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US Patent: 5,280,740
Flexible Head Socket Wrench
Michael L. Ernst - Hamersville, OH

USPTO Classifications:
81/177.7, 81/73

Tool Categories:
wrenches : socket wrenches

Mac Tools, Inc. - Washington Court House, OH

Not known to have been produced

none listed

Patent Dates:
Applied: Jul. 11, 1990
Granted: Jan. 25, 1994

Patent Pictures:
USPTO pdf tiff
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Mac Tools History
Joseph G. Nauman; Eric J. Groen - patent attorneys


A socket wrench is shown having a socket driver head pinned to a clevis on a shaft. A sleeve is receivable over the shaft end and includes open ended slots pointing away from the clevis. The shaft includes a pin press fit within a cross bore on the shaft end, and the shaft and sleeve are axially slidable relative to each other; where in one position the pin engages one of the slots, and in another position, the shaft and sleeve spin freely of each other. A handle includes an internal bore which is profiled to compressively fit over the sleeve, and a chamber is defined between the sleeve and the end of the internal bore, to provide clearance for the axial movement of the shaft and sleeve.

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