a grout extruder

[0002] Technical Field

[0003] The present disclosure relates to the field of grouting of tiles and grouting products thereof. In particular, to a nozzle for a grout extruder which can be used for grouting, and more particularly, to a nozzle for a grout extruder of an autonomous grouting robot.

[0004] Background

[0005] After tiles are installed on a surface, grout is typically applied to fill the gaps between adjacent tiles or between edge tiles and a wall. Grout is fluid mixture which sets hard and is typically a cement-based fluid mixture comprised of water, cement and depending upon the application, additives such as sand and polymers. Epoxy and polymer grouts are also used in certain applications. Grout is used to add mechanical strength to tiles (i.e. to support the edges and to keep them spaced apart), to protect the surface beneath the tiles and to improve the visual appearance of the tiles.

[0006] Applying grout is laborious process in which a tool such as a trowel or grout float is used to push grout into gaps between tiles. The application is performed by pushing the grout along a grouting direction over a gap between tiles. Any excess grout is then progressively cleaned off the tiles using a sponge or cloth while taking care not to disrupt / remove the grout in the gap between the tiles. Given the manual and laborious nature of the task, various attempts have been made to develop improved tools and apparatus (including automated robots).

[0007] However, this is a challenging task as grouting must be performed on a wide range of tiles of different sizes, shapes and colours laid in a wide range of geometrical configurations. In particular, the perimeter size and shape of the grout application zone varies significantly, and care must be taken with grouting around edges to avoid grout on walls or surrounding areas. Further the grouting must be performed in a wide range of lighting and environmental conditions (e.g. indoor and outdoor locations).

[0008] Accordingly, many of the tools or apparatus developed to date are only useful for specific tasks such as cleaning with a sponge or operating in large open areas away from boundaries. As such they remain inefficient compared to an experienced human grouter / tiler with a trowel and sponge that is more versatile and able to grout a range of different tiles (including into corners and edges) in a range of locations and environments

[0009] Grout nozzles for grout extruders are generally known. These grout nozzles are suitable for applying grout into gaps between floor tiles and into edge gaps between a floor tile and a wall or a wall tile. The grout nozzles generally have slots that need to be aligned to the gaps for proper application of grout. However, there remains a need to improve grouting reliability in automated grouting systems or apparatuses.

[0010] The present disclosure is directed, at least in part, to improving or overcoming one or more aspects of the prior art system.

[0011] Brief Summary of the Invention

[0012] The present disclosure describes a grout nozzle for a grout extruder of an autonomous grouting robotic apparatus as defined in claim 1. The grout nozzle improves grouting reliability by allowing more error in alignment between the spreading of grout and the gap between the tiles or the grout line. The grout nozzle simulates the use of a trowel or a grout float that allows for simultaneously spreading discharged grout over the grout line and pushing the discharged grout into the grout line. The hydrostatic pressure of the grout is also regulated during the application process. The grout nozzle is removable and may be interchanged based on the needs of the specific situation, such as, but not limited to, the width of the grout line and the depth of the grout line.

[0013] As defined in the appended dependent claims, the grout nozzle provides for multiple scrapers that operate sequentially to push grout further into the grout line. The plurality of scrapers simulates a human hand going across a grout line multiple times. The grout nozzle also redirects residual grout with a flow-guide so that the residual grout may be spread over the grout line again.

[0014] Brief Description of the Drawings

[0015] The foregoing and other features and advantages of the present disclosure will be more fully understood from the following description of various embodiments, when read together with the accompanying drawings, in which:

[0016] Fig. 1A is an isometric view of a first embodiment of a grout nozzle according to the present disclosure,

[0017] Fig. IB is a top view of the nozzle of Fig. 1A; Fig. 1C is a side view of the nozzle of Fig 1 A;

[0018] Fig. ID is a rear view of the nozzle of Fig. 1A;

[0019] Fig. IE is a front view of the nozzle of Fig. 1 A;

[0020] Fig. IF is a bottom view of the nozzle of Fig. 1 A;

[0021] Fig. 2A is an isometric view of a second embodiment of a grout nozzle according to the present disclosure;

[0022] Fig. 2B is a top view of the nozzle of Fig. 2A;

[0023] Fig. 2C is a side view of the nozzle of Fig. 2A;

[0024] Fig. 2D is a rear view of the nozzle of Fig. 2A;

[0025] Fig. 2E is a front view of the nozzle of Fig. 2A;

[0026] Fig. 3A is an isometric view of a third embodiment of a grout nozzle according to the present disclosure;

[0027] Fig. 3B is a top view of the nozzle of Fig. 3A;

[0028] Fig. 3C is a side view of the nozzle of Fig. 3 A;

[0029] Fig. 3D is a rear view of the nozzle of Fig. 3A;

[0030] Fig. 3E is a front view of the nozzle of Fig. 3 A;

[0031] Fig. 4A is an isometric view of a fourth embodiment of a grout nozzle according to the present disclosure;

[0032] Fig. 4B is a top view of the nozzle of Fig. 4A;

[0033] Fig. 4C is a side view of the nozzle of Fig. 4A;

[0034] Fig. 4D is a rear view of the nozzle of Fig. 4A;

[0035] Fig. 4E is a front view of the nozzle of Fig. 4A;

[0036] Fig. 5 is an isometric view of an alternative to the first embodiment of a grout nozzle according to the present disclosure;

[0037] Fig. 6 is a top view of a grout nozzle according to the present disclosure with a plurality of scrapers and outlets;

[0038] Fig. 7 is a side view of an autonomous grouting robotic apparatus;

[0039] Fig. 8A is an isometric view of a fifth embodiment of a grout nozzle according to the present disclosure,

[0040] Fig. 8B is a bottom view of the nozzle of Fig. 8 A; Fig. 8C is a top view of the nozzle of Fig. 8A;

[0041] Fig. 8D is a cross-sectional view of the nozzle of Fig. 8A;

[0042] Fig. 9A is a top view of a sixth embodiment of a grout nozzle according to the present disclosure;

[0043] Fig. 9B is a front view of the nozzle of Fig. 9A;

[0044] Fig. 9C is a cross-sectional view through the nozzle of Fig. 9A;

[0045] Fig. 9D illustrates the deformation of the effectors during a grouting operation;

[0046] Fig. 10A is a top view of an alternative to the sixth embodiment of a grout nozzle according to the present disclosure;

[0047] Fig. 10B is a bottom view of the nozzle of Fig. 10A;

[0048] Fig. IOC is a rear view of the nozzle of Fig. 10A;

[0049] Fig. 10D is a cross-sectional view of the nozzle of Fig. IOC;

[0050] Fig. 10E is a side view of the nozzle of Fig. 9A;

[0051] Fig. 11 A is an isometric view of a seventh embodiment of a grout nozzle according to the present disclosure;

[0052] Fig. 1 IB is a bottom view of the nozzle of Fig. 11 A;

[0053] Fig. 11C is a cross-sectional view through the nozzle of Fig. 1 IB,

[0054] Fig. 12 is a cross-sectional view of an alternative to the seventh embodiment of a grout nozzle according to the present disclosure;

[0055] Fig. 13 A is a bottom view of a further alternative to the seventh embodiment of a grout nozzle according to the present disclosure;

[0056] Fig. 13B is a cross-sectional view of the nozzle of Fig. 13 A;

[0057] Fig. 14 is a cross-sectional view of an eighth embodiment of a grout nozzle according to the present disclosure;

[0058] Fig. 15A is a top view of a ninth embodiment of a grout nozzle according to the present disclosure,

[0059] Fig. 15B is a cross-sectional view through the nozzle of Fig. 15A;

[0060] Fig. 16A is a front view of a tenth embodiment of a grout nozzle according to the present disclosure,

[0061] Fig. 16B is a cross-sectional view through the nozzle of Fig. 16A; Fig. 16C is an isometric view of the nozzle of Fig. 16A;

[0062] Fig. 16D is a side view of the nozzle of Fig. 16A; and

[0063] Fig. 17 is a top view of an eleventh embodiment of a grout nozzle according to the present disclosure.

[0064] Detailed Description

[0065] This disclosure generally relates to a grout nozzle that spreads grout discharged from a grout extruder over a grout line. A grout line is a gap to be filed with grout. An example of a grout line is a gap between tiles. The grout line is located in an application zone that is identified for grouting. The application zone includes the grout line and the surfaces flanking the grout line. The grout nozzle may be engaged with an autonomous grouting robotic apparatus for application of grout in an application zone.

[0066] Figs. 1 to 6 and 8 to 17 (is taken to denote all the figures identified with sub-letters A- F) illustrate various embodiments of grout nozzles 10. The following description discloses the general features that are common to the four embodiments. Each of the embodiments of the grout nozzle 10 have a coupling member 12 and a grouting member 14. The grouting member 14 is arranged opposite to the coupling member 12. The coupling member 12 and the grouting member 14 are formed on the opposite sides of the grout nozzle 10.

[0067] In an embodiment, the coupling member 12 and the grouting member 14 are respectively provided on opposite surfaces of a body of the grout nozzle 10. The coupling member 12 and the grouting member 14 may be formed as a monolithic structure. In an alternative embodiment, the coupling member 12 and the grouting member 14 are respectively provided on separate bodies of the grout nozzle 10. Fig. 6 illustrates an autonomous grouting robotic apparatus 100 with a grout extruder 102.

