EP1340553A2

EP1340553A2 - Jointing device and method

Info

Publication number: EP1340553A2
Application number: EP03003985A
Authority: EP
Inventors: Hans Gustavsson
Original assignee: Hans Gustavsson i Lund AB
Current assignee: Hans Gustavsson i Lund AB
Priority date: 2002-03-01
Filing date: 2003-02-22
Publication date: 2003-09-03
Also published as: SE0200623D0; SE0200623L; EP1340553A3; SE524717C2

Abstract

The invention relates to a jointing device (10) for the application and processing of mortar comprising a dispenser (11) with a barrel (13), a trough (14) arranged in such a way as to allow mortar to be moved from the trough (14) to the barrel (13) with the assistance of gravity, a nozzle (15) and an auger-type conveyor (22) rotationally arranged inside the barrel (13) for feeding of the mortar, which conveyor (22) is designed to allow connection to a motorised machine to drive the conveyor (22) in a rotating motion, wherein the dispenser (11) comprises an elongated hand grip (16) for the operation of the dispenser (11), said hand grip (16) extending generally in a vertical direction from the barrel (13), that the trough (14) is arranged in connection with the hand grip (16). The invention additionally relates to a method for the application and processing of mortar.

Description

FIELD OF THE INVENTION

The invention relates in general to a device and a method for jointing. More specifically the invention relates to a hand-held jointing device and a method for the application and processing of materials with varying inertia and consistency. This type of jointing device is commonly used when applying and processing damp materials, or when tuck pointing by employing such materials. For example, such damp materials for jointing include general sealants and mortar grout. Furthermore this type of jointing device is used when performing repairs to mortar joints or comparable repair work.

PRIOR ART

The traditional method for performing this type of tuck pointing is by manual application by means of manual tools, such as a trowel. The mortar is applied to the area by employing a trowel, which is incredibly time consuming and consequently tuck pointing in this manner is very expensive. An additional negative aspect is the virtual inability of manual tools to provide sufficient filling of the joint.
Jointing devices for this type of tuck pointing process presently exist in the prior art. Existing jointing devices include a motorised machine that is connected to a barrel containing the mortar and an outlet for the mortar. Such a device is described in patent document US 5054658. US 5054658 discloses a jointing device comprising a motorised auger-type conveyor placed in a barrel equipped with a trough and a nozzle. Furthermore, to aid the transfer of mortar from the through to the barrel, the machine is connected to a rod that is arranged in such a way that it vibrates when influenced by the machine.
One disadvantage with prior art jointing devices is the complicated construction and consequent poor cost effectiveness. Thus the complicated construction, which includes a number of components and moving parts, results in costly manufacturing and low reliability. This also causes problems when dismantling and cleaning the jointing device.
A major problem with prior art jointing devices is their bulky nature and the resulting complications with general handling and specifically when performing precision tasks. This may lead to an increased risk of wear and work related damage to an operator of the device.

