WO2022188977A1

WO2022188977A1 - Throwing object with fastener strips

Info

Publication number: WO2022188977A1
Application number: PCT/EP2021/056174
Authority: WO
Inventors: Axel VON HELAND
Original assignee: Waboba Ab
Priority date: 2021-03-11
Filing date: 2021-03-11
Publication date: 2022-09-15

Abstract

A throwing object comprises a hollow body (14) and at least one strip (22, 24, 26) providing at least two contact areas configured to releasably attach to an external attaching surface (34), where the hollow body (14) has a front edge (16) on which said contact areas are provided, the front edge encircling an axis A defined through a hollow interior of the hollow body (14) and each fastener strip (22, 24, 26) stretching in a first direction along an exterior surface of the hollow body (14) towards the front edge (16), curve around the front edge (16) and stretch back in a second direction along an interior surface of the hollow body (14).

Description

THROWING OBJECT WITH FASTENER STRIPS TECHNICAL FIELD

The invention relates to a throwing object comprising a hollow body and at least one fastener strip. BACKGROUND

Throwing objects such as Frisbees™ are popular to use for recreational purposes.

However, also other types of throwing objects have become of interest for such recreational purposes. One throwing object is the Gyroscopic flying device, which is disclosed in US 5816880 and US 6048245.

This device, which is provided in the form of a ring, has also been used as a first element of a throwing object that is joined to a second element, where the second element is a plastic cloth. In this case the first element forms a front and the second element forms a tail of the throwing object. Such a device is disclosed in US 5810637.

It could be of interest to allow a throwing object of the above-described latter types to be thrown at and attach to a surface. This could be of interest if for instance using the object in a dart like game. It could also be of interest if for instance using the throwing object together with a handheld catching board, similar to the catching of baseballs with a baseball glove. The object should thus be able to stick to the surface. This may not be so easy to implement, especially if the influence on the ability of the object to fly in the air should at the same time be as limited as possible.

SUMMARY The present invention addresses the problem of providing an improved throwing object that can attach to a corresponding surface while at the same time retaining good flight properties. This is according to a first aspect achieved through a throwing object comprising a hollow body and a at least one fastener strip having at least two contact areas configured to releasably attach to an external attaching surface, wherein the hollow body has a front edge on which said contact areas are provided, the front edge encircling an axis defined through a hollow interior of the hollow body and each fastener strip stretching in a first direction along an exterior surface of the hollow body towards the front edge, curving around the front edge for forming a contact area and stretching back in a second direction along an interior surface of the hollow body. Thereby the strips are attachable to and detachable from the external surface.

The at least one fastener strip fastening may have first side facing away from the front element and a second side facing the front element, where it is possible that the attaching areas are provided on the first side.

The object may comprise a group of strips comprising at least two strips, each providing at least one contact area. The hollow body may be cylinder-shaped with the axis being the cylinder axis.

The first and second directions may both be parallel with the cylinder axis. As an alternative, the first direction on the interior surface may be provided at an angle to the cylinder axis, such as forty-five degrees, and the second direction on the exterior surface may be provided at an angle to the first direction, such as ninety degrees.

The contact areas may be evenly distributed on the front edge and the number of contact areas maybe in the range 2 - 12.

The at least one fastener strip may have a first thickness Ti and the front element may have a second thickness T2 at the front edge. The first thickness Ti may be equal to or higher than 0.5 mm. It may with advantage be 1.5 mm. The second thickness T2 maybe in the range 1-5 - 2.4 mm and with advantage 1.95 mm. The first thickness Ti may additionally be lower than two times the second thickness T2. The first thickness Ti may additionally be lower than the second thickness T2.

Each fastener strip may additionally have a length in the interval 34 - 46 mm and with advantage a length of 40 mm. A fastener strip may stretch 10 - 14 mm in the first direction along the exterior surface and with advantage 12 mm along the exterior surface. A fastener strip may also stretch 22 - 30 mm in the second direction along the interior surface and with advantage 26 mm along the interior surface. It is additionally possible that 25 - 35% of the fastener strip and with advantage 30% of the fastener strip is placed on the exterior surface, while 60 - 70 % of the fastener strip and with advantage 65% percent is placed on the interior surface, with the remainder of the fastener strip proving at least one contact area.