[0068] With reference to Figs. 1 to 6, in an embodiment, the grout nozzles 10 may be longitudinally extended and have a longitudinal axis A. The grout nozzles 10 may have first end 11 and a second end 13. The first and the second ends 11, 13 are the transverse ends of the grout nozzle 10. The longitudinal axis A extends through the first and the second ends 11, 13

[0069] During operation, the grout nozzle 10 is required to be moved over a grout line along a grouting direction X. The grout nozzle 10 has a defined orientation with the first end 11 ahead of the second end 13 relative to the grouting direction X Specifically, the first end 11 leads the second end 13 when the grout nozzle 10 is aligned in the grouting direction X. The longitudinal axis A may be aligned to the grouting direction X during operation. The grouting direction X may be substantially parallel to the grout line.

[0070] In an embodiment, the grout nozzle 10 may have an elastomeric coating. Such a coating may be rubber or a rubber-like substance. The coating simulates a softer trowel used for grouting and to leave an acceptable finish while not damaging the tiles. An example may be a plastic grout nozzle 10 having a rubber coating.

[0071] With reference to Figs 1 to 6 and 8 to 17, the coupling member 12 is configured for coupling to a grout extruder. The coupling member 12 has a coupling means 16 for engaging the grout extruder and an opening 18 for receiving grout from the grout extruder. The coupling means 16 are configured to removably engage a discharge end of a grout extruder 102

[0072] In an embodiment, the coupling means 16 are configured for a sliding engagement with correspondingly configured structure in the grout extruder 102. The sliding means 16 comprise an axially extending mating structure that slidingly fits into a corresponding structure provided in the grout extruder 102. The coupling means 16 may be open at the second end 13 to permit relative sliding engagement between the coupling means 16 and corresponding structure on the grout extruder 102. The grout nozzle 10 is engaged to the grout extruder 102 by sliding relative to the grout extruder 102 against the grouting direction X. The coupling means 16 may be closed at the first end 11 to impede relative sliding engagement between the coupling means 16 and corresponding structure of the grout extruder 102. The grout nozzle 10 is disengaged from the grout extruder 102 by sliding relative to the grout extruder 102 along the grouting direction X.

[0073] In alternative embodiments, the coupling means 16 may be configured with a removable mechanical engagement means such a snap fit engagement or a clasping engagement.

[0074] With reference to Fig. IF, the opening 18 enables grout extruded from the grout extruder 102 to be discharged through the grout nozzle 10. The opening 18 is positioned on a surface that faces the grout extruder 102. The opening 18 may be positioned centrally in the coupling member 12. Opening 18 may be bordered by the coupling means 16 The coupling means 16 may surround the opening 18. In another embodiment, the opening 18 may be defined by the coupling means 16. In an alternative embodiment, the opening 18 may be provided in the coupling means 16. Fig IF is representative of a bottom view of the embodiments of Figs. 2 to 4. The embodiments of Figs. 2 to 4 have a structure with the opening 18 as in the first embodiment of Fig. 1. Fig. 5 has an opening 18 shown in Fig. IF Fig. 6 has a plurality of the openings 18.

[0075] In an embodiment, the grout is discharged directly into the grout nozzle 10. Grout from the grout extruder 102 is generally discharged into the opening 18 at substantially the same pressure as the extrusion pressure. In an alternative embodiment, the grout discharge pressure may be different from the grout extrusion pressure.

[0076] With reference to Figs 1 to 6 and 8 to 17, the grouting member 14 is configured for applying grout into gaps in an application zone. Grouting member 14 faces the application zone and contacts the surface of the application zone during application of grout. The grouting member 14 is configured to perform the application of the grout discharged from the grout extruder 102 to the application zone. Grout discharged into the opening 18 flows through the body of the grout nozzle 10 to the grouting member 14.

[0077] The grouting member 14 comprises a grout surface 20, containment means 22, at least one outlet 26 and at least one scraper 30 The grout surface 20 is an external layer of the grouting member 14. In an embodiment, grout surface 20 is formed on the opposite side to the surface having the opening 18. The grout surface 20 may be a portion of the external surface of the grouting member 14. In an embodiment, the grout surface 20 may comprise the entire external surface of the grouting member 14. The grout surface 20 faces the application zone during operation of the grout nozzle 10. In an embodiment, the grout surface 20 may be a plane surface. Grout surface 14 may be substantially parallel to a surface of the application zone. Grout flowing out from the grout nozzle 10 leaves through the grout surface 20. The grout may flow along the grout surface 20 as the grout nozzle 10 moves along the grouting direction X.

[0078] The containment means 22 contain flow of the grout on the grout surface 20. By restricting the flow of grout, the containment means 22 regulate the hydrostatic pressure of the grout. The containment means 22 extend from the grout surface 20 Containment means 22 extend substantially vertically relative to the grout surface 20. In an embodiment, containment means 22 may be perpendicular to the grout surface 20. The containment means 22 may be rigidly provided on the grout surface 20. The containment means 22 may be monolithic with the grout surface 20.

[0079] Containment means 22 have a free edge 23 that contacts the surface of the application zone during operation. The free edge 23 is elevated relative to the grout surface 20. Height of the containment means 22 determines the magnitude of elevation of the free edge 23 and the quantity of grout that can be contained. The height of the containment means 22 is constant such that the free edge 23 has a uniform elevation across the containment means 22. In an embodiment, the height of the containment means 22 may vary continuously from the first end 11 to the second end 13 or vice versa such that the elevation of the free edge 23 changes accordingly Free edge 23 may be flat. Free edge 23 may be parallel to the grout surface 20 and / or the surface of the application zone. In an alternative embodiment, free edge 23 may be inclined or curved.

[0080] The containment means 22 define a grout flow zone 24 on the grout surface 20 The grout flow zone 24 is defined by the containment means 22, the grout surface 22 and a plane formed on the free edge 23. The grout flow zone 24 is bound by the containment means 22 relative to the horizontal axis of the grout flow zone 24. The containment means 22 sets the lateral limits for the grout flow zone 24. The grout flow zone 24 is bound by the grout surface 20 relative to the vertical axis of the grout flow zone 24. The grout surface 20 sets an upper limit and the plane formed by the free edge 23 sets the lower limit. Grout flow over the grout surface 20 and through the grout zone 24 is contained by the containment means 22 and the grout surface 20 in conjunction with the surface of the application zone.

[0081] Application of grout in the application zone is controlled by the quantity, hydrostatic pressure and flow of grout in the grout flow zone 24. The sides of the containment means 22 that define the grout flow zone 24 may be substantially perpendicular to the grout surface 20 to retain the flow of grout and the hydrostatic pressure of grout in the grout flow zone 24.

[0082] Unused grout may flow away from the grout zone 24 through an area not restricted by any containment means 22. A passage 25 may formed at an area without containment means 22. Tn an embodiment, a plurality of passages 25 may be formed in the containment means 22. In an alternative embodiment, the containment means 22 may be formed without a passage 25. In yet another embodiment, the containment means 22 may be formed with a passage 25 that is occluded by a scraper as hereinafter disclosed.

[0083] In an embodiment, the containment means 22 comprises a plurality of containment walls 22. The containment walls 22 at least partially surround the grout surface 20. An area on the grout surface 20 may remain without any containment walls 22 The containment walls 22 extend horizontally over the grout surface 20. The containment walls 22 extend linearly across the grout surface 20.

[0084] In an embodiment, the containment walls 22 comprise a pair of sidewalls 40, 42 that extend on opposite sides of the grout surface 20. The pair of sidewalls 40, 42 may be parallel to each other and have the same axial length. The pair of sidewalls 40, 42 may be parallel to the longitudinal axis A. The pair of sidewalls 40, 42 extend linearly from the first end 11 towards the second end 13. The containment walls 22 may comprise an end wall 44 that connects the pair of sidewalls 40, 42 at an end of the grouting surface 20. End wall 44 may be positioned adjacent to or at the first end 11 End wall 44 may be flush with the first end 11. The end wall 44 is perpendicular to the pair of sidewalls 40, 42. The end wall 44 extends transversely to the longitudinal axis A. The length of the end wall 44 is determined by the mutual distance between the sidewalls 40, 42. The pair of sidewalls 40, 42 may not be mutually connected at the end opposite the end wall 44 thereby forming the passage 25.

[0085] In another embodiment, the containment means 22 comprises a single containment wall 22. The containment wall 22 at least partially surrounds the grout surface 20. An area on the grout surface 20 may remain without any containment wall 22. The containment wall 22 is formed by a single wall without angles. The containment wall 22 extends horizontally over the grout surface 20. The containment wall 22 may be curved, arcuate shaped or circular arc shaped. The ends of the containment wall 22 do not contact so as to form the passage 25.

[0086] In an alternative embodiment, the containment wall 22 or containment walls 22 may be configured to contain grout flow over the entire grout surface 20. Containment walls 22 encircle the entire grout surface 20. A passage 25 is not formed in this embodiment of the containment wall 22 or containment walls 22. The outlet 26 provides for the egress of the extruded grout Grout extruded from the grout extruder 102 into the opening 18 passes therefrom and through the outlet 26 into the grout flow zone 24. The outlet 26 is provided in the grout surface 20 and is positioned in the grout flow zone 24. Outlet 26 is formed at the level of the grout surface 20. The outlet 26 is connected to a through hole that connects to the opening 18. The through hole may extend through the body of the grout nozzle 10.

