Exercise machine for lower extremeties
BACKGROUND AND OBJECTS OF INVENTION 
     The present invention relates to a machine for exercising muscles of the body and particularly without putting any stress on the spinal column. The exerciser stands, bent over with the exerciser&#39;s elbows resting on a flat surface. The exerciser has a strap in the nature of a harness around the exerciser&#39;s hips, which is connected to a transmission system from which forces are exerted by pulling on weight connected to the transmission system. By having the harness around the hips of the exerciser and by having the exerciser&#39;s elbows resting on a flat surface, no force is exerted on the spinal column. 
     An object of the present invention is to provide a novel machine of the type described to promote the strengthening of the tendons and muscles of the arms and legs. 
     Another object of the invention is by providing a tilting mechanism for the feet, whereby pressure can be varied at different angles from the position while the exerciser is resting his/her arms on a flat surface, and his/her upper body is in a fixed position. 
     It is yet another object of the invention to provide hand grips that may be mounted on a flat surface whereby the exerciser&#39;s hands can grasp the grips with his hands and his arms can rest on the flat surface and means whereby the grips may be changed to a different position when the platform upon which the exerciser is standing is tilted. These arrangements provide for the exercising of the lateral muscles as well as the direct muscles of the legs and arms. 
     It is still a further object of the within invention to provide a mechanism, of the type described, having a chain and sprocket transmission system which permits the pulling of a plurality of weights that may be preselected against the pull of gravity, vertically. 
     It is an additional object to provide a novel means for connecting the weights to the transmission system so that different weights may be installed, and thereby changing and increasing or decreasing the forces that are to be pulled by the exerciser. 
     Many inventions have attempted to create a design and apparatus to exercise the various parts of the human anatomy, but in many instances, these devices have caused injury to the spinal column with resulting neurological impairments. 
     It is a primary object of the present invention to provide an exercise mechanism that will not place stress on the spinal column, but will confine the forces to the hips, arms and legs of the exerciser. 
     SUMMARY OF INVENTION 
     The within invention has a frame which is L-shaped with parallel girders that are connected with cross-struts and girders at the top and the bottom to form an L-shape box frame. A moveable chain engages and meshes with a sprocket mounted at the upper horizontal girder of the frame and travels down, and meshes with a sprocket located below the upper sprocket and then travels in a horizontal direction to another sprocket contiguous with the feet of the exerciser and engages and meshes therewith. Connected to the sprocket where the feet of the exerciser is located on the mounting bar, is a harness whereby the exerciser may step inside the harness and place the harness, which is a flat belt that is adjustable, over the hips of the exerciser. There are grips for which the exerciser can hold on to a flat armrest. The exerciser can then force him/her against the forces of the chain which has the pull of the weight against the pull of gravity. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Other objects and purposes of the invention will be more readily ascertained by reference to the drawings in which: 
     FIG. 1 is a perspective view of the exercise machine. 
     FIG. 2 is a side view in elevation of the machine looking from the left side of FIG. 1. 
     FIG. 3 is a rear view in elevation of the FIG. 1 with the background omitted. (for clarity). 
     FIG. 4 is a front view in elevation of FIG. 1, with a partial background (for clarity) of the machine. 
     FIG. 5 is a top plan view of FIG. 1. 
     FIG. 6 is an exploded view of the exerciser&#39;s foot platform in its normal position. 
     FIG. 7 is an exploded view of the exerciser&#39;s foot platform in its tilted position. 
     FIG. 8 is a side diagrammatic view of the exerciser-user operating the machine on the platform in its normal position. 
     FIG. 9 is a side diagrammatic view of the exerciser-user operating the machine on the platform in its tilted position. 
    
    
     DETAILED DESCRIPTION 
     Reference is made to the following detailed description. In FIG. 1, there are two lower horizontal girders, 1a and 1b. The girders 1a and 1b are connected by the lower horizontal girder 4 at the couplers 1c and 1d. Also connected to the couplers 1c and 1d are the vertical girders 2a and 2b, forming an &#34;L&#34;-shaped frame member on each side of the girder 4. The vertical girders 2a and 2b are connected to the upper horizontal bridge girder 3. 
