Abstract:
The present invention is directed to a lightweight collapsible enclosure. The enclosure is adapted to attach to or about a folding chair. The enclosure provides vertical and lateral spans about and above the folding chair. A canopy is disposed over the spans to create an enclosure. The enclosure is readily collapsible with a folding chair.

Description:
BACKGROUND 
     1. The Field of the Invention 
     The present invention is directed to a lightweight collapsible enclosure. In particular, it is directed to an enclosure capable of being attached to a collapsible folding chair and providing an enclosure about multiple sides of the chair. 
     2. The Background Art 
     A number of attempts have been made to provide the user of a chair at least some protection from weather and the elements, such as sun, wind, rain, or snow. Such devices have included umbrellas, adjustable umbrellas, one or more movable panels for shields attached to a chair, warming huts used by ice fishermen, and various canopies or drapes used by sportsmen. 
     The known prior art suffer from several disadvantages, such as limited shelter about the user to protect from sun, wind, rain, or snow. Many of the devices lack practical portability because they are either heavy in weight or bulky in size and thereby require considerable time and energy to transport and/or erect. What is needed is a lightweight collapsible enclosure or cover that is easily transported and readily adaptable to a folding chair. Such a device would provide a place of shelter or protection at the beach, for spectators of various sports, or participants of sports such as ice fishing, and even a camouflage covering for hunters. What is needed is a shelter or multi-sided enclosure which is sufficiently rigid to withstand sun, wind, rain, or snow, but which unlike the known prior art multi-sided shelters, may be erected and put in place in a matter of seconds without the need of any tools, equipment, rope, stakes, or any other equipment to secure vertical or horizontal members of the enclosure. What is needed is a lightweight collapsible enclosure whose manufacture is cheap and inexpensive and whose structure is simple and requires little or no assembly on site. 
     BRIEF SUMMARY AND OBJECTS OF THE INVENTION 
     The present invention is directed to a lightweight collapsible enclosure capable of being attached to a folding chair such that when the chair is folded, the enclosure collapses with the chair. The enclosure is constructed of lightweight poles that can be attached to or inserted into tubular elements of a folding chairs to support a multi-sided readily collapsible enclosure to provide the user shelter from sun, wind, rain, and snow. The enclosure can be made of virtually any available material depending on its intended function. 
     A lightweight collapsible enclosure of the present invention comprises one or more support members, each having one or more lateral members to support a surrounding and/or an overhead enclosure. The vertical support members being insertable into tubular structures of a folding chair or readily attachable thereto such that at least a portion of the foldable collapsible enclosure can be left attached to the folding chair when it is folded. 
     It is an object of the present invention to provide a lightweight, collapsible enclosure. 
     Another object of the present invention to provide a collapsible enclosure readily attachable to a folding chair. 
     Another object of the present invention to provide a collapsible enclosure, which can be erected without tools. 
     Another object of the present invention to provide a collapsible enclosure, which can be erected in seconds. 
     Additional objects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objects and advantages of the invention may be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The foregoing and other objects and features of the present invention will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only typical embodiments of the invention and are, therefore, not to be considered limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which: 
     FIG. 1 is a perspective view of one embodiment of the foldable collapsible enclosure of the present invention; 
     FIG. 2 is a perspective view of the lightweight collapsible enclosure of FIG. 1, but in its collapsed state; 
     FIG. 3 illustrates one embodiment of a means for attaching a vertical support member of the present invention to the tubular structure of a known folding chair; and 
     FIG. 4 is an alternative illustration of a means for attaching a vertical support member of the present invention to a tubular member of a folding chair. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     It will be readily understood that the components of the present invention, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of the embodiments of the system and method of the present invention, and represented in FIGS. 1 through 4, is not intended to limit the scope of the invention, as claimed, but is merely representative of the presently preferred embodiments of the invention. 
     The presently preferred embodiments of the invention will be best understood by reference to the drawings, wherein like parts are designated by like numerals throughout. 
     FIG. 1 illustrates a preferred embodiment of the lightweight collapsible enclosure  10 . Enclosure  10  defines a multi-sided enclosure or shield to protect the user from sun, wind, rain, snow, or any other element, and can be used to provide a camouflage hut or shelter. 
