Abstract
Elevating rims allow the central hub of a back roller to be elevated from the ground. Elevating the back roller allows the user to increase their flexibility as they bend their back over the central roller. A user can purchase one or a set of rims to interchange the back roller and rims to accommodate different stretching and exercises. The joining mechanism can be threaded coupling in one or both of the hubs or can be a telescoping connection with or without a spring-loaded pin in a hole. The rims can have ribs to allow an installer to grip the rim and twist the rim on an axle. The back roller can be fabricated with an internal thread where changeable rims can be threaded into the inner diameter of the back roller to change the amount of elevation.
Claims
1. A back roller with changeable elevating rims comprising: a back roller; said back roller configured as an elongated tube having an outer diameter and an inner diameter; said outer diameter being padded or cushioned; said inner diameter having opposing ends with separate engaging features; at least two pairs of rims; each of said at least two pairs of rims having a first concentric circular rib sized to fit within said inner diameter of said back roller; said first concentric circular rib having complementary engaging features that engage into said separate engaging features in said inner diameter of said back roller; said at least two pairs of rims wherein each pair includes an enlarged concentric lip having an outside diameter that is larger than the outside diameter of said back roller whereby when either pair of said at least two pairs of rims are installed in said back roller, said outside diameter of said back roller is elevated; each of said at least two pairs of rims have a different outside diameter of between 11 and 14 inches, and said at least two pairs of rims are removable from said back roller to use said back roller without either of said at least two pairs of rims.
2. The back roller with changeable elevating rims according to claim 1, wherein said separate engaging features and said complementary engaging features comprise a threaded coupling.
Description
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S)
(1) FIG. 1 shows a perspective view of an axle with rims for elevating a back roller elevating.
(2) FIG. 2 shows an exploded perspective view of an axle with rims for elevating a back roller elevating.
(3) FIG. 3 shows the axle and rims on a back roller.
(4) FIG. 4A shows a perspective view of the back roller with 8 inch elevated rims.
(5) FIG. 4B shows a perspective view of the back roller with 10 inch elevated rims.
(6) FIG. 4C shows a perspective view of the back roller with 12 inch elevated rims.
(7) FIG. 4D shows a perspective view of the back roller with 14 inch elevated rims.
(8) FIG. 5A shows a second preferred embodiment for connecting the axle.
(9) FIG. 5B shows a third preferred embodiment for connecting the axle.
(10) FIG. 5C shows a fourth preferred embodiment for connecting the axle.
(11) FIG. 5D shows a fifth preferred embodiment for connecting the axle.
(12) FIG. 5E shows a sixth preferred embodiment for connecting the axle.
(13) FIG. 6 shows an alternate preferred embodiment using threaded rims and a threaded back roller.
DETAILED DESCRIPTION OF THE INVENTION
(14) FIG. 1 shows a perspective view of an axle 20 with rims for elevating a back roller 18. In this preferred embodiment, the axle 20 is an elongated tube that has threaded ends that are threaded into the rims. The length of the axle 20 is sized to match the length of the back roller 18 (a portion is shown in this figure). The rims have a ridge or step 31 as a first circular hub rib 34 that fits within the inside diameter 15 of a back roller 18. The outer diameter of a second rib 30 elevates the back roller 18 above the padded outside diameter 16 surface of the back roller 18. A second concentric circular rib 37 extends from within the first circular hub rib 34. The length of the step 31 is sized to support the back roller 18 when a person is placing a load on the back roller 18. For purposes of illustration the length of the step is about of the diameter or about 1 inch in length, but the length can be greater of lesser depending upon the design considerations or the structural loading.
(15) The end of the shaft 21 can be seen through the opening 33 of the hub 33. In this embodiment the hub has a plurality of ribs 32 that extend from the hole 33 to the rib or outer lip 30. This embodiment shows three equally spaced ribs but more or less than three are contemplated. It is further contemplated that there could be no ribs. The ribs 32 provide a gripping area for a person to grasp the rim to tighten or loosen the rim on the central axle 20. While the wall 31 is shown on the inside of the rims, the wall could also be flush with the outer surface of the rim.
(16) FIG. 2 shows an exploded perspective view of an axle with rims 19 for elevating a back roller elevating. This exploded view shows the threaded ends 21 of the axle 20 that thread into the threads 33 of the axles. The hub rib 34 of the hubs fit within the back roller (not shown in this figure). The ribs 32 extend from the central hub of the rims to the outer hub 34. The inner wall 31 (from FIG. 1 is not present in this embodiment of the axles of the elevated axles.
