Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural drive ratios other than unity
Patent
1991-07-05
1992-08-25
Wright, Dirk
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural drive ratios other than unity
475318, 475320, F16H 344
Patent
active
051414767
ABSTRACT:
Disclosed is a two-way-driven 3-speed free wheel which provides a multi-gear-changing mechanism for use with various kinds of pedal cycles. The disclosed device has four kinds of catches: pawl, hook-pawl, backward pawl and forward pawl. The backward and forward pawls respectively are hinged on the opposed sides of a sprocket wheel by small spindles mounted on the opposed sides of the sprocket wheel. On one side of the sprocket wheel are the backward pawls and an outer ring; on the other side are forward pawls, a ratchet cone and a bearing collar. Between the outer ring and a central gear are two or more planet pinions. As compared with prior art structures, this invention has the following advantages: the structure is simple, the cost is lower, and it is facile to operate and to change speed. Also disclosed are one-way-driven 2-speed free wheels and two-way-driven 2-speed free wheels, using two or three kinds of catches, of the above-described four kinds of catches.
REFERENCES:
patent: 4240533 (1980-12-01), Fukui
patent: 4628769 (1986-12-01), Nagano
patent: 4727965 (1988-03-01), Zach et al.
Lam S. W.
Wright Dirk
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