The present invention is directed to control systems for kites used in water and wind sports, which are sometimes known as control bars, and which typically include a quick release loop that secures a rider, via a harness, to the kite.
The present invention solves many problems existing in the art. As an initial matter, the present invention provides a control system including quick release loop for a water sports harness where the forces transmitted through the loop are decoupled from the handle that activates the quick release mechanism. Many common configurations in the industry result in the handle being coupled to the tensile forces that are transmitted from the kite to the harness via the loop. This can present several issues, such as changing the release force, as it can increase or decrease depending on how much force is being transmitted through the quick release. This leads to unreliable activation. Additionally, the constant loading of the handle can cause it to creep over time, which introduces play into the mechanism and can lead to the handle becoming stuck in partially released positions. Therefore, there is a need in the art for a quick release loop assembly that decouples the release handle from the forces transmitted through the loop. There is also a need in the art for a quick release loop that facilitates the untwisting of kite lines after a rotation, but prevents rotation of the loop when the user is not hooked into the harness. This keeps the loop in the same orientation when the user is unhooked so that the user does not have to check or adjust the orientation of the loop before hooking back in.
Many quick release loops also offer the user the ability to change loop sizes or styles to accommodate different riding styles or disciplines. However, because only one end of the loop is incorporated into the quick release mechanism, the second end is typically considered to be static. Therefore, many manufacturers have secured the second end of the loop in a fashion that is difficult to release and even may require tools. It is desired in the art to provide a quick release assembly that permits the second, static, end of the loop to be released easily and efficiently, without the use of tools, which will allow users to switch loops on the fly.
Yet another problem that the present invention seeks to resolve is the twisting of the landing line relative to the user or the kite. Twisting the landing line causes it to contract and can introduce a turn in the kite as the single line becomes shorter. Twisting can also inhibit release if it causes an obstruction within the mechanism. Therefore, it is desired in the art to provide a quick release assembly that is capable of indexing the landing line with the kite and user to avoid introducing twists into the landing line.
Yet another problem with currently available control systems is that from time to time the landing line tube will require servicing or disassembly but there are not readily available solutions that allow the landing line tube to be installed in a manner that permits non-destructive disassembly. The present invention meets these and other needs existing in the art.
The invention is directed to a water sports control system having a quick release loop assembly. The invention includes a quick release loop assembly, sometimes referred to as a “quick loop” which includes a loop that a user hooks into a harness. The quick loop is also attached to a plurality of lines that are rigged to a kite. Power from the kite is transferred through the quick loop to the user and provides propulsion. The control system also includes a control bar structured to translate along the lines that run between the user and the kite. Two control lines extending from the ends of the control bar allow the user to adjust the power developed by the kite, as well as steer the kite, by manipulating the control bar.
Focusing more specifically on the quick release loop assembly, it preferably includes a housing which houses a quick release mechanism and which also includes a handle or slide for activating the quick release mechanism. When activated, at least one end of a loop is released from the quick release loop assembly, thereby freeing the user, who is typically attached to the assembly via a hook extending from a harness that receives the loop.
At the other end of the quick loop is a receptacle that receives a plurality of lines or tubes from the kite, which can include a static line for transferring forces from the kite to the user, and in other embodiments can also include a landing line tube, which will be discussed in further detail below. However, in a most preferred embodiment, the handle or slide is decoupled from the forces that are transmitted between the static line and the loop. By way of example, the loop can include retention members on its ends which are configured to be inserted into a retention mechanism within the quick loop. The retention mechanism can include a pawl and ledge. In such a configuration the weight of the user is transmitted through the loop and onto the ledge. A common design for a release mechanism might involve the release of the ledge itself. However, this would not decouple the slide from the forces that are transmitted to the edge. Therefore, in a most referred embodiment, the release handle or slide activates a mechanism which instead permits the retention member to slide off of the ledge and out of the housing.