[0087] Outlet 26 may be shaped and dimensioned according to the grout application requirement of the grout nozzle 10. In an embodiment, the outlet 26 is rectangular in plan view. The outlet 26 is orientated such that longitudinal axis thereof is perpendicular to the longitudinal axis A. Grout egresses from the outlet 26 at substantially the same pressure as the extrusion pressure. In an alternative embodiment, the grout egress pressure may be different from the grout extrusion pressure.

[0088] The outlet 26 is located at an end of the grout surface 20 Outlet 26 is positioned at the leading end of the grout surface 20 relative to the grouting direction X. Outlet 26 is positioned adjacent the first end 11. Outlet 26 is positioned adjacent the containment means 22. In an embodiment, outlet 26 is contiguous with the containment means 22. Particularly, outlet 26 is adjacent the end wall 44. The outlet 26 may be contiguous with the end wall 44.

[0089] Outlet 26 is positioned centrally relative to the sides of the grout nozzle 10. The outlet 26 is located along the longitudinal axis A. In an embodiment, longitudinal axis A passes through the centre of the outlet 26.

[0090] The grouting member 14 may have a first outlet which is outlet 26 and a second outlet 28. The second outlet 28 provides for further egress point of the extruded grout. Grout extruded from the grout extruder 102 into a second opening 19, as shown in Fig. IF, passes therefrom and through the second outlet 28 into the grout flow zone 24. The second outlet 28 is provided in the grout surface 20 and is positioned in the grout flow zone 24. The second outlet 28 is formed at the level of the grout surface 20. The second outlet 28 is connected to a through hole that connects to the second opening 19. The through hole may extend through the body of the grout nozzle 10

[0091] In another embodiment (not shown), both the first and second outlets 26, 28 may be connected to the first opening 18. Grout extruded from the grout extruder 102 into the first opening 18 passes therefrom and through the first and second outlets 26, 28 into the grout flow zone 24.

[0092] The second opening 19 is axially spaced away from the first opening 18. Grout extruded from the grout extruder 102 is discharged from both the first and second openings 18, 19. Fig. IF is representative of a bottom view of the embodiments of Figs. 2 to 4. The embodiments of Figs. 2 to 4 have a structure with the second opening 19 as in the first embodiment of Fig. 1

[0093] Second outlet 28 may be shaped and dimensioned according to the grout application requirement of the grout nozzle 10. In an embodiment, the second outlet 28 is rectangular in plan view. The second outlet 28 is orientated such that longitudinal axis thereof is parallel to the longitudinal axis A. In an embodiment, the longitudinal axis of the second outlet 28 is coincident with the longitudinal axis A.

[0094] Grout egresses from the second outlet 28 at substantially the same pressure as the extrusion pressure. In an alternative embodiment, the grout egress pressure may be different from the grout extrusion pressure. Grout egressing from the second outlet 28 mixes with residual grout from the first outlet 26 that is not pushed into the grout line

[0095] The second outlet 28 is located at an end of the grout surface 20. Second outlet 28 is positioned at the trailing end of the grout surface 20 relative to the grouting direction X. The second outlet 28 is spaced away from the first end 11 and positioned towards the second end 13. Second outlet 28 may be positioned adjacent the second end 13. In an embodiment, second outlet 28 is positioned adjacent the passage 25 in the containment means 22. In an alternative embodiment, the second outlet 28 may be positioned in the passage 25. In yet another embodiment, second outlet 28 is positioned adjacent the containment means 22.

[0096] The second outlet 28 is positioned centrally relative to the sides of the grout nozzle 10. The second outlet 28 is located along the longitudinal axis A. In an embodiment, longitudinal axis A passes through the centre of the second outlet 28.

[0097] The first outlet 26 is axially spaced apart from the second outlet 28 in the grout flow zone 24. First outlet 26 precedes the second outlet 28 along the grouting direction X. First outlet 26 is positioned between the first end 11 and the second outlet 28. The length of the first outlet 26 is longer than the width of the second outlet 28 wherein the length of the first outlet 26 and the width of the second outlet 28 are both orientated perpendicular to the longitudinal axis A. The width of the first outlet 26 is shorter than the length of the second outlet 28 wherein the width of the first outlet 26 and the length of the second outlet 28 are parallel or coincident to the longitudinal axis A

[0098] In an embodiment, the grouting member 14 may have a plurality of first and / or second outlets 26, 28. The plurality of first outlets 26 may be linearly arranged along the longitudinal axis A between the end wall 44 and the second outlet 28. The plurality of first outlets 26 may be arranged to be mutually equidistant along the longitudinal axis A. The first outlets 26 are each connected to corresponding first openings 18. The terminal first outlet 26 that is closest to the second end 13 is followed by the second outlet 28 In a further embodiment, a plurality of second outlets 28 may be positioned linearly along the longitudinal axis A between the first outlet 26 and the second end 13. The plurality of second outlets 28 may be positioned to be mutually equidistant along the longitudinal axis A. The second outlets 28 are each connected to corresponding second openings 19.

[0099] Grout egressing from the following first outlet 26 or plurality of outlets 26 mixes with residual grout from the preceding first outlet 26 that is not pushed into the grout line prior to arriving to the following second outlet 28 or plurality of outlets 28. Grout egressing from the following second outlet 28 or plurality of outlets 28 mixes with residual grout from the preceding first outlet 26 or plurality of first outlets 26 that is not pushed into the grout line.

[0100] The scraper 30 is configured to push the egressed grout into gaps in the application zone. During operation, grout exiting from the outlet 26 comes into contact with the scraper 30 and is pushed by the scraper 30 along the grout line and into the gaps that are required to be filled. The scraper 30 extends from the grout surface 20 and is positioned in the grout flow zone 24. The scraper 30 extends substantially vertically relative to the grout surface 20. In an embodiment, scraper 30 may extend perpendicularly relative to the grout surface 20. The scrapper 30 may be rigidly provided on the grout surface 20. The scraper 30 may be monolithic with the grout surface 20.

[0101] The scraper 30 has a free edge 31 that contacts the surface of the application zone during operation. The free edge 31 is elevated relative to the grout surface 20. Height of the scraper 30 determines the magnitude of elevation of the free edge 31. Free edge 31 may be flat. The free edge 31 may be parallel to the grout surface 20 and / or the surface of the application zone. In an alternative embodiment, free edge 31 may be inclined or curved. Scraper 30 may extend to the same height as the containment means 22. Free edge 31 of the scraper 30 may have the same elevation as the free edge 23 of the containment means 22. Tn an embodiment, free edge 31 of the scraper 30 may be flush with free edge 23 of the containment means 22.

[0102] The scraper 30 is located towards an end of the grout surface 20. Scraper 30 is positioned towards the leading end of the grout surface 20 relative to the grouting direction X. Scraper 30 is positioned towards the first end 11 and spaced away from the second end 13. Scraper 30 is positioned adjacent the first outlet 26.

[0103] The scraper 30 may be positioned centrally relative to the sides of the grout nozzle 10. The scraper 30 may be located along the longitudinal axis A. In an embodiment, longitudinal axis A passes through the centre of the scraper 30. Scraper 30 is positioned axially adjacent the first outlet 26. The first outlet 26 and the scraper 30 are axially aligned. In an embodiment, first outlet 26 and the scraper 30 are mutually aligned on the longitudinal axis A. Scraper 30 may be centrally positioned relative to the first outlet 26.

[0104] In an embodiment, the scraper 30 has a rectangular base in plan view. Scraper 30 is orientated such that the longitudinal axis of the rectangular base is perpendicular to the longitudinal axis A. In an embodiment, the length of the rectangular base of the scraper 30 is shorter than the length of the first outlet 26 wherein the respective lengths are perpendicular to the longitudinal axis A. In another embodiment, the length of the rectangular base of the scraper 30 is the same as the length of the first outlet 26.

[0105] The scraper 30 may have a face 33 that faces the first outlet 26. The face 33 may be inclined. The inclined face 33 extends from the base of the scraper 30 to the free edge 31. The base is formed on the grout surface 20. In an embodiment, the base may form part of the grout surface 20. In another embodiment, the base may be raised from the grout surface 20. The base may be raised perpendicular to the grout surface 20.

[0106] The inclined face 33 may be inclined away from the first outlet 26 The inclined face 33 has an angle of inclination relative to the base. The angle of inclination may be from 30 degrees to 60 degrees relative to the grout surface 20. Particularly, the angle of inclination may be 45 degrees relative to the grout surface 20. In an embodiment, the inclined face 33 is adjacent the first outlet 26 and the free edge 31 is axially spaced away from the first outlet 26 from a plan view. The base edge of the inclined face 33 may be conjunct with the first outlet 26. In another embodiment, the inclined face 33 is spaced away from the first outlet 26 and the free edge 31 is positioned axially spaced away from the first outlet 26 from a plan view. The base edge of the inclined face 33 may be spaced away from the first outlet 26.

