US Patent: 4,375,128 - Manual keyway punching tool


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US Patent: 4,375,128

Manual keyway punching tool

Patentee:

Wayne Linquist (exact or similar names) - Rockford, IL

USPTO Classifications:

30/184, 30/242, 30/363

Tool Categories:

metalworking tools : metal punches

trade specific : electrician

Assignees:

Ex-Cell-O Corp. - Troy, MI

Manufacturer:

Ex-Cell-O Corp. - Troy, MI

Greenlee Brothers & Co. - Rockford, IL

Witnesses:

Unknown

Patent Dates:
Applied:	Apr. 13, 1981
Granted:	Mar. 01, 1983

Patent Pictures:

USPTO (New site tip)
Google Patents
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Vintage Machinery entry for Ex-Cell-O Corp.
Vintage Machinery entry for Greenlee Brothers & Co.

Description:

This tool cuts notches or slits in metal or plastic. The patent's specification references patents 3,263,545 and 4,111,022, the latter being a crimping tool that uses a two-lever similar mechanism. This patent's number has been seen in a 1988 Greenlee catalog, for their No. 720 Keyway Punch.