     There are front vertical girder segments 5a and 5b, which are parallel to vertical girders 2a and 2b, respectively. The segments 5a and 5b are connected to the horizontal segment girders 6a and 6b, respectively. Horizontal segment girders 6a and 6b, are connected to vertical girders, 2a and 2b, respectively, by means of the couplers 18a and 18b, at a midway point on the vertical members 2a and 2b, whereby the upper horizontal girder segments 6a and 6b, are parallel to each other and also parallel to the lower horizontal girders, 1a and 1b, respectively. The front vertical girder segments 5a and 5b, are connected by the couplers, 19a and 19b, to the lower girders, 1a and 1b, respectively. 
     Platform 7 is fastened to the top surface of the upper horizontal girders, 6a and 6b, in a conventional manner. Extending above the surface of the platform 7 are the upper hand grips, 16a and 16b, which are connected to the lower surface of the platform 7. Extending below the platform 7 are the lower hand grips, 17a and 17b, which are also fastened to the lower surface of the platform 7, forward of the grips, 16a and 16b. 
     There are two vertical cylindrical shaped weight guides, 10a and 10b, parallel to each other. The top end of each is connected to the upper horizontal bridge girder 3, by means of the nuts 13 which are threaded to the ends of the vertical guides, 10a and 10b, (see FIG. 3). 
     The weights 15, which are in the form of rectangular bricks have openings 41 to which the vertical guides 10a and 10b are inserted, and pass therethrough, and permitting said weights 15 to be raised and lowered on said guides, 10a and 10b. 
     There are helical springs 39a and 39b circumscribing the lower ends for the vertical guides 10a and 10b, respectively. There are spring adjusting screws 40a and 40b for controlling the tension of the springs 39a and 39b, respectively, located at the rear side of the lower horizontal girder 4. (See FIG. 3). These springs, 39a and 39b, absorb the shock of the weights 15, when they are returned from an elevated position to their normal stationary resting position. 
     The transmission components, which are connected to the weights 15 can be observed by reference to all of the Figures of the drawings, particularly FIGS. 1, 2 and 3. The chain connector block 14 is connected to the chain segment 11a by the coupler 14a. As many weights 15 as are desired, are selected by sliding the individual weights 15 up on the guides, 10a and 10b, and inserting a shaft or pin through the openings 41a in the coupler block 14. Each weight 15 may be pre-designed to be as heavy as 15 or 20 pounds. As many weights may be lifted as desired by the exerciser-user. 
     The chain segment 11a meshes with the perimeter teeth of the upper sprocket 31 which sprocket 31 is supported by the upper sprocket support bracket 12, which is welded or otherwise secured to the upper horizontal bridge girder 3 between the vertical guides 10a and 10b. The upper sprocket 31 is mounted on the axle 32, which is movably supported by the side of the support bracket 12. 
     The chain segment 11b extends down from the sprocket 31 between the chain guard 33 (see FIG. 2) and passes over the teeth and meshes with the teeth of the lower sprocket 34. Sprocket 34 is mounted on the lower sprocket axle 32a, which is movably mounted in the lower rear sprocket support bracket 9. Support bracket 9 is permanently secured to the lower horizontal chain guard 8. Guard 8 extends from the middle of the lower horizontal girder to the foot stand base bracket 42. The guard 33 and guard 8 are for the purpose of providing safety to prevent clothing or the like, being caught in the moveable chain segments 11a, b, and c. 
     Mounted on the foot base bracket 42 is the foot stand fixed support members, 22a and 22b. 
     The adjustable foot stand components can be observed in more details in the views of FIGS. 1, 2, 4, 5, 6 and 7. The foot stand platform 30 is connected to the side tilt brackets 29a and 29b. The foot stand tilt bar 27 passes through openings in the fixed support, 22a and 22b, which are aligned with the openings in the tilt bracket 29a and 29b. The tilt bracket 29a and 29b is adjustable. There is a pinhead 20 connected to the bar 27. Extending from the bar 27 near pinhead 20 is the locking pin 21. Locking pin 21 is designed to be inserted into one of the openings 35, by pulling on the pin 20, disengaging the locking pin 21, and inserting it into any one of the plurality of radial placed openings 35. By so doing the foot platform 30 will be tilted from a flat plane into planes of different angles to the horizontal. 
