Screwdriver
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United States of America Patent
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-
N/A
Issued Date -
May 9, 2013
app pub date -
Nov 3, 2011
filing date -
Nov 3, 2011
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A screwdriver-used torque transmission apparatus includes a frame including a slot, an aperture and four cavities. The slot is in communication with the aperture and cavities. A gear includes a non-circular aperture axially defined therein, teeth formed on a side thereof, and teeth formed on an opposite end thereof. The gear is located in the slot. A pawl formed with at least one tooth and a block is located in each of the cavities. A shell includes two pushers formed on an internal side thereof. The shell is rotationally provided around the frame between two one-way modes in each of which a related one of the pushers pushes the blocks of two related ones of the pawls to disengage the teeth of the two pawls from the teeth of the gear.
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