BRIEF DESCRIPTION OF THE INVENTION

One object of the invention is to negate above mentioned disadvantages and problems of prior art. The jointing device, according to the invention, will allow for one person to perform the application and processing of mortar grout in a prompt, safe and cost effective manner. An additional purpose is to create an ergonomically designed jointing device that an operator may employ in a comfortable position and with a good field of vision. This will result in decreased risk of wear and work related damage. Furthermore the invention provides an improvement on existing products in that it better satisfies the requirements for the precise application and processing of mortar with varying inertial properties. Consequently a well mixed mortar with a relatively loose consistency may be used, which results in a more workable mortar with higher grade of porosity. This also results in a joint with good resistance to frost. When employing a mortar with loose consistency, a particularly good filling of cavities is achieved without mortar spilling out and soiling the application area. An additional purpose of the present invention is to establish a method for jointing and an ergonomically designed mortar dispenser.
The present invention comprises a dispenser that may be connected to a motorised machine, such as a hammer drill. The dispenser comprises an extended barrel, a trough that corresponds with the barrel, a nozzle outlet for the mortar that corresponds with the barrel and an auger-type conveyor that is powered by the motorised machine.
The dispenser may furthermore comprise a hand grip in order to provide precise operation in a comfortable position. The hand grip may be connected to the barrel and the trough. The trough may be connected to the barrel through the hand grip in order to allow mortar to move from the trough to the barrel by means of gravity and by the vibrational effect generated by the hammer drill. The hand grip may comprise an extended cylindrical tube element with slighter dimensions than the trough, thus the hand grip may extend in a generally vertical direction from the cover of the barrel. Consequently the hand grip may be designed in such a way as to provide for storage and transfer on the inside, and at the same time provide hand grip capabilities on the outside. Furthermore the hand grip may act as a safety device by providing distance to the conveyor, and would consequently remove the need for further safety devices in this context. For instance, the trough and the hand grip may be moulded as one piece from an appropriate plastic material, such as nylon.
The conveyor may comprise an extension running through the casing and extending from the barrel as to provide a connection for a rotating and pulsating element, such as a drill chuck, on the hammer drill. The dispenser may furthermore comprise a casing attached to the rear end of the dispenser, as to stabilise and centre the conveyor. The casing may comprise an extension in the shape of a cylindrical tube element, through which the extension can stabilise and centre the conveyor. This is beneficial in that it will, with the aid of the casing, prevent the conveyor from scraping against the inside of the barrel. Thus the barrel may be manufactured from a light and inexpensive material such as plastic, whereas the conveyor may be of steel or comparable.
The hammer drill may be of conventional type and comprise a handle or similar, thus the jointing device may comprise a hand grip on the dispenser and a handle on the hammer drill, as to let an operator, with precision and in a comfortable position, apply mortar onto an application area.
The hammer drill may furthermore be positioned some distance from the casing of the dispenser, or a washer positioned at the extension, to provide for the conveyor to shift slightly along the extension of the barrel. Consequently the hammer drill, in an initial position, where the hammer drill is positioned away from the casing, carries moderate or no vibration force to the dispenser. In this initial position the jointing device will usually vibrate sufficiently, at least partly due to the eccentricity and imbalance inherent in the construction. When the hammer drill shifts in the direction of the casing, and as such is positioned adjacent to the casing or the washer, a powerful vibrational effect is carried to the dispenser as to allow for the regulation of the vibration as deemed appropriate. Consequently a variable vibrational effect is generated. The vibrational effect produces a number of advantages in this context. It will for instance cause a descending motion in the mortar contained in the trough, and consequently more effectively transfer the mortar from the trough to the barrel. Furthermore it provides a positive effect by moving the mortar forward with the assistance of the conveyor. An additional positive effect achieved by the vibrational effect is the increased ability of the mortar to fill out any cavities, and thus allowing the joint to be overfilled with mortar after which a filled or overfilled joint may be worked with traditional brick trowel and jointer in a manual and crafty manner. As a consequence of the vibration in the jointing device, a good mortar adhesion is additionally achieved in the application area.
