EFFICIENT VERSATILE OSCILLATING PEDAL CYCLE

Abstract: An oscillating pedal type bicycle (Figure 32) is provided with a pedal lever having a front pedal supporting portion (482) and a rear power transmitting portion (484) which are rigidly connected together and which make an oblique angle with respect to one another, with the apex of the oblique angle pointing downwardly and to the rear in the intermediate position of the pedal levers. The two pedal levers each have an intermediate pivot point (480) which is generally under the seat (306) of the bicycle, with the rear end of the pedal lever near the driving hub (490) of the bike and the front end of the pedal lever supporting pedals and being located close to the position of the pedals in a conventional bike during the power stroke. The front portion (482) of the pedal lever between the pivot point and the pedal may be bent to increase the length of the stroke. The power ratio of the bike may be varied by varying the position of the driving chain (324), belt or other flexible member connected to the bicycle hub (490), along the length of the rearwardly extending portion (484) of each of the pedal levers. A chain positioning slider (Figure 33-488) on each of the rearwardly extending portions (484) of each pedal lever may be unlocked and moved along the length of the pedal lever by remote control (332, 368, 508, 510) operated from the handle bars (308) or front portion (474) of the frame of the bicycle. Each pedal lever (482, 484) is coupled to the driving hub (490) of the bicycle by separate clutches (Figure 19-240, 242) for independent pedal operation.

Description: - i - EFFICIENT VERSATILE OSCILLATING PEDAL CYCLE References to Related Patent Applications This patent application is related to and is a Continuation-in-Part of my prior " ϋ. • S. Patent Application Serial No. 879,220 filed February 21, 1978, and entitled "Powerful Oscillating Pedal Bicycle". Field of the Invention The present invention relates to oscillating pedal type cycles. Background of the Invention Conventional rotary pedal type bicycles have enjoyed wide usage over the years. They have the advantages of simplicity and ease of manufacture. However, they are also very restricted in their mode of operation and are limited in their capabilities. For example, let us consider a conventional ten-speed bike having a 27 inch wheel diameter, and a ratio of 3.6 revolutions of the rear wheel to 1 revolution of the pedals. Let us further assume that the ten speed bike is in high gear, and that the rider is making 60 strokes per minute with each leg, or one revolution per second of the pedals. Under these conditions the bicycle will be travelling at a speed of approximately 17.3 miles per hour or approximately 25.4 feet per second. No flexibility is provided in the application of power to the pedals. The rider must either fully rotate his legs at the rate of 60 times a minute or he cannot apply force to the rotating wheels. There is no possibility for the rider to shorten his stroke or apply brief impulses of high power to the bike. It is not possible to apply force with both legs to the two pedals simultaneously, if this should be desired. The conventional bike is therefore severely limited in its capabilities, as its mechanical limitations inflexibly dictate the mode of operation of the rider. Accordingly, an important object of the present invention is to provide a bicycle in which the rider controls the application of power to the bike, instead of having the bike dictate the mode of application of power it by the rider. It is also noted with regard to conventional bicycl that the diameter of the circle through which each ped rotates is about 13 inches. Of course, power is on applied to each pedal on the downward stroke during abo 180 degrees. However, to flexibly engage the pedal duri the full 360 degrees, the toe normally engages the peda Now, at the top of the stroke when pressure is appli downward on the pedal, no force goes into rotating t pedal; and more generally the effectiveness of the for varies as the cosine of the angle, ranging from 100% at degrees (horizontal) to zero at plus and minus 90 degre when the pedal is at the top and bottom of its stroke. plus and minus 60 degrees, 50% of the downwardly appli force is effective; and at plus and minus 30 degrees, abo 87% of the force is effectively translated into rotation torque, neglecting friction. The average effectiveness, a result of this factor , in a conventional bike is in t order of 70%, with 30% being lost. In addition, the need use the toe on the pedal, to accommodate 360 degrees ped rotation prevents fully effective application of t strength of the leg to the pedal. It is estimated that t resultant reduction in efficiency results in an addition loss of power or more than fifty per cent. Another object of the present invention is, therefor to increase the efficiency of the application of human pow to propel a bicycle. It is also noted that the driving mechanisms conventional 10-speed bicycles with their many sprockets a additional parts are relatively complex, having in the ord of 80 or more parts. A collateral object of the prese invention is to significantly reduce the complexity variable speed or variable ratio bikes. As will be developed in greater detail below, t present invention involves an oscillating pedal type cycl A number of different kinds of oscillating pedal type bik have been disclosed in the patent literature. However, it appears that the true capability of a properly designed oscillating pedal type bicycle has not been realized, as they are very rarely used, and are virtually never seen in competitive bike races. It is particularly interesting to note that two typical patents which are pertinent to the present invention, B. Ljungstrom, U.S. Patent No. 556,545, patented March 17, 1896, and British Patent No. 28,759 of 1896, both date back to the nineteenth century. Further, these patents appear to show designs which are mechanically unsound or at least inefficient, and probably inoperative. Accordingly, another object of the present invention is to provide a practical oscillating pedal type bicycle which is mechanically sound, which has a minimum number of parts, and minimum maintenance requirements. Brief Summary of the Invention In accordance with an important aspect of the invention an oscillating pedal type bicycle or cycle is provided with a pair of pedal levers, each of which has a forwardly extending pedal supporting portion and a rearwardly extending power application portion which are rigidly secured together at an oblique angle, and are centrally pivoted generally under the seat of the rider, with the apex of the oblique angle pointing downwardly and to the rear when the pedals are in their neutral position. In accordance with another important aspect of the invention, each of the pedal levers may be operated independently, and they are coupled by separate clutches to the rear hub of the bicycle. In accordance with another aspect of the invention the pedal levers are raised through the use of clips which engage the foot of the rider. These clips may, for example, be heel clips or members which engage the riders instep. To provide variable drive ratio, the rearwardly extending portion of each of the pedal levers carries a slider which may be locked in position and moved by remote controls operated by the rider with the pedal levers in any orientation. Under the control of a cable or cabl connected from the front of the bike to each individu slider , a locking element forming part of each of t sliders is first positively moved to unlock the slider, a then the sliders are moved longitudinally to change t speed ratio. In the implementation of the slider operation, t rearwardly extending portion of the pedal lever may inclu two side members, and an interconnecting transverse plat providing a beam of H-shaped cross-section, with t transverse plate forming a camming surface to release t slider