US Patent: 933,096


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US Patent: 933,096

Wrench

Patentee:

William Hilliard Munro (exact or similar names) - Sault Ste. Marie, ON Canada

USPTO Classifications:

81/117, 81/185.2

Tool Categories:

wrenches : pipe wrenches

wrenches : wrench adjustment types : self-adjust wrenches

Assignees:

None

Manufacturer:

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

Superior Wrench Co. - Marshalltown, IA

Witnesses:

Patent Dates:
Applied:	Mar. 25, 1908
Granted:	Sep. 07, 1909

Patent Pictures: [ 1 | 2 | 3 ]

William Hilliard Munro patent September 7, 1909

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Description:

Parallelogram action self-adjusting wrench. Compare to the ELLRICH based on patent no. 366,246 (July 12, 1887).

Produced as the LAKE SUPERIOR (later SUPERIOR) wrench; a small size was given away as a subscription premium by several farm magazines. Earliest production includes "PAT APLD FOR" marking.

Corresponding patents: Canadian patent CA-117819 granted April 13, 1908; French patent FR-388,990 granted Aug. 27, 1908. Improved by pat no. 972,052, issued Oct. 4. 1910.