Abstract:
A propulsion system of a lever propelled bicycle that utilizes a right and left side assembly consisting of two sets of linear chain links with an offset connection to one another by a spacer means, wherein each assembly is able by said spacer connection means to wrap around separate radial drive members at least 1¾ revolutions without wrapping around itself, therefore providing the rotational pulling means of it&#39;s connected radial drive member with a propulsion that is consistent in range and torque. The propulsion system also provides means of rewrapping each chain assembly around its radial drive member for reciprocal rotational pulling action by alternate levers when a rider applies force to each pedal.

Description:
[0001]    This application is a Continuation-In-Part application of Ser. No. 61/401,360, currently pending filed on Aug. 11, 2010. 
     
    
     BACKGROUND OF THE INVENTION 
       [0002]    1. Field of Invention 
         [0003]    This invention relates to the propulsion system&#39;s of lever propelled bicycles. 
         [0004]    2. Background of the Invention 
         [0005]    In the bicycle industry, there are the alternative types of bicycles that are propelled by lever machines, which pivots back and forth, instead of in the conventional manner of the rotational of crank arms. What the Lever Enhanced Pedaling System (LEPS) has to offer is low pedaling resistance. Low pedaling resistance occurs when there is no significant upward force from the bicycles pedaling components, resulting in an increase in torque while pedaling this type of bicycle. The upward force from a conventional bicycle comes from the crank arm being in the 90 degree or near vertical position, resulting in the area of applied force (pedals) coming closer to the fulcrum (crank axle) horizontally distance wise. Thus, the closer the area of applied force is to the fulcrum, the greater the effort there must be to propel the bicycle forward. So one may experience a fluctuation of pedaling force when pedaling a conventional bicycle, after noticing that when the forward pedal of the bicycle is pressed downward while in its 180 degree or near horizontal position, pedaling torque increases. This is because the area of applied force is the most furthest away from the fulcrum. The LEPS, however, maintains its area of applied force at a distance from its fulcrum, that is more constant or in a near linear path ( FIG. 2 ) while the pedals are being pressed downwards. This linear path is not exactly linear, but slightly curved. This curved path is sufficient enough to maintain a near constant level of torque while pedaling this bicycle. This constant level of torque establishes a mechanical advantage that is above that of all conventional bicycles using a rotational pedaling configuration. 
         [0006]    Mechanical advantage is not limited to just torque per pedal, but also must include range to torque ratio. In order for a pedaling system to have more mechanical advantage, it must have more torque with equal amount or more pedaling range than the conventional bicycle. This is why the LEPS has adopted a propulsion system with a roller chain that is configured to pull the rear wheel drive component into rotation around the smallest diameter possible. The essential part of this rear wheel drive component that the roller chain pulls is a cylinder  14  ( FIG. 4  &amp;  FIG. 6 ) or drive cylinder, which is closely occupied by the axle  18  of the rear wheel. Thus, the sprocket was omitted from this mechanism, because it would reduce the pedaling range of the bicycle due to the nature of its large diameter. This means that the roller chain  2  would rotate the cylinder  14  around the axle  18  of the rear wheel, after it was wrapped around said cylinder ( FIG. 6 ), which would rotate the rear wheel connected to the cylinder. 
         [0007]    Experiments were conducted on such a mechanism, which resulted in a sufficient amount of pedaling range, but then a problem remained which had to be solved. When the chain  2  wrapped the cylinder  14  and itself, torque would increase as well as the diameter of the chain&#39;s circular position, generating an uneven amount of torque. Thus, a new chain arrangement was invented in order to prevent the chain from wrapping around itself, while facilitating the chain  2  wrapping around the drive cylinder  14  at least 1¾ times. This 134 wrap around chain configuration allowed for 1¾ wheel revolutions per pedal, which exceeds performance standards for single speed bicycles. In order for this wrap around chain system  2  to actually work, it would be essential to cut the length of the chain  28  to or near to the circumference of the drive cylinder  14  so it could be wrapped around the drive cylinder  14 , while the ends of the chain  28  are almost touching each other. The first end of this chain  28  would have its first chain bore occupied by a steel rod  32 , which would be used to fastened this end of the chain to a radial drive disk  24  connected to the drive cylinder  14  by the welding process. Then, the second portion of the chain  30 , which continues to wrap around the drive cylinder  14  would be offset in connection to the former chain portion  28 . This offset connection would be at the last chain link bore of the first chain  28  mentioned and the first chain link bore of the second chain  30 . Both bores would be aligned with a spacer  34  between them the latter&#39;s bore aligned as well. Then a steel rod  48  would occupy these bores and be used to fastened the assembly  2  together ( FIG. 5B ). The spacer  34  would act as a means to prevent the roller chain pins ( 28  &amp;  30 ) from colliding with each other while the chain  2  is being wrapped adjacently around the drive cylinder  14 . The other end of the second chain member  30  would be connected to the lever machine  46 , around the load point  4  and this load would be pulled in a rearward direction. The LEPS&#39;s lever machine  46  and reciprocal system  56  has a mechanical design that would make the LEPS wrap around chain propulsion system original and produce new mechanized results due to such an arrangement. For example, the component in U.S. Pat. No. 4,574,649 awarded to Seol has a cable  7  that moves through the grooves of pulley wheels  13  and each end of the cable is attached to a separate roller chain. The LEPS has a cable  8  that moves through four pulley wheels ( 10  &amp;  22 ) and each end is directly connected to a radial drive member  26  as well as it&#39;s member drive cylinder  14 , but not separate roller chains  28 . Furthermore, each roller chain  28  is connected to a separate radial drive member  24  that are welded to member drive cylinders  14 . This new arrangement results in a drive radius that is smaller than most lever propelled bicycles in its field and this smaller drive radius allows each roller chain assembly  2  to rotate the connected rear wheel at more revolutions per pedal than if a sprocket was used. Each reciprocal cable  8  pulls and rotates it&#39;s connected drive cylinder  14 , while reeling in it&#39;s member roller chain assembly  2 . 
