Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Condition responsive
Patent
1979-04-23
1981-06-30
Herrmann, Allan D.
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
Condition responsive
74336B, 74337, 192 4892, F16H 554, F16H 1100, F16D 4704
Patent
active
042760372
ABSTRACT:
A drive mechanism having drive and driven shafts for automatically providing increased torque when the loading on the driven shaft is increased beyond a predetermined limit, for example upon start-up of a loaded conveyor. The shafts are interconnected by a pair of sprockets and chain drive assemblies of differing ratios. Under normal loading the output shaft is driven through a friction clutch by the sprocket and chain drive assembly providing the highest output speed. Under heavy loading, the friction clutch begins slipping and a one-way clutch is activated to drive the output shaft through the lower speed sprocket and chain drive assembly.
REFERENCES:
patent: 541040 (1895-06-01), Crandall
patent: 2187835 (1940-01-01), Martin
patent: 2230293 (1941-02-01), Harris
patent: 2463100 (1949-03-01), Gredell
patent: 2694937 (1950-09-01), Birbaum
patent: 2772576 (1955-01-01), Ross
patent: 2809535 (1957-10-01), Hein et al.
Parker Jimmy J.
Ryan Edward C.
Deere & Company
Herrmann Allan D.
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