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US Patent: 3,314,319
Pliers-Type Hand Tool
Patentee:
Charles C. Schmidt (exact or similar names) - Topeka, KS

USPTO Classifications:
81/367, 81/420

Tool Categories:
wrenches : pliers type wrenches : locking pliers

Assignees:
None

Manufacturer:
Mara, Inc. - Topeka, KS

Witnesses:
none listed

Patent Dates:
Applied: Jun. 25, 1965
Granted: Apr. 18, 1967

Patent Pictures: [ 1 | 2 ]
Charles C. Schmidt patent April 18, 1967
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Report data errors or omissions to steward Stan Schulz
Description:
Jaws designed for sheet metal work; specifically the metal edges of duct work using "drive cleat" connections. A primary function is to clamp duct work sections together to facilitate installing the "drive cleats."

Known example does not include the "stop" screw which would allow the distance between the jaw edges when the tool is "locked" to be pre-set to a predetermined gap.

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