[0107] In an embodiment, the inclined face 33 may be inclined towards the first outlet 26. The inclined face 33 has an angle of inclination relative to a plane formed by the first outlet 26 or the grout surface 20. The plane of the first outlet 26 is level to the grout surface 20 surrounding the first outlet 26. The angle of inclination may be from 30 degrees to 60 degrees relative to the plane of the first outlet 26 or the grout surface 20. Particularly, the angle of inclination may be 45 degrees relative to the plane of the first outlet 26 or the grout surface 20. In an embodiment, the inclined face 33 is adjacent the first outlet 26 and the free edge 31 is positioned axially over the first outlet 26 from a plan view. The base edge of the inclined face 33 may be conjunct with the first outlet 26. In another embodiment, the inclined face 33 is spaced away from the first outlet 26 and the free edge 31 is positioned adjacent or axially spaced away from the first outlet 26 from a plan view. The base edge of the inclined face 33 may be spaced away from the first outlet 26.

[0108] In an embodiment, the scraper 30 may have a form of a right angled prism with a rectangular face formed on the grout surface 20 and the triangular sides positioned to be substantially parallel to the longitudinal axis A with the right angled comers being opposite to the first outlet 26. The inclined face 33 being opposite to the right angled corners is faces to the first outlet 26. The tip being truncated to form the free edge 31.

[0109] In an embodiment, the face 33 may be perpendicular to the grout surface 20 or the plane of the first outlet 26. The perpendicular face 33 extends from the base of the scraper 30 to the free edge 31. The base is formed on the grout surface 20. In an embodiment, the base may form part of the grout surface 20. In another embodiment, the base may be raised from the grout surface.

[0110] In an embodiment, the perpendicular face 33 is adjacent the first outlet 26 and the free edge 31 is positioned axially adjacent to the first outlet 26 from a plan view. The base edge of the perpendicular face 33 may be conjunct with the first outlet 26. Tn another embodiment, the perpendicular face 33 is spaced away from the first outlet 26 and the free edge 31 is positioned axially spaced away from the first outlet 26 from a plan view. The base edge of the perpendicular face 33 may be spaced away from the first outlet 26.

[0111] In an embodiment, the scraper 30 may have a form of a right angled prism with a rectangular face formed on the grout surface 20, the triangular sides positioned to be substantially parallel to the longitudinal axis A. The perpendicular face 33 faces the first outlet 26. The tip being truncated to form the free edge 31.

[0112] The first outlet 26 precedes the scraper 30 along the grouting direction X. First outlet 26 is positioned between the scraper 30 and the first end 11. The first outlet 26 is positioned between the scraper 30 and the containment means 22. First outlet 26 is positioned between the scraper 30 and the containment means 22 relative to the longitudinal axis A. Particularly, first outlet 26 is positioned between the scraper 30 and the end wall 44. In an embodiment, the scraper 30 is contiguous with the first outlet 26. An edge of the scrapper 30 may border the first outlet 26. The first outlet 26 may be interposed between the scraper 30 and the end wall 44. In alternative embodiment, the scraper 30 may be spaced away from the first outlet 26. The alignment of the first outlet 26 and the scraper 30 on the longitudinal axis A forms an axial first grouting arrangement. The pair of sidewalls 40, 42 are positioned on opposite sides of the first grouting arrangement of the scraper 30 and the first outlet 26.

[0113] The grouting member 14 may have a first scraper which is scraper 30 and a second scraper 32. The second scraper 32 is configured to push the residual grout into gaps in the application zone. In an embodiment, the grout nozzle 10 may comprise the first arrangement of the first outlet 26 and the first scraper 30 with a second scraper 32 that is spaced away from the first scraper 30.

[0114] During operation, grout exiting from the outlet 26 comes into contact with the first scraper 30 and is pushed along the grout line and into the gaps that are required to be filled. The grout that is not pushed into the gaps become residual grout which moves along the grout flow zone 24 to the second outlet 28 or the second scraper 32.

[0115] In an embodiment, the residual grout or the combined residual grout and grout egressed from the second outlet 28 comes into contact with the second scraper 32 and is pushed along the same portion of the grout line and is pushed int the same portion of the gaps having grout therein. The second scraper 32 is configured to provide a finishing. In an embodiment, the second scraper 32 aids in pushing some residual grout into the grout line.

[0116] The second scraper 32 extends from the grout surface 20 and is positioned in the grout flow zone 24. The second scraper 32 extends substantially vertically relative to the grout surface 20. In an embodiment, second scraper 32 may extend perpendicularly relative to the grout surface 20 The second scrapper 32 may be rigidly provided on the grout surface 20. The second scraper 32 may be monolithic with the grout surface 20.

[0117] The second scraper 32 has a free edge 35 that contacts the surface of the application zone during operation. The free edge 35 is elevated relative to the grout surface 20. Height of the second scraper 32 determines the magnitude of elevation of the free edge 35. Free edge 35 may be flat. Free edge 35 may be parallel to the grout surface 20 and / or the surface of the application zone. In an alternative embodiment, free edge 35 may be inclined or curved

[0118] Second scraper 32 may extend to the same height as the first scraper 30. Free edge 35 of the second scraper 32 may have the same elevation as the free edge 23 of the containment means 22. Second scraper 32 may extend to the same height as the containment means 22. In an embodiment, free edge 35 of the second scraper 32 may be flush with free edge 23 of the containment means 22. Free edge 35 of the second scraper 32 may have the same elevation as the free edge 31 of the first scraper 30. In an embodiment, free edge 35 of the second scraper 32 may be flush with free edge 31 of the first scraper 30. Free edge 35 of the second scraper 32 may have the same width as the free edge 31 of the first scraper 30 wherein the respective widths are parallel to the longitudinal axis A.

[0119] The second scraper 32 is located at towards an end of the grout surface 20. Second scraper 32 is positioned towards the trailing end of the grout surface 20 relative to the grouting direction X. Second scraper 32 is positioned towards the second end 13 and spaced away from the first end 11. Second scraper 32 is positioned between the second outlet 28 and the second end 13. Second scraper 32 may be positioned adjacent the second outlet 28. Second scraper 32 may be positioned in the passage 25 of the containment means 22. Second scraper 32 may be centrally positioned in the passage 25. The second scrapper 32 may be positioned between the ends of the containment walls 22 or the sidewalls 40, 42. In an embodiment, second scrapper occludes the passage 25

[0120] The second scraper 32 may be positioned centrally relative to the sides of the grout nozzle 10. The second scraper 32 may be located along the longitudinal axis A. In an embodiment, longitudinal axis A passes through the centre of the second scraper 32. Second scraper 32 is positioned axially adjacent the second outlet 28. The second outlet 28 and the second scraper 32 are axially aligned. In an embodiment, second outlet 28 and the second scraper 32 are mutually aligned on the longitudinal axis A

[0121] In an embodiment, the second scraper 32 has a rectangular base in plan view. Second scraper 32 is orientated such that the longitudinal axis of the rectangular base is perpendicular to the longitudinal axis A In an embodiment, the length of the base of the second scraper 32 is longer than the width of the second outlet 28 wherein the length of the base of the second scrapper 32 and the width of the second outlet 28 are perpendicular to the longitudinal axis A. In another embodiment, the length of the base of the scraper 30 is the same as the width of the second outlet 28.

[0122] The second scraper 32 may have a face 37 that faces the second outlet 28. The face 37 extends from the base of the second scraper 32 to the free edge 35. The base is formed on the grout surface 20. In an embodiment, the base may form part of the grout surface 20. In another embodiment, the base may be raised from the grout surface. The face opposite to the face 37 and facing away from the second outlet 28 may be perpendicular or inclined to the grout surface 20.

[0123] In an embodiment, the face 37 may be perpendicular to the grout surface 20 or the plane of the second outlet 28. The perpendicular face 37 may be adjacent the second outlet 28 and the free edge 35 is positioned axially adjacent to the second outlet 28 from a plan view. The base edge of the perpendicular face 37 may be adjacent the second outlet 28. In another embodiment, the perpendicular face 37 is spaced away from the second outlet 28 and the free edge 35 is positioned axially spaced away from the second outlet 28 from a plan view. The base edge of the perpendicular face 37 may be spaced away from the second outlet 28. The face opposite to the perpendicular face 37 and facing away from the second outlet 28 may be inclined to the grout surface 20.

[0124] In an embodiment, the second scraper 32 may have a form of a right angled prism with a rectangular face formed on the grout surface 20, the triangular sides positioned to be substantially parallel to the longitudinal axis A. The perpendicular face 37 faces the second outlet 28. The tip being truncated to form the free edge 35.

[0125] In alternative embodiment, the face 37 may be inclined The inclined face 37 extends from the base of the second scraper 32 to the free edge 35. The base that is formed on the grout surface 20. In an embodiment, the base may form part of the grout surface 20. In another embodiment, the base may be raised from the grout surface. The face opposite to the face 37 and facing away from the second outlet 28 may be perpendicular to the grout surface 20.