         [0008]    Another feature that distinguishes the LEPS from Soel&#39;s invention is the length of the lever machine  46 . The LEPS has the area of applied force (pedals)  42  distance to the load (roller chain connection)  4  more than twice the distance than the load is to the fulcrum in its highest gear and this is why such a mechanized configuration will have more mechanical advantage. Other different features include a reciprocal cable system  56  that moves inside the bicycle&#39;s frame  40  instead of on the outside of it. Furthermore, the way the roller chain  30  is connected to the load bolt  4  on its member lever machine  46  is different than the prior art. The chain  30  is partially wrapped around the load bolt  4 , while partially overlapping it self ( FIG. 5A ) in order to adjust tension on the chain  30  after calibrating the reciprocal cable system  56  connected to the drive cylinder  14 . Each reciprocal cable end  8  is designed to alternately wrap its member transmission chain assembly  2  while it is being pulled. After tension in the reciprocal cable  8  is established, tension in the roller chain must be established by wrapping the roller chain  2  around the drive cylinder  14  that is not wrapped with the reciprocal cable  8 . Then tension on the roller chain  2  should be established by pulling the roller chain  30  around the load bolt  4  until it is tight and bolting the overlap of the chain  30  to its longer portion by inserting bolts  16  ( FIG. 5A ) in aligned chain link spaces. This connection must then be fastened in place with nuts. The other side of the reciprocal cable  8  should be wrapped around the drive cylinder  14 , but the roller chain  2  should be unwrapped around member drive cylinder  14  and tension on this roller chain  2  should be established like the former mentioned roller chain. The reason why tension on the cable  8  and roller chains  2  are important is because tension on such components will allow maximum forward travel per pedal when they engage the drive cylinder  14  or when a rider pedals the bicycle. 
         [0009]    The Propulsion mechanism for lever propelled bicycles (U.S. Pat. No. 4,630,839) awarded to Seol has many differences when compared to the LEPS&#39;s chain wrap around system that would establish the latter system as original offering novel results. The device invented by Seol has separate transmission chains the pull it&#39;s radial drive member in a forward direction in contrast to the LEPS&#39;s system, which pulls its radial drive member in a rearward direction. The rearward pull system gives its lever machine more design options, because it lever machine  46  can be lengthened beyond the axle  18  of the rear wheel. This design option allows the LEPS&#39;s lever machine  46  to be stretched rearward to increase mechanical advantage without compromising standard wheel base length or ergonomic pedal position. Further differences between the former mentioned invention and the LEPS is the position of propulsion chain engagement. The chain of the former invention has two propulsion chains that engage symmetrical radial members ( 12  and  12   a ,  FIG. 2 ) that are connected by the same axle. This chain engagement is close to either pedal when a pedal is in its peak position. This position may be close enough to snag the hem of a rider&#39;s pants if it were caught in this engagement. The propulsion chain engagement of the LEPS is within the rear tube of its frame  40 , thus making it free from entangling a rider&#39;s clothes. 
         [0010]    The Lever driven bicycle (U.S. Pat. No. 5,988,662) awarded to Staehlin has various distinctions when compared to the LEPS&#39;s system that makes the latter new and unique. The Lever driven bicycle has its fulcrum on the axle of the rear wheel, while the fulcrum  44  of the LEPS is connected to the frame  40  of the bicycle behind the axle  18  of the rear wheel. Having a fulcrum  44  connected to the rear frame  40  has the advantage of easy rear wheel removal for maintenance purposes. After the axle  18  of the LEPS is removed from the rear wheel, the rear wheel can be dropped out for repairs. The Lever driven bicycle would be difficult to repair because the rear reciprocal system would be attached to its lever machine, while the axle is connected to the bore of each symmetrical lever machine composing the fulcrum. Because the axle of the rear wheel is directly and indirectly connected to the frame of this lever propulsion system, is why it would be very difficult to remove this wheel for maintenance. This is why the LEPS&#39;s wrap around chain propulsion system will have an advantage over such a system. Furthermore, the reciprocal system of the Lever driven bicycle is too close to the fulcrum. This closeness would generate multiplied pressure from the effort spread out from the longer rigid mass of material composing the lever machine leading the fulcrum. Thus, this pressure may cause the components of the reciprocal system to break down earlier than components of the average bike. The LEPS has a reciprocal system  56  that is further away from its member fulcrum  44 , thus the system would last longer. 
       BACKGROUND OF INVENTION 
     Objects and Advantages 
       [0011]    Accordingly, besides the functional advantages of the LEPS with wrap around propulsion system, various benefits of the present invention include:
   (a) a bicycle that is lighter due to more efficient lever machines, lighter components and frame; as well as   (b) A bicycle that has more durable transmission components.   
 
