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US 4,063,625 AGranted
Improved screw or nut runner
AssigneeAtlas Copco Aktiebolag
InventorGunnar Christer Hansson
Life of this patent
Estimating the term…
Abstract
A screw or nut runner for tightening screw joints wherein a speed related braking force is applied upon those rotating parts of the nut runner that are positively coupled to the screw joint, thereby avoiding the influence of the inertia factor upon the obtained torque level. The power transmission of the screw or nut runner comprises a magnetic release clutch. A centrifugal brake is located after the release clutch in the power train for preloading the release clutch by generating a speed related braking force.
Claims10
A screw or nut runner comprising:
- a housing,
- a motor,
- an output shaft, and
- a power transmission connecting said motor to said output shaft,
- said power transmission comprising a torque release clutch, and brake means located after said torque release clutch in the power train, and including means responsive to centrifugal forces for braking said power transmission and said output shaft relative to said housing by a decreasing magnitude during decreasing rotation speed of said output shaft.
2 more elements
Dependencies are inferred from the claim text.