Drive apparatus (2) for a cycle (4), comprising an electric motor (6), a first pulley (8) driven by electric motor (6), a second pulley (10), an endless belt (12) which passes around two pulleys (8, 10) and is driven by first pulley (8), and a swinging link mounting (14). During use, endless belt (1
Drive apparatus (2) for a cycle (4), comprising an electric motor (6), a first pulley (8) driven by electric motor (6), a second pulley (10), an endless belt (12) which passes around two pulleys (8, 10) and is driven by first pulley (8), and a swinging link mounting (14). During use, endless belt (12) is in driving engagement with a tire (16) of a wheel (18). Mounting (14) enables the distance between centers of first and second pulleys (8, 10) and tire (16) to vary during use of drive apparatus (2), which enables drive apparatus (2) to exert on tire (16) a varying contact pressure which increases as transmitted torque increases. Mounting (14) comprises an attachment for attaching drive apparatus (2) to cycle (4), and a pivot (24). Drive apparatus (2) is characterised by electric motor (6), pulleys (8, 10) and endless belt (12) forming a transmission which is counter-balanced about pivot (24) such that in an equilibrium position, endless belt (12) is not in contact with tire (16) when drive apparatus (2) is not in use.
대표청구항▼
1. Drive apparatus for a cycle, which drive apparatus comprises an electric motor, a first pulley which is driven by the electric motor, a second pulley, an endless belt which passes around the two pulleys and which is driven by the first pulley, and mounting means for mounting the drive apparatus t
1. Drive apparatus for a cycle, which drive apparatus comprises an electric motor, a first pulley which is driven by the electric motor, a second pulley, an endless belt which passes around the two pulleys and which is driven by the first pulley, and mounting means for mounting the drive apparatus to the cycle, the drive apparatus being such that during use the endless belt is in driving engagement with a tire of a wheel of the cycle, the mounting means being such that it is a swinging link mounting means which enables the distance between centers of the first and the second pulleys and the tire to vary during use of the drive apparatus and thereby to enable the drive apparatus to exert on the tire a varying contact pressure which increases as transmitted torque increases, the swinging link mounting means comprising attachment means for attaching the drive apparatus to a cycle and pivot means about which the electric motor, the first pulley, the second pulley and the endless belt pivot, and the drive apparatus being characterised in that the electric motor, the first pulley, the second pulley and the endless belt form transmission means which is counter-balanced about the pivot means such that in an equilibrium position the endless belt is not in contact with the tire when the drive apparatus is not in use.
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이 특허에 인용된 특허 (13)
Felt Robert M. (2800 Virginia Billings MT 59102), Auxiliary engine assembly for a bicycle.
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