for the purposes of understanding the invention , reference will now be made to the embodiments illustrated in the drawings . it will be understood that no limitation of the scope of the invention is thereby intended . any alterations and further modifications in the described embodiments , and any further applications of the principles of the invention as described herein are contemplated as would normally occur to one skilled in the art to which the invention relates . fig1 - 8 depict one embodiment of the invention . the invented mouthguard 100 is composed of a base unit 102 and tether 104 . the base unit 102 is u - shaped to conform to a user &# 39 ; s mouth and the tether 104 extends from the front of the mouthguard . on the top surface , base unit 102 has a trough 112 running along the inside of the u - shape to fit the user &# 39 ; s upper teeth . in this embodiment , base unit 102 is comprised of three different portions : ( 1 ) a bottom tray 106 , ( 2 ) a top piece 108 and ( 3 ) a color insert 110 . the three components of the base unit are configured to fit together . the bottom tray 106 is u - shaped and will be sized to fit into the user &# 39 ; s mouth . the bottom tray 106 has a double outer wall 116 ( composed of inner wall 124 and outer wall 118 ) that can extend along the front of the mouthguard . if desirable , the double wall 116 can extend along the entire outside labial perimeter of the mouthguard , continuously or in sections . the inner and outer walls 124 , 118 are placed closed together so that a thin space or slot exists between the two in which the color insert 110 can be placed . the outer wall 118 of the double wall 116 has holes 122 that reveal the color insert 110 when it is placed in the slot 120 . the holes in this embodiment are in the shape of an “ x ” and an “ o ”, though the invention is not limited to these shapes . inner wall of the double wall has a “ trap door ” that encloses the slot to ensure that the color insert 110 is firmly set within the slot 120 . the trap door can be seen in detail in fig7 . fig7 is a cut - away depiction of the bottom tray 106 along lines a - a . as can be seen , outer wall 118 is a straight wall with holes 122 in it . inner wall 124 has a lip 126 that projects toward outer wall 118 . once the color strip is placed in the slot between the inner and outer walls , the projecting lip 126 will prevent the color insert from coming out of the slot . the location of projecting lip 126 is shown on inner wall , but it could easily be located on outer wall . top piece 108 is also in a u - shape to conform to the user &# 39 ; s mouth . top piece 108 can have the trough 112 on its upper surface and the bottom surface will conform to the upper surface of the bottom tray 106 . top piece 108 will also have a lip 114 that will come on top of the double wall 116 . lip 114 will help to seal the slot 120 and prevent color insert 110 from coming out of the slot 120 . a typical color tab / insert can be seen in fig9 . it is made of a firm yet malleable material , such as plastic or rubber , and can come in different forms , such as , but not limited to , stickers , decals , or just plain tabs . it can be of all various colors , but is not limited to a solid color as it may include patterns of different sorts as well . this provides an additional advantage over existing mouthguards . with the current molding process , it would be difficult , if not impossible , to incorporate elaborate patterns of any sort , let alone mass produce mouthguards with such patterns . for commercialization purposes , a multitude of different colored inserts can be inexpensively manufactured and packaged with a single mouthguard product . each component of base unit 102 can be easily manufactured using injection molding techniques . other techniques , such as extrusion blow molding , injection blow molding , compression molding , thermal forming or cast pour molding process lost core molding can also be used . bottom tray 106 can be composed of a relatively material that has some durability and flexibility , such as a thermoplastic elastomer ( tpe ). bottom tray 106 will be molded first . double wall 116 , slot 120 , holes 122 and lip 126 are all moldable features and mouthguard bottom tray 106 is easily removed from the mold . bottom tray 106 will be capable of accepting a second shot of a softer , pliable material , such as ethylene vinyl acetate (“ eva ”), on top of it to create top piece 108 during the injection molding process . in this process , the top piece will conform to the shape of the bottom tray 106 and the lip 114 can be shaped to cover both inner and outer walls 118 , 124 of the bottom tray 106 . color insert 110 can be easily manufactured in numerous colors and colored patterns to be included with the base unit 102 . it will be evident to one of skill in the art that any appropriate materials can be used for both the top and bottom pieces . to custom color the mouthguard , the user will choose the appropriately colored color insert 110 that corresponds to the team colors . in order to add the color insert 110 , the user must pull up the outer lip 114 of the top piece 108 and slide the insert into the slot 120 . the lip 114 will naturally return back to its original shape and cover both the tops of the inner and outer walls . alternatively , the color strip can be placed into the slot 120 through appropriate openings in the side or bottom of the mouthguard . after inserting the color insert 110 , the user will custom fit the mouthguard by boiling the mouthguard in water . this boiling process will soften the top piece 108 . afterwards , the mouthguard is placed in the user &# 39 ; s mouth and the user will bite down onto the mouthguard to conform the mouthguard to the teeth . after the mouthguard has cooled , the top piece 108 will be cured and fitted to the user &# 39 ; s teeth . in addition , the top piece 108 will be forced