(17) FIG. 3 shows the axle and rims on a back roller 18. The padded back roller is shown secured between the hubs. In the rims elevated the back roller above the padded surface of the back roller 18. The ribs 32 of the hub are visible in this view. These ribs 32 allow a person to turn the rim on the axle to tighten the rims on the threads of the axle to tighten the grip of the hubs on the back roller. Studs 39 create point contacts the help to prevent loosening of the hubs on the back roller. In this figure, the central area 35 is covered to prevent debris from entering into the central pipe axle. In the preferred embodiment the axle is hollow with a diameter of about 1 inch, but could be as small as inch to as large as 1 or 2 inches.
(18) FIG. 4A shows a perspective view of the back roller 18 with 8 inch elevated rims 51, FIG. 4B shows a perspective view of the back roller 18 with 10 inch elevated rims 52 and FIG. 4C shows a perspective view of the back roller 18 with 12 inch elevated rims 53. It should be notes that in the embodiment shown in these figures, the sides of the hubs are completely covered and smooth to prevent debris from entering into the central area of the back roller tube or hub. While diameters of 8 inches 51, 10 inches 52 and 12 inches 53 are shown and described in these figures, any dimension or diameter is contemplated that is larger in diameter than the outside diameter of the back roller.
(19) FIG. 4D shows a perspective view of the back roller 18 with 14 inch elevated rims 54. This embodiment has a variation from the embodiments shown and described in FIGS. 4A-4C because the hub has a plurality of lightening or clearance holes 54. There are four holes 54 but more or less than four holes are contemplated. Further, any of the hub internal ribs and/or wall features shown in the previous embodiments are contemplated and can be incorporated with this rim.
(20) FIG. 5A shows a second preferred embodiment for connecting the axle. The internal pope sections 60 and 61 are connected or joined into hubs 30. The ends of pipe 60 can be threaded 21 into the ends 33 of the hubs 30 or can be glued or otherwise bonded. A central joiner 62 joins the center of the pipes 60. Pins 63 connect through the joiner pipe 62 and the pipes 60 and 61. It is contemplated that multiple pin holes for pins 63 allow for an adjustable tight fit between the opposing ends of the back roller 18. The multiple holes can accommodate variations in the length of the back roller 19.
(21) FIG. 5B shows a third preferred embodiment for connecting the axle. This embodiment uses a slip-fit tube 66 that fits over axle tubes 60 and 61 that are connected into the end cap hubs 30 from the tube ends 21 into the hub 30 central recesses 33. The slip-fit tube 66 can be secured 67 to one axle pipe 60 and can slide onto the other axle pipe 61.
(22) FIG. 5C shows a fourth preferred embodiment for connecting the axle. In this embodiment the slip pipe 70 has a plurality of holes 73. Spring loaded pins 72 are temporally engaged into the holes 73 in the slip pipe 70. Upon installation of the central axle onto the back roller 18, a first pipe 60 is joined to a first hub 30. The slip pipe 70 is slid onto the axle 60 until a pin 72 engages into a hole 73. The second axle pipe is engaged onto a second hub 30. The second pin 72 is depressed and slid down the slip pipe 70 until the second hub 30 is against the back roller 18 and the spring loaded pin 72 locks into a hole 73. While an elongated slip pipe 70 is shown, the slip pipe 70 could include just two holes 73, one for the first pipe 60 and one for the second pipe.
(23) FIG. 5D shows a fifth preferred embodiment for connecting the axle. In this embodiment one of the axle 75 pipes is flared 76 to telescope over the other axle pipe 60. A single spring loaded pin 72 that engages into a hole 77 in the expanded area of the first tube. The ends 21 of the tubes 60 and 75 are secured into the holes 33 in the hubs 30. The securing can be with a threaded connection or a bonding. Separating the axle tubes in two or more pieces allows the raised axle to be a shorter length where the packaged elevated hub is a smaller size for shipping.
(24) FIG. 5E shows a sixth preferred embodiment for connecting the axle. In this embodiment the axle 36 is formed in the elevated rollers. A central pipe 74 with spring loaded pins 72 engage into holes 73 to secure the elevated rims when the rims are pushed 78 together.
(25) FIG. 6 shows an alternate preferred embodiment using threaded rims and a threaded back roller 17. The elevated back roller 17 has a portion of the inner diameter 81 tapped for threads. The hubs 81 are threaded 82 with a complementary thread that allows the hubs to screw into the back roller 17. In this embodiment, an axle is not used to join the two hobs together. The hubs have a rib 80 that raises the back roller 17 from the rolling surface 80 of the hubs. While threads are shown, the engagement can also be with a bayonet type engagement. It is further contemplated that tube 20 can optionally incorporated to retain the hubs 81 and 82 in the ends of the back roller 17 to provide the rims to be used with or without back rollers 17 having threads.
(26) Thus, specific embodiments of a back roller elevating rims have been disclosed. It should be apparent, however, to those skilled in the art that many more modifications besides those described are possible without departing from the inventive concepts herein. The inventive subject matter, therefore, is not to be restricted except in the spirit of the appended claims.
SEQUENCE LISTING
(27) Not Applicable.
