1. Field of the Invention
The present invention relates to kites and, more specifically, to a kite which has sufficient lift and stability for superior flight characteristics at high altitudes.
2. Background Information
Flying a kite is a well-known and entertaining activity. Kites are generally constructed of a frame formed of interconnected, thin wood strips which are joined at their ends to the edges of a flexible cover sheet. A line or string is attached to the frame to enable the user to control the kite in flight. A tail is also attached to the kite to improve its stability.
A typical kite frame is formed of two frame members or struts which are disposed perpendicular to each other about a connecting cross point. Other frames utilize two diagonally overlapped struts and a third, central cross strut. The cover sheets have shapes coinciding with the boundary of the peripheral ends of the struts. Such cover sheets have diamond and other multi-sided shapes.
However, the foregoing conventional kites do not have sufficient lift and stability for suitable flight characteristics, particularly at high altitudes. More specifically, the conventional kites tend to roll to an undesirable degree when flown at high altitudes and are not stable under most meteorological conditions. Furthermore, the conventional kites are rather difficult to assemble.
It is an object of the present invention to provide a kite having sufficient lift and stability for superior flight characteristics at high altitudes.
It is another object of the present invention to provide a kite which is easy to fly and is controllable and stable in flight.
It is another object of the present invention to provide a kite having a structure which is strong, lightweight, easy to assemble, and inexpensive to manufacture.
It is still another object of the present invention to provide a kite with reduced roll characteristics and which flies with high stability under most meteorological conditions.
It is another object of the present invention to provide a kite having a novel aerodynamic surface defining a conical-shaped sector portion and a rotational vane which results in more stable flight characteristics and increased lift.
It is yet another object of the present invention to provide a kite which provides striking visual effects and maximizes the presentation of ornamental designs on one or more surfaces of the kite.
It is yet another object of the present invention to provide a kite which is cost effective yet operationally efficient.
The foregoing and other objects of the present invention are carried out by a kite comprised of a cover sheet having first and second opposed main surfaces. A frame assembly is attached to the second main surface of the cover sheet to define a body having an overall height and an overall width. The frame assembly has frame members connected together to form a generally conical-shaped sector portion having an air passage through which air flows when the kite is in flight. A rotational vane is mounted on the frame assembly for undergoing rotation to regulate the flow of air flowing through the air passage when the kite is in flight.
The frame members preferably comprise a first frame member, a second frame member, a third frame member, a fourth frame member, and a fifth frame member. Each of the first, second and third frame members has first and second opposed end portions. The first and second frame members are overlapped at a connecting point with the corresponding first ends being spaced at a first predetermined distance apart and with the corresponding second end portions being spaced at a second predetermined distance apart. The third frame member overlaps the first and second frame members at the connecting point and extends outward from the connecting point so that the first end portion of the third frame member is disposed between the second end portion of the first frame member and the first end portion of the second frame member and so that the second end portion of the third frame member is disposed between the first end portion of the first frame member and the second end portion of the second frame member.
The fourth frame member has a first end portion connected to the first, second and third frame members at the connecting point and a second end portion. The fifth frame member has a first end portion connected to the first end portion of the first frame member and a second end portion connected to the first end portion of the second frame member. The second end portion of the fourth frame member is connected to a generally central portion of the fifth frame member. The fifth frame member has a generally curved peripheral edge portion defining a curved peripheral edge of the conical-shaped sector portion of the frame assembly.
The kite also preferably has a flexible line, a flexible tail, and a cord frame. The flexible line is connected to the connecting point of the first, second, and third frame members and extends through the cover sheet and outward from the first main surface of the cover sheet. The flexible tail is connected to and extends away from the cover sheet. The cord frame connects the first, second, third, fourth and fifth frame members together to form the frame assembly.
The foregoing summary, as well as the following detailed description of preferred embodiments of the invention, will be better understood when read in conjunction with the accompanying drawings. For the purpose of illustrating the invention, there is shown in the drawings embodiments which are presently preferred. It should be understood, however, that the invention is not limited to the precise arrangement and instrumentalities shown. In the drawings:
While this invention is susceptible of embodiments in many different forms, this specification and the accompanying drawings disclose only certain examples of the use of the invention. The invention is not intended to be limited to the embodiments so described, and the scope of the invention will be pointed out in the appended claims.
In the following description of the preferred embodiments of the present invention, the term “about” is used to quantify the preferred dimensions of the kite and its components. The term “about” is defined to cover the specific dimensions described as well as values within a range of ±25% of the specific dimensions described.
Throughout the following description and drawings, an identical reference number is used to refer to the same component shown in multiple figures of the drawings.