The exterior surface of the hollow body may have a diameter D at the front edge, which diameter D may be in the range 64 - 102 mm and may with advantage be 69.4 mm. Each strip may have a width, which strip width may be in the range 6 - 14 mm and with advantage 10 mm. The diameter D may additionally be 4.6 - 13.7 times higher than the strip width and may with advantage be 6.9 times higher.

The hollow body may additionally comprise holes in the exterior surface, through which holes the fastener strips may run for allowing each fastener strip to run from inside the hollow body, through a corresponding hole, in the first direction along the exterior surface, around the front edge and back a distance in the second direction along the interior surface of the front element. Each fastener strip may additionally comprise fastening means for attaching to receiving means of the external attaching surface. The fastening means may in this case be provided on the first side of the strip. The fastening means may comprise hooks and the receiving means may comprise corresponding loops or vice versa. The hollow body may be plastic, such as polyethylene PE or Polyvinylchloride PVC. The hollow body may additionally be an elastomer, such as silicone, rubber, a thermoplastic elastomer or a thermoplastic rubber such as TPU. It may additionally have a shore A hardness in the range 90 - 100 and preferably of 95.

The at least one fastener strip may likewise be plastic, such as being made of vinyl or nylon.

In one advantageous variation the hollow body is a TPU body and the at least one fastener strip is a nylon strip. It is furthermore possible that the hollow body is a hollow front element and that the throwing object further comprises a hollow tail element attached to the front element.

The front element may for this reason comprise a first and a second cylinder shaped section, where the first section has a larger radius than the second section and is folded over the second section at the front edge between the sections, the first section having a third thickness T3 and stretching a first distance di in an axial direction away from the front edge and the second section having a fourth thickness T4 at the front edge and the tail element being inserted and held between the first and second sections. The first distance di may be in the range 17 - 25 mm and with advantage 21 mm. The second distance d2 may in turn be in the range 13 - 17 and with advantage 14.7 mm.

The third thickness T3 maybe in the range 0.5 - 0.9 mm and with advantage 0.7 mm. The fourth thickness T4 may be in the range 1.0 - 1.5 and with advantage 1.25 mm. The fourth thickness T4 may be higher than the third thickness T3. It may with advantage be 1.1 - 3 times higher and preferably 1.8 times higher than the third thickness T3.

The thickness of the second section may additionally be variable and increase continuously in the axial direction away from the edge until a point of maximum thickness MT and thereafter decrease continuously, thereby defining a bulge placed at a second distance d2 from the edge. The maximum thickness maybe in the range 2.0 - 2.3 and with advantage 2.15 mm. The maximum thickness may additionally be in the range 4/3 - 2.3 times thicker and with advantage 1.72 times thicker than the fourth thickness T4 at the edge. The maximum thickness may additionally be in the range 2.2 - 4.6 and with advantage 3.9 times the third thickness T3.

The first distance di may be in the range 1 - 1.9 times longer than the second distance d2 and with advantage 1.4 times longer. The diameter of the second section at the edge may be in the range 63 - 100 mm and may with advantage be 68 mm. The diameter of the second section at the edge may additionally be in the range 3.8 - 6.2 and preferably 4.7 times higher than the second distance d2. It may additionally be in the range 28 - 40 and with advantage 32 times higher than the maximum thickness MT of the second section. The diameter of the second section at the edge may furthermore be in the range 1.5 - 2.7 and preferably 1.9 times higher than the sum of the first and second distances di and d2.

It is additionally possible that the sum of the maximum thickness MT of the second section and the third thickness T3 of the first section is 1.16 - 2.13 and with advantage 1.46 times higher than the sum of the third and fourth thicknesses T3, and T4.

The front element may additionally comprise a third section joined to the second section, where this joining maybe made via an optional cut. The third section may have a fifth thickness T5 that may be essentially the same as the third thickness T3 and the third section may stretch a third distance d3 away from the second section in the axial direction. The third distance d3 may be in the range 20 - 25 and with advantage 22.7 mm.

The sum of the maximum thickness MT of the second section and the third thickness T3 of the first section maybe 3.1 - 4.5 and preferably 3.9 times higher than the fifth thickness T5. The sum of the third and fourth thicknesses T3 and T4 maybe 1.9 - 3.6 and preferably 2.7 times higher than the fifth thickness T5.

A first expression may be 1.5 - 5 and preferably 2.6 times higher than a second expression, where the first expression may comprise the first distance di subtracted from a sum of the second and third distances d2 and d3 and the second expression may comprise the second distance d2 subtracted from the first distance di.