[0126] In an embodiment, the inclined face 37 may be inclined away from the second outlet 27. The inclined face 37 has an angle of inclination relative to grout surface 20. The angle of inclination may be from 30 degrees to 60 degrees relative to the grout surface 20. Particularly, the angle of inclination may be 45 degrees relative to the grout surface 20. In an embodiment, the inclined face 37 is adjacent the second outlet 28 and the free edge 35 is axially spaced away from the second outlet 28 from a plan view. The base edge of the inclined face 37 may be conjunct with the second outlet 28. In another embodiment, the inclined face 37 is spaced from the second outlet 28 and the free edge 35 is axially spaced from the second outlet 28 from a plan view. The base edge of the inclined face 37 may be spaced away from the second outlet 28. The face opposite to the inclined face 37 and facing away from the second outlet 28 may be inclined or perpendicular to the grout surface 20.

[0127] In an alternative embodiment, the inclined face 37 may be inclined towards the second outlet 28 The inclined face 37 has an angle of inclination relative to a plane formed by the second outlet 28 or the grout surface 20. The plane of the second outlet 28 is level to the grout surface 20 surrounding the second outlet 28. The angle of inclination may be from 30 degrees to 60 degrees relative to the plane of the second outlet 28 or the grout surface 20. Particularly, the angle of inclination may be 45 degrees relative to the plane of the second outlet 28 or the grout surface 20. In an embodiment, the inclined face 37 is adjacent the second outlet 28 and the free edge 35 is positioned over the second outlet 28 from a plan view. The base edge of the inclined face 37 may be conjunct with the second outlet 28. In another embodiment, the inclined face 37 is spaced away from the second outlet 28 and the free edge 35 is adjacent or axially spaced from the second outlet 28 from a plan view The base edge of the inclined face 37 may be spaced away from the second outlet 28. The face opposite to the inclined face 37 and facing away from the second outlet 28 may be inclined or perpendicular to the grout surface 20.

[0128] In an embodiment, the second scraper 32 may have a form of a right angled prism with a rectangular face formed on the grout surface 20, the triangular sides positioned to be substantially parallel to the longitudinal axis A and with the right angled corners being opposite to the second outlet 28. The inclined face 37 faces the second outlet 28. The tip being truncated to form the free edge 31.

[0129] The first scraper 30 is axially spaced apart from the second scraper 32 in the grout flow zone 24. The second outlet 28 precedes the second scraper 32 along the grouting direction X. Second outlet 28 is positioned between the second scraper 32 and the first end 11 relative to the longitudinal axis A. Second scraper 32 is positioned between the second outlet 28 and the second end 13 along the longitudinal axis A. Second scraper 32 may be positioned between the second outlet 28 and the passage 25. The second outlet 28 is positioned between the scraper 30 and the containment means 22 relative to the longitudinal axis A Particularly, second outlet 28 is positioned between the second scraper 32 and the end wall 44.

[0130] The alignment of the second outlet 28 and the second scraper 32 on the longitudinal axis A forms the second grouting arrangement. The pair of sidewalls 40, 42 are positioned on opposite sides of the second grouting arrangement of the second scraper 32 and the second outlet 28.

[0131] In another embodiment, a second pair of sidewalls 46, 48 are positioned on opposite sides of the second grouting arrangement of the second scraper 32 and the second outlet 28. The distance of the grouting surface 20 between the first pair of sidewalls 40, 42 is greater than the distance of the grouting surface 20 between the second pair of sidewalls 46, 48. The second pair of sidewalls 46, 48 may be raised relative to the grout surface 20. The second pair of sidewalls 46, 48 may have the same height as the first pair of sidewalls 40, 42. In this embodiment, the second pair of sidewalls 46, 48 may be either perpendicular or inclined relative to the grout surface 20. Alternatively, the second pair of sidewalls 46, 48 may be at the same level as the grout surface 20. The second grouting arrangement of the second outlet 28 and the second scraper 32 is aligned to the first grouting arrangement of the first outlet 26 and the first scraper 30 on the longitudinal axis A. Thus, the first and second outlets 26, 28 and the first and second scrapers 30, 32 are all mutually aligned on the longitudinal axis A. The first and second scrapers 30, 32 alternate with the first and second outlets 26, 28 where each outlet 26, 28 precedes the corresponding scraper 30, 32 in the grouting direction X. In another embodiment, the grout nozzle 10 may comprise the first grouting arrangement of the first outlet 26 and the first scraper 30 with an axial second grouting arrangement of the second outlet 28 and the second scraper 32 that is spaced away from the first scraper 30.

[0132] In an embodiment, the grouting member 14 may have a plurality of first and / or second scrapers 30, 32. The plurality of first scrapers 30 may be arranged linearly along the longitudinal axis A between the first end 11 and the second outlet 28 or the second scraper 32. The plurality of first scrapers 30 may be arranged to be mutually equidistant along the longitudinal axis A. The terminal first scraper 30 that is closest to the second end 13 is followed by either the second outlet 28 or the second scraper 32, or both. The plurality of first scrapers 30 serve to pack the gap along the grout line with grout while the second scraper 32 serves to provide a finishing. The further application of grout by plurality of first scrapers 30 forces the first layer of grout deeper into the gap thereby substantially filling the gap. This further reduces the chances of having air pockets in the gaps along the grout line.

[0133] The plurality of second scrapers 32 may be arranged linearly along the longitudinal axis A between the first scraper 26 or the second outlet 28 and the second end 13. The plurality of second scrapers 32 may be arranged to be mutually equidistant along the longitudinal axis A.

[0134] In an embodiment, each first outlet 26 precedes a corresponding first scraper 30 and each second outlet 28 precedes a second scraper 32 in the grouting zone 24 from the first end 11 to the second end 13. In a plurality of first and second outlets 26, 28 and a plurality of first and second scrapers 30, 32, the first outlets 26 alternate with the first scrapers 30 prior to the second outlets 28 alternating with the second scrapers 32.

[0135] In an embodiment, a plurality of first scrapers 30 alternate with a plurality of first outlets 26 with a first outlet 26 positioned in the lead and a first scraper 30 positioned at the end. Tn an embodiment, a plurality of second scrapers 32 alternate with a plurality of second outlets 28 with a second outlet 28 positioned in the lead and a second scraper 32 positioned at the end.

[0136] Tn another embodiment, a plurality of first grouting arrangements of first outlets 26 and first scrapers 30 is positioned prior to the second grouting arrangements of a second outlet 28 and a second scraper 32. The plurality of first grouting arrangements is mutually spaced apart The plurality of first grouting arrangements is mutually spaced apart along the direction of the longitudinal axis A.

[0137] In a further embodiment, with reference to Fig. 6, a plurality of first grouting arrangements of the first outlets 26 and the first scrapers 30 is positioned prior to a plurality of the second grouting arrangements of the second outlets 28 and the second scrapers 32. In the plurality of the first grouting arrangements the first scrapers 30 are contiguous with the first outlets 26 The faces 33 of the first scrapers 30 adjacent to the second outlets 28 are inclined. In the plurality of the second grouting arrangements the second scrapers 32 are spaced apart from the second outlets 28. The terminal second scraper 32 nearer the second end 13 has a perpendicular face 37 that faces the corresponding second outlet 28 The second scraper 32 nearer the first end 13 has an inclined face 37 that faces the corresponding second outlet 28.

[0138] Residual grout cascades from a preceding grouting arrangement to the next along the grouting direction. The sidewalls 40, 42 are positioned on opposite sides of the plurality of the aforesaid grouting arrangements.

[0139] In an embodiment, the second scraper 32 is contiguous with the second outlet 28. Tn an embodiment, first scraper 30 is contiguous with the corresponding first outlet 28 and second scraper 32 is spaced apart from the second outlet 28. In an alternative embodiment, first and second scraper 30, 32 are contiguous with the corresponding first and second outlets 26, 28.

[0140] With reference to Figs. 1 to 4, the grouting member 14 further comprises a flow guide 34 for redirecting the residual grout towards the second outlet 28 and / or the second scraper 32. Residual grout flows away from the first scraper 30 and is guided by the flow guide 34 to the second outlet 28 and / or the second scraper 32 in the grout flow zone 24. The flow guide 34 extending from the grout surface 20 and being positioned in the grout flow zone 24 The flow guide 34 extends substantially vertically relative to the grout surface 20. In an embodiment, the flow guide 34 may be perpendicular to the grout surface 20.

[0141] The flow guide 34 projects horizontally on the grout surface 20 from the containment means 22 into the grouting zone 24. The flow guide 34 may be positioned in the grouting zone 24 after the first scraper 30. In a plurality of first outlets 28 and first scrapers 30, a plurality of flow guides 34 is provided after each first scraper 30. In a plurality of first grouting arrangements of the first outlets 26 and the first scrapers 30, a flow guide 34 may be positioned after each of said first grouting arrangements. A flow guide 34 may be provided after a plurality of first grouting arrangements. With reference to Fig 6, a pair of flow guides 34 extend from opposite containment walls 22 towards respective second outlets 28.

[0142] The flow guide 34 comprises a first flange 36 and a second flange 38. The first flange 36 and the second flange 38 may be inclined relative to the longitudinal axis A on the horizontal axis. Each flange 36, 38 is inclined away from the first outlet 26 and towards the second outlet 28 or the second scraper 32. The first flange 36 and the second flange 38 may each be inclined from the first end 11 towards the second end 13. The first flange 36 and the second flange 38 may have the same length.