By way of further example, the retention mechanism can include a pivot pawl, which is biased by a torsion spring to rest obliquely against the corner of the ledge. A distal end of the pivot pawl extends from the ledge forming a recess between the pawl and the ledge. Additionally, the pivot pawl is dimensioned and configured to rotate about a point that is offset from, and inboard of, the recess itself. Therefore, when the loop is inserted into the retention mechanism, it will apply force on the pawl at a point that is offset from the pivot point of the pawl, and in a direction that is substantially perpendicular to the moment arm. Accordingly, the pivot pawl will rotate away from the ledge, allowing the retention member to pass through. Once beyond the ledge, the pivot pawl is then free to rotate back into position, trapping the retention member against the ledge in a retention recess. As may be readily understood, insertion of the loop into the retention mechanism requires relatively little force. However, withdrawal of the loop is substantially prevented. The retention member is dimensioned and configured to rest against the ledge (once inserted into the retention mechanism) and the vast majority of force applied to the loop will be transmitted into the ledge. In a most preferred embodiment, the pivot pawl rests against the side of the retention member in order to keep it on the ledge, however, the pawl, ledge, and retention member are dimensioned and configured such that the point at which the retention member pushes against the pawl is substantially in line with the pivot point of the pawl. In one embodiment, the distal end of the pawl includes a heel to accommodate the retention member in the appropriate orientation within the retention recess. Therefore, no moment can be created, and the pivot pawl will not be influenced to lift by the retention member. If the user desires to withdraw the loop from the retention mechanism, the user must first rotate the pawl out of the way and allow the retention member to slide off of the ledge.
In order to create an easily accessible quick release mechanism out of the foregoing arrangement, a handle can be provided on the housing which is configured to lift the pawl when activated by the user. In a most preferred embodiment, a portion of the housing, for example the upper portion, is configured to slide along a central shaft of the housing. The slide can then be configured to lift the pawl when urged away from the user. In a most preferred embodiment, a line is strung between a proximal end of the pawl and an opposite side of the housing. When the slide is pushed far enough to make the line taught, the line will pull on the proximal end of the pawl, the pawl will be lifted, and the loop will come free. In either event, the slide is decoupled from the forces transmitted through the loop, which are mainly directed into the ledge. Instead, the only force the user need overcome is the spring force biasing the pawl in a closed configuration.
In a preferred embodiment, the retention mechanism can be used to retain the second, static, end of the loop, in order to provide an efficient and “tool-less” release mechanism for the second end of the loop. In a most preferred embodiment, the slide is configured to be disposed between a covered orientation, in which the slide meets the base of the housing and fully covers the retention mechanism, and an uncovered orientation, in which the retention mechanism is exposed, or at least the distal end of the pawl is exposed. In an uncovered orientation, the pawl can be manually lifted to release the second end, facilitating a “tool-less” release and change of the loop. In one embodiment, the distal end of the pawl can include a tab protruding therefrom which is dimensioned and configured to be engaged by a finger of a user.
In another embodiment, the control system includes an automatic swiveling feature that untwists the landing line tube and the static line. In such an embodiment, the receptacle that receives the landing line tube and static line is free to rotate relative to the housing and loop. Therefore, the receptacle is capable of indexing the landing line tube and static line with the kite itself, and relative to the loop. Such a feature can provide convenience and safety to those who practice unhooked maneuvers, such as aerial twists and rolls.
More specifically, when a user performs and unhooked roll, the user retains control of the control bar, and the roll will cause the control bar to rotate relative to the lines. This will cause the landing line tube and static line to twist around one another. Multiple successive rolls can compound the issue. However, it is desirable for the loop to index with the control bar, so that when the user is ready to re-hook, the loop is in the same orientation as when the user first unhooked. This avoids the need for the user to visual confirm and/or manipulate the loop before re-hooking. As such, it can be seen that the loop should index with the control bar when unloaded, but the lines and tube should be free to rotate relative to the control bar when loaded, so that the lines can be untwisted.
In a most preferred embodiment, the quick loop assembly includes a central shaft that is free to rotate within the housing. A biasing element, such as a spring washer, biases the shaft against the receptacle so that friction forces cause the entire unit to rotate as one, however, when the loop is loaded, and the biasing element compresses, the receptacle, housing, and loop become free to rotate relative to the central shaft. This behavior benefits a user during a maneuver as follows: A user first unhooks in preparation for a maneuver. The biasing element forces the receptacle against the shaft so that the entire quick release assembly will rotate as a single unit. The user performs a maneuver, such as a roll, in which the static line and power line tubes become twisted about one another. Because the entire quick release assembly rotated as one unit, the loop is maintained in the position that the user expects, which helps the user to quickly and efficiently re-hook. Once the loop is loaded again, the receptacle separates from the shaft and the receptacle is free to rotate relative to the loop. Therefore, the landing line tube and static line are free to untwist. Optionally, the control bar includes separate indexed chambers, including a static line chamber and landing line tube chamber, separated by a wall. When the user pulls back on the control bar, the separate chambers will tend to straighten out the lines as it rides along the lines.