The tail element may be a cloth made of a natural or synthetic fibre, where cotton and silk are examples of natural fibres and nylon and polyester. The invention has a number of advantages. It provides a throwing object that is capable of gliding in the air with excellent aerodynamic properties at the same time as it can be thrown on and attach to a surface.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the element, apparatus, component, means, step, etc." are to be interpreted openly as referring to at least one instance of the element, apparatus, component, means, step, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated. BRIEF DESCRIPTION OF THE DRAWINGS

The invention is now described, by way of example, with reference to the accompanying drawings, in which:

Fig 1 shows a front view of a throwing object comprising a hollow front element and a hollow tail element and equipped with fastener strips, Fig. 2 shows a first perspective view of the bottom of the throwing object,

Fig. 3 shows a view from below of the throwing object,

Fig. 4 shows a second perspective view of the bottom of the throwing object without fastener strips, Fig. 5 shows a fourth perspective view of half the hollow front element, without strips and holes, and

Fig. 6 shows a second perspective view of the hollow front element half also without strips and holes. DETAILED DESCRIPTION

The invention will now be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like numbers refer to like elements throughout the description.

Fig l schematically shows a front view of a throwing object io comprising a hollow front element and a hollow tail element and equipped with fastener strips, fig. 2 shows a first perspective view of the bottom of the throwing object, fig. 3 shows a view from below of the throwing object and fig. 4 shows a second perspective view of the bottom of the throwing object without fastener strips. As can be seen in fig. 1 - 4, the throwing object 10 comprises a first and a second hollow element 12 and 14, where the first element is a hollow body that in this case is also a hollow front element 14 and the second element is a hollow tail element 12 attached to the hollow front element 14. The body or front element 14 maybe ring-shaped, i.e. annular, or cylindrical. It may thus be cylinder-shaped. Thereby it has an interior surface 18 and an exterior surface 20. It also has a front edge 16 between the interior and exterior surfaces 18 and 20, which front edge 16 is opposite to a rear end of the front element 14 from which the tail element 12 extends.

The front element 14 may be made of a material that is an elastomer, such as silicone, rubber, a thermoplastic elastomer or a thermoplastic rubber such as thermoplastic polyurethane (TPU). The material may additionally have a shore A hardness in the range 90 - 100 and preferably of 95. A silicone front element may be preferred.

The tail 12 may in turn be made of a cloth, which cloth may be made of natural fibres such as cotton or silk or synthetic fibres such as nylon or polyester, where nylon may be preferred.

The throwing object 10 is supposed to be thrown by a user and when being thrown, it is intended to glide in the air and therefore the tail 12 is attached to the front element 14. The throwing object 10 is more particularly supposed to be thrown at and attach to an external attaching surface 34, for instance realized as a board, where an external attaching surface is a surface that is external to the throwing object 10. The attaching surface 34 is thus no part of the throwing object 10. For this reason, the throwing object 10 is provided with at least one fastener strip providing at least two contact areas Ai, A2, A3, A4, A5 and A6 configured to releasably attach to the external attaching surface 34. The contact areas are thus designed to releasably attach to the external attaching surface 34. Moreover, the contact areas Ai, A2, A3, A4, A5 and A6 are provided on the front edge 16 of the front element 14. In the present example there is more than one fastener strip. There is a group of fastener strips 22, 24, 26, 28, 30 and 32 comprising at least two strips, where each strip provides at least one contact area on the front edge. The contact areas can thus attach to the external attaching surface 34 and a user may then detach them from the external attaching surface 34 in order to throw the object 10 again. Thereby the strips 22, 24, 26, 28, 30 and 32 are attachable to and detachable from the surface 34. The strips 22, 24, 26, 28, 30 and 32 are provided in the front element 14 and as an example, each strip 22, 24, 26, 28, 30 and 32 may pass through a corresponding hole 36, 38 and 39 provided in the exterior surface 20 of the front element 14. Thereby each fastener strip 22, 24, 26, 28, 30 and 32 may run from inside the front element 14, i.e. from between the interior and exterior surfaces 18 and 20 through a corresponding hole 36, 38 and 39, stretch along the exterior surface 20 in a first direction, curve around the front edge 16 and stretch in a second direction along the interior surface 18. The strips may additionally attach to the front element such as using glue or through stitching. The front element may also be provided without holes.

