Output shaft locking device
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United States of America Patent
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-
Apr 6, 2004
Grant Date -
N/A
app pub date -
May 8, 2003
filing date -
May 8, 2003
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An output shaft locking device includes a hollow frame through which an output shaft extends. The output shaft has a polygonal end which is connected to a driving device. A locking device includes a fixed ring received in an underside of the hollow frame and an inner ring is rotatably received in the fixed ring. A first polygonal hole is defined through the inner ring and recesses are defined in an underside of the inner ring. The driving device has a driving disk and a second polygonal hole is defined through the driving disk so that the polygonal end of the output shaft engages the two polygonal holes. A plurality of protrusions is formed on a top of the driving disk and matches the recesses in the underside of the inner ring. Gaps are defined between the polygonal end and the two polygonal holes. When the driving device does not provide power to the output shaft, the output shaft is locked by the locking device.
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