Patent ID: 6155584
Filing Date: 2000-12-05
Classification: B62K,B62M

Abstract:
A cycle, comprising:a longitudinal chassis provided, toward one end, with a seat provided with a backrest and, toward an opposite end, with a system of independent pedals adapted to be actuated with the legs of a user in a seated position with the user's back supported by the backrest, said pedal system being associated with transmission means connecting said pedal system to a drive shaft, adapted to transform the movement of said pedal system into a movement of rotation about said drive shaft,said pedal system comprising two pedals connected to said chassis by first actuating means for givingsaid pedals an alternating movement of translation, said transmission means comprising, for each of said pedals, a first rotatable unidirectional transmission member associated with first resilient return means, carried by said drive shaft and connected to said first actuating means by a connection element adapted to drive in rotation said rotatable member and said drive shaft, upon displacement of said pedals in a direction away from said seat;at least one rear driven wheel provided with an axle having a free wheel connected by a chain to at least one plate secured to said drive shaft, and a front wheel provided with an axle mounted on a fork secured to a steering column;two independent handlebars adapted to be actuated manually, connected to said chassis by second actuating means adapted to permit giving said handlebars an alternating movement of translation, said second actuating means of each of said handlebars being connected to a second rotatable unidirectional transmission element associated with second resilient return means and carried by said drive shaft, by a connection element adapted to drive in rotation said rotatable member and said drive shaft, upon displacements of said handlebar in a direction away from the seat,two handles articulated each respectively toward the upper end of the handlebars, so as to be able to pivot about a longitudinal axis, said handles being connected to a manipulating bar secured to said steering column by means of connection elements adapted to cause the rotation of said manipulating bar and said steering column about a vertical axis,said first and second actuating means comprising, for each of said pedals and each of said handlebars, a carriage mounted slidably along said chassis,resilient end-of-path elements disposed so as to serve as abutments for said carriages in a position nearest said seat,wherein each of said first and second rotatable unidirectional transmission members has a substantially ovoidal shape, and is mounted eccentrically on said drive shaft such that the length of the lever arm between the axis of rotation of said drive shaft and the longitudinal axis of the force exerted on the respective one of said first and second activating means will be inversely proportional to the distance separating the respective ones of said pedals and said handlebars from the seat.