Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Reexamination Certificate
2007-01-29
2011-11-29
Rada, Rinaldi I. (Department: 3721)
Tool driving or impacting
Automatic control of power operated means
Drive means responsive to torque or speed condition
C173S093500, C173S177000, C173S218000, C173S176000, C173S169000, C192S150000, C192S048700
Reexamination Certificate
active
08066082
ABSTRACT:
An air driver device having a simple construction, being of a compact size, and having excellent durability. The air driver device is designed to shut off a supply of compressed air to an air motor, by means of a tightening torque control mechanism and a shut-off valve mechanism, in a case where the tightening torque reaches the set torque value. The air device is designed to tighten screw members at a prescribed tightening force, wherein the tightening torque control mechanism is composed of (i) a clutch unit, (ii) a driving piston on the back face of which is formed one clutch plate, so that clutch plates of the clutch unit may move by making rotational differential motions in a case where the tightening torque reaches the set torque value, (iii) a cylinder for storing this driving piston, (iv) a check valve for operating the shut-off valve mechanism, in linkage with the driving piston through an oil charged in the cylinder, and (v) a torque control member for regulating the set torque value.
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Lopez Michelle
Rada Rinaldi I.
Uryu Seisaku Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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