The dispenser may furthermore comprise a support stand attached to the bottom of the dispenser to allow the dispenser or the jointing device to rest in an upright position on a surface. This is specifically advantageous to an operator refilling the trough with mortar, as it will allow the use of both hands for the refill.
The nozzle corresponding to the dispenser may comprise a centre part made of a flexible material as to reduce the vibrations in the nozzle, or in an exchangeable nozzle valve. Consequently high precision can be achieved during when applying mortar, still when powerful vibration is employed.
An additional advantage with the present invention is the increased pressure generated by the extended design of the hand grip and the trough, in that it facilitates the transfer of sealant, or mortar, from the trough, through the hand grip and to the barrel.
Due to the construction, the jointing device, according to the invention, feeds a relatively small amount of material per time period, and thus owing to eccentricity and imbalance inherent in the construction, the conveyor may rotate at a higher velocity during generation of vibration. This inherent vibration assists in the feed of material and results in improved adhesion of mortar grout applied to a joint. Furthermore, if required the inherent vibration may be supplemented with further moderate or more powerful vibration generated by the hammer function of the hammer drill.
The invention thus relates to a jointing device for the application of mortar, comprising a dispenser with a barrel, a trough arranged in such a way as to allow gravity to transfer mortar from the trough to the barrel, a nozzle and an auger-style conveyor to feed the mortar, which conveyor is designed in such a way as to provide a connection to a motorised machine that will power the conveyor in a rotating movement, recognized by an extended hand grip, extending in a generally vertical direction, for operation of the dispenser and the trough connected to the hand grip. Thus the invention will produce a cost effective, high precision mortar dispenser and/or jointing device that can be employed in an ergonomic manner when applying mortar grout with varying grades of inertia. Furthermore the present invention relates to such a dispenser connected to a hammer drill.
Moreover the invention relates to a method for applying mortar by means of a jointing device comprising a dispenser with a trough arranged at a barrel to transfer mortar from the trough to the barrel by gravitational force, a nozzle and a conveyor rotatably arranged in the barrel to feed the mortar, which conveyor is connected to a motorised machine for operating the conveyor in a rotating movement, characterised in that an extension of the conveyor is connected to a rotating element on a hammer drill forming the jointing device, that the jointing device is brought to an application area by means of a handle on the machine and a hand grip on the dispenser, that a rotating and vibrating movement is produced by means of the hammer drill, wherein the conveyor is rotated and the dispenser is vibrated, that the mortar is transferred by gravity and the vibrational effect from the trough to the barrel, that the mortar is transferred through the dispenser by means of the conveyor and the vibrational effect, and that the mortar is applied to the application area. The vibrational effect, in addition to the vibrational effect generated by the moderate eccentricity and imbalance inherent in the construction, may - optionally be generated by activating the hammer drill.
Further characteristics and advantages with the present invention are made clear by the descriptions and embodiments below, attached drawings and independent patent dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In the following, the invention will now be described in more detail by exemplary embodiments and with reference to the accompanied drawings, of which
Fig. 1 is a schematic side view of a dispenser connected to a machine in a state of operation,
Fig. 2 is a schematic side view of a dispenser in an inactive state,
Fig. 3 is a schematic longitudinal section view of the dispenser according to the invention,
Fig. 4 is a schematic view of the dispenser and of a part of the machine, illustrating the relation between the dispenser and the machine in a first position.
Fig. 5 is a schematic view of the dispenser and part of the machine, illustrating the relation between the dispenser and the machine in a second position,
Fig. 6 is a schematic side view of an auger-type conveyor according to one embodiment of the invention,
Fig. 7 is a schematic side view of a part of the conveyor in reference to Fig. 6,
Fig. 8 is a schematic view of a nozzle according to one embodiment of the invention, and
Fig. 9 is another schematic view of a nozzle according to one alternative embodiment of the invention.