A fastener strip may have a first and a second side, where the second side faces the front element and the first side faces away from the front element. It can also be seen that such a strip 22, 24, 26, 28, 30 and 32 has a first thickness Ti and a width W, where the first thickness Ti may be higher than or equal to 0.5 mm and with advantage 1.5 mm, while the width W may be in the range 6 - 14 mm and with advantage 10 mm. The front edge 16 of the front element 14 in turn has a second thickness T2 and an outer diameter D at the front edge 16. The second thickness T2 maybe in the range 1.5 - 2.4 mm and with advantage 1.95 mm, while the outer diameter D may be in the range 64 - 1022 mm and with advantage 69.4 mm. The first thickness T12 may additionally be lower than two times the second thickness T2. The first thickness Ti may with advantage be lower than the second thickness T2

As can be understood from fig. 1 - 4, a fastener strip may stretch in the first direction from a hole along the exterior surface 20 and to the front edge 16, is then curved around the front edge 16 and then stretches back a distance in the second direction along the interior surface 18. A fastener strip may additionally have a length in the interval 34 - 46 mm and with advantage a length of 40 mm. A fastener strip may then stretch 10 - 14 mm in the first direction along the exterior surface and with advantage 12 mm along the exterior surface. A fastener strip may also stretch 22 - 30 mm in the second direction along the interior surface and with advantage 26 mm along the interior surface. It is additionally possible that 25 - 35% of the fastener strip and with advantage 30% of the fastener strip is placed on the exterior surface, while 60 - 70 % of the fastener strip and with advantage 65% percent is placed on the interior surface, with the remainder of the fastener strip proving a contact area. It can thereby be seen that the front edge 16 encircles an axis A defined through the hollow interior of the front element 14 and the fastener strips 22, 24, 26, 28, 30 and 32 stretch in the first direction along the exterior surface 20 towards the front edge 16, curve around the front edge 16 and then stretch back in the second direction along the interior surface 18. In the example in fig. 1 the second direction is opposite to the first direction. It can more particularly be seen that as the front element 14 is cylinder-shaped with the longitudinal axis A being the cylinder axis, the first and second directions of the strips 22 are in this case both parallel to the cylinder axis A. The contact areas Ai, A2, A3, A4, A5 and A6, and in this case also the fastener strips 22, 24, 26, 28, 30 and 32, are evenly distributed on the front edge 16 around the axis A. The contact areas Ai, A2, A3 and A4 are thus evenly spaced around the axis at a radial distance that is essentially half the diameter D. The outer diameter D of the front element 14 at the front edge 16, i.e. the diameter of the exterior surface 20 of the front element 14 in the vicinity of the front edge 16, maybe 4.6 - 13.7 times higher than the strip width W, and with advantage 6.9 times higher.

With such a realization the object 10 can be thrown at and attach to the external attachment surface 34. It is for instance possible to play dart- or catch-like games using a board that may be hand-held or even to throw the object against a wall. The contact areas Ai, A2, A3, A4, A5 and A6 of the strips 22, 24, 26, 28, 30 and 32 will then attach to this surface 34. The above- described realizations of the strips 22, 24, 26, 28, 30 and 32, the relationships of their properties to the properties of the front element 14 and their distribution also ensure a good attachment capability while at the same time having a minimal influence on the ability to fly in the air, such as aerodynamical properties and centre of gravity. The negative effect on this ability is considerably less severe compared with a strip that is placed radially around the whole front edge 16. The throwing object is also easier to assemble. There are several ways in which a fastener strip may be realized. A fastener strip may as an example be realized using fastening means for attaching to receiving means of the attaching surface. Such fastening means may be provided on the first side of the fastener strip. It may additionally only be provided on the first side. It is additionally possible that the fastening means is only provided in or in and around the contact areas. The fastening means may comprise hooks and the receiving means may comprise corresponding loops or vice versa, for instance using Velcro™. It is as an alternatively possible to use magnetism or even an adhesive. The fastener strips may additionally be soft and made of a plastic material such as nylon or vinyl, where the attachment surface may be made of the same material.

The number of strips may with advantage vary between two and twelve, where six are used in the given example. As can be seen in fig. l, the throwing object can be realized using a front and a tail element. In order to enable a fastening of the tail element to the front element, the structure shown in fig. 5 and 6 may be used, which figures both show perspective views of the front element 14 that has been cut in half. In these figures the holes and strips have been left out.