against the double wall 116 and on top of the double wall 116 to seal the slot closed . the configuration of the top piece 108 and the double wall 116 is best seen in fig8 . fig8 shows a cross - sectional view of the two components along line b - b . as can be seen in the detailed figure , the inner wall 124 and outer wall 118 are pressed against one another . this occurs , in part , from the pressure from the user biting down on the mouthguard during the customization process and the resilience of the top piece 108 after being cured through the boil and bite process . fig1 - 11 depict another embodiment that is a similar to the embodiment described above . similar to that embodiment , the mouthguard base unit 201 comprises a top piece 202 , a bottom tray 203 and color insert 204 . the bottom tray 203 has a single outer wall 207 instead of a double wall . single outer wall 207 has holes or revealed sections 206 in the front . top piece 202 has an indented section 210 in the front of it to accommodate the color insert 204 . color insert 204 will be placed in between the single outer wall 207 of bottom tray 203 and indented section 210 of the top piece 202 . during the customization process in which the mouthguard is boiled and custom fitted to the user &# 39 ; s teeth , the color insert will be secured in between the top piece and the bottom tray . fig1 - 14 depict another embodiment in which the top piece 302 does not completely overlay the bottom piece 303 . the top piece 302 only has an outer wall that ends in a lip 307 . only the front teeth come into contact with the top piece 302 at a bite portion 308 . the back teeth come into contact with the trough 304 of the bottom piece 303 . the bottom piece still has the holes 310 in the front of its outer wall 305 . the color insert can be seen through these holes 310 , as shown in fig1 . fig1 depicts another embodiment . unlike the embodiments described above , this embodiment is made of only one piece . similar to the bottom piece of the first embodiment , this mouthguard 401 has a double outer wall 402 and an inner wall 403 that form a trough 404 for the user &# 39 ; s teeth . the double wall 402 creates a slot 406 in which the color insert will fit . the outermost wall of the double wall 402 contains the holes 405 , and the color insert will be visible through these holes . fig1 depicts another embodiment that is similar to the previously described embodiment . in this embodiment , the slot 506 created by the double wall 502 extends all the way to the rear of the mouthguard 501 . this allows the option of adding holes all along the outer wall , in addition to the holes 505 in the front , and using a longer color insert to sit in the slot . the insert will then be visible through these additional holes all along the outer wall . fig1 depicts yet another embodiment that comprises just one piece 601 . it has an outer wall 602 and an inner wall 603 , forming a trough 604 for the user &# 39 ; s teeth . in the outer wall 602 , there is a removable section 605 that contains the holes 606 . this creates a recess or compartment 607 within the front wall of the mouthguard in which the color insert is to be placed . after the color insert is placed in the recess , the removable section is fit back into the recess , thereby firmly securing the color insert . fig1 depicts yet another embodiment that is made of only one piece 701 . the outer wall 702 has a slot 705 cut out in which the color insert 707 is inserted in from the side . the front of the outer wall 702 has holes 706 that penetrate to the back wall of the slot 705 . once the color insert 707 is inserted into the slot 705 , the color will be clearly visible . another means in which this invention can realize the advantage of mass production and easier customization by the user is to generally have a color strip attached to the outer surface of the labial wall of the mouthguard . this can be accomplished in a number of ways . two such ways are depicted in fig1 and 20 . again , like the embodiments described above , these two embodiments are made of only one piece . however , on the outer surface of the outer wall are protrusions 805 and 905 , respectively , on which the color tabs will be attached . these protrusions take the shapes of knobs 805 and ts 905 , respectively . with respect to the knobs 805 , the color tab 806 will have holes 807 to fit around the knobs , and that are spaced appropriately apart to allow the tab 806 to fit tightly against the face of the outer wall 802 . the ts 905 of the other embodiment perform a similar function of securing the color tab 906 to the body 901 . the color tab 906 will likely have to be of greater thickness than the tabs / inserts of the previous embodiments so that it may include the sister connections 907 to the t - shaped protrusions 905 . another means to accomplish this may be done by using a decal or sticker to stick to the front of the labial wall of the mouthguard , thereby eliminating the need for protrusions on the outer wall . the present invention may be embodied in other specific forms without departing from the spirit or general characteristics thereof ; therefore , the embodiments described herein are to be considered in all respects illustrative and not restrictive . the scope of the invention is to be indicated by the appended claims , rather than by the foregoing description .
this invention relates to a protective mouthguard for use by athletes that incorporates a color customizable feature , allowing users to customize the visible color of the mouthguard . the invented protective mouthguard has a u - shaped base that will fit inside of a user &# 39 ; s mouth . the front surface of the mouthguard can be visible when the mouthguard is worn by the user inside of his mouth . a colorable strip is placed inside a cavity in the front wall of the mouthguard and is visible through holes that are placed in the front wall .