referring to the drawings in detail , pedals 46 and 48 are shown in fig1 and 2 in forward and rearward positions of the preferred embodiment . crank arms 4 , 6 rotate about pivot axis 7 on framework 70 . foot support members 14 , 16 have pedals 46 , 48 attached . support links 8 , 10 are connected intermediate the ends to crank arms 4 , 6 at pivots 9 , 11 and to foot support members 14 , 16 at pivots 13 , 15 . tracks 90 , 94 are attached to frame members 74 at pivot 93 and to track actuator 96 which is also attached to framework 74 . rollers 40 , 44 are connected to foot support members 14 , 16 at pivots 41 , 43 and are in rollable contact with tracks 90 , 94 . handles 36 , 38 are attached to handle supports 80 , 84 which are connected to framework 70 at pivot 39 . connector links 30 , 34 are connected to handle supports 80 , 84 at pivots 35 , 37 and to one end of support links 8 , 10 at pivots 31 , 33 . crossover member 56 is connected to framework 70 at pivot 55 . crossing links 50 , 54 are connected to crossover member 56 at pivots 53 , 59 and to handle supports 80 , 84 at pivots 51 , 57 . crossover member 56 and crossing links 50 , 54 form a crossover assembly as shown in fig1 and 2 that cause handle 36 to move forward when handle 38 moves rearward . load resistance is imposed upon cranks 4 , 6 by pulley 49 which drives flywheel 63 by belt 69 coupled to pulley 71 which is supported by the framework 70 at shaft 61 . tension belt 64 encompasses flywheel 63 with load actuator 66 connected for adjustment to vary the intensity of exercise on the exercise apparatus . control system 68 is connected to load actuator 66 and track actuator 96 with wires 67 , 65 , 95 using conventional means not shown . control system 68 can be programmed to adjust tension belt 64 using load actuator 66 or to change the incline of tracks 90 , 94 using track actuator 96 to vary the intensity of exercise during operation . framework 70 is attached to longitudinal frame members 74 which are attached to cross members 73 , 75 that are supported by a generally horizontal surface . operation begins when an operator places the feet upon the pedals 46 , 48 in the default side by side position of pedals 46 , 48 . moving the handles 36 , 38 and applying body weight to pedals 46 , 48 starts the crank arms 4 , 6 moving with ease . holding handles 36 , 38 generally still as denoted by handle position 1 ′, pedals 46 , 48 move through a relatively short pedal curve 1 shown in fig1 . allowing the handles 36 , 38 to move through handle range 3 ′ causes pedals 46 , 48 to move along pedal curve 3 . allowing handles 36 , 38 to move through handle range 5 ′ results in pedal curve 5 . even shorter pedal curves are possible when the user is not grasping the handles whereby only the feet of the user define the motion . in an alternate embodiment , pedals 46 and 48 are shown in fig3 and 4 in forward and rearward positions . crank arms 4 , 6 rotate about pivot axis 7 positioned forward of an operator at generally pedal height on framework 70 . foot support members 14 , 16 have pedals 46 , 48 attached at the ends . drive links 20 , 22 are connected to crank arms 4 , 6 at pivots 9 , 11 . drive link supports 86 , 88 are connected to drive links 20 , 22 at pivots 77 , 79 and to framework 70 at pivot 87 . support links 8 , 10 are connected to drive links 20 , 22 at pivots 21 , 23 and to foot support members 14 , 16 at pivots 13 , 15 . guides 26 , 28 are connected to framework 70 at pivot 17 and to foot support members 14 , 16 at pivots 25 , 27 . for this embodiment , guides 26 , 28 are further described as rocker links 26 , 28 . handles 36 , 38 are attached to handle supports 80 , 84 which are connected to framework 70 at pivot 39 . connector links 30 , 34 are connected to handle supports 80 , 84 at pivots 35 , 37 and to support links 8 , 10 at pivots 31 , 33 . crossover member 56 is connected to framework 70 at pivot 55 . crossing links 50 , 54 are connected to crossover member 56 at pivots 53 , 59 and to handle supports 80 , 84 at pivots 51 , 57 . crossover member 56 and crossing links 50 , 54 form a crossover assembly as shown in fig3 and 4 that cause control link 80 to move forward when control link 84 moves rearward . energy storage devices 60 , 62 are shown in fig3 and 4 as springs 60 , 62 connected to handle supports 80 , 84 at pivots 83 , 85 and to framework 70 at pivot 47 . springs 60 , 62 are intended to cause handle supports 80 , 84 to have a bias towards the default vertical position where the shortest stride occurs at elongate curve 1 . load resistance is imposed upon cranks 4 , 6 by pulley 49 which drives flywheel 63 by belt 69 and pulley 71 . flywheel 63 is supported by framework 70 at pivot 61 . tension belt 64 encompasses flywheel 63 for adjustable load resistance using adjustment knob 91 to vary the intensity of exercise on the exercise apparatus . framework 70 is attached to longitudinal frame members 74 and to cross members 73 , 75 that are supported by a generally horizontal surface . operation begins when an operator places the feet upon the pedals 46 , 48 in the default side by side position of pedals 46 , 48 . in the default mode , handle supports 80 , 84 are caused to be generally vertical in a side by side position by springs 60 , 62 . other forms of energy storage devices 60 , 62 