Referring now to the drawings in detail, wherein like numerals are used to indicate like elements throughout, there is shown in
The frame assembly 14 is formed of first, second, third, fourth and fifth frame members or struts 40, 50, 60, 70 and 80, respectively. Each of the first, second and third struts 40, 50 and 60 has first and second opposed end portions, such as the first and second end portions 42 and 44, respectively, of the first strut 40, the first and second end portions 52 and 54, respectively, of the second strut 50, the first and second end portions 62 and 64, respectively, of the third or cross strut 60, the first and second end portions 72 and 74, respectively, of the fourth strut 70, and the first and second end portions 82 and 84, respectively, of the fifth strut 80. Each of the first, second, third, fourth and fifth struts 40–80 is preferably formed of a thin, lightweight, substantially rigid material. Although lightweight wood, such a bamboo or balsa wood, is utilized in a preferred embodiment of the present invention, the struts 40–80 may be formed of any other suitable lightweight material including, for example, a plastic having the characteristics described above. It is understood by those of ordinary skill in the art that a plastic frame could be injected molded to form all five struts in one piece in the shape shown in the drawings and further described below to provide the finished product.
Referring to
The first, second, third and fourth struts 40–70, including the corresponding first and second ends thereof, are joined to the second main surface 22 of the cover sheet 12. Preferably, an adhesive, such as hot mill glue, is employed to join the struts 40, 50, 60 and 70 to the cover sheet 12. Due to the overlapping relationship between the struts 40–60 and the tension created by a cord 100 as further described below, each of the struts 40–60 has a slight bow formed therein, as shown in
Referring to
The kite 10 is provided with a cord frame 90 which is shown in dashed line in
Another important feature of the invention resides in the formation of the cord frame 90 using the single piece of string 100 for holding the frame assembly 14 securely in its assembled condition and for providing a string extension portion 100e for rotationally supporting the vane 116 as described below.
The struts 40 and 50 are first positioned to form an X-shape as shown in either of the embodiments of
Although in the foregoing embodiment the string 100 is formed of a single piece of string, it is understood by those skilled in the art that the string 100 may be formed of several pieces of strings which are suitably connected together to form the cord frame 90 as described above. Furthermore, the string extension portion 100e for supporting the vane 116 may be constituted of a separate piece of string whose opposite ends are secured to respective apexes 25, 35 of the frame assembly before or after the cord frame 90 is formed.
As best shown in
The vane 116 is mounted on the string extension portion 100e of the string 100 for undergoing rotational or turning movement relative to the cover sheet 12 and frame assembly 14. The string extension portion 100e, which extends along a diametrical line of the vane 116, defines a rotational axis of the vane 116. In this embodiment, the vane 116 is a generally semicircular-shaped member and has a radius which permits the vane 116 to undergo free rotational movement relative to the cover sheet 12 and frame assembly 14 about its rotational axis. Stated otherwise, the vane 116 is permitted to undergo rotational movement about its rotational axis without contacting the cover sheet 12 or the frame assembly 14. In the present embodiment, the vane 116 comprises a circular piece of material, such as heavy paper, cardboard or light, thin paper or plastic, which is folded in half to form the semicircular shape of the vane 116. In the folded state, the two halves of the circular piece of material are secured together by suitable connecting means, such as an adhesive or bonding tape. Prior to securing the two halves of the circular piece of material together, the vane 116 is mounted on the string extension portion 100e of the string 100 such that the string extension portion 100e extends along the diametrical line of the vane 116 as shown in
It will be appreciated by those of ordinary skill in the art that the conical-shaped sector portion 110 forming the slot 114 and the rotational vane 116 define a flight stabilization device or stabilization means for stabilizing the kite 10 as the kite is pulled into the wind. More specifically, when the kite 10 is drawn through the air against the wind in the in-flight configuration shown in
It will be appreciated by those of ordinary skill in the art that without the slot 114 and the vane 116, air currents striking the main surface 20 of the kite 10 are primarily divided and deflected in opposite directions of the body of the kite 10. It is a well-known aerodynamic phenomena that air currents dividing and deflected in opposite directions result in a vacuum or low pressure point in the area where the air currents separate. Undoubtedly, this low pressure area results in eddy currents which tend to destabilize the kite 10. If the direction or velocity of the air changes, or if the angle or relative movement of the kite changes with respect to the air currents, this vacuum or low pressure area will shift relative to the main surface 20 of the kite 10. This causes the kite to be tossed or heaved due to the change of this low pressure area relative to the main surface 20 of the kite. By providing the conical-shaped sector portion 110 and the vane 116 across the slot 114 of the conical-shaped sector portion 110, this low pressure area is substantially eliminated, thereby stabilizing the kite 10.