[0143] The first flange 36 and the second flange 38 respectively projects from the containment walls 22 on opposite sides of the grout surface 20. The first flange 36 projects from a first containment wall 22 and the second flange 38 projects from a second containment wall 22 wherein the first containment wall 22 faces the second containment wall 22. The first flange 36 projects from the sidewall 40 and the second flange 38 projects from the opposite sidewall 42. First and second flanges 36, 38 are inclined relative to respective sidewalls 40, 42. In another embodiment, the flow guide 34 is interposed between the first pair of sidewalls 40, 42 and the second pair of side walls 46, 48.

[0144] In an embodiment, the first and second flanges 36, 38 project towards the second outlet 28 or second scraper 32. The first and second flanges 36, 38 terminate at the second outlet 28 or second scraper 32 Residual grout is redirected directly towards either the second outlet 28 or second scraper 32. In another embodiment, the first and second flanges 36, 38 project towards to an area between the first scraper 30 and the second outlet 28 or second scraper 32. The first and second flanges 36, 38 terminate at the area between the first scraper 30 and the second outlet 28 or second scraper 32. Residual grout is redirected towards an area that precedes either the second outlet 28 or second scraper 32.

[0145] In an embodiment, the first and second flanges 36, 38 are formed as upright walls that linearly project across the grout surface 20. In another embodiment, the first and second flanges 36, 38 are formed as extensions of the containment walls 22.

[0146] The first and second flanges 36, 38 have respective free edges 39 that contact the surface of the application zone during operation. The free edges 39 are elevated relative to the grout surface 20. Height of the first and second flanges 36, 38 determine the magnitude of elevation of the respective free edges 39 and the quantity of residual grout that can be redirected. First and second flanges 36, 38 extend to the same height. The height of the first and second flanges 36, 38 is constant such that the respective free edges 39 have a uniform elevation. Free edges 39 may be flat Free edges 39 may be parallel to the grout surface 20 and / or the surface of the application zone. In an alternative embodiment, free edges 39 may be inclined or curved.

[0147] First and second flanges 36, 38 extend to the same height as the containment means 22. First and second flanges 36, 38 extend to the same height as the first and second scrapers 30, 32. Free edges 39 of the first and second flanges 36, 38 are flush with the free edge 23 of the containment means 22, the free edges 31 of the first scraper 30 and free edge 35 of the second scraper 32.

[0148] In an embodiment, a pliable connecting member 50 is interposed between the coupling member 12 and the grouting member 14. The pliable connecting member 50 enables the grouting member 14 to move relative to the coupling member 12. The first outlet 26 is connected to the first opening 18 via a through hole that passes through the pliable member 50. In an embodiment, the second outlet 28 is connected to the second opening 19 via a through hole that passes through the pliable member 50. In an embodiment, the pliable connecting member 50 may be made from an elastomeric polymer. Such a polymer may be rubber or a rubber-like substance.

[0149] With reference to Figs. 1A to IF and Fig. 5, the first embodiment and the alternative to the first embodiment comprises the general features herein described. In addition, the first embodiment and the alternative to the first embodiment has the following features The grouting member 14 and the coupling member 12 are formed as a monolithic structure. The grouting member 14 has an exterior surface 15, opposite to the coupling member 12, that is flat. The first outlet 26 is interposed between the end wall 44 and the first scraper 30. The inclined face 33 of the first scraper 30 is inclined away from the first outlet 26.

[0150] Specifically with reference to Figs. 1A to IF, the second outlet 28 is axially spaced from the first scraper 30. The first and second flanges 36, 38 project towards and terminate at the second outlet 28. The second scraper 32 is axially spaced away from the second outlet 28. The second scraper 32 has a perpendicular face 37. The second scraper 32 is axially spaced away from the second end 13.

[0151] The containment walls 22 rise from the exterior surface 15 to cordon the grout surface 20 from the rest of the exterior surface 15. Sidewalls 40, 42 of the containment walls 22 are vertical internally along the grout flow zone 24. On the exterior of the grout flow zone 24, the sidewalls 40, 42 are inclined. The external inclined surfaces of the sidewalls 40, 42 extend from the boundary of the exterior surface 15 towards the free edge 23. Adjacent the free edge 23 the inclined surfaces have respective upright portions connecting to the free edge 23. The ends of the sidewalls 40, 42 that define the passage 25 may be slanted relative to the longitudinal axis A. The ends may be slanted from the first end 11 towards the second end 13. The terminal points on the ends may be positioned past the second scraper 32.

[0152] With reference to Figs. 2A to 2E, the second embodiment comprises the general features herein described. In addition, the second embodiment has the following features. The grouting member 14 and the coupling member 12 are formed as a monolithic structure The grouting member 14 has an exterior surface 15, opposite to the coupling member 12, that is substantially sloped from the containment walls 22 towards the coupling member 12. In particular, with respect Figs. 2D and 2E the exterior surface 15 is convex shaped on both sides.

[0153] The first outlet 26 is interposed between the end wall 44 and the first scraper 30. The inclined face 33 of the first scraper 30 is inclined away from the first outlet 26. The second outlet 28 is axially spaced from the first scraper 30. The first and second flanges 36, 38 project towards and terminate at the second outlet 28. The second scraper 32 is axially spaced away from the second outlet 28. The second scraper 32 has a perpendicular face 37. The second scraper 32 is adjacent the second end 13. The second scraper 32 is flush with the second end 13.

[0154] The containment walls 22 rise from the exterior surface 15 to cordon the grout surface 20 from the rest of the exterior surface 15. With respect in particular to Fig. 2C, the magnitude of elevation of the containment walls 22 increases from the first end 11 to the second end 13 The height of the second scraper 32 is in line with the height of the ends of the sidewalls 40, 42.

[0155] Sidewalls 40, 42 of the containment walls 22 are vertical internally along the grout flow zone 24. On the exterior of the grout flow zone 24, the sidewalls 40, 42 are vertical. The ends of the sidewalls 40, 42 that define the passage 25 may be slanted relative to the longitudinal axis A. The ends may be slanted from the first end 11 towards the second end 13. The terminal points on the ends may be in line with a portion of the second scraper 32.

[0156] With reference to Figs. 3A to 3E, the third embodiment comprises the general features herein described. In addition, the third embodiment has the following features. The grouting member 14 and the coupling member 12 are formed as separate structures. A pliable member 50 is interposed between the grouting member 14 and the coupling member 12.

[0157] The grouting member 14 has an exterior surface 15 that is substantially inclined from the containment walls 22 to the base of the grouting member 14. In particular, with respect Figs. 3D and 3E the exterior surface 15 is inclined on both sides. The exterior surface 15 is formed on the grouting member 14.

[0158] The first outlet 26 is interposed between the end wall 44 and the first scraper 30. The inclined face 33 of the first scraper 30 is inclined away from the first outlet 26. The second outlet 28 is axially spaced from the first scraper 30. The first and second flanges 36, 38 project towards and terminate at the second outlet 28. The second scraper 32 is axially spaced away from the second outlet 28. The second scraper 32 has a perpendicular face 37. The second scraper 32 is adjacent the second end 13. The second scraper 32 is flush with the second end 13.

[0159] The containment walls 22 rise from the exterior surface 15 to cordon the grout surface 20 from the rest of the exterior surface 15. Sidewalls 40, 42 of the containment walls 22 are vertical internally along the grout flow zone 24. On the exterior of the grout flow zone 24, the sidewalls 40, 42 are vertical. The ends of the sidewalls 40, 42 that define the passage 25 may be slanted relative to the longitudinal axis A. The ends may be slanted from the first end 11 towards the second end 13 The terminal points on the ends may be positioned before the second scraper 32.

[0160] With reference to Figs. 4A to 4E, the fourth embodiment comprises the general features herein described. Tn addition, the fourth embodiment has the following features. The grouting member 14 and the coupling member 12 are formed as a monolithic structure. The grouting member 14 has an exterior surface 15 opposite to the coupling member 12. Grout surface 20 is formed as a depression into the exterior surface 15. The first outlet 26 is spaced away from the first end wall 11 and is contiguous with the first scraper 30. The inclined face 33 of the first scraper 30 is inclined away from the first outlet 26. The second outlet 28 is axially spaced from the first scraper 30.

[0161] With respect to Figs. 4C to 4E, the second scraper 32 has an elastic portion that is configured to move relative to the grouting surface 20. The second scraper 32 has a base portion 52 and an inclined portion 54. Inclined portion 54 is movable relative to the base portion 52. Inclined portion 54 is movable relative to the grout surface 20. In an embodiment, the inclined portion 54 is vertically movable. In an embodiment, inclined portion 54 is made from an elastomeric material The inclined face 37 is formed on the inclined portion 54. The inclined portion 54 has the free edge 35. The second scraper 32 is contiguous with the second outlet 28. The inclined face 37 of the second scraper 32 is inclined away from the second outlet 28 The second scraper 32 is positioned at the second end 13 and occludes the passage 25. The width of the second outlet 28 is narrower than the length of the base portion 52.