may also be used . in the default mode , pedals 46 , 48 will follow the shortest stride length along default elongate curve 1 . startup is easy along the default elongate curve 1 . handles 36 , 38 remain generally stationary at position 1 ′ while pedals 46 , 48 follow elongate curve 1 . when handles 36 , 38 move through handle range 3 ′, pedals 46 , 48 move along pedal curve 3 . when handles 36 , 38 move through an even greater handle range 5 ′, pedals 46 , 48 follow pedal curve 5 . the maximum stride occurs when pedals 46 , 48 follow pedal curve 2 while handles 36 , 38 have the handle range 2 ′. an alternate embodiment is shown in fig5 which is essentially the same as the alternate embodiment shown in fig3 and 4 except that guides 26 , 28 have been replaced with rollers 40 , 44 and tracks 90 serving as guides . tracks 90 are attached to framework 70 and 74 at a predetermined angle . however , as shown in fig1 and 2 tracks 90 can be configured to have adjustable angles . rollers 40 , 44 are connected to the foot support members 14 , 16 at pivots 41 , 43 . the remainder of this alternate embodiment is essentially the same as the previous embodiment of fig3 and 4 . operation is the same as the previous embodiment where only pedal curves 2 and 5 are being shown in fig5 . referring to the drawings in detail , pedals 46 and 48 are shown in fig6 and 7 in forward and rearward positions of an alternate embodiment . crank arms 4 , 6 rotate about pivot axis 7 positioned adjacent to a horizontal supporting surface on framework 70 . foot support members 14 , 16 have pedals 46 , 48 attached . support links 8 , 10 are connected at the lower ends to crank arms 4 , 6 at pivots 9 , 11 and are connected at the upper ends to foot support members 14 , 16 at pivots 13 , 15 . tracks 90 are attached to frame members 74 at pivots 93 and track support pins 97 . tracks 90 can be repositioned by moving to alternate track support pins 98 or using an actuator 96 shown in fig1 . rollers 40 , 44 are connected to foot support members 14 , 16 at pivots 41 , 43 and are in rollable contact with tracks 90 . handle supports 80 , 84 are pivotally connected to the framework at pivot 39 . handles 36 , 38 are attached to handle supports 80 , 84 . connector links 30 , 34 are connected to handle supports 80 , 84 at pivots 35 , 37 and to support links 8 , 10 at pivots 31 , 33 . crossover member 56 is connected to framework 70 at pivot 55 . crossing links 50 , 54 are connected to crossover member 56 at pivots 53 , 59 and to handle supports 80 , 84 at pivots 51 , 57 . crossover member 56 and crossing links 50 , 54 form a crossover assembly as shown in fig6 and 7 that cause handle 36 to move forward when handle 38 moves rearward . load resistance is imposed upon cranks 4 , 6 by pulley 49 which drives flywheel 63 by belt 69 coupled to pulley 71 which is supported by the framework 70 at shaft 61 . tension belt 64 encompasses flywheel 63 with knob 91 connected for adjustment to vary the intensity of exercise on the exercise apparatus . framework 70 is attached to longitudinal frame members 74 which are attached to cross members 73 , 75 that are supported by a generally horizontal surface . operation begins when an operator places the feet upon the pedals 46 , 48 in the default side by side position of pedals 46 , 48 . moving the handles 36 , 38 and applying body weight to pedals 46 , 48 starts the crank arms 4 , 6 moving with ease . holding handles 36 , 38 generally still , pedals 46 , 48 move through a relatively short pedal curve 1 shown in fig6 . allowing the handles 36 , 38 to move causes pedals 46 , 48 to move along pedal curve 3 . allowing handles 36 , 38 to move a larger amount results in pedal curve 5 . moving the handles 36 , 38 through the maximum range results in pedal curve 2 . the alternate embodiment shown in fig8 is similar to the preferred embodiment of fig6 and 7 except that rollers 40 , 44 and tracks 90 serving as guides are replaced with rocker links 26 , 28 . handles 36 , 38 are attached to rocker links 26 , 28 . crossing links 50 , 54 are pivotally connected to rocker links 26 , 28 at pivots 51 , 57 and slide into hydraulic cylinders 102 and 104 also shown in fig9 . hydraulic cylinders 102 , 104 are coupled with hydraulic hoses 107 and orifice valves 103 , 105 . as crossing link 50 moves attached piston 110 into hydraulic cylinder 102 , hydraulic fluid is transferred to hydraulic cylinder 104 through hydraulic hoses 107 causing piston 112 to move attached crossing link 54 out of hydraulic cylinder 104 . adjustment of the orifice valves 103 and 105 controls the rate of hydraulic fluid transfer which controls the rate of movement of handles 36 , 38 . adjustment of the orifice valves 103 , 105 can occur from a remote location such as a control panel 68 shown in fig1 . another crossover design would replace one of the orifice valves such as 105 with a pair of cylinder return springs ( not shown ). the hydraulic crossover assembly can be used in all of the other embodiments shown . operation and load resistance are similar to the preferred embodiment . referring to the drawings in detail , pedals 46 and 48 are shown in fig1 and 11 in forward and rearward positions of the preferred embodiment . crank arms 4 , 6 rotate about pivot axis 7 positioned adjacent to a horizontal supporting surface