the present invention is an interchangeable , modular ball game apparatus . the apparatus is intended for use either as a training aid , or for use as a goal in either a conventional ball game , or in games devised for the goal configurations made possible by the apparatus . as shown in fig1 the apparatus 10 is capable of supporting multiple hoops , including , among others , a large elongated net 12 for soccer , lacrosse and similar games , small triangular hoops 14 which can serve as targets for practicing baseball pitching and the like , overhead hoops 16 for practicing basketball shooting , etc . as shown in fig2 , the apparatus 10 comprises a base 20 and a stem 30 extending upward from the base 20 . the base 20 is a flat plate or planar member . the stem 30 may be supported on the base 20 in any convenient manner , e . g ., by a tube or saddle adapted to receive the bottom of the stem 30 , by screwing the stem 30 onto mounting holes provided in the base 20 , or by welding the stem 30 straight onto the base 20 . the base 20 may be held to the ground or surface upon which the base 20 is to rest by using anchoring holes 22 built into the base 20 and an anchoring means for anchoring the base 20 to the ground . preferably the stem 30 is bolted to the base 20 , but in permanent installations the stem 30 may be fixed to the base 20 by welding or other joinery techniques . the stem 30 is made from tubing , which may either be round tubing or square tubing , as shown in the drawings . the stem 30 may be furnished in an assortment of selected heights , such as four , six , or eight feet . the stem 30 may support at least one hoop 16 directly , e . g ., by a tubular mount 23 extending downward from the rim 18 of the hoop 16 , the tubular mount 23 having a diameter slightly greater than the stem 30 so that the mount 23 telescopes over the top end of the stem 30 . the tubular mount 23 may be secured to the stem 30 by a pin 24 or bolt inserted through aligned apertures in the mount 22 and the top end of the stem 30 , or may be permanently attached to the stem 30 by welding or the like . the stem 30 is capable of supporting a plurality of arms 32 . the arms 32 may be tubular , or made from solid material . although the arms 32 may be permanently attached to the stem 30 , the apparatus 10 has more functionality when the arms 32 may be selectively mounted on the stem 30 , so that the number of arms 32 , the height of the arms 32 , and the radial direction in which the arms 32 extend from the stem 30 are all adjustable . this is accomplished by permanently attaching a tubular mounting sleeve 34 to one end of each arm 32 . the mounting sleeve 34 has a diameter slightly greater than the diameter of the stem 30 so that the mounting sleeve 34 telescopes onto the top end of the stem 30 and slides down to the desired height . the height of the arm 32 can be temporarily fixed in various ways . in the drawings , the height of the arms 32 is fixed by inserting a pin 36 or bolt through aligned apertures in the mounting sleeve 34 and the stem 30 . the stem 30 may be provided with a plurality of apertures 38 defined therein and spaced apart vertically at predetermined heights , as well as radially at predetermined angles . in the event that the stem 30 is made from square tubing , this enables an arm to extend to the front , back , left side , or right side of the stem 30 . in the event that the stem 30 is made from round tubing , the same pin 36 and mounting hole 38 arrangement may allow arms 32 to extend at 90 °, 120 °, or other angular spacing about the stem 30 . the arms 32 support hoops of various shapes and sizes . referring particularly to fig2 , the arms 32 may support circular hoops 40 , triangular hoops 14 , square hoops 42 , or hoops of any desired geometric shape . as shown in fig1 , the arms 32 may support an elongated soccer style net 12 . as shown in fig5 , the hoop 50 may be furnished with decorative ornaments , such as flower petals 52 attached to the rim 54 , which lend a modern art affect to the appearance of the apparatus 10 . each hoop has a rim 18 and a net 56 attached to the rim 18 . the rim 18 can be made of round or square tubing . the net 56 has a mesh that may be made from metal , nylon cord , or any other appropriate material . the net 56 may have a closed bottom , so that balls entering the net 56 are retained therein , or an open bottom , so that balls entering the net 56 pass through the net 56 . the hoops may be attached to the arms 32 in various ways . as shown in fig2 and fig3 , the hoop may have a pin 60 extending from the rim 18 which may be inserted through aligned apertures or a bore 35 defined through the arm 32 . the pin 60 may be secured by a hitch pin 62 , cotter pin , or other fastener inserted through a transverse bore defined through the mounting pin 60 . as shown in fig2 with respect to triangular hoop 14 and circular hoop 40 , in this case the hoop is supported by a single fastener , so that if the mounting pin 60 is cylindrical , the hoop may be free to rotate about a vertical axis . alternatively , as shown in fig4 , the hoop 42 may be supported on the arm 32 by a pair of spaced apart mounting sleeves 64 mounted on one leg of the rim 18 , so that the mounting sleeves 64 slide onto the arm 32 . in the event that the arm 32 and the mounting sleeves 64 are made from square tubing , the hoop 42 is precluded from rotation about the arm 32 . however , if the arm 32 is cylindrical and the mounting sleeves 64 are made from cylindrical tubes , the hoop 42 may be free to rotate about a horizontal axis . furthermore , as shown in fig2 , a single hoop may have pin 60 at one end for attachment to the arm 32 by a single fastener , and a pair of sleeves 64 at the opposite end , so that the user may select the manner in which the hoop is supported , and in the case of triangular hoops 14 and the like , the user may select the orientation of the hoop ( apex oriented upward or downward ). turning now to fig6 , a vertical stem extension 70 may be slidably mounted onto the stem 30 . the height of the vertical stem extension 70 is fixed by inserting a pin 72 or bolt through aligned apertures in the stem extension 70 and the stem 30 . the stem extension 70 includes a plurality of attachment rings 74 fixed on at least one side of the stem extension 70 to which a volleyball , badminton , tennis or rebound net n may be attached . one