THE INVENTION

With reference to Fig. 1 and Fig. 2, a jointing device 10 comprising a dispenser 11 connected to a motorised machine 12 is illustrated. The dispenser 11 comprises a barrel 13, a trough 14 to hold a buffer of mortar and a nozzle 15. Further, the dispenser 11 comprises a hand grip 16, a casing 17 and a support stand 18. According to one embodiment of the invention the dispenser is substantially manufactured from a light weight material, such as plastic materials, in order to produce a convenient and light weight jointing device 10. For instance, the barrel 13, trough 14, hand grip 16 and the casing 17 are all formed in nylon. According to one embodiment of the invention the barrel 13 is designed in the shape of an extended tube with a substantially cylindrical cross section. The barrel 13 is designed to contain a conveyor, which is described further with reference to Fig 3.
The trough 14 is connected to the barrel 13 through the hand grip 16 to allow mortar to move from the trough 14 to the barrel 13 by means of gravity. Preferably, the hand grip 16 is elongated and extending in a generally vertical direction from an upper side of the barrel 13. Thus, the hand grip 16 is designed to operate the dispenser 11. The hand grip 16 is furthermore designed as a tube element or the similar to provide for mortar to be stored and transferred inside the hand grip while an outside thereof forms a hand grip element. The trough 14 is designed to hold the major part of the mortar buffer while the hand grip 16 is designed to hold a smaller amount of mortar. The hand grip 16 is consequently designed to allow for mortar to be transferred from the trough 14 to the barrel 13 as well as to provide a safety distance to the conveyor, which will consequently remove the need for further safety devices in this context. In the illustrated embodiment the trough 14 is designed with a cross section larger than that of the hand grip 16. Where connected to the hand grip 16, the trough 14 has an appropriate tapering design, or a design with such properties, to assist the transfer of mortar from the trough 14 to the barrel 16. For instance, the trough 14 and/or the hand grip 16 are designed with a generally cylindrical, elliptical or rectangular cross section. For instance, the trough 14 and the hand grip 16 are moulded as one piece. For instance, the trough 14 and/or the hand grip 16 are manufactured from an appropriate plastic material. For instance, the hand grip 16 is attached to the barrel 13 in a conventional manner, such as with a screw 21 or similar.
The nozzle 15 is of an interchangeable type and attached to a front end of the barrel 15. The nozzle 15 is designed to dispense the mortar from the barrel as to allow for the mortar to be applied onto an application area.
The support stand 18 is attached to the barrel 13 in such a way as to allow the dispenser 11 or the jointing device 10 to rest in an upright position on a surface. The stand 18 is in the illustrated embodiment extending in a generally vertical direction from a bottom of the barrel 13, i.e. in an opposite direction to the trough 14. The stand 18 is suitably attached to the front end of the barrel 13. The stand 18 suitably comprises a generally flat element for abutment against a surface. For instance, the stand 18 is designed as a plate with an opening that partially encompasses the barrel 13 to provide for the stand 18 to be pressed onto the barrel 13 and fixed thereto. For instance, the stand 18 is manufactured from a plastic material such as nylon.
The dispenser 11 is arranged connectable to the machine 12 in order to drive an auger-type conveyor of the dispenser 11 in a rotating movement, which is described in more detail in reference to Fig. 4 and Fig. 5. Preferably the machine 12 comprises an electric motor, which preferably is connected to the power mains or battery powered. Furthermore the machine 12 comprises a variable drill chuck 19 or similar, wherein the dispenser 11 can be connected to the machine 12. The machine 12 comprises a handle 20 to allow for easy operation by one person. For instance, the handle 20 is designed as a pistol-grip. The machine 12 suitably comprises vibrational functionality of conventional art to allow the jointing device 10 to vibrate if required during operation. Preferably the machine 12 is designed as a screw driver with vibrating functionality or as a conventional hammer drill.
In reference to Fig 1 and Fig 2 the jointing device 10 is illustrated in a state of operation or in a state of use. The dispenser 11 and the machine 12 are arranged substantially horizontally and in line to allow for the dispenser 11 and the machine 12 to be connected along a common axis. In Fig. 1 the handle 20 of the machine 12 is extending in a generally vertical direction to allow an operator to hold the handle 20 and the hand grip 16 of the dispenser 11, and move the jointing device to the application area for the application of mortar. However, the machine 12 is rotatably arranged around the axis so that the handle 20 can be gripped in optional position according to the present application.
In reference to Fig. 2 the jointing device 10 is illustrated in an inactive state or in a state when the jointing device 10 is not in use. During the inactive state the stand 18 is arranged against a surface to keep the dispenser 11 in an upright position. The machine 12 is arranged in such a way as to allow the handle 20 to extend horizontally and contact the surface for additional stability. Thus an operator may put the jointing device 10 or the dispenser 11 down, wherein the trough 14 extends vertically from the barrel 13 to allow filling of mortar.
