Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Reexamination Certificate
2005-05-11
2008-09-02
Rada, Rinaldi I. (Department: 3721)
Tool driving or impacting
Automatic control of power operated means
Drive means responsive to torque or speed condition
C173S176000, C173S104000
Reexamination Certificate
active
07419013
ABSTRACT:
A rotary impact tool can be used in a work especially precision or finishing of fastening is important. The rotary impact tool comprises a rotary driving mechanism including a driving source for rotating a driving shaft, a hammer fixed on the driving shaft, an output shaft to which a driving force is applied by impact blow of the hammer, a torque setting unit used for setting a fastening torque, a processor for calculating fastening torque from impact blow of the hammer, a rotation speed setting unit used for setting rotation speed of the driving shaft, and a controller for rotating the driving shaft of the rotary driving mechanism in a rotation speed set in the rotation speed setting unit and for stopping rotation of the driving shaft of the rotary driving mechanism when the fastening torque calculated in the processor becomes equal to or larger than a reference value of fastening torque previously set in the torque setting unit.
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Arimura Tadashi
Matsumoto Tatsuhiko
Ohashi Toshiharu
Sainomoto Yoshinori
Sawano Fumiaki
Greenblum & Bernstein P.L.C.
Low Lindsay
Matsushita Electric & Works Ltd.
Rada Rinaldi I.
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