from locking recesses in the pedal lever portio Other known beam cross-sections such as π T", "U", "I", "L or cross configuration may be used to provide the desir mechanical strength, locking recesses for the slider in t form of notches or holes in the beams, and camming surfac to unlock the slider. In accordance with an additional minor feature of t invention, the pedal levers are provided with forward mounted foot platforms which have a pivot point about 3 to inches forward from the rear of the rider's heel. In accordance with another different aspect of t invention, the distance from the pivot point of the ped lever to the pivot point of the pedal platform, or t radius of the pedal motion, is preferably about 11 to inches, which is approximately equal to the diameter betwe pedals of a conventional bike. The full stroke ot the n bicycle extends through an arc that is more than 60 degre and less than 120 degrees (and preferably in the order of degrees) so that the average efficiency is more than 90%. Another advantage involves the significant reducti in distance travelled by the foot in the present bicycle, contrasted with conventional bikes. Assuming a stroke fr top to bottom of 13 inches, for both a conventional bike a for the present oscillating pedal type bike having a ped radius (instead of diameter) equal to the same 13 inche the distance ' travelled by each foot in a conventional bi will be in the order of 50% greater than with the bike in accordance with the invention. Further, as noted above, the direct extension of the leg and the application of force - - onto the firm pedal platform results in much higher energy conversion efficiency than is obtained with rotary pedal action using toe engagement required for the smooth pedalling of conventional bikes. Accordingly, another aspect of the invention allows an effective use of a pedal to perform a cycle powering stroke which may vary from one up to 18 inches. The foregoing four factors deserve recapitulation: (1) The first involving the independence in operating the two pedals; (2) The second involving the cosine factor, (3) the third involving fifty percent more travel of the feet with the old style bikes, and (4) the fourth involving direct leg extension onto a firm extended pedal platform, as compared w=ith toe engagement with a narrow pedal in conventional bikes, when these four factors are taken togethe , the resultant bike even in the prototype stage has substantially superior performance characteristics to the best existing conventional bikes. In accordance with another feature of the invention, the motion of the rearwardly extending portion of the pedal lever assembly is confined to the space to the rear of the seat and away from the operating positions of the rider's legs and ankles to avoid possibility of injury to the rider, and for cleaner mechanical design. With regard to the configuration of the pedal lever, it serves to interconnect the driving point where the cabin is effectively connected, the pivot point for the pedal lever , and the pedal mounting point for the pedals or pedal platforms. While the pedal levers may assume various configurations, it is desirable that the three points form an oblique angle with the pivot point being the apex of the angle, and the angle pointing down and to the rear when the pedal lever is in an intermediate position. The oblique angle is preferable more than 145 degrees, and successful results have been obtained using an obl ique angle in order of 150 to 170 degrees . Add itional featur e s wh ich ar e d i scl osed in t continuation-in-part patent appl ication , but not in par en t appl ication , incl ud e the fol lowi 1. The forward portion of the pedal lever between pivot point and the pedal is bent to increase the leng th the stro ke and in one design to avoid inter ference with chain spr ing retractor . 2. The rearwardly extend ing portion of each of pedal levers may be of T-shaped or L-shaped configurati or other beam config urations of high mechanical strength low weight . 3. The retractor spring secured to the lower end the bicycle chain may be mounted at a point between pivot point of the pedal lever and the point of attachm of the pedal lever when it is at the lowest point of power stroke. 4. The slider mechanism for changing the bicycle g ratio may be controlled by a cable which is both shifted longitudinal position and also rotated, so that the sl movement and its locking may be independently controlled a single cable. 5. Each chain may be provided with quick rele arrangements both at its upper end where it engages movable slider on the pedal lever and also at its bottom e where it is secured to the constant force strip-type spri 6. The plane of each chain may be displaced inward toward the frame of the bike out of the plane of movement the pedal levers to permit greater flexibility in design. 7. Each chain retractor spring may be secured to forward portion of the pedal lever to provide a degree automatic tension adjustment as the chain is operated. In accordance with an important advantage of the n design, the length of stroke may be increased to close to inches, without interfering with the mounting of the cha retractor spring or otherwise interfering with good bicyc design requirements. Other objects, features, and advantages of the invention will become apparent from a consideration of the drawings and from the following detailed description. Brief Description of the Drawings Figure 1 is an overall diagrammatic view of a bicycle illustrating the principles of the present invention; Figure 2 is an enlarged side view of one pedal lever and associated apparatus used on the bike of Figure 1; Figure 3 shows an alternative arrangement for mounting the chain restoring spring for the present illustrative bicycle; Figure 4 and 5 are side and top views, respectively, of the rear portion of the pedal lever and the slider mechanism for changing the speed or power ratio of the bicycle; Figure 6 is an alternative speed changing arrangement; Figure 7 is a further alternative speed or ratio changing system; Figure 8 is a diagrammatic showing of the controls for unlocking the speed changing mechanism and for changing the position of the slider to change the speed ratio; Figure 9 shows an alternative slider actuation arrangement for changing speeds; Figures 10 and 11 are side and top views, respectively, of pedal platforms for supporting the feet at the front end of the pedal levers and heel clips associated with the pedal platforms; Figure 12 shows an alternative pedal lever platform and associated heel engagement arrangements; Figure 13 is a diagrammatic showing of arrangements for orienting the pedal platform relative to the pedal lever ; Figure 14 is a further alternative speed changing arrangement; Figure 15 shows a single cable speed changing arrangement; Figure 16 shows an alternative drive arrangement us belting instead of chains; Figure 17 shows an alternative arrangement in wh the driving belt is secured to the slider of the sp changing mechanism; Figure 18 shows one additional speed changi arrangement; Figure 19 is a cross-sectional view of the dual cl mechanism for supplying power from each of the two cha connected to the respective pedal levers to the rear wheel Figure 20 is a side view of an improved embodiment the invention; Figure 21 is a side view of one pedal lever which be utilized with the bicycle of Figure 2 Figure 22 is a partial cross-sectional view of t gear changing slider and its associated control mechanism; Figure 23 is a partial cross-sectional view tak along lines XXIII-XXIII of Figure 22; Figure 24 is a cross-sectional view of the contr mechanism employed for changing gears as shown in Figure 2 Figure 25 is a partial cross-sectional view tak along lines XXV- XXV of Figure 24; Figures 26 and 27 are top and side views of the qui release arrangements for the drive chain of the prese bicycle; Figure 28 is a schematic showing of the constant for metal strip