In reference to Fig. 3, a schematic longitudinal section view of the dispenser 11 is illustrated according to the invention. The dispenser 11 comprises, in addition to the horizontally arranged barrel 13, the hand grip 16 extending vertically from the barrel 13, the trough 14 connected to the hand grip 16, the nozzle 15, the casing 17 and the stand 18, moreover an auger-type conveyor 22 to transfer mortar through the barrel 13 and through the nozzle 15. The conveyor 22 is of an extended shape and is designed to rotate inside the barrel 12. The conveyor 12 is equipped with a helical flute 23 and an extension 24 that runs through an opening in the rear end of the barrel 13 and continues through the casing 17, wherein the extension 24 protrudes from the casing 17 to allow a connection to the chuck 19 of the machine 12. According to one embodiment of the invention the extension 24 is designed with a generally circular cross section. Additionally the extension 24 is positioned along the centre line. The extension 24 is designed to attach to the machine 12 in such a way as to allow the machine 12 to drive the extension in a rotating movement around the centre line, and consequently cause the conveyor 22 to move in a corresponding manner. The conveyor 22 is arranged horizontally in the barrel 13 so that the conveyor 22 can rotate around a centre line of the barrel 13. The conveyor 22 is attached and centred in the barrel 13 with the assistance of the casing 17. Furthermore the conveyor 22 is attached to the barrel by means of a washer 25. The washer 25 is arranged displaceable on the conveyor and in the barrel 13 in order to prevent the conveyor 22 to shift in the direction towards the machine 12 when the washer 25 is in contact with the casing 17 and the flute 23 is in contact with the washer 25. For instance, the washer 25 is loosely fitted to the conveyor 22.
The casing 17 is removably arranged at the rear portion of the conveyor 13 in such a way as to allow the conveyor 22 to be removed from the barrel 13 when required, such as for cleaning. The casing 17 comprises an extended part that extends from the rear end of the barrel 13, which extended part partly encompasses a portion of the extension 24 to allow centering and stabilising of the conveyor 22 within the barrel 13.
According to one embodiment of the invention a conveyor extension 26, or helical spring, is arranged in the front portion of the conveyor 22. The conveyor extension 26 is arranged horizontally along the centre line. The conveyor extension 26 is connected to the conveyor 22 in a conventional manner. The conveyor extension 26 is preferably positioned to extend into the nozzle 15 as to facilitate the movement of mortar through the nozzle 15. The conveyor extension 26 is attached to the conveyor 22 in such a way as to rotate when the conveyor 22 rotates.
In the wider upper part of the trough 14 a first opening for the filling of mortar is arranged. A tapered part of the lower half of the trough 14 additionally comprises a second opening that is connected to the hand grip 16 to allow mortar to move from the trough 14, through the hand grip 16 and to the barrel 13 with the assistance of gravity and the vibrational effect generated by the machine 12. The vibrational effect moreover includes the vibrational effect generated by the moderate eccentricity and imbalance inherent in the construction. For instance, the trough 14 is generally arranged in a vertical direction on the barrel 13 and at least partially tapered. The trough 14 may be equipped with a cover in the wider top half of the trough 14 as to prevent spilling of mortar. Such a cover may be conventionally designed and is not illustrated nor further described herein.
For instance, the nozzle 15 is designed as to provide a horizontal extension of the barrel 13, through which the mortar can be forced in a forward motion through the barrel 13 with the assistance of the conveyor 22 and finally out through the nozzle through a third aperture corresponding to the nozzle 15. The nozzle 15 is generally designed with a slighter cross section than the barrel 13 and preferably allows for rotation. Furthermore the nozzle 15 is of an interchangeable type as to allow for a range of nozzles 15 to be attached to the barrel 13. The nozzle 15 is, for instance, designed with a generally circular, elliptical or rectangular interior cross section as to force the mortar to take on the corresponding profile when leaving the third opening.
In the illustrated embodiment the barrel 13 comprises an extended part 35 extending in the direction of the hand grip 16, wherein a part of the hand grip 16 encompasses the extending part 35, fixing the hand grip 16 to the barrel 13. The extending part 35 of the barrel 13 is designed as a tube element as to allow for mortar to move from the trough 14, through the hand grip 16 and to continue through the extending part 35 of the barrel to the barrel 16.
In reference to Fig. 4 and Fig. 5 a longitudinal section view of a part of the dispenser 11 and a part of the machine 12 is illustrated. The barrel 13 and the casing 17, as illustrated in the embodiments of Fig. 4 and Fig. 5, are equipped with a number of threads 27 to allow the casing 17 to twist onto the rear end of the barrel 13. Consequently the dispenser can with ease be dismantled for cleaning or other purpose.
Fig. 4 illustrates the relation between the dispenser 11 and the machine 12 in a first position for moderate vibration effect through the machine 12. As illustrated in the embodiment of Fig. 4, the chuck 19 of the machine 12 encompasses a part of the extension 24 forming a space between the dispenser 11, or the casing 17, and the chuck 19, wherein the vibrational effect of the machine 12 generally is transmitted to the conveyor 22 and a less extensive vibrational effect is generated. In the event of the hammer function of the machine 12 being inactive, due to the eccentricity and imbalance inherent in the construction of the dispenser 11 some vibrational effect is generated in the jointing device 10 when the conveyor 22 is rotated. For instance, the chuck 19 is arranged with a distance to the casing 17, as illustrated in Fig. 4 and referenced by the arrow A. A spacer washer 28 may, if required, be connected to the extension 24 for the regulating of the distance A. A plurality of spacer washers 28 may be connected to regulate the distance A.
