Electric screwdriver

Details Electric screwdriver Electric screwdriver

1988-09-14

1989-11-07

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Machine

81 52, B25B 2100

Patent

active

048784044

ABSTRACT:
An electric screwdriver includes a housing, a power output end, and a control cylinder mounting therein an active shaft connecting thereto a following shaft connecting thereto a driver mounting piece axially slidably mounted in a cap cylinder and a torsion-adjusting cylinder wherein the mounting piece has an engaging end attaching thereto a flange attaching thereon a light-shielding piece capable of shielding the light emitted by a photic control switch mounted on the control cylinder to allow the motor in the housing to be energized when the mounting piece mounts thereon a driver urging against a screw.

REFERENCES:
patent: 4617843 (1986-10-01), Nishida et al.

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