type spring employed to tension the bicyc chain; Figure 29 is a top view of an alternative ge changing arrangement; Figure 30 is a side view of the construction shown Figure 29; Figure 31 is a partial view taken along lin XXXI-XXXI of Figure 30; Figure 32 is a side view of an alternative cyc configuration illustrating the principles of the prese invention; Figure 33 is a top view of an alternative slider and rear pedal member configuration for changing the effective gear ratio; Figure 34 is a partial cross-sectional view taken along lines XXXIV-XXXIV of Figure 33; Figure 35 is a partial cross-sectional view of the hand-operated mechanism for shifting the speed ratio of the bike of Figure 32; and Figure 36 is a side view of yet another embodiment of the invention. Detailed Description Referring more particularly to the drawings, Figure 1 shows an oscillating pedal type bicycle including a front wheel 12, a rear driving wheel 14, a frame 16 which happens to be in the form of a woman's type bike, and a seat 18. The bicycle is provided with two pedal levers 20 and 22, with the pedal lever 20 being on the near side of the bike, and pedal lever 22 being to far side of the bike frame, as shown in Figure 1. Pivotally mounted at the front of the pedal levers are the pedal platforms 24 and 26. These pedal platforms are arranged with the pivot point in the order of 4 to 5 inches forward the position of the heel of the rider in order to provide more direct power from the rider's leg onto the front end of the pedal levers, instead of the usual application of pressure by the toe of the rider onto the pedals. The pedal lever 20 and associated mechanism are better shown in Figure 2 of the drawings. More particularly, the pedal lever 20 includes a front pedal supporting member 28 and a rear power transmission member 30. These two members are fixedly secured together, and made an oblique angle with one another. The apex of this oblique angle points downwardly and to the rear. The oblique angle as shown is approximately equal to 150", but it is contemplated that it could extend from about 120° to about 170°. The centrally located pivot point 32 is located substantially intermediate the two members, and secures the pedal lever 20 to the frame OA I - of the bicycle. The pedal levers are provided with lo stops, including stop 29 as shown in Figure 1. This st the pedal platform about three to five inches above ground and provides a full range of arcuate movement for pedal levers of somewhat less than 90°. The rear wheel of the bicycle 14 is driven thro clutches which are included in the hub 34. The hub 34 be provided with two sprocket gears, one for each of chains 36 and 38 associated with the pedal levers 20 and respectively. In one embodiment of the invention, as shown in Fig 2, the chain 36 is secured to the end of the member 30 point 40. It extends over roller 42 on slider 44 which selectively locked in position at different points along length of the driving member 30 to determine the speed ratio of the bicycle. The other end 46 of the driving ch 36 is secured to the constant tension flat roll-type spr 48 which is mounted on drum 50, pivotally mounted on frame. Figure 3 shows a slightly modified version of arrangement shown in Figure 2, in which the constant tens spring 48 is mounted on the drum 32, and to the bicy frame at the point where the pedal lever 20 is pivoted. The details of the locking and release mechanism the slider 44 over which the chain 36 passes are disclo in Figures 4 and 5. More specifically, the chain normally exerts a force directed to the left as shown Figure 4. The member 30 is actually made up of two s plates 52 and 54 bridged by a transversely extending pl 56 upon which the roller 58 pivotally secured to the sli 44, rides. In Figures 4 and 5 two cables 60 and 62 shown with their outer coaxial sleeves secured to the pe lever member 30 by the bracket 64. The movable wire which slides within the outer housing 60 is actuated release the slider 44 from its normally locked position which the locking axle 68 is located within one of recesses 70. The release function is accomplished camming member 72 which ' pivots in the slider 44 at point 74. When tension is applied to the upper point 76 of the camming member 72, the rear of slider 44 is raised as the roller 78 presses against transversely extending plate 56. This action raises locking axle 68 out of the recesses 70 in plates 52 and 54 so that ' it is free for longitudinal movement. With regard to longitudinal movement of the slider 44, it is normally biased to the rear by the force of the chaim 36. On the other hand, the application of tension to cable 80 moves the slider 44 to the right, as shown in Figure 4, thereby reducing the amount of travel of the chain 36 for a given angular movement of the pedal lever member 30. On the other hand, when it is desired to go faster, and to increase the ratio of wheel rotation to angular movement of the pedal lever member 30, the slider 44 is shifted to the left, and the locking axle 68 is located in one of the outer sets of recesses 70 on the member 30. This movement to the left may be accomplished by operating the release cable 66 and then relaxing tension on the cable 80 so that the slider 44 will move to the left under the force provided by the chain 36. Referring now to Figure 6, an alternative slider 44' is riding on the pedal lever member 30'. The pedal lever member 30' is provided with recesses 70' which are slightly assymetric, to counteract the normal biasing force exerted by the chain 36 toward the rear of the member 30'. In practice, the position of the slider 44' is controlled by the cable 82 which is movable within the outer concentric cable housing 84, which has its lower end secured to the member 30' by the bracket 86. The position of the slider 44' is controlled by the camming and control member 88, pivoted at point 90 and having the camming member 92 rigidly secured to it. The pin at point 90 normally drops down into one of the recesses 70'. However, when tension is applied to the cable 82, the member 88 and its associated cam 92 turn counterclockwise to raise the right-hand side of slider 44*, and lifts the locking member at point 90 out of recess 70'. Further tension on cable 82 following engagement camming member 88 with stop 91 shifts the slider to t right to lower speed ratio. On the other hand, aft initial actuation, gradual release of cable 82 permits t movement of the slider 44' to the left, and it may notched along to higher speeds and higher gear ratios by t successive application of light tension to the cable 8 The spring 94 normally biases the member 88 in clockwi direction. Spring 96 normally pushes the slider 4 downwardly to insure engagement of the locking pin at poi 90 in one of the recesses 70', despite bouncing of t bicycle or other vibration. As shown in Figure 7, the arrangement of Figure 6 m be provided with an additional cable 98 having an inn actuating member 100 to provide separate movement contr for the slider 44' along the pedal lever member 30'. Und these conditions, the cable 84 may be mounted by bracket 1 to the movable slider 44', rather than to the arm 30' shown in Figure 6. Of course, the end of the out concentric sleeve 98 enclosing the tension member 100 secured to member 30' by bracket 104. Figure 8 shows a cable control drum assembly 1 mounted by bracket 108 to the front frame or to the hand bars of the bicycle where it may be easily reached by t rider. Initially, it may be noted that the arrangement Figure 8 is intended for association with the two cab arrangements shown in Figure 7. More specifically, no that the outer concentric housing 98 passes through brack 108, and is therefore rigidly held to the frame of t bicycle. In order to shift the position of the slider, moving the cable 100, the entire drum assembly 106 rotated on the bracket 108, by grasping the handle 11 Note that the release cable is mounted by bracket 112 on the drum assembly 106 