As can be seen the front element 14 may comprise a first, second and third section 42, 44 and 46, where each section has a cylinder shape and therefore each section has a diameter, where the diameter of the first section 42 at the front edge 16 is shown in fig. 6 and is also the outer diameter D of the front element 14 at the edge 16. The first section 42 is additionally folded over the second section 44 at the front edge 16. Moreover, the first section 42 has a larger diameter than the second section 44. The third section 46 is in turn joined to second section 44 via a cut 40. Thereby a longitudinal axis is defined through the centre of the front element 14, which axis is the previously mentioned cylinder axis A, and the sections 42, 44 and 46 are centred around this axis A. Furthermore, the first section 42 is also concentric with the second section 44 and placed radially outside of the second section 44. It can thereby also be seen that the front element 14 has a circular cross-section. The inner surface of the second section 44 in this case forms a part of the interior surface 18 of the front element 14 and the exterior surface of the first section 42 forms a part of the exterior surface 20 of the front element 14. The inner surface of the third section 46 also contributes to the interior surface 18 of the front element 14 and the outer source of the third section 46 contributes to the exterior surface 20 of the front section i4.The first section 42 has a third thickness T3 and stretches a first distance di in the axial direction away from the front edge 16. The second section 44 in turn has a fourth thickness T4 at the front edge 16. Thereby the second thickness T2 is the sum of the third and the fourth thicknesses T3 and T4. There is also a second distance d2 associated with the second section 44. The third section 46 has a fifth thickness T5 that is essentially the same as the third thickness T3. The third section 46 also stretches a third distance d3 away from the second section 44 in the axial direction. Through this realization of the first and second sections 42 and 44, a slot S is defined between them and this slot S is configured to receive and hold the tail 12. When the throwing object 10 is assembled, the tail 12 may thus be inserted and held in the slot S between the first and second sections 42 and 44 of the front element 14. It is thereby also realized that a first end of a strip may be fastened between the first and second sections of the front element, exit a hole, stretch along the exterior surface formed by the first section, turn around the front edge and then stretch a distance along the interior surface formed by the second section and possibly also the third section. The thickness of the second section 44 may be variable and increase in the axial direction away from the front edge 16 until a point of maximum thickness MT. Thereafter the thickness of the second section 44 may decrease until the section 44 is joined to the third section 46 via the slot 40. This thickness variation is only observable in the interior of the front element 14, i.e. on a surface facing the axis A, but not on a surface facing the first section 42. This means that the outer diameter of the second section 44 maybe fixed, while an inner diameter of the second section 44 changes along the axis from the front edge 16 towards the third section 46. More particularly, the inner diameter of the second section 44 decreases from the front edge 16 towards the point of maximum thickness MT and then increases from the point of maximum thickness MT towards the slot 40. The slope of the increase may be smaller than the slope of the decrease. The increase and decrease may be a linear increase and decrease. Therefore, the absolute value of the derivate of the diameter decrease may be smaller than the absolute value of the diameter increase. The point of maximum thickness MT may be provided at the second distance d2 from the front edge 16. The third section 46 may in turn stretch a third distance d3 along the axis A away from the second section 44.

Through the change of thickness there is a bulge 48 defined at the point of maximum thickness MT. The bulge is thereby placed on the second distance d2 along the axis A in a direction away from the front edge 16. This bulge 48 has the advantage of allowing a thin throwing object to be made that retains its shape when in use while at the same time also retaining its aerodynamic properties.

The distance of this bulge 48 from the front edge can be varied. However typically the bulge is placed at an upper end of the second section adjacent the third section, i.e. essentially as far away from the front edge as possible.

The first distance di is typically in the range 17 - 25 mm and with advantage 21 mm. The second distance d2 is typically in the range 13 - 17 mm and with advantage 14.7 mm. The third thickness T3 is typically 0.5 - 0.9 mm and with advantage 0.7 mm. The thickness of the second section 44 at the front edge

16, i.e. the fourth thickness T4, is typically in the range 1.0 - 1.5 and with advantage 1.25 mm. The maximum thickness MT of the second section 44 at the bulge 48 is in turn typically in the range 2.0 - 2.3 mm and with advantage 2.15 mm. The inner diameter of the second section 44 at the front edge 16 is in turn typically in the range 63 - 100 mm and with advantage 68 mm.

With these dimensions it is additionally possible that the maximum thickness MT of the second section 44 is in the range of 4/3 - 2.3 times thicker and with advantage 1.72 times thicker than the fourth thickness T4 at the front edge 16. It may also be in the range 2.2 - 4.6 and with advantage 3.1 times thicker than the third thickness T3.