In reference also to Fig. 5 the relation between the dispenser 11 and the machine 12 in a second position for strong vibrational effect through the machine 12 is illustrated. In the embodiment of Fig. 5 the chuck 19 of the machine 12 is pressed against the dispenser 11, wherein vibrational effect generated by the machine 12 is transmitted throughout the dispenser 11 to produce a powerful vibration. The chuck 19, for instance, is in contact with the spacer washer 28 or the casing 17. Consequently the conveyor 22 shifts in the direction of the front end of the barrel 13 and the nozzle 15. Preferably the conveyor 22 is designed to comprise a length that will prevent the conveyor 22 from coming into contact with the front end of the barrel 13 or the nozzle 15 when the conveyor 22 is in a forward state. Additionally it is possible to generate moderate to strong vibrational effect by gently moving the chuck 19 of the machine 12 to the dispenser 17. Such a working position generates a beneficial downward vibration and effective transfer of the mortar, without strong vibrations being transferred to an operator of the jointing device 10.
In reference to Fig. 6 a schematic view of the conveyor 22 is illustrated according to one embodiment of the invention. Fig. 6 illustrates in more detail the flute 23, extension 24 and washer 25 of the conveyor 22. The flute 23 extends a number of turns around a front end part of an extended cylinder 29 or similar, which front end is designed to be contained within the barrel 13. For example the flute 23 extends approximately four turns around the cylinder 29 from the front end along approximately half the length of the cylinder 29. For instance, the flute 23 is attached to the cylinder 29 by a weld joint. For instance, the weld joint is arranged at a front end of the cylinder 29 and a front end of the conveyor 22.
The washer 25 may be shifted along the cylinder 29 and provides protection for the casing 17 in that it prevents the conveyor 22 from shifting back when the washer 25 is adjoined to the casing 17 and the flute 23 adjoins the washer 25.
Thus, the extension 24 makes up the rear end of the cylinder 29. The extension 24 makes up approximately half of the total cylinder 29 length.
In reference to Fig. 7 a schematic view of a part of the conveyor 22 is illustrated. Fig. 7 illustrates in more detail the flute 23 corresponding to the conveyor 22. The flute 23 comprises, for instance, a helical shaped sheet attached around a periphery in the cylinder 29. The flute 23 extends, for instance, approximately four turns around the front end of the cylinder 29. The flute 23, according to the invention, is designed to provide an even pitch to the conveyor 22, which is illustrated in Fig. 7 with the use of reference characters B, C, D and E. The distance B thus equals the distance C; the distance C equals distance D and distance D equals distance E. Furthermore the conveyor 13 is designed to correspondingly provide an even pitch to the conveyor 22. The conveyor 22 may however be designed differently, which for the man skilled in the art would be obvious guided by the scope of the invention. The conveyor 22 is manufactured from a metallic material such as steel, or other appropriate material.
In reference to Fig. 8 and Fig. 9 a schematic view from above of the nozzle 15 according to the invention is illustrated. The nozzle 15 is designed with a smaller cross section than the barrel 13. The nozzle 15 comprises a tapered part 30 connected to the barrel 13. As an alternative the tapered part 30 is integrated with the barrel 13. The tapered part 30 is designed to facilitate transfer of mortar from the barrel 13 to the nozzle 15. Additionally the nozzle 15 comprises an extended element 31 extending from the tapered part 30. The extended element 31 may comprise a cylindrical design to allow transfer of mortar from the barrel 13. As an alternative the extended element 31 may be integrated with the barrel 13. Onto the extended element 31 is arranged a centre part 32 made of a flexible material as to reduce the vibrations in the nozzle 15 to allow high precision application of mortar even when employing strong vibrational effect. The centre part 32 may comprise a conventional hose element, which is fixed to the extended element 31. Preferably the centre part is designed to slide onto the extended element 31. The nozzle 15 additionally comprises a releasable nozzle profile 33 to allow passage of mortar. The nozzle profile 33 may be of an elliptical design. The nozzle profile 33 may however be designed differently, which for the man skilled in the art would be obvious. Fig. 8 illustrates the nozzle profile 33 extending horizontally a short distance from the centre part 32. The nozzle profile 33 and the barrel 13 are additionally arranged along a common axis, or along the centre line. The nozzle profile 33 is fixed to the centre part 32 with use of a conventional fastener 34, such as a clamp or similar.
In reference to Fig. 9 the nozzle profile 33 is designed to facilitate the application of mortar in areas hard to reach, thus the nozzle profile 32 is extended and of a slightly bent shape. According to the invention the conveyor extension 26 extends to a front end of the nozzle profile 33 to facilitate transfer of material. Additionally the nozzle 15 may be designed differently, which for the man skilled in the art would be obvious.