to rotate with it. Accordingly, wh it is desired to unlock the slider mechanism, the small handle 114 is moved in the clockwise direction to app tension to cable 66 and raise the locking axle out of t ( - locking recess in arm 30'. Once the slider is unlocked, the speed or ratio of the bike may be changed by moving the position of the slider through the rotation of the drum assembly 106 under the control of handle 110. Of course, with some of the other alternative arrange¬ ments, slightly different cable actuating mechanisms would be required. It may also be noted that, either one or two of the assemblies 106 may be provided. More specifically, if it is always desired to actuate both pedals with precisely the same gear ratio, then a single assembly 106 may be provided, with the cables for both of the two sliders secured thereto. However, if a rider has one leg which is somewhat weaker than the other and wishes to have a different ratio, then it is quite practical to provide two drum assemblies so that one of the pedal lever members 30 may be adjusted to 'a high ratio while the other is at a somewhat lower ratio. Figure 9 shows another alternative method for unlocking and shifting the slider mechanism 44 on the rearwardly extending portion 30 of the pedal lever which is pivoted at 32. In the arrangement of Figure 9, the cable is provided in which the inner wire 116 and the outer concentric portion of the cable 118 move together in order to change the position of the slider 44, but the inner wire 116 is shifted relative to the outer concentric portion 118 in order to unlock the detente 120 from the recess 70 in which it is seated when in the locked position. More specifically, as in the case of certain of the earlier embodiments, the slider 44 is provided with the wheel 58 which rides on the cross plate 56, and the release mechanism 122 is pivoted about point 124 under the control of cable 116 to force field 126 into engagement with the plate 56 so that dentente 120 is raised out of any one of the recesses 70 in which is may be locked. Thereafter, the entire cable us and 116 is moved to permit the slider 44 to move along the rearwardly extending portion 30 of the pedal lever. This movement of slider 44 on number 30 may be either under OMPI , V.'iPO ^ the force of the chain 36, as described above, which wou move the slider to the left as shown in Figure 9, or rotation of a drum on which the cable 118 and wire 116 m be wrapped, to move it to the right as shown in Figure against the spring pressure on the spring 36. In practic the actuating mechanism for the concentric cables 116 a 118 of Figure 9 may be substantially as shown in Figure with the entire cable including the outer concentric porti 118 being secured in a manner similar to cable 60 as sho in Figure 8 to extend around and be actuated in its entire by the rotation of the drum 106, but with the lever 1 supplementally moving the inner cable 116 relative to t outer concentric portion 118 which is fixed to the drum (n the frame of the bicycle). Of course, with the arrangeme of Figure 9, the outer concentric portion 118 of the cab must move longitudinally, and rollers such as the external grooved roller 128 shown in Figure 9 are provided on t frame of the bicycle between the drum 106 end the pulley roller 128. Figure 10 is a schematic showing of one of the ped platforms 24 pivotally mounted at the front end of forward extending portion 28 of the pedal lever 20, as shown Figures 1 and 2. Referring again to Figure 10, the ped platform assembly 24 includes an underlying plate 132 whi is pivotally mounted to the forward pivot point 134 (s Figure 2) by bracket 136. Heel clips 138 are preferab provided for each of the pedal assemblies, such as assemb 24, and these may be. adjustably mounted to the underlyi plate 132 by the bracket 140 pivotally secured to t vertically extending member 142, which is in turn adjustab mounted to extend within the hollow lower support memb 144. The spring heel clips 138 may be adjusted to t proper size for the rider and then clamped in the prop position by the clamping mechanisms 146 and 148 which may of any suitable configuration. As previously mentioned, has been determined that the preferred way of raising t pedals and restoring them to their upper positions betwe strokes is through the use of heel clips secured to the heels, and by providing the motive power by the rider. This permits freedom of control by the rider without arbitrary constraint forced upon the rider by the mechanism of the bike. -- Other - oscillating pedal type bikes have provided restoring springs, or interconnecting mechanisms whereby the depressing of one pedal raises the other pedal; however, such arrangements have introduced unnecessary back or reverse pressure, or have unduly constrained the mode of operation of the bike. Accordingly, the inventor has determined that restoration under the control of the rider through the use of heel clips, such as those shown in Figures 10 and 11, are to be preferred. Figure 12 shows an alternative arrangement in which a special shoe is provided with a metal attachment 150 for engaging the slot 152 mounted at the rear of the pivoted pedal platform 154. As in the previous example, the pedal platform 154 is pivotally mounted on the forwardly extending portion 28 of the pedal lever. An additional bracket 156 is provided for engagement with the front left-hand side of the shoe 160. The arrangement of Figure 12 is primarily intended for racing bike users in which special shoes may be employe . Figure 13 is a diagrammatic showing of the mode of biasing or orienting the pedal platforms, such as pedal platform 24 mounted at the front end of the forwardly extending portion 28 of pedal lever 20 (see Figures 1 and 2). In Figure 13 a torsion spring 162 is employed to orient the pedal platform 24 relative to the pedal lever 28. More specifically, in the absence of the torsion spring 162, the high center of gravity of the pedal platform assembly 24 could turn it over so that a rider could not easily place his foot upon it. Accordingly, the orientation of the pedal platform assembly 24 relative to the end of the forwardly extending portion 28 of the pedal lever is determined by the torsion spring 162. One end of the torsion spring 162 extends through the opening 164 in the upwardly extending bracket 166 forming part of the pedal platform assembly The other end 168 of the torsion spring 162 may be inser into any one of a series of holes 170 in the end of pedal lever, so that the proper angular orientation of pedal platform assembly is obtained. In practice, inste of being located immediately between the pedal platfo assembly and the front end of the pedal lever , and taking the considerable amount of lateral space shown in Figure 1 the spring can be of greatly reduced extent, and may be the inner side of the front end of the pedal levers, wi the pivot rod 172 extending through to the left-hand side pedal lever portion 28, as shown in Figure 13, and bei rigidly secured to the pedal platform assembly 24. torsion spring could then be secured to the pivot rod 1 and hold it in the desired orientation relative to the ped lever. Figure 14 shows yet another arrangement for unlocki the slider 44 from the rearwardly extending pedal lev member 30 and shifting its longitudinal position. Mo specifically, in the arrangement of Figure 14, unlocking accomplished by the cable 176 which rotates the circul camming member 178 about the combined pivot point a locking rod 180. Figure 14 shows the locking rod 180 rais up out of the locking recesses 70, with the roller 1 riding on the transversely extending plate 56. With t slider 44 unlocked from the rearwardly extending member 3 the position of the slider 44 may be moved by actuation the cable 182 which is secured to the member 30. rotating the drum 106, as shown in Figure 8, with t release lever 114 depressed, the slider may be moved to t left or right to change the speed ratio of the bicycl