       SUMMARY 
       [0014]    As expressed in the former paragraphs the LEPS with wrap around chain propulsion system is a new efficiently configuration that allows the rider to pedal the bicycle with more travel distance per pedal, while increasing the torque of the bicycle due to its lighter frame components. 
     
    
     
       DRAWING 
       Figures 
         [0015]      FIG. 1  illustrates a right side view of the wrap around chain propulsion system in its preferred embodiment. 
           [0016]      FIG. 2  illustrates an enlarged right side cut off view of the wrap around chain propulsion system. 
           [0017]      FIG. 3  illustrates an enlarged right side cut off view of the wrap around chain propulsion system with broken away views that illustrate the mechanical workings of the propulsion system. 
           [0018]      FIG. 4  illustrates an enlarged left side cut off view of the wrap around chain propulsion system with broken away views that illustrate the mechanical workings of the propulsion system. 
           [0019]      FIG. 5A  illustrates an enlarged right side view of the wrap around chain propulsion system&#39;s essential mechanical components, which further illustrates the position of the transmission chain  2  before it is wrapped around the drive cylinder  14  and after its pedal is completely pressed down. 
           [0020]      FIG. 5B  illustrates the top view of the transmission chain  2 , drive cylinder  14 , drive disk  24  and reciprocal disk  26  within the tube  40  of the frame. 
           [0021]      FIG. 5C  illustrates an enlarged left side view of the wrap around chain propulsion system&#39;s essential mechanical components, which further illustrates the position of the transmission chain  2  before it rotates forwardly the rear wheel coupled to drive cylinder  14  it is wrapped around. From the picture, it is obvious that by pulling the drive cylinder  14  counter clockwise the reciprocal steel cable  8  connected to it would be reeled around it, thus pulling the opposite end of the steel cable  8  connected to the drive cylinder  14  on the right side which causes it to pull its member chain around its member drive cylinder  14  with rotational force. 
           [0022]      FIG. 5D  illustrates the top view of the left side transmission chain  2  which shows how the leading chain  28  and longer chain  30  are not conflicting with each other after the chain assembly  2  is wrapped around the drive cylinder  14  within the tube of frame  40 . It also shows how the steel cable  8  is wrapped around the drive cylinder  14  on the right side of the reciprocal disk  26 . It also illustrates the beveled corner  64  of the drive cylinder  14 , which is designed to facilitate the easy wrapping around of the chains  2  around the drive cylinder, by preventing the chain pins from conflicting with the drive disk  24 . 
           [0023]      FIG. 6  illustrates the transmission chain systems  2 , modified hub systems ( 54  &amp;  60 ), rear wheel axle  18 , rotational bars  52 , and reciprocal system  56  and how these systems work together to produce reciprocal motion in order to forwardly propel the connected bicycle forward. 
           [0024]      FIG. 6  A illustrates how the rear wheel (including  54 ,  58 , &amp;  60 ) is removed from the transmission system. It also illustrates how the steel modified strip ( 36  &amp;  38 ) is assembled around the pulley wheels in order to prevent the steel cable  8  from falling out of member pulley wheels ( 10  &amp;  22 ). 
           [0025]      FIG. 7  illustrates the top view of the bicycle with cut off tubular frame  40  and seat post wings for a better view. 
           [0026]      FIG. 8  illustrates the top view of the bicycle cut open with cut off frontal frame  40  in order to reveal how the mechanism components work with each other while pedaling the bicycle. 
       
    
    
       [0027]      
         [0000]    
       
         
               
             
               
               
             
           
               
                   
               
               
                 DRAWINGS—Reference Numerals 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 2 
                 wrap around chain assembly 
               