[0162] With reference to Figs. 4A and 4B, the first and second flanges 36, 38 project towards and terminate at an area between the second outlet 28 and the first scraper 30. The first and second flanges 36, 38 are formed as a part of the of the containment walls 22. The containment walls 22 are formed in the grouting member 14 and extend vertically from the raised exterior surface 15 to the depressed grout surface 20

[0163] The containment walls 22 has a first pair of sidewalls 40, 42 and a second pair of sidewalls 46, 48. The distance of grouting surface 20 between the first pair of sidewalls 40, 42 is greater than the distance of the grouting surface 20 between the second pair of sidewalls 46, 48. The first sidewalls 40, 42 and the second first sidewalls 46, 48 of the containment walls 22 are vertical internally along the grout flow zone 24.

[0164] Fig. 7 illustrates an autonomous grouting robotic apparatus 100 comprising a grout nozzle 10 herein described. The autonomous grouting robotic apparatus 100 comprises a grout extruder 102. The grout extruder 102 comprises a grout extruder mounting assembly (not shown) which either supports a grout storage container 104 or is configured to receive and support a removable grout storage container 104, and a motorised plunger (not shown). The grout storage container 104 is configured to receive the grout nozzle 10.

[0165] With reference to Figs. 8 to 17, in a further embodiment, the grout nozzle 10 may further comprise at least one effector 56. The at least one effector 56 is configured to wipe over a grouted gap. During operation as the grout nozzle 10 is moved over the grout line being filled with grout, the at least one effector 56 is moved along the filled grout line. The at least one effector 56 is able to control the required finishing of the grout in the filled gap. The softness and height of the at least one effector 56 determines the depression of the grout finish in the filled gap. The foregoing discussion of the earlier embodiments are applicable to the corresponding features of the following embodiments.

[0166] The at least one effector 56 is mounted onto the grouting member 14. The at least one effector 56 is mounted onto the surface of the grouting member 14 The at least one effector 56 may be adhered to the surface of the grouting member 14. In an embodiment, the at least one effector 56 may be mechanically fastened to the grouting member 14. In a further embodiment, the at least one effector 56 may be adhered and mechanically fastened to the grouting member 14. With reference to Figs. 10A to 10E, in an embodiment, the at least one effector 56 is supported on a plate 57 that is mechanically fastened to the grouting member 14

[0167] With reference to Figs. 8 to 17, the at least one effector 56 is positioned on the surface of the grouting member 14 posterior to the containment means 22 along the grouting direction X. The at least one effector 56 extends from the surface of the grouting member 14. In an embodiment, the at least one effector 56 is positioned on the grout surface 20 posterior to the containment means 22 along the grouting direction X. The at least one effector 56 extends from the grout surface 20

[0168] In an embodiment, the at least one effector 56 is positioned behind the containment means 22 relative to the movement of the grout nozzle 10 moving along the grouting direction X during a grouting operation. The at least one effector 56 is positioned between the second end 13 and the containment means 22.

[0169] In an embodiment, the at least one effector 56 is positioned behind a first and / or a second grouting arrangement. The at least one effector 56 may be positioned between the second end 13 and a first and / or a second grouting arrangement. In a further embodiment, the at least one effector 56 is positioned behind a plurality of first and / or second grouting arrangements The at least one effector 56 may be positioned between the second end 13 and a plurality of first and / or second grouting arrangements.

[0170] The vertical distance of the at least one effector 56 from the surface of the grouting member 14 is at least equal to or greater than the vertical distance of the first and / or second scraper 30, 32. The vertical distance of the at least one effector 56 from the surface of the grouting member 14 is at least equal to or greater than the vertical distance of a plurality of first and / or second scrapers 30, 32

[0171] In an embodiment, the vertical distance of the at least one effector 56 from the grout surface 20 is at least equal to or greater than the vertical distance of the first and / or second scraper 30, 32. The extension of the at least one effector 56 over the first and / or second scraper 30, 32 influences the finish of the grouting in the gap. The vertical distance of the at least one effector 56 from the grout surface 20 is at least equal to or greater than the vertical distance of a plurality of first and / or second scrapers 30, 32.

[0172] The at least one effector 56 is inclined relative to grouting direction (X). The at least one effector 56 is inclined relative to the grouting direction X and the longitudinal axis A of the grout nozzle 10. The inclination of at least one effector 56 results in any residual grout from the grouting operation to be directed to the cleaning mechanism in the grouting robotic apparatus 100. The at least one effector 56 is linearly extended along a longitudinal axis. The longitudinal axis of the at least one effector 56 is inclined relative to the grouting direction X and the longitudinal axis A of the grout nozzle 10.

[0173] In an embodiment, the at least one effector 56 may contact the containment means 22. An end of the at least one effector 56 may contact the containment means 22. The at least one effector 56 may extend from the containment means 22 across the surface of the grouting member 14 and / or the grout surface 20.

[0174] In an embodiment, the at least one effector 56 is laterally extended relative to containment means 22. The at least one effector 56 extends across the surface of the grouting member 14 and / or the grout surface 20 so as to extend beyond the transverse width of the containment means 22. Tn an embodiment, the at least one effector 56 is laterally extended relative to a first and / or a second grouting arrangement. The at least one effector 56 may be laterally extended relative to a plurality of first and / or second grouting arrangements.

[0175] Tn an embodiment, the grout nozzle 10 comprises a set of two or more effectors 56 wherein the effectors 56 are arranged mutually parallel on the grout surface 20. The effectors 56 are aligned to be parallel to each other. The foregoing disclosure positioning and mounting of the at least one effector 56 is applicable for the set of effectors 56.

[0176] Fig. 9D, illustrates, the effector 56 that is configured to deform during a grouting operation. The effector 56 deforms upon contact with the surface of the ground having the grout lines to be filled With reference to Figs. 9A to 9C, in an embodiment, the effector 56 is formed from as a flexible foam block. With reference to Figs. 10A to 10E, in an alternative embodiment, the effector 56 is formed from as a flexible rubber blade. The shape, form and material may be adapted to suit the surface with the grout lines and the finishing required.

[0177] Figs 9 and 10 illustrate an embodiment of the grouting arrangements with the first scrapers 30 and / or the second scrapers 32 extending between the walls of the containment means 22. The first scrapers 30 and / or the second scrapers 32 are transversely extended relative to the relative to the grouting direction X and the longitudinal axis A of the grout nozzle 10. The opposite ends the first scrapers 30 and / or the second scrapers 32 are connected to the opposite walls of the containment means 22. In this embodiment, a flow guide 34 is not present.

[0178] With reference to Figs. 8 to 17, the grout nozzle 10 may further comprise of at least one guide vane 58 for directing grout from the grout extruder 102 into a corresponding opening 18. The guide vane 58 is provided in the coupling member 12 of the grout nozzle 10. The guide vane 58 extends from the opening 18 towards the grout extruder 102. In an embodiment, the grout nozzle 10 may be provided with a plurality of guide vanes 18. Each opening 18, 19 may be provided with a corresponding guide vane 58. Figs. 11 to 13 illustrate a plurality of the guide vanes 58 with the embodiments of a plurality of effectors 56 in the form of a flexible foam block or a flexible rubber blade.

[0179] In an embodiment, the guide vane 58 may be formed as a flat quadrilateral. The guide vane 58 may be shaped as a parallelogram with a first shorter parallel side positioned at the first opening 18 and / or second opening 19 and the second longer parallel side facing the grout extruder 102. The guide van 58 is inclined relative to the plane of the first opening 18 and / or second opening 19. The guide van 58 is inclined away from the first end 11 and towards the second end 13.

[0180] With reference to Fig. 14, in an embodiment, the first scraper 30 and / or second scraper 32 are formed from a flexible rubber material. The first scraper 30 and / or second scraper 32 are able to flex during a grouting operation. The first scraper 30 and / or second scraper 32 undergo a deformation upon contact with the surface of the ground having the grout lines to be filled.

[0181] With reference to Fig. 15, in an embodiment, the first scrapers 30 and / or the second scrapers 32 are laterally inclined. The first scrapers 30 and / or the second scrapers 32 are laterally inclined relative to the relative to grouting direction (X). The first scrapers 30 and / or the second scrapers 32 are laterally inclined relative to the grouting direction X and the longitudinal axis A of the grout nozzle 10. The first scrapers 30 and / or the second scrapers 32 have an end that is connected with a wall of the containment means 22 and a free end that is adjacent the opposite wall of the containment means 22.

[0182] The first scrapers 30 and / or the second scrapers 32 are vertically inclined. Each first scrapers 30 and / or the second scrapers 32 is inclined relative to the grout surface 20 away from the first end 11 towards the second end 13. The vertically inclined first scrapers 30 and / or the second scrapers 32 along with the grout surface 20 present a channel through which the grout flows in the grout flow zone 24. The vertical inclination of the scrapers 30 and / or the second scrapers 32 mimic manual grouting.

[0183] With reference to Fig. 15B, the grout surface 20 is sloped from the end adjacent the first end 11 towards the end adjacent the second end 13. The heights of the first scrapers 30 and / or the second scrapers 32 decrease from the first end 11 to the second end 13 in correspondence with the sloped grout surface 20. The sloped grout surface 20 results in a decrease volume for the flow of grout through the grout flow zone 24. This forces the grout into the grout lines.