Figure 14 is of interest in showing an arrangement in whi the speed ratio control cable 182 operates below the memb 30, while the release cable 176 operates above the memb 30. Figure 15 is of interest in showing an arrangement which a slider 184 is moved along the rearwardly extendi ' ^ member 30 by a single movable cable 186. In operation, the detente 70 is initially is raised up out of the recess 70.in which it is located, and then the slider 184 moves to the right as shown in Figure 15, to shift the detente 188 to the next subsequent locking recess 70. Further, when it is desired to shift the bicycle to a higher speed ratio, the cable 186 may be momentarily pulsed, and then released so that the detente 188 would move upward and to the left as shown in Figure 15 under the pressure of the chain 36. Figure 16 shows an alternative arrangement in which a flexible belt or cable 192 is employed instead of the chain 36 shown in other embodiments of the invention. The belt 192 is secured to and wraps around the hub 194 at the rear wheel of the bicycle. The hub 194 is coupled to the rear wheel by means of a roll type locking clutch with very little back play, as will be described below. The hub 194 is biased in on angular orientation by the spring return 196 which is indicated schematically in this figure. A flat constant force spring 198 is secured to the outer end of member 30 by bolt 200, and is pivotally mounted on the slider 44 to bias it toward the end of member 30. Cable or belt 202 is actuated to both unlock and move the slider 44 along the length of the member 30, as in earlier embodiments of the invention. Figure 17 shows another embodiment of the invention employing a drive belt, instead of a chain. The drive belt 186 is secured to the movable slider 44, which as shown is mounted near the outer end of the rearward extending portion 30 of the pedal lever. The constant force spring 198 is secured to the outer end of the member 30, and is rotatably mounted on the slider 44 at pivot point 206 to urge the slider 44 toward the outer end of member 30. Locking and unlocking of the slider 44 is accomplished by cable 208 in a manner discussed hereinabove in connection with other embodiments of the invention, and movement of the slider 44 along the length of member 30 is accomplished by the cable OMPI 210 . Figure 18 shows an alternative arrangement in whic single cable 214 performs both the unlocking and the cont function for moving a slider 216 in a rearwardly extend portion 218 of a pedal lever. In Figure 18, as shown, balls 220 extend outwardly into the locking recesses 222 member 218. When the cable 214 is tensioned and moved the right, the initial action is to compress spring 2 with element 226 moving to the right to engage the m portion of slider 216 which lies to the right of the mova member 226. When this occurs, the balls 220 move inwar to release the slider 216 so that it may move either to right under continued tension exerted on cable 214, or the left under the force of the chain or belt 228 secured the slider 216. Figure 19 shows the rear wheel hub assembly. M specifically, the wheel hub 232 supports the spokes which extend outwardly and are connected to the rim of wheel which carries the tire. The two outer sprockets and 238 receive the chains which are connected to rearwardly extending portions of the pedal levers 20 and as shown in Figure 1. Immediately within the sprockets and 238 are the roller clutches 240 and 242, respective which transmit torque on a unidirectional basis to the wh hub 232. Roller clutches perform a function similar t ratchet in that torque is transmitted in one direction, not in the other. However, roller clutches of modern des have virtually no lost motion and are virtua instantaneously put into operation upon reversal of moti Typical clutches which are suitable are disclosed Torrington Catalog No. RC-8. Mounted outside the clutch is a plastic washer 244, which is held in place by retaining ring 246. A similar washer and retaining ring located at the other end of the assembly. The frame of bicycle is mounted on the treaded surfaces 248 and 250, is held in place by the usual retaining nuts. The ot components shown in Figure 19 are generally conventional. In closing, certain features of the invention and their significance may be noted. First, as a result of the configuration of the rearwardly extending portions of the pedallevers, such as portion 30 of pedal lever 20, the driving chain 36 may be relatively short. More specifically, it is preferably in the order of 16 to 20 inches long for a 27 inch wheel, with a shorter range of lengths being appropriate for smaller bikes, or bicycles with a reduced range of speed ratios. This short length precludes the transverse vibrations which tend to plague the operation of bicycles having extended tension members. In addition, the inertia of the reciprocating chain assembly is held to a minimum in that the only other working part that moves back and forth with it is the sprocket gear on hub 34, the flat constant tension spring 48, and the lightweight coupling between spring 48 and the short bicycle type chain 36. Incidentally, the spring 48 has a tension of only about three and one-half pounds, and is preferably between two and one-half and five pounds. Another minor feature involves the provision of the vertical toe plates such as 156 on the inner side of the pedal platforms, to prevent inadvertent inward sliding of the front of the shoe into engagement with the frame of the bicycle. By way of transition, Figures 1 through 19 described hereinabove were included in my U. S. Patent Application 879,220, filed February 21, 1978, of which this patent application is a continuation-in-part. The following description of Figures 20 through 31 were not included in that prior patent application and represent an improved bicycle design. With reference to Figure 20, this bike is similar in many respects to that described hereinabove in connection with Figures 1 through 19. The bike includes the front wheel 302, the rear wheel 304, the seat 306, and the handlebars 308. The part of the bike which is of greater interest to us in connection with Figure 20 is that relating _0..Pi ■ fr to the drive mechanism, and specifically including the pedal levers, with the one in the foreground including front portion 310 and a rear portion 312, and the one in background including a front portion 314 and a rear port 316 which is nearly in the vertical orientation. Suita pedal platforms as described hereinabove are mounted on pedal levers at 318 and 320. Associated with the fr pedal lever, as shown in Figure 20, is the slider 322 wh may be moved along the rear portion 312 of the pedal le to change the effective gear ratio of the bike, the ch 324 which drives the bike, and the constant force spring which is secured to the other end of chain 324 and mounted at the point 328. The chain and spring associa with the rear pedal lever, as shown in Figure 20, is visible, but the two constant force springs are moun coaxially at a point 328 on either side of the frame rear wheel 304. A gear changing and locking control mechanism 332 provided with a handle 334, and the entire unit is moun conveniently on the bicycle frame. Figure 21 is an enlarged showing of one of the pe levers including the forward portion 310 and the rearwar extending portion 312, which has a central pivot jour 336. It may be noted that the forward portion 310 of pedal lever is bent up in the region 338. As shown Figure 20, this permits a longer stroke for the forw portion of the pedal lever without interfering with mounting point 328 for the constant force spring retract for the chain. Incidentally, the st structure 337 provides resilient material in the path both of the two pedal lever members 310 and 314, to s their downward travel, and to preclude their inpinge ent the ground. Figures 22 and 23 illustrate one gear changi arrangement for the bicycle of Figure 20. Mo specifically, the upper