               
                 4 
                 load bolt 
               
               
                 6 
                 horizontal pulley wheel bolt 
               
               
                 8 
                 steel reciprocal cable 
               
               
                 10 
                 horizontal pulley wheel 
               
               
                 12 
                 horizontal pulley wheel bolt 
               
               
                 13 
                 horizontal pulley wheel nut 
               
               
                 14 
                 radial drive cylinder 
               
               
                 16 
                 roller chain fasteners 
               
               
                 18 
                 rear wheel axle 
               
               
                 20 
                 vertical nut 
               
               
                 22 
                 vertical pulley wheel 
               
               
                 24 
                 radial chain drive disk 
               
               
                 26 
                 radial cable drive disk 
               
               
                 28 
                 leading offset chain 
               
               
                 30 
                 larger offset chain 
               
               
                 32 
                 chain drive connection means 
               
               
                 34 
                 chain spacer 
               
               
                 36 
                 vertical cable holder 
               
               
                 38 
                 horizontal cable holder 
               
               
                 40 
                 bicycle frame 
               
               
                 42 
                 pedal 
               
               
                 44 
                 fulcrum 
               
               
                 46 
                 lever machine 
               
               
                 48 
                 offset connection means 
               
               
                 50 
                 parallel lever plates 
               
               
                 51 
                 C-holder component 
               
               
                 52 
                 rotational steel bars 
               
               
                 54 
                 steel hub 
               
               
                 56 
                 reciprocal system 
               
               
                 58 
                 freestyle sprocket 
               
               
                 60 
                 rear wheel hub 
               
               
                 62 
                 outward force acting on transmission chain 
               
               
                 64 
                 beveled edge 
               
               
                 66 
                 slot for pulley wheel 
               
               
                 68 
                 aerodynamic tip 
               
               
                 70 
                 steel pin 
               
               
                 72 
                 bolt support 
               
               
                 74 
                 steel reinforcement 
               
               
                 76 
                 pedal mount 
               
               
                 78 
                 tube of lever 
               
               
                 80 
                 bore of pedal mount 
               
               
                 82 
                 bore of aerodynamic tip 
               
               
                 84 
                 groove of aerodynamic tip 
               
               
                 86 
                 bore of the lever 
               
               
                 88 
                 bore of steel reinforcement 
               
               
                 90 
                 leading bore of steel reinforcement 
               
               
                 92 
                 bevel of pedal mount 
               
               
                 94 
                 bore accommodation for load 
               
               
                 96 
                 bore accommodation for fulcrum 
               
               
                 98 
                 pedal bolt 
               
               
                 100 
                 pedal nut 
               
               
                 102 
                 load nut 
               
               
                 103 
                 piston rod 
               
               
                 104 
                 fulcrum nut 
               
               
                 105 
                 slots of the modified hub 
               
               
                   
               
             
          
         
       
     
