US Patent: 1,406,910


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Wrench

Patentee:

Harry C. Sutherland (exact or similar names) - Oak Park, IL

USPTO Classifications:

81/91.2, 81/99

Tool Categories:

wrenches : wrench adjustment types : self-adjust wrenches

wrenches : pipe wrenches

Assignees:

None

Manufacturer:

Sutherland Wrench Co. - Chicago, IL

Witnesses:

none listed

Patent Dates:
Applied:	Jan. 10, 1921
Granted:	Feb. 14, 1922

Patent Pictures: [ 1 | 2 ]

Harry C. Sutherland patent February 14, 1922

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Description:

A self-adjusting wrench with a spring-loaded hook jaw. The patent has a "trigger" to hold the jaw in the open position.

In the spring of 2008, Martin Donnelly's mjdtools spring auctions included a prototype of this wrench along with an archive of business start-up documents. A Mr. Bystrom figures prominently in these documents.