side of the net n hooks onto the attachment rings 74 and the other side of the net n hooks onto attachment rings 74 provided on another modular ball game apparatus 10 . the stem extension 70 may be raised or lowered according to the height necessary for use with the net n . a canopy covering or a large mesh net may be held between several of the modular ball game apparatuses 10 . the covering or net is attached to the attachment rings 74 on the stem extensions 70 on each of the apparatuses 10 , therefore providing a tent - like enclosure . the enclosure keeps thrown balls within a confined space so that users do not have to go far to recover the balls . fig7 shows a perspective view of the modular ball game apparatus 10 with attachment brackets 80 affixed to the stem 30 . the attachment brackets 80 have a plurality of apertures 82 disposed radially on the brackets 80 . a middle screw is located in the center of each bracket 80 , and one of the arms 32 is threaded onto the screw . the arm 32 may be welded directly to the attachment bracket 80 . two attachment screws 84 that are attached to the stem 30 allow the brackets 80 to be held to the stem 30 . once the arm 32 is attached to the bracket 80 , the bracket 80 is positioned against the stem 30 such that the attachment screws 84 are aligned with two specific apertures 82 . wingnuts 86 or other fastening means hold the attachment bracket 80 onto the stem 30 . each set of apertures 82 sets the arm 32 at a designated angle , allowing the hoop 14 or other net to be positioned at that angle . when used with a bounce - back net , a user will be able to throw the ball and have it rebound to them depending on the angle at which the user has set the arm , and thereby , the net . fig8 shows a perspective view of the modular ball game apparatus 10 with a t - shaped connector 90 . the connector 90 fits into the top of the stem 30 . the connector 90 has a stem - engaging middle bar 92 and a pair of arm - engaging side members 94 on either side of the middle bar 92 . the stem - engaging bar 92 telescopes into the top end of the stem 30 , and each side member 94 telescopes into an open end of an arm 32 . the t - shaped connector 90 therefore allows for more arms 32 to be attached to the stem 30 so that more hoops and nets may be held . the connector 90 also allows for multiple apparatuses 10 to be joined together by connecting various stems 30 to the arms 32 connected to the t - shaped connector 90 . in use , the interchangeable , modular ball game apparatus 10 may be set up in any desired location . the base 20 may be freestanding , or it may be anchored in concrete or buried in the soil for permanent installation in parks , schools and other public facilities . the arms 32 may be permanently mounted to the stem 32 , if desired ; however , preferably the arms 32 are removably installed as needed in order to take advantage of the modular nature of the apparatus 10 . the arms 32 may be furnished in a variety of lengths , e . g ., an arm 32 supporting a soccer or lacrosse net 12 may require a longer supporting arm than a triangular hoop 14 . any number of arms 32 may be added to the stem 30 at any desired height . further , if the arm height , length , and radial orientation is acceptable , a hoop having one geometric shape may be removed from the arm 32 and replaced with a hoop having a different geometric shape . hence , the components of the apparatus are modular and interchangeable . referring now to fig9 , a second embodiment of the modular ball game apparatus 100 is shown . the second embodiment of the apparatus 100 has a horizontal beam stand 102 onto which a plurality of hoops 104 are attached . the hoops 104 each have a rim 106 and a net 108 attached to the rim 106 . the rims 106 are affixed to the stand 102 . the net 106 , which may be a bounce - back net , is secured to each of the rims 106 so that a user may bounce a ball against the net 108 and the net 108 rebounds the ball back to the user . in addition to being a bounce - back net , the net 108 may have a mesh that retains a ball within the net 108 to be retrieved later . the rims 106 may be welded directly onto the stand 102 or may be attached to the stand 102 using mounting screws . the stand 102 includes a middle beam 110 , which is adjustable in length , that holds the rims 106 and a pair of side bars 112 that stabilize the stand 102 . the side bars 112 each have a pair of feet 114 set under the side bars 112 which steady the side bars 112 on the surface the stand 102 is placed . although rectangular 42 , triangular 14 and circular 40 hoops are shown in the drawings , it will be understood that the present invention is not limited to hoops having these shapes , but encompasses hoops of any other geometric shape , e . g ., oval , hexagonal , etc . the interchangeable , modular ball game apparatus 10 and 100 and its components can be made out of metal or plastic . the apparatus can be used in an outdoor or indoor setting and is primarily used for recreational and athletic use , although it can be used for physical therapy or rehabilitation as well . the multidimensional interchangeable modular ball game apparatus can be used for throwing , kicking and hitting any type of ball , e . g ., a baseball , basketball , soccer ball , football , etc ., that the user desires to play with and can improve a user &# 39 ; s hand - eye and foot - eye coordination , as well as providing the user with aerobic and cardiovascular conditioning . it is to be understood that the present invention is not limited to the embodiments described above , but encompasses any and all embodiments within the scope of the following claims .
the multidimensional interchangeable modular ball game apparatus is used for building game playing skills , such as hand - to - eye and foot - to - eye coordination . the apparatus can be used for throwing , kicking or hitting any type of sports ball and can help with practicing all types of sports , as well as with early childhood development and rehabilitation . the apparatus includes a base with a stem extending from the base . arms of different lengths are supported by the stem and may also be placed at different heights . different geometrically shaped hoops and targets of varying sizes and colors can be made with an open or closed net . another embodiment includes a horizontal beam stand with hoops attached to the stand .