Gear assembly for transportation tools
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United States of America Patent
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-
N/A
Issued Date -
Jan 27, 2011
app pub date -
Jul 22, 2009
filing date -
Jul 22, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A gear assembly includes a ring gear mounted to a body and a pawl biased by a spring is engaged with ratchet teeth in the inner periphery of the ring gear. A control lever is fixed to an end of the pawl by a link so as to disengage the pawl from the ratchet teeth by rotating the control lever. A shaft extends through the body and is fixed to a driving gear. The ring gear is connected with a wheel of the transportation tool. A coil spring is connected between the shaft and the body to provide a force to return the body. The driving gear is driven by a transmission device of the transportation tool and the driving gear drives the ring gear to rotate the wheel forward. The wheel can be rotated backward by operation of the control lever to disengage the pawl from the ratchet teeth.
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