Patent 8240647 was granted and assigned to Irwin Industrial Tools on August, 2012 by the United States Patent and Trademark Office.
A clamping and/or spreading tool comprises a drive for displacement of a push or pull rod to which a movable jaw is fixed with respect to a support carrying a stationary jaw in longitudinal direction of the push and pull rod, the drive comprising a torsion spring and being adapted to enter torque transmitting engagement with the push or pull rod for displacement of the same.