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US Patent: 6,792,830
Unidirectional Ratchet Wrench
Michael T. DeKeuster - Racine, WI
Michael L. Foster - Kenosha, WI

USPTO Classifications:
192/43.1, 81/58.4, 81/59.1, 81/60, 81/61, 81/63.2

Tool Categories:
wrenches : ratchet wrenches

Snap-On, Inc. - Pleasant Prairie, WI

Not known to have been produced

none listed

Patent Dates:
Applied: May 13, 2002
Granted: Sep. 21, 2004

Patent Pictures:
USPTO pdf tiff
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Snap-On Tools Company History
Seyfarth, Shaw LLP - patent attorneys


A ratchet wrench is provided which includes a handle having a head on the handle, a rotatable gear disposed in the head and having ratchet teeth, and a pivotable pawl engaged with the gear to allow ratcheting rotation of the gear in a first direction and prevent ratcheting rotation of the gear in a second direction. An obstruction is engageable with a cam surface at the base of the pawl in order to prevent the pawl from self-reversing.

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