surface of the rearwardly extend portion 312 of one of the pedal levers is provided with ' B mi¬ series of notches or recesses 340 into which the slider 322 is secured by a detent 343, and held by cam 342. With the detent 343 and cam 342 oriented as shown in Figures 22 and 23, detent 343 engages one of the recesses 340, and prevents the slider assembly 322 from moving up or down the member 312. When it is desired to change gears, the cable 344 is rotated, and the cam 342 is moved out of engagement with the stop 346, thereby unlocking the detent 343 and permitting free longitudinal movement of the slider assembly 322 as a result of the angle between detent 343 and the end wall of recess 340, as a result of the longitudinal force on slider 322. Such longitudinal movement is accomplished by the action of the cable 344 as it is moved from left to right or vice versa as shown in Figure 22. The cable 344 is clamped by the clamping mechanism 348 onto the assembly 322, and more specifically in engagement with the rotating detent 342. This rotating detent 342 is in turn journalled within the opening 350 in the slider housing 322, and is retained in position by the heavy sheet metal bracket 352 which extends around the rear of the detent member 342. The upper end of the chain 324 (see Figure 20) is secured in the recess 356, so that it may be readily detached when the bike is to be disassembled or repaired. Incidentally, the bolts 358 hold the retaining bracket 352 in place. Figures 24 and 25 show the controls for the gear changing arrangements which appear in Figure 20 at reference numerals 332 and 334, with 334 indicating the handle. The handle 334 is pulled or pushed to control the longitudinal position of the rods 362 and 364 and their associated cables 344 and 366, respectively. Incidentally, the assembly 332 is secured to the frame by suitable brackets such as the bracket 368. The gear box 370, including the gear 372 secured to shaft 362, and the gear 374 secured to shaft 364 cause the shafts to rotate in opposite directions simultaneously, when the handle 334 is turned. As discussed above, this rotation of the handle 334, and the corresponding rotation of cables, including cable 344, rotates ' the cam 342 to bring the detent 343 (see Figure into engagement with one of the recesses 340 on the up surface of the number 312 so that the gear changing sli is locked in position. Of course, rotation of the han 334 in the opposite direction releases the detent 343 permits the changing of the effective gear ratio by longitudinal movement of the slider 322 when the handle 3 is pulled or pushed. Of course, prior to changing the g ratio by longitudinal movement of the handle 334, it m first be rotated to release the detent 343, as discus above. Incidentally, the outer housing 345 for cable 344 fixed at one end to assembly 332, and at the other end the rear portion of the pedal 312, see Fig 22. Figures 26 and 27 show top and side view respectively, of the chain 324 and the quick relea arrangements for securing the chain 324 to the slider 3 and the constant tension spring 326. More specifically, one end the chain is provided with a coupling member 3 which has a central width between pins 384 and 386 which close fit to slide between the members 388 and 390 slider 322 as shown in Figure 23. In addition, the pi 384 and 386 are sized to fit into the openings 356 in bo member 388 and 390. The constant tension strip spring 326 is provided wi a pair of clamping members 392 and 394 and a transverse extending pin 396 having an extension 398 which is direct toward the main portion of the spring 326. The chain 324 provided with an end member 402 having an opening 404 f receiving and engaging the pin 396. Accordingly, with t arrangements as shown in Figures 26, 27 and 22, the cha 324 may be released both from, the slider 322 and from t constant tension spring 326 in a matter of seconds. On t other hand, once the members are assembled, the tension the spring 326, and the close fit of the elements operation, prevent their inadvertent release. Figure 28 shows the arrangements for mounting the co stant tension spring 326 on the bicycle frame member 408, the position 328 which appears in Figure 20 of the drawings. The spring 326 is mounted in a spool shaped holder 410 which is freely rotatable on a mounting pin 412 which is adjustably secured into the opening 414 in the bicycle frame 408 by a set screw 416. The spring 418 maintains the housing 410 in engagement with the enlarged head 420 of the pin 412. Instead of the rearwardly extending portion of the pedal levers being of T-shaped configuration, as shown in Figures 21, 22 and 23, an open "H" type configuration may be employed as shown at 312' in Figures 29, 30 and 31. More specifically, the central portion of the rearwardly extending member 312', as shown in Figure 29, includes two side frame members 424 and 426, which are secured together, both at the their outer ends by element 428, and toward the pivot point 336 by the webbing 430. In operation, the slider arrangement of Figures 29 through 31 is similar to that of Figure 28 as disclosed hereinabove. More particularly, the cable 432 with its inner movable wire 434 serves to both move the slider longitudinally on the member 312' and also to selectively release the latching mechanism. In addition, the arrangements for operating the cable 432 would not be as shown in connection with Figures 24 and 25 of the drawings, but would be as described hereinabove in connection with Figures 8 and 9. The outer concentric portion of the cable 432 is secured to the main body of the slider 436. The inner wire 434 is secured to the cam actuator lever 438 which turns the shaft 440 about its axis when the central wire 434 is moved longitudinally relative to the outer concentric cable member 432. Secured to the shaft 440 to rotate with it are two cam members 442, which bear on the inwardly extending rails 444 secured to the side members 424 and 426 of the pedal lever portion 312'. The roller 446 also rides on the inwardly extending rails 444. When the bike is "in gear" and the slider 312' is firmly secured to the rearwardly extending pedal lever portion 312' , the rounded portion of the shaft , A. 440 which overlies the upper scalloped edges of the supp members 424 and 426, is fitted firmly into one of recesses 448 in the upper edge of each of the beams 424 426. However, when the wire 434 is actuated, the rele lever 438 is moved relative to the main portion of slider body 436, and the rear portion 452 of the sli assembly 436 is raised. When the rear of the slider pivots upwardly about the roller 446 under the action of cams 442, the shaft 440 is raised up out of the reces 448, and the entire slider assembly 436 is free to be mo longitudinally on the pedal lever member 312' when entire cable 432 is shifted axially in one direction or other. Concerning other arrangements shown in Figures through 31, the chain 324 is secured to the member 450 wh is pivotally mounted for free rotation on the center of shaft 440. Spring elements 452 are mounted on a pin 454 bias the slider assembly 436 counterclockwise about roller 446 to maintain the shaft 440 in engagement with recesses 448 when the cams 442 are not operated. With regard to Figure 32 of the drawings, the bicy includes the same basic front and rear wheels 302 and 3 seat or saddle 306, and handlebars 308 as in pr embodiments. However, the frame including the main verti support 470, and the angular bracing members 472, 474, 4 and 478, are arranged to provide additional strength support at the pivot point 480 for the pedal leve including the front portion 482 and the rear portion 484. resilient stop of 486 is firmly secured to the frame, limits the downward movement of each of the pedal levers engagement with the front member 482. Of course, independently movable pedal lever, not visible in Figure is mounted to pivot about the same pivot point 480. practice, as mentioned elsewhere in this