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US Patent: 800,850
Pipe Wrench
Patentees:
David H. Irland - Chicago, IL
Frances A Irland - Chicago, IL

USPTO Classifications:
81/99

Tool Categories:
wrenches : pipe wrenches
wrenches : wrench adjustment types : quick adjust wrenches

Assignees:
Irland Pipe Wrench Co. - Boston, MA

Manufacturer:
Irland Pipe Wrench Co. - Boston, MA

Witnesses:
J. A. Smith
Stephen D. May
Harrison Kelley
J. E. Richards
Marion E. Brown

Patent Dates:
Applied: May 23, 1905
Granted: Oct. 03, 1905

Patent Pictures: [ 1 | 2 ]
David H. Irland Pat. Oct. 3, 1905
USPTO pdf tiff
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Description:
The compression spring in the handle works to close the jaw; the swinging handle opens the jaw by an internal linkage. This facilitated one-handed operation. This improvement on Irland's July 7, 1903 and Sept. 22, 1903 patents (nos. 732,858 & 739,316) is reflected in the 1906 "new product announcements" found in trade journals.

Further / alternate improvements appear in patent nos. 868,126 and 868,127.

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