The fourth thickness T4 is also higher (thicker) than the third thickness T3 and it is with advantage in the range 1.1 - 3 times higher (thicker) and with advantage 1.8 times higher (thicker) than the third thickness T3. The diameter of the second section at the front edge 16 is with advantage in the range 3.8 - 6.2 and with advantage 4.7 times higher than the second distance d2.

The diameter of the second section at the front edge 16 may additionally be in the range 28 - 40 and with advantage 32 times higher than the maximum thickness of the second section 44. The diameter may furthermore be in the range 1.5 - 2.7 and preferably 1.9 times higher than the sum of the first and second distances di and d2. It is possible that these relationships are not applicable for higher diameters. The first distance di may additionally be in the range 1.0 - 1.9 times longer than the second distance and with advantage 1.4 times longer. The sum of the maximum thickness MT of the second section and the third thickness T3 of the first section may additionally be in the range 1.16 - 2.13 and with advantage 1.46 times higher than the second thickness T2. With these dimensions there is provided an annular or cylindrical front element 14 that has good aerodynamic properties, where especially the size of the bulge and its placing along the axis A has been found to ensure that the throwing object can be thrown far, that it retains its shape and retains its aerodynamic properties. When the front element is provided with a bulge in this way, it has been found that the circular cross-section is retained during use. The placing of the bulge at the second distance d2 from the front edge 16 in turn ensures that the aerodynamic properties of the front element are retained. They are thus not degraded by the introduction of the bulge.

The third distance d3 is typically in the range 20 - 25 and with advantage 22.7 mm. The fifth thickness T5 is typically essentially the same as the third thickness T3. The sum of the maximum thickness MT of the second section 44 and the third thickness T3 of the first section 42, i.e. the thickness of the front element at the bulge, may additionally be in the range 3.1 - 4.5 and preferably 3.9 times higher than the fifth thickness T5. The sum of the third and fourth thicknesses T3 and T4, i.e. the second thickness T2, maybe in the range 1.9 - 3.6 and may preferably be 2.7 times higher than the fifth thickness T5.

The first, second and third distances di. d2 and d3 may furthermore be used to form a first expression and the first and second distances di and d2 may be used to form a second expression. The first expression may more particularly be formed as the first distance di subtracted from a sum of the second and third distances d2 and d3, while the second expression may be formed as the second distance d2 subtracted from the first distance di. The first expression maybe in the range 1.5 - 5 and preferably 2.6 times higher than the second expression. The first expression thereby defines the amount of third section 46 that supports the part of the cloth 12 that faces the atmosphere, while the second expression defines an amount of overlap between the first and third sections 42 and 44.

Through providing the first, second and third sections with the above- described dimensions there is provided a front element 14 with a structure that safely holds the tail 12 and keeps it smooth outside the third section 46. This also has a beneficial influence on the aerodynamic properties of the throwing object 10.

There are a number of variations that may be made to the invention. It is possible to omit the tail element, in which case only the hollow body and the fastener strips are used. In this case there is of course no need for the hollow body to comprise three different sections. It can instead be a solid ring or a solid tube.

The number of strips can be varied. It is possible with only one strip, which may extend in a zigzag or meandering way around the front edge. In this case, the first direction on the exterior surface may be provided at an angle to the cylinder axis, such as forty-five degrees, and the second direction on the interior surface may be provided at an angle to the first direction, such as ninety degrees. It should be realized that the zigzag pattern may be used also. The first and second directions need thus not be aligned with the axis A, In the case of a group of fastener strips. Each strip can be tilted an angle in relation to the axis, such as an angle of 5 degrees the number of fastener strips may vary in the range between two and twelve strips. It is also possible to vary the above given relationships between the various strip properties and the hollow body properties outside of the given ranges. It is likewise possible to omit the holes.

It is also possible with other types of thickness variations of the second section than linear. It is for instance possible to use exponential and/or parabolic thickness variations. The thickness variation may thus be a continuous variation. However, it is as an alternative also possible with a stepwise thickness variations. It is also possible that there is no cut between the second and third sections. It is actually possible that the third section is omitted even if the first and second sections are used.

The invention has mainly been described above with reference to a few embodiments. However, as is readily appreciated by a person skilled in the art, other embodiments than the ones disclosed above are equally possible within the scope of the invention, as defined by the appended patent claims.