[0184] In this embodiment, only a single opening 18 for receiving grout and a single outlet 26 for egress of grout are provided. The free ends of the first scrapers 30 and / or the second scrapers 32 may be formed from a flexible material such as rubber.

[0185] With reference to Fig. 16, the coupling member 12 is offset relative to the grouting member 14. The openings 18, 19 are offset to the corresponding outlets 26, 28. The openings 18, 19 are connected to the corresponding outlets 26, 28 through channels 60 that run through the grout nozzle 10. The channels 60 are configured to connect the coupling member 12 that is offset to the grouting member 14.

[0186] With reference to Fig. 17, in a further embodiment, the grouting nozzle 10 comprises a first set of effectors 56 and a second set of effectors 56 wherein the first set of effectors 56 are angled relative to the second set of effectors 56 on the surface of the grouting member 14 and / or the grout surface 20 Both the first and second set of effectors 56 are angled relative to the longitudinal axis A of the grout nozzle 10.

[0187] In an embodiment, the effectors 56 of the first and second sets are arranged to alternate. The effector 56 of the first set is followed by an effector 56 of the second set An end of at least one of the effectors 56 of the first set is positioned between the effectors 56 of the second set and an end of at least one of the effectors 56 of the second set is positioned between the effectors 56 of the first set.

[0188] The skilled person would appreciate that foregoing embodiments may be modified or combined to obtain the grouting nozzle 10 of the present disclosure.

[0189] Industrial Applicability

[0190] This disclosure describes a grouting nozzle 10 for application of grout into gaps between tiles of shower or kitchen floors. The grouting nozzle 10 can be removably coupled to a grouting extruder 102 for application of grout. Particularly, the grouting nozzle 10 is used with a grouting extruder 102 provided in a grouting machine such as an autonomous grouting robotic apparatus 100. The width of the first and scrapers 30, 32 and consequently the grout nozzle 10 may be adjusted based on thickness of grout lines. The width may also factor in movement that may occur in the axis perpendicular to the grouting direction X to account for any errors.

[0191] Accordingly, this disclosure includes all modifications and equivalents of the subject matter recited in the claims appended hereto as permitted by applicable law. Moreover, any combination of the above-described elements in all possible variations thereof is encompassed by the disclosure unless otherwise indicated herein.

[0192] Where technical features mentioned in any claim are followed by reference signs, the reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, neither the reference signs nor their absence have any limiting effect on the technical features as described above or on the scope of any claim elements.

[0193] One skilled in the art will realise the disclosure may be embodied in other specific forms without departing from the disclosure or essential characteristics thereof The foregoing embodiments are therefore to be considered in all respects illustrative rather than limiting of the disclosure described herein. Scope of the invention is thus indicated by the appended claims, rather than the foregoing description, and all changes that come within the meaning and range of equivalence of the claims are therefore intended to be embraced therein.

Claims

Claims1. A grout nozzle (10) for a grout extruder (102) of an autonomous grouting robotic apparatus (100), the grouting nozzle (10) comprising: a coupling member (12) for coupling to the grout extruder (102), the coupling member (12) having coupling means (16) for engaging the grout extruder (102) and an opening (18) for receiving grout from the grout extruder (102); and a grouting member (14) for applying grout into gaps in an application zone, the grouting member (14) being arranged opposite to the coupling member (12) for passage of grout from the grout extruder (102) to the application zone wherein the grouting member (14) comprises: a grout surface (20); containment means (22) for containing flow of the grout on the grout surface (20), the containment means (22) extending from the grout surface (20) and defining a grout flow zone (24); at least one outlet (26) for egress of the extruded grout, the at least on outlet (26) being provided in the grout surface (20) and being positioned in the grout flow zone (24); and at least one scraper (30) for pushing the egressed grout into gaps in the application zone, the at least one scraper (30) extending from the grout surface (20) and being positioned in the grout flow zone (24) wherein the at least one outlet (26) and the at least one scraper (30) are axially aligned in a first grouting arrangement and the at least one outlet (26) precedes the at least one scraper (30) along a grouting direction (X).

2. The grout nozzle (10) of claim 1 further comprising a second scraper (32) for pushing the grout into gaps in the application zone, the second scraper (32) extending from the grout surface (20) and being positioned in the grout flow zone (24) wherein the second scraper (32) is axially spaced apart from the first grouting arrangement in the grout flow zone (24).

3. The grout nozzle (10) of claim 2 further comprising a second outlet (28) for egress of the extruded grout, the second outlet (28) being provided in the grout surface (20) and being positioned in the grout flow zone (24) wherein the second outlet (28) and the second scraper (32) are axially aligned in a second grouting arrangement and the second outlet (28) precedes the second scraper (32) along a grouting direction (X) wherein a first grouting arrangement is axially spaced apart from the second grouting arrangement.

4. The grout nozzle (10) of claim 3 wherein the coupling member (12) has a second opening (19) for receiving grout from the grout extruder (102), the second opening (19) being axially spaced apart from the first opening (18) wherein the first opening (18) is connected to the first outlet (26) and the second opening (19) is connected to the second outlet (28).

5. The grout nozzle (10) of claim 2, 3 or 4 wherein the second scraper (32) has a perpendicular surface (37) facing the second outlet (28).

6. The grout nozzle (10) of claim 3, 4 or 5 wherein the second scraper (32) is spaced apart from the second outlet (28).

7. The grout nozzle (10) of claim 3, 4, 5 or 6 wherein the grouting member (14) further comprises a flow guide (34) for redirecting residual grout towards the second outlet (28) and / or the second scraper (32), the flow guide (34) extending from the grout surface (20) and being positioned in the grout flow zone (24).

8. The grout nozzle (10) of claim 7 wherein the flow guide (34) comprises a first flange (36) and a second flange (38), each flange (36, 38) being inclined relative to a longitudinal axis (A) of the grout nozzle (10) away from the first outlet (26) and towards the second outlet (28) or the second scraper (32).

9. The grout nozzle (10) of claim 8 wherein the containment means (22) comprisescontainment walls (22) wherein the first flange (36) projects from a first containment wall (22) and the second flange (38) projects from a second containment wall (22) wherein the first containment wall (22) faces the second containment wall (22).

10. The grout nozzle (10) of any one of preceding claims wherein the first scraper (30) is contiguous with the first outlet (26).

11. The grout nozzle (10) of claim any one of preceding claims wherein the first scraper (30) has an inclined face (33) facing the first outlet (26) wherein the direction of inclination is away from the first outlet (26).

12. The grout nozzle (10) of any one of preceding claims wherein the containment means (22) comprise a pair of sidewalls (40, 42) positioned on opposite sides of the first grouting arrangement of the at least one scraper (30) and at least one outlet (26).

13. The grout nozzle (10) of claim 12 wherein an end wall (44) connects the two sidewalls (40, 42) at an end of the grouting surface (20) adjacent the at least one first outlet (26).

14. The grout nozzle (10) of any one of preceding claims further comprising a plurality of first grouting arrangements wherein the plurality of first scrapers (30) and first outlets (26) are axially aligned.

15. The grout nozzle (10) of claim 14 wherein the plurality of first grouting arrangements is mutually spaced apart along the grout surface (20).

16. The grout nozzle (10) of any one of preceding claims wherein a pliable connecting member (50) is interposed between the coupling member (12) and the grouting member (14).

17. The grout nozzle (10) of claim 2 wherein the second scraper (32) has an inclined portion (54) configured to move relative to the grouting surface (20).

18. The grout nozzle (10) of claim any one of preceding claims wherein the coupling means (16) is configured for a sliding engagement with correspondingly configured structure in the grout extruder (102).

19. The grout nozzle (10) of any one of preceding claims wherein the coupling member (12) has an opening at a second end (13) of the grouting nozzle (10) for access to the coupling means (16) and is closed at a first end (11) of the grouting nozzle (10) for limiting sliding engagement of the coupling means (16).

20. The grout nozzle (10) of any one of preceding claims further comprising at least one effector (56) for wiping over a grouted gap wherein the at least one effector (56) is positioned on the grouting member (14) posterior to the containment means (22) along the grouting direction (X) and wherein the at least one effector (56) is inclined relative to grouting direction (X).

21. The grout nozzle (10) of claim 20 comprising a set of two or more effectors (56) wherein the effectors (56) are arranged mutually parallel on the grout surface (20).

22. The grout nozzle (10) of claim 21 comprising a first set of effectors (56) and a second set of effectors (56) wherein the first set of effectors (56) are angled relative to the second set of effectors (56) on the grouting member (14).

23. The grout nozzle (10) of claim 20 or 21 wherein the effector (56) is formed as a flexible foam block.

24. The grout nozzle (10) of claim 20 or 21 wherein the effector (56) is formed as a flexible rubber blade.

25. The grout nozzle (10) of any one of preceding claims further comprising a guide vane (58) for directing grout from the grout extruder (102) into a corresponding opening (18).

26. The grout nozzle (10) of any one of preceding claims 2 to 24 wherein the first scraper (30) and second scraper (32) are formed from a flexible rubber material such that the first scraper (30) and second scraper (32) flex during a grouting operation.

27. An autonomous grouting robotic apparatus (100) comprising a grout nozzle (10) of any one of the preceding claims.

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