CROSS-REFERENCE TO RELATED APPLICATIONS
Not applicable
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is directed to an exercise device for strengthening and hardening abdominal muscles.
2. Description of the Prior Art
Although many machines have been developed for strengthening abdominal muscles, the tossing of a medicine ball remains the preferred effective form of exercise for this function. However, there are many disadvantages connected with the use of amedicine ball. One of the main disadvantages of the medicine ball is that it requires two people. The medicine ball must be thrown by a first person toward the abdomen of the other. Another disadvantage of the medicine ball is that it is difficult forthe medicine ball to be thrown accurately. The ball may be thrown too low or off to the right or left of the abdomen. Finally, the medicine ball may be thrown too hard or not hard enough. An errant throw of the medicine ball can cause injury to theperson receiving the throw or the person receiving the throw is not likely to obtain optimum exercise benefits due to irregular and inaccurate throws of the medicine ball.
BRIEF SUMMARY OF THE INVENTION
An exercise apparatus for use in developing abdominal muscle. The exercise apparatus includes a supporting structure adjustably mounted on a platform and a lever structure mounted on the upper end of the supporting structure for pivoting about ahorizontal axis. The lever structure includes a first arm which is connected to a handle and a second arm which supports an impact member such as a medicine ball. The exercise apparatus is used by an individual by standing on the platform and pullingthe handle toward the for his or her chest. The individual then pushes the handle away from his or her chest which causes the impact member to swing toward the individual's abdomen. The supporting structure is adjustable so that the impact member canbe positioned to strike the abdomen of the individuals of different height.
BRIEF DESCRIPTION OF THE DRAWINGS
The character of the invention, however, may be best understood by reference to one of its structural forms, as illustrated by the accompanying drawings, in which:
FIG. 1 is an isometric view of the exercise apparatus of the present invention;
FIG. 2 is front elevational view of the exercise apparatus of FIG. 1;
FIG. 3 is an isometric view of the platform portion of the exercise apparatus;
FIG. 4 is a bottom plan view of the platform;
FIG. 5 is an isometric view of the upper portion of the supporting structure for the impact member;
FIG. 6 is an isometric view of the lower portion of the supporting structure for the impact member;
FIG. 7 is an elevational view of a medicine ball which forms part of the impact member;
FIG. 8 is an isometric view of a first flange which forms part of the impact member;
FIG. 9 is an isometric view of a second flange which forms part of the impact member;
FIG. 10 is an isometric view of a sleeve portion of the impact member;
FIG. 11 is an isometric view of a shaft portion of the impact member;
FIG. 12 is a front elevation view of the lever structure portion of the exercise apparatus;
FIG. 13 is an isometric view of a T-joint which forms part of the lever structure; and
FIG. 14 is an isometric view of a second T-joint which forms part of the lever structure.
DETAILED DESCRIPTION OF THE INVENTION
Referring first to FIGS. 1 and 2, the exercise apparatus of the present invention is generally indicated by the reference numeral 8 and comprises a platform 10, an adjustable supporting structure, generally indicated by the reference numeral 13,mounted on the platform 10, and a lever structure, generally indicated by the reference numeral 15, pivotally mounted on the upper end of the supporting structure 13. The lever structure 15 has a first arm portion 51 for supporting an impact member,generally indicated by the reference numeral 17, and a second arm 52 for supporting a handle 56.
Referring particularly to FIGS. 1-4, the platform 10 has a vertically extending base pipe or tube 12 fixed to the upper surface of the platform and buttressed by flanges 14a and 14b. A rubber mat 16 is fixed to the under surface of the platform.
Referring to FIGS. 1, 5, and 6, the supporting structure 15 includes a vertical outer pipe or tube 18 which is removably insertable into the base tube 12 and an adjustable U-bar 34. The U-bar 34 has an vertical inner tube 35 which is insertablewithin the tube 18 and a pair of upwardly extending vertical arms 37a and 37b. The vertical inner tube 35 has a plurality of apertures 36. The vertical outer tube 18 has an aperture 64. A locking pin 22 is connected to the outer tube 18 by a chain 20. When the inner tube 35 is inserted into the outer tube 18, the aperture 64 is capable of being aligned with any of the apertures 36 so that when the tube 35 is in a desired vertical position relative to the tube 18, the aperture 64 is horizontallyaligned with one of the apertures 36. The locking pin 22 is inserted through the aperture 64 and the corresponding aperture 36 to maintain the inner tube 35 in its adjusted vertical position. The T-shaped bar holders 38a and 38b are fixed to the upperends of the vertical arms 37a and 37b, respectively.
Referring to FIGS. 12-14, the lever structure 15 includes a pivoting bar 54 which is located between the first arm portion 51 and the second arm portion 52. The ends of the pivoting bar 54 extend through the bar holders 38a and 38b so that aportion of each end of the bar extends beyond the bar holders. The ends of the pivoting bar 54 are provided with holes 60a and 60b for receiving pins 58a and 58b, respectively. This retains the pivoting bar 54 in position on the bar holders 38a and38b. A curved bar 50 which has a bifurcated lower end is fixed to the lower end of the first arm portion 51. The lower ends of the curved bar 50, indicated by the reference numerals 61a and 61b, have apertures 62a and 62b, respectively. Aperture 62aand 62b are adapted to receive bolts 66 which in turn are adapted to receive nuts 48.
Referring to FIGS. 1, 2 and 7-11, the impact members 17 includes a conventional medicine ball 24 which is modified to contain a central hole 26 for receiving a sleeve 28. A solid pipe or shaft 30 extends through the sleeve 28. Flanges 32a and32b are mounted on the outer ends of the shaft 30 and about the medicine ball 24. The ends of the shaft 30 extend into T-joints 40a and 40b, see FIGS. 13 and 14. The T-joints 40a and 40b have vertical upper portions 44a and 44b, respectively, forreceiving the ends 61a and 61b, respectively, of the first arm portion 50. The vertical upper portions 44a and 44b have apertures 42a and 42b, respectively, which are aligned with apertures 62a and 62b, respectively, when the ends 61a and 61b areinserted into the vertical portions 44a and 44b, respectively. The T-joints 40a and 40b are secured to the ends 61a and 61b, respectively, by inserted bolts 66 through the aligned apertures of respective T-joints 40a and 40b and ends 61a and 61b,respectively, and applying nuts 48 to ends of the bolts 66.
The exercise device of the present invention is utilized by an individual in the following manner. First, the individual stands on the platform 10 facing the impact member 17. The weight of the individual helps to anchor the exercise device tothe floor. The inner vertical tube 35 is adjusted relative to the tube 18 to a desired height, wherein the medicine ball 24 is horizontally aligned with the individuals abdomen. The desired height is maintained as previously described by inserting thelocking pin 22 through the aligned holes in the tubes 35 and 18. The individual then grabs the handle 56 with both hands. The handle is drawn to the individuals chest, thereby swinging the medicine ball 24 away from the individual. The individual thenpushes the handle 56 away from his or her chest which causes the medicine ball 24 to swing into the individuals abdomen. In this way, the medicine ball 24 will always strike the individual's abdomen at the same desired location. The individual cancontrol the intensity of the impact by pushing the handle slowly or quickly as desired.
Clearly, minor changes may be made in the form in construction of this invention without departing from the material spirit thereof. Therefore, it is not desired to confine the invention to the exact form shown herein and described, but it isdesired to include all subject matter that properly comes within the scoped claim.
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