       DETAILED DESCRIPTION 
     FIGS.  1  to  5   
       [0028]    Herein are descriptions and definitions of the concept drawings depicting the preferred embodiment of the LEPS&#39;s wrap around chain propulsion mechanism, which is illustrated in  FIGS. 1 through 8 .  FIG. 1  illustrates a right side view of the vehicle body that structurally accommodates the wrap around chain  2  propulsion system. The roller chain  30  of said right assembly is looped around the load bolt  4  occupying the bores of parallel vertical plates  50  composing the “L” shaped levers  46 . This loop allows the top rear portion of the larger chain  30  to be overlapped by its smaller portion, while the chain link spaces are aligned. At least three aligned spaces are occupied by a bolt and fastened by separate nuts  16  ( FIG. 5 ). The larger portion of each roller chain  30  lead forward, then a smaller offset roller chain  28  is connected to the leading end of the former chain portion  30  from the side that is facing away from the rear wheel. The smaller offset roller chain  28  length is just short of the circumference length of the drive cylinder  14 . This is necessary so that the ends of the shorter chain  28  do not collide with each other while it is being wrapped around the drive cylinder  14 . Furthermore, the other connected larger portion of the roller chain  30  continues to wrap around the drive cylinder  14  after the smaller roller chain  28  is fully wrapped around the drive cylinder  14 . This chain assembly  2  allows for a transmission means that wraps around the drive cylinder  14  at least 1 and ¾ times without chain  2  conflict Between the offset connections is a spacer  34  that prevent the chain pins from colliding with each other. The ends of the larger chain  30  and shorter chain  28  is connected by a steel rod  48  that occupy the bores of the aligned chain ends ( 28  &amp;  30 ) and spacer  34 . The ends of the steel rod  48  is held in place by a connected nail head and it&#39;s opposite end that is bent to at least a 90 degree angle ( FIG. 5B ). 
         [0029]    The frontal bores of the shorter chain  28  end is aligned to the bore in the radial drive disk  24  while a steel rod  32  occupies both of them. This assembly is held in place by bending the end of the rod to at least 90 degrees while the other end is held by its nail head. The radial disk  24  has a central bore which is occupied by the drive cylinder  14 . The outer bore edge of the drive disk  24  is welded to the outer corner of the drive disk  24  and contacting drive cylinder  14 . Across from the drive disk  24  inward toward the rear wheel is the reciprocal disk  26  having an outer central bore edge that is welded to the outer surface of the drive cylinder  14  comprising the corner of the drive cylinder  14  and reciprocal disk  26 . The reciprocal disk  26  has three bores close to the surface of the drive cylinder  14 . These bores would accommodate one end of the reciprocal steel cable  8 , which is about 1/16″ in diameter. The bores are about ⅛″ in diameter in order to have space for J.B. Weld resin, which would permanently bond the steel cable  8  within the holes, thus preventing slipping. Furthermore, the second assembly technique which would prevent the steel cable  8  from slipping would be how the steel cable  8  is woven back and forth through each hole ( FIG. 6 ). This weaving of the steel cable  8  through the three bores would reinforce the J.B. Weld resin bonding the steel cable  8 . As illustrated in  FIG. 6 , the right side roller chain system  2  and reciprocal cable  8  assembly shows the leading end of the roller chain  28  unwrapped around the drive cylinder  14 , while it is coupled underneath it, while it&#39;s adjacent reciprocal cable  8  member is wrapped around the drive cylinder  14  clockwise from a right side view. The reciprocal steel cable  8  on the right is configured to pull counter clockwise the drive cylinder  14 , which would then pull and wrap counter clockwise it&#39;s