US Patent: 972,052


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US Patent: 972,052

Wrench

Patentee:

John Boulieu (exact or similar names) - Sault Ste. Marie, MI

USPTO Classifications:

81/117

Tool Categories:

wrenches : wrench adjustment types : self-adjust wrenches

wrenches : pipe wrenches

Assignees:

John Boulieu - Sault Ste. Marie, MI

James B. Ryan - Sault Ste. Marie, MI

Manufacturer:

Lake Superior Wrench Co. - Sault Ste. Marie, MI

Witnesses:

Patent Dates:
Applied:	Sep. 30, 1909
Granted:	Oct. 04, 1910

Patent Pictures: [ 1 | 2 ]

John Boulieu patent October 4, 1910

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Description:

Parallelogram self-adjusting wrench with spring to close jaws, and motion limit stop to prevent jaws from going past "full open."

It is an obvious improvement to patent no. 933,096, but the earlier patent is not noted in the specifications. Known examples also indicate a July 12, 1910 Canadian patent (pat. no. CA-126,847).

A couple of Sault Ste Marie histories note James B. Ryan's connection to the LAKE SUPERIOR WRENCH.