Chainless bicycle drive mechanism

Machine element or mechanism – Gearing – Directly cooperating gears

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

280236, F16H 112, B62M 900

Patent

active

040056112

ABSTRACT:
A chainless drive mechanism for a bicycle using a rotatable drive shaft for transferring the pedal actuated driving force from the pedal crankshaft to the rear wheel including shift mechanisms to provide different drive ratios. A pair of discs, each formed with a plurality of concentric series of openings, are mounted on the pedal crankshaft and rear wheel, respectively. A pair of spaced sprocket gears is rotatably mounted on each end of the drive shaft and engaged with a respective series of disc openings. A pair of axially movable ratchet slip gears is fixed against rotation on each end of the drive shaft adjacent a similar ratchet surface formed on each of the sprocket gears. A pair of operator controlled individual shift brackets is movably mounted on the drive shaft, each being operatively engageable with a respective pair of ratchet slip gears. Axial movement of the shift brackets along the drive shaft selectively intermeshes one of the ratchet gears with the ratchet surface of its respective sprocket gear to drivingly connect the front disc with the rear disc through the drive shaft and selected ratchet and slip gears upon rotation of the pedal crankshaft. The intermeshing gears on the rear wheel, slip automatically upon stopping or slowing down of the rotation of the pedal crankshaft and drive shaft, permitting continued rotation of the rear wheel during coasting of the bicycle. Spring means bias return the selected rear wheel ratchet gear into intermeshing driving engagement upon resumption of rotation of the pedal crankshaft.

REFERENCES:
patent: 628614 (1899-07-01), Smallwood
patent: 2561960 (1951-07-01), Weaver
patent: 2780110 (1957-02-01), Kopa
patent: 3782210 (1974-01-01), Holleman
patent: 3872736 (1975-03-01), Houvouras
patent: 3934481 (1976-01-01), Foster

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Chainless bicycle drive mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chainless bicycle drive mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chainless bicycle drive mechanism will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1086386

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.