member transmission chain  2 . The left side assembly is symmetrical to the right side assembly, however the left side reciprocal cable  8  would wrap around its member drive cylinder  14  counter clockwise ( FIG. 5 ) from a left side view and the reciprocal steel cable  8  is configured to pull clockwise the drive cylinder  14 , which would rewrap clockwise, it&#39;s adjacent member transmission chain  2  ( FIG. 5 ). The steel reciprocal cable  8  is connected to both symmetrical assemblies. From the right assembly it comes from being wrapped around its member drive cylinder  14 , then it leads up and around forwardly into the vertical groove of its pulley wheel member  22 . The steel cable  8  then leads forwardly and around to the left in the horizontal groove of its pulley wheel member  10 . The steel cable  8  then lead to the left out of the right symmetrical side of the frame ( FIG. 7 ) into to left symmetrical side of the frame  40  into a slot in the inner side of the frame  40  into a horizontal groove of member pulley wheel  10  ( FIG. 7 ). The steel cable  8  then leads around to the left and then rearward in the groove of a member vertical pulley wheel  22 . The cable  8  then leads over and downward to connect to its member drive disk  24  while being positioned in front of and underneath its member drive cylinder  14 . Each pulley wheel ( 10  &amp;  22 ) is connected within the frame of the bicycle by a bolt and nut ( FIG. 7 ). Each pulley has an almost “U” shaped strip of metal ( 36  &amp;  38 ) that is formed around the groove of each pulley wheel. Near the edge of these “U” shaped strips ( 36  &amp;  38 ) of metal are bores through the surface of their parallel portions that are aligned and enable the said bolts ( 6  &amp;  12 ) to be inserted into them as well as the bore of the pulley wheels ( 10  &amp;  22 ). This assembly prevents the steel cable  8  from falling out of the groove of the pulley wheels ( 10  &amp;  22 ). Consequently, this assembly maintains a reduction of friction on the movement of the steel cable  8  within the frame  40  of the bicycle. Furthermore, each vertical pulley wheel is sustained by a member bolt  6  through the bore of the pulley wheel  22  and frame  40 . Said bolt  6  occupies aligned bores through the vertical surfaces of the frame&#39;s  40  tubular joint corner through the center of each tubular joint. The end of each bolt  6  faces inward towards the rear wheel and is fastened with a nut  20  ( FIG. 8 ). Each horizontal pulley wheel  10  is partially out of the frame  40  ( FIGS. 6 &amp; 7 ) surface facing inwards. Each pulley wheel  10  protrudes through a slot through the side of said surfaces. Above and below each slot is a bore that is aligned to the other. Said bolt  12  occupies the align bores in the frame  40  and each member pulley wheel  10 , which both pulley wheels are fastened in place with a nut  13 . 
         [0030]    The load bolt  4  is the component, in which the drive chain  2  is looped around. The load bolt  4  occupies the aligned bores  94  ( FIG. 9 ) that are through the parallel plates of the “L” shaped lever  50 . Each load bolt  4  is ⅜″ in diameter, which is enough steel thickness to prevent it from bending from the multiplied pulling tension generated by the force of member lever machines  46 . The end of each load bolt  4  points inwards towards the rear wheel of the LEPS. Each end is fastened in place with a nut  102 . The load bolt  4  represents the load, which is a basic component of a lever machine, which includes three other elements, the lever, the area of applied force and the fulcrum. The load bolt  4  is positioned on each lever machine  46  more than twice the distance away from the area of applied force (pedal  42 ) than it is to its member fulcrum  44  component. This lever component configuration complies with the definition of a lever machine having true mechanical advantage. 
