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US Patent: 2,780,944
Reversible drive for power tools
Elmer J. Ondeck - Brookfield, IL

USPTO Classifications:
408/124, 475/270, 475/286, 81/57.31

Tool Categories:
specialty tools : handheld power tools : power tool attachments
woodworking machines : handheld power tools : handheld power tool accessories

Supreme Products Corp. - Chicago, IL

Supreme Products Corp. - Chicago, IL
Ridge Tool Co. - Elyria, OH

none listed

Patent Dates:
Applied: Feb. 26, 1954
Granted: Feb. 12, 1957

Patent Pictures: [ 1 | 2 | 3 ]
Reversing portion of mechanism. Not shown are the planetary gears
USPTO pdf tiff
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"mrpete222" YouTube video showing this speed reducer
"Vintage Machinery" entry for Ridge Tool Co.
"Vintage Machinery" entry for Supreme Products, Inc.
Seen on YouTube: an example of this reversible speed reducer. The box is labeled Ridgid / Supreme Model No. 4100 Versamatic reversible power drill speed reducer / The Ridge Tool Company / Elyria, Ohio". This device may have been manufactured by Supreme for resale by Ridgid.

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