     Enclosure  10  comprises one or more vertical support members  20 . Vertical support member  20  provides vertical height to enclosure  10  for covered head room for the user. In the preferred embodiment shown in FIG. 1, support member  20  is an inverted U-shaped body comprising a first vertical portion  22 , a lateral portion  24  and a second vertical portion  26 . Support member  20  is preferably made of lightweight tubular construction. First vertical member  22  is preferably of a tubular construction whose outside dimensions are smaller than and compatible with the inside dimensions of the tubular construction  40  of the folding chair, as shown in FIGS. 3 and 4. In this way, the vertical support member may be readily inserted into the opening defined by tubular structure  40  of the folding chair. If desired, means for securing the vertical support member  20  inside the tubular construction of the chair  40  are contemplated as shown in FIGS. 3 and 4. One embodiment shown in FIG. 3 provides a spring biased button  50  disposed inside vertical member  20  with the button extending through the side wall of member  20  such that the button can be depressed. Such devices are well-known. A corresponding hole  52  in the tubular construction of the chair  40  would receive button  50  when member  22  is inserted into tube  40  thereby releasably defining the relationship between vertical member  22  and tubular construction  40 . An alternative embodiment is shown in FIG. 4 with a conventional pin  56  extending through both tubular construction  40  and member  22 . 
     Vertical support member  20  also comprises a lateral portion  24  to provide a lateral span. In the preferred embodiment, support member  20  also comprises a downwardly extending portion  26 . The preferred embodiment does not contemplate that downwardly extending member  26  is inserted into or attached to the folding chair, but it could be if desired. When erected, the enclosure of the present invention provides a vertical frame defining both vertical and lateral spans to support the desired canopy. 
     Member  20  may be manufactured from a variety of materials, such as aluminum, aluminum alloys, or any other lightweight metals. In addition, member  20  could be made of plastics such as PVC or other sufficiently strong plastics. In the preferred embodiment, a rust free material is contemplated. 
     The enclosure of the present invention further comprises a canopy  30 . Canopy  30  comprises one or more vertical members  36  and an overhead member  38 . Not shown but also contemplated is a draped portion, which could actually hang down in front of the seated user as far as desired and even including one or more observation holes or windows. Similarly, side wall or back wall members  36  could include peephole/observation holes or transparent windows as desired (not shown). 
     Canopy  30  is supported by one or more support members  20  thereby spanning and enclosing the foldable chair  40 . Canopy  30  is disposed about support member  20  by eyelets  32  and/or sleeves  34  through which support member  20  passes. In this way, canopy  30  is readily and easily constructed of lightweight material suited for its intended purpose, readily and easily sewn to size and shape and to accommodate the insertion of one or more support members  20 . Canopy  30  may also include one or more ties  39  used to releasably secure the enclosure to a portion of the folding chair. 
     Canopy  30  may be constructed of any desirable material or fabric depending upon the use. If the use is for protection from the sun, it may be made of any desirable lightweight material. If canopy  30  is intended to shelter from wind, then canopy  30  should comprise a material having adequate windbreak characteristics and preferably maintaining lightweight and readily foldable characteristics. Similarly, if canopy  30  is intended to shelter from rain or show, canopy  30  should be of a material sufficiently rain or waterproof. If canopy  30  is intended as a camouflage covering, canopy  30  can be constructed of any desirable camouflage material compatible with the present invention. Still further, if the present invention were to be used by outdoor workers, such as construction or road crew workers, the canopy enclosure could be made of a material of such a bright color to enhance safety and visibility as needed. A flagman could, for example, have such a enclosure made out of a hazard yellow or orange to enhance visibility and safety. 
     One embodiment built by the applicant utilized electrical conduit to construct member  20  and a lightweight nylon material for the canopy. The resulting enclosure weighed only about 5 pounds (5 lbs.) and provided excellent protection from sun, wind, rain and snow. Equivalents thereto are contemplated by this patent. 
     Advantages of the present invention over the prior art is not only its lightweight characteristic, but its readily collapsible nature. As shown in FIG. 2, without impeding the folding of the folding chair, the enclosure readily collapses with the folding chair. This permits a user to change locations or directions within seconds without the burden of the tear down and set up of known shelters. A good example is ice fishing. When a tent shelter is erected over a hole in the ice, moving to a new location requires excessive time and work. With the present invention, the fisherman stands up, collapses the chair and enclosure, walks to a new location, unfolds the chair and enclosure and sits down again. This permits sheltered fishing and mobility not heretofore known. The same is true for game hunters who like to move to different locations. Using the present invention as a hunting blind, the hunter is able to easily transport his blind with him to virtually any desired location. Furthermore, if there arises an urgent, immediate need or desire to move or change direction of sight, transport and mobility is only seconds away. 
     Furthermore, the enclosure can be left inserted into or connected to the folding chair. In this way, without requiring the carrying of any more than a lightweight folding chair, the user can have the benefits of an encircling enclosure or enclosure to suit the needs of the user. The present invention, unlike the prior art, has no moving parts, is easy to manufacture, construct, and is erected in the mere seconds that it takes to unfold a collapsed folding chair. 
     It is also contemplated that a shoulder strap or carrying sling could be attached to either the enclosure or the chair to effect hands-free transporting of the enclosure. 
     In the foregoing specification, the invention has been described as reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.