SPEED MECHANISM FOR SCREW DRIVER
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
N/A
Issued Date -
Dec 19, 2013
app pub date -
Jun 14, 2012
filing date -
Jun 14, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A screw driver includes a body having a ratchet unit and a first transmission rod extends through the ratchet unit. The first transmission rod has a ratchet gear and a switch member is connected to the ratchet unit to control the operation status of the ratchet gear. The first transmission rod has a tube connected to a first end thereof and a non-circular connection portion is connected to a second end of the first transmission rod. A handle is connected to the body and has a toothed ring located therein. The toothed ring is engaged with a planet gear unit which is engaged with a sun gear mounted to a second transmission rod which has an accommodating portion. The accommodating portion is engaged with the connection portion. The individual first and second transmission rods do not generate resistance when the screw driver operates the objects at high speed.
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