Another feature of the present invention is an indexable landing line assembly. That is, the landing line indexes with the assembly, rather than being allowed to rotate inside the assembly. In a preferred embodiment, the landing line runs through the central shaft of the quick release assembly and is attached to a stopper at the bottom of the assembly. The stopper mates against a collar at the bottom of the shaft, and a ring floats between the stopper and collar. Each of the stopper and collar include interlocking teeth on their interface surfaces. Accordingly, if the quick release assembly is rotated, the teeth on the collar will engage the teeth on the stopper, and the stopper will index the landing line in sync with the assembly.
Yet another feature of the present assembly is an assembly by which the landing line tube can be non-destructively removed from the trim cleat in order to facilitate service or replacement. The trim cleat includes a cup having a substantially funnel or wedge-shaped configuration on its interior surface. The landing line tube is installed within the cup and a barbed insert is inserted into the top of the landing line tube. Once force is applied to the landing line tube, the barbed insert and cup act to wedge the landing line tube in place, much like a morse taper. As such, a secure fitment of the landing line tube is achieved within the trim cleat without the use of adhesives or other permanent fixtures.
These and other objects, features and advantages of the present invention will become clearer when the drawings as well as the detailed description are taken into consideration.
For a fuller understanding of the nature of the present invention, reference should be had to the following detailed description taken in connection with the accompanying drawings in which:
Like reference numerals refer to like parts throughout the several views of the drawings.
One embodiment of a control system 1 according to the present invention is depicted in
As can be seen in
In the depicted embodiment it can be seen that the quick release loop assembly 10 is mostly symmetrical about the shaft 50, having a pawl 30, ledge 70, and torsion spring combination 80 on both sides of the shaft 50. Additionally, the loop 10 includes retention bars 120 at each of the first end 11 and second end 12. The left half (as depicted) which includes a line 60 connected to the pawl 30 can be considered the quick-release side, as this is the pawl 30 that will release when the slide 21 is moved sufficiently away from the base 22. The right half can then be considered a semi-permanent side because the retention bar 120 on this side will stay connected even when the slide 21 is activated. It is semi-permanent, however, because it is still desirable for the second end 12 of the loop 10 to be released quickly and easily in order to facilitate changes in styles or sizes of loop 10.
Therefore, as can be seen in
Turning to
With reference now to
Now that those relationships have been described, their function as an automatic swiveling assembly can be appreciated. More specifically, upon initiating an unhooked maneuver the user will first unhook the loop 10 from his or her harness. This will unload the loop 10, causing the spring washer 400 to force the sleeve 51 against the receptacle 40. In this arrangement the entire assembly will rotate as one unit. This behavior will maintain the loop in the same orientation throughout the whole maneuver, which is an important attribute that allows the rider to quickly re-hook without having to check or adjust the orientation of the loop. However, because the rider may have rotated the control bar 90 during the maneuver, it is possible that the static line 200 and landing line tube 300 will twist about one another, causing a safety hazard. Accordingly, once the user rehooks and the loop 10 is loaded again, the receptacle 40 will separate from the sleeve 51 and the receptacle will be free to rotate independently of the loop 10. The static line 200 and landing line tube 300 will naturally tend to unravel if no force is holding them together, so the arrangement permits an automatic swiveling when the loop is under load. Otherwise, the user can pull on the control bar 90 and allow the separate indexed chambers 951, 952 to unwind the two lines.
Since many modifications, variations and changes in detail can be made to the described embodiments of the invention, it is intended that all matters in the foregoing description and shown in the accompanying drawings be interpreted as illustrative and not in a limiting sense. Thus, the scope of the invention should be determined by the appended claims and their legal equivalents.
This application claims benefit to a U.S. Provisional Patent Application having Ser. No. 63/316,791 filed on Mar. 4, 2022. The above application is incorporated by reference herein in its entirety.
Number | Date | Country | |
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63316791 | Mar 2022 | US |