Claims

1. A throwing object (io) comprising a hollow body (14) comprising at least one strip (22, 24, 26, 28, 30, 32) having at least two contact areas (Ai, A2, A3, A4, A5, A6) configured to releasably attach to an external attaching surface (34), wherein the hollow body (14) has a front edge

(16) on which said contact areas (Ai, A2, A3) are provided, the front edge (16) encircling an axis A defined through a hollow interior of the hollow body (14) and each fastener strip (22, 24, 26, 28, 30, 32) stretching in a first direction along an exterior surface (20) of the hollow body (14) towards the front edge (16), curve around the front edge (16) and stretch back in a second direction along an interior surface (18) of the hollow body (14).

2. The throwing object (10) according to claim 1, wherein the hollow body (14) is cylinder-shaped with the axis A being the cylinder axis and the first and second directions are both parallel with the cylinder axis A.

3. The throwing object (10) according to claim 1 or 2, wherein the contact areas (Ai, A2, A3, A4, A5, A6) are evenly distributed on the front edge (16) around the axis A.

4. The throwing object (10) according to any previous claim, wherein the number of contact areas is in the range 2 - 12.

5. The throwing object (10) according to any previous claim, wherein the fastener strips (22, 24, 26, 28, 30, 32) have a first thickness Ti and the front element (14) has a second thickness T2 at the front edge (16), where the first thickness Ti is lower than two times the second thickness T2 and with advantage lower than the second thickness T2.

6. The throwing object (10) according to any previous claim, wherein the exterior surface (20) of the hollow body (14) has a diameter D at the front edge (16), each strip has a width W and the diameter D is 4.6 -

13.7 times higher than the strip width W, and with advantage 6.9 times higher.

7. The throwing object (10) according to any previous claim 5, wherein the strips have a width in the range of 6 - 14 mm and with advantage 10 mm and a thickness Ti in the range 1.2 - 1.8 mm and with advantage of

1.5 mm.

8. The throwing object (10) according to any previous claim, wherein the hollow body (14) comprises holes (36, 38, 39) in the exterior surface (20) through which holes the fastener strips (22, 24, 26, 28, 30, 32) are running for allowing each fastener strip (22, 24, 26, 28, 30, 32) to run from inside the hollow body, through a corresponding hole (36, 38, 39), stretch in the first direction along the exterior surface (20), curve around the front edge (16) and stretch back a distance in the second direction along the interior surface (18). 9. The throwing object (10) according to any previous claim, wherein each fastener strip (22, 24, 26, 28, 30, 32) comprises fastening means for attaching to receiving means of the external attaching surface (34), where the fastening means may comprise hooks and the receiving means may comprise corresponding loops or vice versa. 10. The throwing object (10) according to any previous claim, wherein the hollow body (14) is a TPU and each fastener strip is a nylon strip.

11. The throwing object (10) according to claim 10, wherein the hollow body (14) has a shore A hardness in the range 90 - 100 and preferably of 95.

12. The throwing object (10) according to any previous claim, wherein the hollow body (14) is a hollow front element and further comprising a hollow tail element (12) attached to the front element (14), wherein the front element comprises a first and a second cylinder shaped section (42, 44), where the first section (42) has a larger radius than the second section (44) and is folded over the second section at the front edge (16), the first section having a third thickness T3 and stretching a first distance di in an axial direction away from the front edge (16) and the second section having a fourth thickness T4 at the front edge (16) and the tail element being inserted and held between the first and second sections.

13. The throwing object (10) according to claim 12, wherein the thickness of the second section (44) is variable and increases continuously in an axial direction away from the front edge (16) until a point of maximum thickness MT and thereafter decreases continuously, thereby defining a bulge (48) placed at a second distance d2 from the front edge (16), wherein the maximum thickness MT is 4/3 - 2.3 times thicker and with advantage 1.72 times thicker than the fourth thickness T2 at the front edge, wherein the first distance di is in the range 1 - 1.9 times longer than the second distance d2 and with advantage 1.4 times longer . 14. The throwing object (10) according to any previous claim, the front element further comprising a third section (46) joined to the second section (44), wherein the third section (46) has a fifth thickness T5 that is essentially the same as the third thickness T3 and stretches a third distance d3 away from the second section (44) in the axial direction. 15. The throwing object (10) according to any of claims 12 - 14, wherein the tail element (12) is a cloth is made of a natural or synthetic fibre.