Referring again to
In a preferred embodiment, the control line 16 is comprised of a nylon monofilament line having at least 20-pound strength, such as those commonly used in fishing. The elastic properties of nylon make it best suited for use in winds of varying intensity. The line segments 16a, 16b have the same length, and the line segment 16c has a smaller length than the line segments 16a, 16b. This relationship in the length of the line segments 16a–16c provides further stability for the kite 10 during flight. It is understood that the overall length of the control line 16 is not critical and that a control line having a length between 75 feet and 1500 feet may be used. It has been found that control lines having a 20-pound strength are best suited for use when the wind is between 7–15 miles per hour, that lines having a 25-pound strength are best in winds between 12–25 miles per hour, and that lines having 30-pound strength are best in winds between 24–45 miles per hour.
The tail 18 is provided with a tail hanger comprised of a thin, lightweight string having a first line portion 18a and a second line portion 18b connected at one end to form a loop portion 18c. Opposite ends of the first and second line portions 18a, 18b are connected to the intersecting struts at respective apexes 29, 31. An elongate extension 18d is secured to the loop portion 18c for providing stability to the kite 10 during flight. The extension 18d may be formed of any thin, flexible material, such as a thin, flexible fabric or ribbon. It has been found that use of a flexible ribbon provides the best flying performance for the kite. Preferably, the extension 18d of the tail 18 has a length of approximately 10 feet which is suitable for high wind conditions.
In a preferred embodiment, the frame assembly 14 has a predetermined size (e.g., length and width) sufficient to enable the kite 10 to be easily transported and yet have adequate lift for flight. Preferably, the first and second struts 40 and 50 have a length of about 24 inches, a width of about ⅓ inch and a thickness of about ⅓ inch. The third or cross strut 60 has a length of about 20 inches, a width of about ⅓ inch and a thickness of about ⅓ inch. The first and second ends of each of the first, second and third struts 40, 50 and 60, respectively, are disposed adjacent to one of the apexes 25, 27, 29, 31, 33 and 35 in the cover sheet 12. As noted above, the peripheral edges of the cover sheet 12 form a generally curved line between each pair of apexes so as to result in the six (6) sided figure shown in
It will be appreciated by those of ordinary skill in the art that the dimensions for the kite of the present invention are not limited to the foregoing preferred dimensions. For example, the length and width of the kite, excluding the control line and the tail, may be larger or smaller (e.g., for miniature size kites) than the foregoing preferred lengths and widths depending, for example, on the particular use for the kite, such as for competition or advertising purposes. The lengths of the control line and the tail are appropriately selected to conform to the dimensions for the frame and the cover selected for the kite in order to insure stability of the kite in flight.
In use, after the control line 16 has been secured to the frame assembly 14 as described above and shown in
In the embodiment of the kite 10 described herein, the first end portion 72 of the strut 70 extends downwardly from the connecting point 66 and the second end portion 74 of the strut 70 extends upwardly from the loop 100c connecting the struts 70 and 80 together. The extension of the first end portion 72 from the connecting point 66 facilitates connection of the strut 70 to the struts 40–60 at the connecting point, as shown in
It will be appreciated by those of ordinary skill in the art that kite 10 may readily be sold in kit form. A kit for producing the kite 10 includes the five struts 40–80, the cover sheet 12, the string 100 for the cord frame 90, the vane 116, the control line 16, and the tail 18. The kite 10 can be readily assembled as described above and shown in the drawings. The unique structural design of the kite provides for the simplicity of its structure, and this novel feature results in both ease and simplicity of construction and reduced manufacturing costs.
It will also be appreciated that the kite 10 of the present invention is suitable for use as an advertising or display device. For example, as shown in
It will be appreciated by those skilled in the art that the kite according to the present invention has a unique structural configuration employing low cost components that can be easily manufactured and assembled with a minimum of effort into a kite that flies easily and in a stable manner. The novel kite configuration results in a high strength-to-weight ratio. The unique construction of the kite according to the present invention also allows the kite to fly in a stable manner even after being subjected to damage of up to 30% to 40% of its structure (e.g., cover sheet, frame assembly, and cord frame).
The kite of the present invention also provides a novel flight stabilization device comprised of the conical-shaped sector portion and the rotational vane which operate to provide sufficient stability for superior flight characteristics at high altitudes and under most meteorological conditions.
From the foregoing description, it can be seen that the present invention comprises an improved kite. It will be appreciated by those skilled in the art that obvious changes can be made to the embodiment described in the foregoing description without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiment disclosed, but is intended to cover all obvious modifications thereof which are within the scope and the spirit of the invention as defined by the appended claims.
Number | Name | Date | Kind |
---|---|---|---|
2476801 | Blazi | Jul 1949 | A |
2483614 | Benson | Oct 1949 | A |
2520704 | Wisney | Aug 1950 | A |
6315246 | Wu et al. | Nov 2001 | B1 |
6499695 | Talamo | Dec 2002 | B1 |
6722613 | Phillips et al. | Apr 2004 | B1 |
20050224660 | May et al. | Oct 2005 | A1 |
Number | Date | Country | |
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20060006278 A1 | Jan 2006 | US |