application, two pedal levers may be operated either synchronously alternately; therefore, the other pedal lever may oriented precisely behind that shown in the foreground Fig ure 32 . Mounted on the rearwardly extending portion 484 of the pedal lever is a slider 488 which is movable along the length of the member 484 to change the effective gear ratio of -the bicycle. As- in the case of earlier embodiments of the invention, the chain 324 extends over the sprocket 490, and the free end of the chain is secured to a takeup constant tension strip spring 326 mounted at point 328 on the bicycle frame. The construction of the hub of 490 and other portions of the bicycle not disclosed in detail herein, is as described in connection with earlier figures of the drawings. Figure 33 is a top view of the rearwardly extending portion 484 of the pedal level, together with a more detailed showing of the configuration of the slider 488 which is mounted on member 484. The slider 488 is provided with a detent 494 which may be locked into any of the recesses 496 in member 484 to hold the slider 488 in its proper position along the length of he member 484, thereby determining the lever arm through which force is applied to the chain 324 to drive the bike. In practice, as shown to advantage in Figure 34, the detent 494 is selectively held in place in one of the recesses for 496 by the cam 498 which is rotated with the rotation of the control cable 344, in the manner described hereinabove for cam 342, in connection with Figures 22 and 23 of the drawings. When the cam 498 is rotated to its inactive position, the detent member 494 is pivoted to rotate about point 502 (see Figure 33), and longitudinal pressure on the slider 488 will cause the detent 494 to pop out of the recesses 496 to permit changing of the effective gear ratio of the bike. When the slider 488 has been shifted to a new position, the cable 344 will be rotated so that the detent 494 is held into its new position in another recess 496 by the cam 498. It may be noted that the chain 324 may be secured to the slider 488 as shown in Figure 34 so that plane of the chain is not aligned with the plane of movement of the 'BθRt " _4^ OMPI > VV.PO , portions 484 and 482 of the pedal lever. Using th arrangement, the spring 326 need not be aligned with t forwardly extending portion 482 of the pedal lever, and m be mounted at point 328 inside the path of travel of t front portion 482 of the pedal lever so that the pedal lev may swing past the constant tension spring mounting poi 328. One arrangement for moving the two cabl longitudinally, and for rotating both of the two cables f the two pedal levers concurrently Was shown in Figures and 25. Another arrangement which may be us interchangeably with that of Figures 24 and 25 is shown Figure 35. In Figure 35 the two cables 362 and 364 a shown secured to gears 372 and 374 as in the case of Figur 24 and 25. However, instead of a handle such as that sho at 334 in Figures 24 and 25, the gear 372 and its associat cable 362 may be rotated by the rack 506 to which a hand 508 is provided for engagement by the fingers o'f the bi rider. The opposing fixed member 510 provides a go location for engagement by the thumb, when the rack 506 moved vertically as the handle 508 is moved u Incidentally, the spring 512 normally exerts a downwa force on the rack 506, biasing the cables 362 and 364 in t proper orientation to lock the cams, including cam 498 their locking positions. When the rack 506 is moved up, t detent 498 is released, and the position of the slider 48 and the corresponding slider on the other pedal lever, m be shifted by longitudinal movement of the cable members 3 and 364 in their housing 332. The foregoing mode operation is, as noted above, substantially as describ hereinabove for the mechanical arrangements of Figures and 25; however, the location of the unit in Figure 32 mak for easier operation by the bike rider. Finally, Figure 36 shows a single speed bike having pedal lever including a forward portion 522 and a rearward extending portion 524. The bike is generally configur along the lines of that shown in Figure 32, but the cha 324 is fixedly secured at point 526 to the rear end of pedal lever portion 524, and through the short extension spring 526 to a point 528 on the forwardly extending portion 522 of the pedal lever. With the movement of the front portion of the pedal lever 522 compensating to some extent for the upward movement of the chain secured to the point 526 on the rearwardly extending portion 524 of the pedal lever, a simple short extension spring 526 with limited extensibility, is adequate to maintain appropriate tension on the chain. In place of the heel clips shown on the pedal platforms in earlier figures of the present drawings, the pedal platform 532 may be provided with a clip 534 which extends over the instep of the rider, to both permit easy raising of the pedal by the rider, and also to permit free and easy disengagement of the foot from the pedal when it is desired to dismount, or the like. It is again noted that the bent configuration of the forwardly extending portions 310 of the pedal lever provides significant advantages. More particularly, with the arrangement as shown in Figure 20 and subsequent more detailed showings, the total travel of the pedals may be in the order of 18-1/2 inches, using a 12 inch radius between the pivot point 336, as shown in Figure 20, and the point of attachment of the pedal assembly 318. Further, in the representative showing of Figure 20, the angle is nearly 90 degrees, with the starting point being in the order of 37 degrees above the horizontal and the final position being in the order of 50 degrees below the horizontal. It is also noted that this relatively long stroke, and its greater extent below the horizontal as compared with a stroke having equal portions above and below the horizontal, conforms more closely to the natural force producing movement of a human leg, and in this connection follows the movement of the leg in walking or running, and is therefore more efficient than a path which has equal arcuate portions above and below the horizontal. It is also noted that, with a reciprocating movement, the path from the top to the ' bottom of the fo stroke may be somewhat longer than in the case conventional bikes in which a circular motion of the pe is required. The independent articulation of the two pedal le assemblies is again emphasized. This permits gre flexibility and freedom of movement in supplying power the bike. For example, the two pedal levers may be mo together; a single pedal only may be operated; in turning corner the inner pedal lever may be operated with sh strokes while the outer lever is operated through a f stroke; persons with reduced mobility of one leg can t full strokes with one leg, and partial stroke with other; etc. etc. Such freedom of operation not o facilitates high speed competitive operation of the bicyc but also makes pleasure riding much more enjoyable. As collateral advantage and benefit, the number of parts in cycle may be reduced, and the cost of the cycle reduced. In conclusion, it is to be understood that t mechanical arrangements as described hereinabove a illustrative of the principles of the invention. It is al noted that the various alternative mechanical arrangeme shown and described in connection with the bike of Figure could be used with the bike of Figure 20, and vice vers Other alternative mechanical arrangements may be employed implement the general principles as outlined herein. specific example but not of limitation, instead of t angled configuration shown for the front portion of t pedal levers, they may be smoothly curved from the piv point to the point of attachment of the pedal platform Also, the present invention is applicable to cycl generally, to tricyles as well as bicycles, and fourwheeled pedal actuated cycles. All such alternativ are considered to be within the spirit and scope of t invention.

