Slip-resistant magnetic sheath for a screwdriver

Details Slip-resistant magnetic sheath for a screwdriver Slip-resistant magnetic sheath for a screwdriver

2006-09-19

2006-09-19

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

C081S125000, C081S438000

Reexamination Certificate

active

07107882

ABSTRACT:
A slip-resistant magnetic sheath includes a hollow sleeve that can be fit onto the screwdriver's shank. A magnetic part positioned at least on one end of the hollow sleeve, provides auxiliary attraction to improve the connection between the shank and the screw with a fastening rim and groove set correspondingly on the sleeve of the magnetic sheath and the shank. The groove allows the fastening rim to move within a pre-set distance so that the magnetic sheath can slide within certain distance and not fall off the shank. The invention installed on an electrical screwdriver can effectively address the slipping problem caused by shocking. The forceful magnetic attraction of the magnetic sheath can prevent the screws from slipping and therefore improve working efficiency.

REFERENCES:
patent: 772912 (1904-10-01), Allam
patent: 2235235 (1941-03-01), Price
patent: 3392767 (1968-07-01), Stillwagon, Jr.
patent: 3739825 (1973-06-01), Knox
patent: 3884282 (1975-05-01), Dobrosielski
patent: 4736658 (1988-04-01), Jore
patent: 5724873 (1998-03-01), Hillinger

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