Torque control type impact wrench
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 30, 2002
Grant Date -
Aug 2, 2001
app pub date -
Jan 25, 2001
filing date -
Jan 28, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A torque control type impact wrench includes a first storage section for storing an ideal upper limit of the pulsed torque for screwing a male screw into a female screw, as a first storage value, a second storage section for storing a driving speed at which a driving section drives a torque producing section as a second storage value, and a control section for causing the driving section to drive the torque producing section at the second storage value and stopping the driving section when the pulsed torque exceeds the first storage value, wherein the control section causes the second storage section to store a value, which is larger than the second storage value, as a new second storage value when the pulsed torque does not reach the first storage value within a given time period after the driving section starts.
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