Food-drying device with automatic gear-shift drive mechanism, and related coupling device
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United States of America Patent
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Apr 11, 2017
Grant Date -
Jul 18, 2013
app pub date -
Apr 17, 2012
filing date -
Jan 16, 2012
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Abstract
The current invention provides an automatic gear-shift drive mechanism including a first gear system having a first gear ratio, and a second gear system having a second gear ratio, wherein the first gear ratio is higher than the second gear ratio, and is biased to spin the drying assembly with the first gear system when the automatic gear-shift drive mechanism is driven and the workload is below a threshold workload, and switch to spin the drying assembly with the first and the second gear systems when the automatic gear-shift drive mechanism is driven and the workload is at or above the threshold workload.
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