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US 5,701,961 AGranted
Electronic push to start nutrunner
AssigneeIngersoll-Rand Company
InventorsDonald R. Warner, John A. McCallops, John M. Estep
Life of this patent
Estimating the term…
Abstract
A latching magnetic switch is utilized to activate a push to start nutrunner or the like wherein the magnetic latching switch is deactivated first by one magnetic pole and thereafter upon engagement with the work piece and compression of the spindle and opposite pole of the magnet is utilized to activate the tool.
Claims9
A push to start nutrunner comprising:
- a power driven nutrunner;
- an electronic power controller for controlling power to said nutrunner;
- said nutrunner being further provided with a retractable spindle;
- and
- means for magnetically sensing a retracted position of said retractable spindle and for providing a signal of said retracted position to said controller to initiate power to drive said nutrunner.
2 more elements
Dependencies are inferred from the claim text.