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US Patent: 5,781,950
Locking Mechanism For A Folding Combination Tool
David A. Swinden - Ellenville, NY
John Dennis Lemaire - Quebec, QC Canada

USPTO Classifications:
30/161, 7/118, 7/128, 7/129, 7/130, 7/167

Tool Categories:
combination tools

Imperial Schrade Corporation - Ellenville, NY

American Tool Companies - Wilmington, OH


Patent Dates:
Applied: Oct. 07, 1996
Granted: Jul. 21, 1998

Patent Pictures:
David A. Swinden and John Dennis Lemaire patent July 21, 1998
USPTO pdf tiff
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Nov. 2001 review of Vise-Grip (tm) Toolbox (tm)
The patent includes the entire "Leatherman type" pliers with folding box beam handles, and fold-out tools at the ends of the handles. The fold-out tools lock in place in both the fully extended and folded in positions.

The patent cites an extensive list of prior art patents as references, and other combination tool patents are noted in the history narrative.

The patent appears together with lock release patent no. 6,219,870 on the combination tool bearing handle of the VISE-GRIP (tm) TOOLBOX (tm) locking pliers combination tool. In early 2008 this tool no longer appears in the VISE-GRIP (tm) or SCHRADE (tm) product lines.

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