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US Patent: 1,026,040
Pipe Wrench
William Andrew Hyle - Toronto, ON Canada

USPTO Classifications:
81/102, 81/105

Tool Categories:
wrenches : pipe wrenches

MacDonald and Sons, Ltd. - Toronto, ON Canada

Barcalo Mfg. Co. - Buffalo, NY

T. E. M. Fetherstonhaugh
Robt. K. Davis
M. Egan
B. Boyd

Patent Dates:
Applied: Feb. 23, 1911
Granted: May 14, 1912

Patent Pictures:
William Andrew Hyle patent May 14, 1912 with BARCALO BUFFALO / 10 IN. - DROP FORGED - PAT 1911 example
USPTO pdf tiff
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Solid frame with a circular opening for the adjusting nut and sector blocks. This construction eliminates the use of springs to prevent the wrench "locking" on pipe.

Markings on a known example reflect the Canadian patent date (patent no. CA-136213 granted Oct. 17, 1911).

The patent is included in a list of "relevant prior art" in the specifications for patent no. 2,555,395.

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