Claims: The embodiment of the invention in which an exclusive property or privilege is claimed are defined as follows: 1. An efficient oscillating pedal type cycle comprising: a cycle having a frame, front and rear wheels, and a seat; a pair of pedal levers each having a front member and a rear member rigidly connected together, and having an intermediate pivot point substantially where said two members join; pedal means mounted near the front end of each of said front members of said pedal levers; chain means having one end coupled to the rear member of each of said pedal levers at a driving point to drive the rear wheel of said cycle; means connected to the other end of said chain means for maintaining said chain means under tension; the angle including said pivot point of said pedal levers as an apex and extending from said driving point on the rear member to the mounting point for said pedal means on the front member, being an oblique angle, directed downward and to the rear when said pedal levers are in an intermediate position; and means for mounting each said pedal lever on said frame with said pivot point located generally under said seat with the apex of said oblique angle extending generally downward and to the rear when the pedal lever is in an interemdiate position; means for providing oscillating motion for said pedal means in a circular arc having a radius between 10 and 16 inches with a rotation about said pivot point of between approximately sixty and ninety degrees; means for providing a range of movement for said rearwardly extending portion of said pedal lever to a point near and above the hub of said rear wheel at its most rearward point of oscillation, and to a point approaching the vertical in its most forward point of oscillation but not into the zone in front of the seat where the rider legs or ankles could be contacted; and each said pedal lever having its front member be between its pivot point and the mounting point for sa pedal means, to permit a longer, more efficient ped stroke. 2. An efficient oscillating pedal type cycle defined in claim 1 wherein said front member is bent intermediate said pivot point and said pedal mounting poin 3. An oscillating pedal type cycle as defined claim 2, wherein each spring means is mounted between t axis of said rear wheel and the lower end of the path said pedal means, whereby the bent configuration of sa pedal lever permits a longer pedal stroke witho interference with said spring means. 4. An oscillating pedal type cycle as defined claim 1 further comprising: means for changing the speed • ratio of said cycle changing the effective connected point of said chain mea along the length of said rearwardly extending members said pedal levers, said speed changing means including slider mounted on each of said rearwardly extending membe of said pedal levers, and means for securely locking sa sliders in place on said pedal levers; and cable means connected to each of said sliders f remotely unlocking said sliders and shifting their positio to change speed ratios. 5. An oscillating pedal type cycle as defined claim 4 wherein said rearwardly extending members of sa pedal levers are of substantially T-shaped cross-section. 6. An oscillating pedal type cycle as defined claim 4 wherein means are provided for moving, said cab means both longitudinally and rotationally, for shifting a locking said sliders, respectively. 7. An efficient oscillating pedal type cycle defined in claim 1 wherein said front pedal member located principally above the line between said pivot poi and said pedal mounting point. 8. An efficient oscillating pedal type cycle as defined in claim 1 wherein said front pedal member is located principally below the line between said pivot point and said pedal mounting point. 9. An efficient oscillating pedal type cycle as defined in claim 1 including means for mounting said pedal levers for operation wholly independent of one-another. 10. An efficient oscillating pedal type cycle as defined in claim 1 further comprising means secured to each of said pedal means for engaging the feet of a rider to raise the front member of said pedal levers to the upper position. 11. An efficient oscillating pedal type cycle comprising: a cycle having a frame, front and rear wheels, and a seat; a pair of pedal levers each having a front member and • a rear member rigidly connected together, and having an intermediate pivot point substantially where" said two members join; pedal means mounted near the front end of each of said front members of said pedal levers; chain means having one end coupled to the rear member of each of said pedal levers at a driving point to drive the rear wheel of said cycle; means connected to the other end of said chain means for maintaining said chain means under tension; the angle including said pivot point of said pedal levers as an apex and extending from said driving point on the rear member to the mounting point for said pedal means on the front member, being an oblique angle, directed downward and to the rear when said pedal levers are in an intermediate position. 12. An efficient oscillating pedal type cycle as defined in claim 11 including means for mounting said pedal levers for operation wholly independent of one-another. OMPI WlPO 13. An efficient oscillating pedal type cycle defined in claim 11 wherein each said pedal lever has i front member bent between its pivot point and the mounti point for said pedal means to permit a longer, mo efficient stroke. 14. An efficient, oscillating pedal type cycle defined in claim 11 wherein the length of the front porti of each said pedal lever is to be from 10 and 16 inches. 15. An efficient oscillating pedal type cycle defined in claim 11 further comprising stop means f limiting the travel of each said pedal lever. 16. An efficient oscillating pedal type cycle defined in claim 11 further comprising means secured to ea of said pedal means for engaging the feet of a rider raise the front member of said pedal levers to the upp portion. 17. An oscillating pedal type cycle comprising: front and rear wheels, a seat, and an interconnecti frame; a pair of pedal levers, each of said pedal leve being pivoted about a pivot point located generally bel the seat, and having a forwardly extending portion and rearwardly extending portion securely fastened to sa forwardly extending portion; means for providing oscillating motion for sa forwardly extending portion through a full range of moveme in a circular arc having a radius between 10 and 16 inch with a rotation about said pivot point of betwe approximately sixty and approximately one hundred and twen degrees; means for providing a range of movement for sa rearwardly extending portion to a point near and above t hub of said rear wheel at its most rearward point oscillation, and to a point approaching the vertical in i most forward point of oscillation; and means for driving said rear wheel from the t rearwardly extending portions of said two oscillating ped lever s . 18. A versatile oscillating pedal type cycle comprising : a cycle having a frame, front and rear wheels, and a seat; means including a pair of pedal levers each having a predetermined range of movement for applying power to drive said cycle; and said cycle including means for mounting said pedal levers for operation wholly independent of one-another , whereby said pedals may be operated with different length strokes, or together, or alternatively with equal length strokes. 19. A versatile oscillating pedal type cycle as defined in claim 18 wherein said pedal levers each have a front member and a rear member rigidly connected together, and have an intermediate pivot point substantially where said two members join; and further comprising: pedal means mounted near the front end of each of said front members of said pedal levers; chain means having one end coupled to the rear member of each of said pedal levers at a driving point to drive the rear wheel of said cycle; means connected to the other end of said chain means for maintaining said chain means under tension; the angle including said pivot point of said pedal levers as an apex and extending from said driving point on the rear member to the mounting point for said pedal means on the front member, being an oblique angle, directed downward and to the rear when said pedal levers are in an intermediate position. 20. An oscillating pedal type cycle as defined in claim 11 further comprising: means for changing the speed ratio of said cycle by changing the effective connected point of said chain means along the length of said rearwardly extending members of said pedal levers, said speed changing means including a slider mounted on each of said rearwardly extending members of said pedal levers, and means for securely locking said sliders in place on said pedal levers; and cable means connected to each of said sliders for remotel unlocking said sliders and shifting their positions to change speed ratios. 21. A cycle as defined in claim 20 including means for rotating each of said cable means to unlock said sliders, and for moving each of said cable means along its length to change speed ratios. 22. A cycle as defined in claim 11 wherein said means ' for maintaining said chain means under tension is a spring connected between the end of each chain and the front member of each of the associated pedal levers. 23. A cycle as defined in claim 11 wherein quick release means are provided at each end of said chain for disconnecting said chain from said cycle. 24. i\ versatile oscillating pedal type cycle comprising: a cycle having a frame, front and rear wheels, and a seat; means including a pair of pedal levers each having a predetermined range of movement for applying power to d~ive said cycle; said cycle including means for mounting said pedal levers for operation wholly independent of one-another, whereby said pedals may be operated with different length strokes, or together, or alternatively with equal length strokes, and with the pedal raising motion at a different speed than the power stroke; pedal means secured to the front of said pedal levers for engagement by the feet for drivinq said bicycle; and • *♦ means for. the -high speed restoring of the front of said pedal levers to their upper positions, including means associated with each pedal means for engaging the foot or shoe of the rider, said restoring means including means for permit¬ ting unconstrained outward lateral movement of the feet, whereby the safety of the cycle rider is enhanced. 25. A versatile oscillating pedal type cycle comprising: a cycle having a frame, front and rear wheels, and a seat; means including a pair of pedal levers each having a predetermined range of movement for applying power to drive said cycle; said cycle including means for mounting said pedal levers for operation .wholly independent of one-another, whereby said pedals may be operated with different length strokes, or together, or alternatively with equal length strokes, and with the pedal raising motion at a different speed than the power stroke; pedal means secured to the front of said pedal levers for engagement by the feet for driving said bicycle; means for resiliently orienting said pedal means to a desired position relative to the front of the pedal levers; and means for the high speed restoring of the front of said pedal levers to their upper positions, including means associ¬ ated with each pedal means for engaging the foot or shoe of the rider.

Inventors: EFROS B
Applicants: ENERGENIC PROPULSIONS LTD
Application year: 1980
Main classification: B62M1
IPC codes: B62M1