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US Patent: 1,854,513
Reversible Ratchet Wrench
Louis A. Hummel - Milwaukee, WI

USPTO Classifications:
192/43.1, 81/63

Tool Categories:
wrenches : ratchet wrenches

Snap-On Tools, Inc. - Kenosha, WI

Snap-On Tools, Inc. - Kenosha, WI

none listed

Patent Dates:
Applied: Mar. 29, 1930
Granted: Apr. 19, 1932

Patent Pictures: [ 1 | 2 ]
Louis A. Hummel patent April 19, 1932
USPTO pdf tiff
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A unique tensioning spring and rotary pawl which can be positioned to ratchet in either direction are the core of the patent. The patent number appears on reversible ratchet wrenches produced by Snap-On. Some known examples have digits in the patent number transposed in the markings.

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