Two-speed drive system for motor-driven appliances
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United States of America Patent
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Aug 13, 2013
Grant Date -
Mar 22, 2012
app pub date -
Feb 11, 2011
filing date -
Sep 21, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
There is disclosed a mechanical two-speed drive system/gearbox for household appliances such as a blender or food processor. The gearbox comprises a motor, a motor shaft, a drive-outlet, and the installation of one-way bearings in suitable places in the gear-train. The drive-outlet can be driven at two different speeds in the same rotational direction. By operating the motor in the clockwise direction and counter-clockwise direction, a change in the drive-outlet rpm is achieved. When operating in the hi-speed mode, the drive-outlet is directly driven by the motor. When operating in the lo-speed mode, the drive-outlet is driven via the gear-train, with a resulting increase in torque. This gearbox is simple to construct, and operable without expensive control electronics. In particular applications with electronic motor speed and directional control, a much broader and useable drive-outlet speed range is achieved.
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