         [0031]    Furthermore, a rotational steel beam  52  is welded to the inner facing edges of each drive cylinder  14 . The rotational steel beams  52  are supposed to be rotated forwards and backwards in a reciprocal motion. Thus, when the rider presses on the L-shaped lever and pulls the transmission chain  2 , the rotational bar  52  is rotated forward while the steel cable  8  is reeled in and pulls the opposite side drive cylinder  14  which reels in its member transmission chain  2  and pulls the drive cylinder  14  in a backwards rotation. When the opposite lever machine from the first mentioned one is pressed downwards, the same reaction takes place, but with the opposite drive cylinder  14  and transmission chain  2  ( FIG. 6 ). Furthermore, the rear wheel connected to the modified hub ( 54  &amp;  60 ) is able to be dropped out easily simply by removing the axle  18  of the rear wheel as illustrated in  FIG. 6A . Once the axle is removed the open ended slots  105  must be aligned so that all four are allowing either rotational beams  52  to point upwards or 90 degrees. The rear wheel with the connected modified hub ( 54  &amp;  60 ) is to be slid downward ( FIG. 6A ) until the wheel is free of the frame  40 . This should be done after the rear breaks are loosened to allow the tire to pass through. This type of rear wheel release would allow for easy maintenance of the rear wheel. 
       Operational Description FIGS. 1-8 
       [0032]    The manner of how the LEPS&#39;s wrap around chain propulsion system works can be illustrated in  FIGS. 1 to 8 . When the rider presses down on the pedal  42 , the portion of the drive chain that is wrapped around its member drive cylinder  14  pulls the drive disk  24  and drive cylinder  14  in a circular forward motion while at the same time reeling in the steel cable  8  adjacently connected to the reciprocal disk  26 . This steel cable  8  is also in contact with the drive cylinder  14  and it is reeled in around the drive cylinder  14  as the drive chain  2  is unwrapped due its rearward pulling by its member lever machine  46 . The inner end of the drive cylinder  14 , facing the rear wheel, connected to the perpendicular bar of steel  52  rotates forwardly the steel hub  54  connected to member freestyle sprocket  58 . The freestyle sprocket  58  rotates forwardly the hub  60  connected to the rear wheel, which propels the bicycle forward. The reeling in of the steel cable  8  produces a strong pulling force on the cable  8 , which causes the cable portion on the opposite symmetrical side of the frame  40  to be pulled and unreeled. It further causes the drive chain  2  connected to the drive disk  24  to be wrapped around it&#39;s member drive cylinder  14 , by pulling said drive cylinder  14  in a circular motion that wraps the drive chain  2  around it&#39;s member drive cylinder  14 . After the drive chain  2  around said drive cylinder  14  is fully wrapped, the propulsion process as firstly described is set in the same motion when its member pedal  42  is depressed by a rider&#39;s foot. 
       Other Mechanical Reactions 
       [0033]    When a drive chain  2  is pulled by it&#39;s member lever machine  46 , the portions of shorter chain links  28  that are rearward want to swing outward  62  ( FIG. 5B ), but these links are steadily held in place by the wall of it&#39;s member drive disk  24 , as well as the rigid ness of it&#39;s chain link formation and the steel rod  32  that connects the first chain link bore to the drive disk  24 . Furthermore, the inner edge of the member drive disk  24  would have a beveled edge  64  ( FIG. 5B ) for allowing the outer surfaces of the short leading chain portion  28  to slide against the inner surface of it member drive disk  24  without it&#39;s chain link pins conflicting with the inner edges of the member drive disk  24 . This ability of the shorter leading chain portion  28  to significantly stay straight while multiplied force is pulling on it, would also allow the larger connected offset chain  40  portions to also maintain a straight position in reference to its parallel lever  46  components.