Chainless drive mechanism

A chainless drive mechanism for a bicycle, comprising:

• an annular forward inboard casing being adapted for fixed coupling to a central portion of a frame of the bicycle, said forward inboard casing having an aperture centrally extending therethrough;
• an annular forward outboard casing being coupled to said forward inboard casing, said forward outboard casing having an aperture centrally extending therethrough;
• an annular forward gear wheel being rotatably positioned between said forward inboard casing and said forward outboard casing, said forward gear wheel having a plurality of concentrically geared rings on a side thereof facing said forward inboard casing;
• a forward bevel gear being rotatably disposed between said forward gear wheel and said forward inboard casing, said forward bevel gear engaging one of said geared rings of said forward gear wheel;
• a pedal axle being extended through said apertures of said casings and being fixedly coupled to said forward gear wheel, wherein said pedal axle is operatively coupled to a pair of pedals;
• a drive shaft means being rotatably coupled to said forward inboard casing, said drive shaft means having a toothed portion being positioned towards an end thereof, said bevel gear engaging said toothed portion of said, said drive shaft means being adapted for rotating a rear wheel of the bicycle;
• an annular rearward inboard casing, an annular rearward outboard casing, an annular rearward gear wheel and a rearward bevel gear, said annular rearward inboard casing being adapted for fixed coupling to a rear portion of the frame of the bicycle, said annular rearward outboard casing being coupled to said rearward inboard casing, said rearward inboard and outboard casings each having an aperture centrally extending therethrough, said annular rearward gear wheel being rotatably positioned between said rearward inboard casing and said rearward outboard casing, said rearward gear wheel having a plurality of concentrically geared rings on a side thereof facing said rearward inboard casing, said rearward gear wheel being operatively coupled to the rear wheel of the bicycle, said rearward bevel gear being rotatably disposed between said rearward gear wheel and said rearward inboard casing, said rearward bevel gear engaging said geared rings of said rearward gear wheel, said rearward bevel gear engaging a second toothed end of said drive shaft means;
• a rearward bevel gear actuator assembly for adjustably positioning said rearward bevel gear between said aperture and an outer perimeter of said rearward gear wheel such that said bevel gear engages different geared rings as rearward bevel gear moves between said aperture and said outer perimeter of said rearward gear wheel, said rearward bevel gear actuator having a gear adjusting member and an outer coupling member, said gear adjusting member being rotatably coupled to said rearward bevel gear and being slidably coupled to said rearward inboard casing, said outer coupling member being positioned adjacent an outer surface of said rearward inboard casing and being coupled to said gear adjusting member;
• and
• wherein said drive shaft means has a forward tension spring being extended around said second toothed portion of said drive shaft means, said rearward tension spring being for biasing said gear adjusting member towards said aperture of said rearward inboard casing.

A chainless drive mechanism for a bicycle, comprising:

• an annular forward inboard casing being adapted for fixed coupling to a central portion of a frame of the bicycle, said forward inboard casing having an aperture centrally extending therethrough;
• an annular forward outboard casing being coupled to said forward inboard casing, said forward outboard casing having an aperture centrally extending therethrough;
• an annular forward gear wheel being rotatably positioned between said forward inboard casing and said forward outboard casing, said forward gear wheel having a plurality of concentrically geared rings on a side thereof facing said forward inboard casing;
• a forward bevel gear being rotatably disposed between said forward gear wheel and said forward inboard casing, said forward bevel gear engaging one of said geared rings of said forward gear wheel;
• a pedal axle being extended through said apertures of said casings and being fixedly coupled to said forward gear wheel, wherein said pedal axle is operatively coupled to a pair of pedals;
• a drive shaft means being rotatably coupled to said forward inboard casing, said drive shaft means having a toothed portion being positioned towards an end thereof, said bevel gear engaging said toothed portion of said, said drive shaft means being adapted for rotating a rear wheel of the bicycle;
• an annular rearward inboard casing, an annular rearward outboard casing, an annular rearward gear wheel and a rearward bevel gear, said annular rearward inboard casing being adapted for fixed coupling to a rear portion of the frame of the bicycle, said annular rearward outboard casing being coupled to said rearward inboard casing, said rearward inboard and outboard casings each having an aperture centrally extending therethrough, said annular rearward gear wheel being rotatably positioned between said rearward inboard casing and said rearward outboard casing, said rearward gear wheel having a plurality of concentrically geared rings on a side thereof facing said rearward inboard casing, said rearward gear wheel being operatively coupled to the rear wheel of the bicycle, said rearward bevel gear being rotatably disposed between said rearward gear wheel and said rearward inboard casing, said rearward bevel gear engaging said geared rings of said rearward gear wheel, said rearward bevel gear engaging a second toothed end of said drive shaft means;
• and
• wherein said drive shaft means comprises a forward drive shaft and a rearward drive shaft being coupled to said forward drive shaft by a universal joint, said rearward bevel gear engaging a toothed portion of said second drive shaft.