     The chain segment 11c passes over and meshes with the teeth of the front sprocket 36. Refer to FIGS. 6 and 7. A lower front sprocket support 24 is permanently mounted on the foot stand base bracket 42 and supports the sprocket 36 in the same manner as the other sprockets, 31 and 34, are supported as herein previously described. The chain segment 11d extends upwardly from the sprocket 36 and is movably anchored in an opening in the foot stand 30. An eye bracket 26 with a stop 26a is connected to the end of chain segment 11d. Secured to the eye 26 is the body belt 23. There is an adjustable buckle 28 for changing the size of the of the belt 23 for adjusting the needs of exerciser&#39;s having different sizes. For preventing the eye 26 and stop assembly from being disengaged from the foot stand 30, a sprocket support lock 25 is mounted on the foot stand 30 and contiguous with the chain segment 11d. 
     There is an adjustable ring 38 which will keep the belt 23 between the legs and maintain the pressure on the outer thighs. 
     In the view of FIG. 4, can be observed is the front connector guide 43, which provides structural support between the horizontal girders 6a and 6b. 
     The legs 44 of exerciser 45 are identified in the views of FIGS. 6, 7, 8 and 9. 
     THE OPERATION OF THE MACHINE 
     This machine is not operated by a motor, but operated by the pull of the exerciser. The exerciser must first determine how much weight he/she desires to place on the chain 11, which has the segments 11a, b, c and d. The weights 15, as described previously, may be increased or decreased. The preferred choice of the weights is 15 to 20 pounds per the rectangular brick. 
     Once the exerciser has determined how much weight he/she decides to use, it is necessary for the exerciser to place a pin in the openings 41 through the openings 41a in the chain block 14 in order to secure those weights to the chain 11 transmission system, comprising of the various segments of chain 11, including 11a, b, c and d. The exerciser now has to place the belt 23 over his/her hips in the manner shown in FIGS. 8 and 9. The belt has an adjustment as previously described located at 28, which is adjustable for the size and convenience of the user. There is a ring 38 which will prevent the belt from becoming involved with the connection to the chain and maintain it tight around the users body, as shown. 
     The belt 23 as previously stated is made of a conventional belting material, such as a type used as seat belts in airplanes and automobiles. The ring 38 is made of leather, which prevents slipping. It keeps the belt straps between the legs and the pressure on the outer thighs. It is adjustable and slides up and down on the belt 23. 
     The user must stand on the platform 30, which has been described as the foot stand. The user places the belt in a position as indicated in FIGS. 8 and 9, depending upon the position of the stand 30. The exerciser takes his/her hands and places them on the grips 16a and 16b. The exerciser now pulls forward or backward, holding on to the grips and attempts to pull the weights 15, which are connected to the chain 11 by moving the body. By so doing the legs must create forces against the pull of the weights 15, the leg muscles become exerted and the tendons and muscles of the legs are now stretched by this exertion caused by creating forces against the weights 15. The grips, 16a, b, and 17a, b, create a position for the body so that the forces are confined upon the hips and legs rather than upon the upper back. 
     If it is necessary for the position of the foot stand 30 to be changed, the pin 21 is inserted in the selected opening 35. The pin 20 must be pulled outwardly and the pin 21 is then inserted in the selected opening 35 at the predetermined position in the bracket 29a, whereby the foot stand 30 can be tilted as shown in FIG. 7. References made to the view of FIGS. 7 and 9 showing the pin in a different position than in the position shown in FIGS. 6 and 8. The platform 30 is now tilted as shown in FIGS. 7 and 9 and the exerciser is now standing at a different angle tilted from the horizontal plane simulating being pulled on water skiis, and other similar activities, for the purpose of strengthening the leg muscles, creating balance and removing pressure from the spinal column and still arriving at the exercises necessary to strengthen the tendons and muscles of the lower extremities. The exerciser in the tilted position will not place his/her arms on platform 7, but instead will place the hands as shown on FIG. 9 on the grips 17a and 17b. 
     As can be observed in FIGS. 7 and 9, the tilting of the footstand 30 can take place by adjusting the pin 21 into the openings 35 as desired. The top of the footrest 30 will then be tilted at an angle from the horizontal. 
     The other important adjustment in preparing the machine for use is the amount of weight to create the forces to be pulled at the end of the transmission system. At the end of the transmission system is the location where the strap 23 is placed over the hips of the user. The amount of the brick shaped weights 15 can be selected by placing the pins in the openings 41 and 14a in the connector 14, to place a preselected amount of weight on the chain 11a, b, c and d, whereby the user can be pulling as much as 300 pounds and even more if the weights are increased by change of size and number of individual bricks 15.