Claims

A jointing device (10) for the application of mortar, comprising a dispenser (11) with a barrel (13), a trough (14) arranged in such a way that the mortar can be transferred from the trough (14) to the barrel (13) with the assistance of gravity, a nozzle (15) and an auger-type conveyor (22) rotationally arranged inside the barrel (13) for feeding of the mortar, which conveyor (22) is designed to allow connection to a motorised machine to drive the conveyor (22) in a rotating motion, characterised by
that the dispenser (11) comprises an elongated hand grip (16) for the operation of the dispenser (11), said hand grip (16) extending generally in a vertical direction from the barrel (13), and
that the trough (14) is arranged in connection with the hand grip (16).
A jointing device according to claim 1, wherein which the hand grip (16) is formed like a tube element to transfer mortar from the trough (14) to the barrel (13).
A jointing device according to claim 2, wherein the hand grip (16) has a cross section area lesser than a cross section area of the trough (14).
A jointing device according to claim 1, wherein the barrel (13), the hand grip (16) and/or the trough (14) are manufactured from a plastic material to produce a convenient and light weight jointing device.
A jointing device according to claim 1, wherein the conveyor (22) comprises an extension (24) as to allow connection to a hammer drill.
A jointing device according to claim 1, wherein the dispenser (11) comprises a casing (17) to stabilise and centre the conveyor (22).
A jointing device according to claim 1, wherein the dispenser (11) comprises a stand (18).
A jointing device according to claim 1, wherein the dispenser (11) is connected to a hammer drill (12) designed to generate a vibrational motion and thus allow the vibrational effect to transfer to the dispenser (11) as to facilitate the movement of mortar from the trough (14) to the barrel (13), the movement of mortar through the dispenser (11) and the application of mortar onto a mortar joint.
A jointing device according to claim 8, wherein the dispenser (11) is horizontally arranged in line with the hammer drill (12) thus providing a jointing device (10) comprising a hand grip (16) and a handle (20).
A jointing device according to claim 8, wherein the conveyor (22) is displaceable arranged within the barrel (13) in such a way that the hammer drill (12) in a first position will transfer no or moderate vibrational effect to the dispenser (11) and in a second position, when abutting the dispenser (11), will transfer strong vibrational effect to the dispenser (11).
A method for application of mortar with a jointing device comprising a dispenser (11) with a trough (14) arranged at a barrel (13) in such a way that the mortar can be transferred from the trough (14) to the barrel (13) with the assistance of gravity, a nozzle (15) and an auger-type conveyor (22) rotationally arranged inside the barrel (13) for feeding of the mortar, which conveyor (22) is connected to a motorised machine (12) to drive the conveyor (22) in a rotating motion, characterised by

that an extension (24) of the conveyor (22) is connected to a rotating element on the machine (12), thus forming the jointing device (10),

that the jointing device (10) is moved towards an application area with the assistance of a handle (20) on the machine (12) and a hand grip (16) on the dispenser (11),

that the machine (12) is made to produce a rotating and vibrating motion, thus causing the conveyor (22) to rotate and the dispenser (11) to vibrate,

that the mortar is transferred from the through (14) to the barrel (13) with assistance of gravity and the vibrating motion,

that the mortar is transferred through the dispenser (11) with the assistance of the conveyor (22) and the vibrating motion, and

that the mortar is applied onto the application area.
A jointing device (10) for the application of mortar, comprising a dispenser (11) with a trough (14) arranged at a barrel (13) in such that the mortar can be moved from the trough (14) to the barrel (13) with the assistance of gravity, a nozzle (15) and an auger-type conveyor (22) rotationally arranged inside the barrel (13) for feeding of the mortar, which conveyor (22) is connected to a motorised machine to drive the conveyor (22) in a rotating motion, characterised by

that the dispenser (11) comprises an elongated hand grip (16) for the operation of the dispenser (11), said hand grip (16) extending substantially in a vertical direction from the barrel (13),

that the trough (14) attached to the hand grip (16),

that the machine is a hammer drill (12) arranged with a handle (20) designed to generate a vibrating motion,

that a rotating element on the hammer drill (12) connected to an extension (24) on the conveyor (22) to allow the vibrating motion to transfer to the conveyor (22) and the dispenser (11) as to facilitate the movement of mortar from the trough (14) to the barrel (13), to facilitate transfer of mortar through the dispenser (11) and to achieve sealing of a mortar in a joint.