US Patent: 6,139,359 - Cordless Screwdriver and Multi-Position Battery Pack Therefor


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US Patent: 6,139,359

Cordless Screwdriver and Multi-Position Battery Pack Therefor

Patentees:

John E. Fuhreck (exact or similar names) - Racine, WI

Joshua M. Beer (exact or similar names) - Racine, WI

Robert L. Hartman (exact or similar names) - Sioux City, IA

Dennis A. Nowak (exact or similar names) - Greendale, WI

John A. Pierman (exact or similar names) - Kenosha, WI

USPTO Classifications:

439/349, 439/500

Tool Categories:

screwdrivers

Assignees:

Snap-On Tools Co. - Kenosha, WI

Manufacturer:

Not known to have been produced

Witnesses:

none listed

Patent Dates:
Applied:	Apr. 08, 1999
Granted:	Oct. 31, 2000

Patent Pictures:

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Snap-On Tools Company History

Description:

Seyfarth & Shaw - patent attorneys

Abstract

A battery-powered driver tool has a tool housing with a socket-type coupler which receives a plug-type coupler of a battery pack in any of four different rotational orientations. Four keys on the battery pack are received in four keyways on the tool housing for non-rotatable engagement, the parts being retained by a split snap ring on the battery pack which cams past four cam shoulders on the tool housing, so that the parts automatically snap-engage and disengage in response to a simple push-pull motion. The battery pack includes a plurality of battery cells connected in series between positive and negative terminals which are designed to respectively engage positive and negative terminals on the tool housing in any of the four rotational orientations of the battery pack. The battery pack has a flat base surface, the parts being designed so that the tool/battery pack combination can be stood on the base surface in one rotational orientation of the battery pack.