on framework 70 . foot support members 14 , 16 have pedals 46 , 48 attached . support links 8 , 10 are connected at the lower ends to crank arms 4 , 6 at pivots 9 , 11 and are connected at the upper ends to foot support members 14 , 16 at pivots 13 , 15 . a pair of compound guides cause the intermediate portion of the foot support members to follow a predetermined curve , which in this case is an approximate straight line 143 . the compound guides comprise transfer links 128 , 130 connected to the framework at pivot 141 , handle supports connected to the framework at pivot 39 , intermediate support links 152 , 154 connected to the transfer links at pivots 137 , 139 and to the intermediate portion of the foot support members 14 , 16 at pivots 25 , 27 , a pair of coupling links 120 , 124 and 122 , 126 connected to the handle supports 80 , 84 at pivots 121 , 129 and 123 , 131 and to the intermediate support links 152 , 154 at pivots 125 , 133 and 127 , 135 . handles 36 , 38 are attached to the handle supports 80 , 84 for arm exercise . crossover member 56 is connected to framework 74 at pivot 55 . crossing links 50 , 54 are connected to crossover member 56 at pivots 53 , 59 and to transfer links 128 , 130 at pivots 51 , 57 . crossover member 56 and crossing links 50 , 54 form a crossover assembly as shown in fig1 and 11 that cause handle 36 to move forward when handle 38 moves rearward . alternately , opposing hydraulic cylinders 102 , 104 of fig9 may be used . load resistance is imposed upon cranks 4 , 6 by pulley 49 which drives flywheel 63 by belt 69 coupled to pulley 71 which is supported by the framework 70 at shaft 61 . tension belt 64 encompasses flywheel 63 with knob 91 connected for adjustment to vary the intensity of exercise on the exercise apparatus . framework 70 is attached to longitudinal frame members 74 which are attached to cross members 73 , 75 that are supported by a generally horizontal surface . operation begins when an operator places the feet upon the pedals 46 , 48 in the default side by side position of pedals 46 , 48 . moving the handles 36 , 38 and applying body weight to pedals 46 , 48 starts the crank arms 4 , 6 moving with ease . holding handles 36 , 38 generally still , pedals 46 , 48 move through arcuate pedal curve 1 shown in fig1 . allowing the handles 36 , 38 to move causes pedals 46 , 48 to move along pedal curve 3 . allowing handles 36 , 38 to move a larger amount results in pedal curve 5 . moving the handles 36 , 38 through the maximum range 2 ′ results in pedal curve 2 . the heel of the foot of an operator remains in contact with pedals 46 , 48 throughout most of the pedal cycle . the alternate embodiment shown in fig1 and 13 is similar to the preferred embodiment of fig1 and 11 except that the compound guides consist of several different elements . the compound guides comprise transfer links 128 , 130 connected to the framework at pivot 141 , intermediate support links 156 , 158 connected to the transfer links at pivots 137 , 139 and to the intermediate portion of the foot support members 14 , 16 at pivots 25 , 27 , and stabilizing links 144 , 146 connected to the intermediate support links at pivots 145 , 147 and to the framework at pivot 39 . pivots 25 , 27 follow the approximate linear curve 143 . handles 36 , 38 are attached to the intermediate support links 156 , 158 for arm exercise . crossover member 56 is connected to framework 74 at pivot 55 . crossing links 50 , 54 are connected to crossover member 56 at pivots 59 , 53 and to transfer links 128 , 130 at pivots 51 , 57 . crossover member 56 and crossing links 50 , 54 form a crossover assembly as shown in fig1 and 13 that cause handle 36 to move forward when handle 38 moves rearward . alternately , opposing hydraulic cylinders 102 , 104 of fig9 may be used . operation and load resistance are similar to the preferred embodiment . in summary , the present invention has distinct advantages over prior art because the elliptical stride movement of the pedals 46 , 48 change with the range of movement of the handles 36 , 38 while maintaining a generally elliptical pedal curves 3 , 5 , 2 even for the longest pedal stride . the heel of the foot of an operator remains on the pedal throughout most of the pedal cycle . easy starting occurs in when the handles 36 , 38 are held stationary as the pedals follow the stepping motion curve 1 . the present invention may be embodied in other specific forms without departing from its spirit or essential characteristics . the described embodiments are to be considered in all respects only as illustrative , and not restrictive . the scope of the invention is , therefore , indicated by the claims , rather than by foregoing description . all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope .
the present invention relates to a standup exercise apparatus that simulates walking and jogging with arm exercise . more particularly , the present invention relates to an exercise machine having separately supported pedals for the feet and arm exercise coordinated with the motion of the feet where the pedal stride length is determined by the movements of an operator . crank arms are positioned on the framework forward the operator at a height comparable to the pedals . compound guides are used to achieve elliptical curve pedal paths .