B - Operations – Transporting – 62 – M
Patent
B - Operations, Transporting
62
M
B62M 23/02 (2010.01)
Patent
CA 2310974
One of the major barriers to the daily use of a bicycle for work/home commuting purposes has always been steep climbs. An innovative chain strain sensing device that controls an interface to allow installation of a wide selection of existing cordless power tools into a derailleur bicycle power train is proposed here. The chain tension applied by the rider is sensed by a mechanical device that has the capability of following all chain lateral positions that are imposed by the rear (or front) derailleur shifter. The tension signal is then directly sent to the power tool trigger through a control cable. The result is that the power tool motor is activated only when extra power is required by the rider. Unlike all other existing electric bike boosters having a throttle controlled manually, the main benefit of this concept is to maximize the autonomy of the motor batteries as boost is provided only when the rider pedals. The complete system is so light weight (under 12 lb) and so compact that the rider can still enjoy the regular behavior (including the gear shifting capability) and feeling of the bicycle when riding on shallow rates, flat road portions or downhill.
Na
Routier Thierry
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