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US Patent: 602,590
Pipe Wrench
Patentee:
Lorin C. Springer (exact or similar names) - Chicago, IL

USPTO Classifications:
81/382, 81/413, 81/427

Tool Categories:
wrenches : pipe wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Frederick C. Goodwin
Irvine Miller
S. S. Mann

Patent Dates:
Applied: Nov. 04, 1897
Granted: Apr. 19, 1898

Patent Pictures:
Lorin C. Springer patent April 19, 1898
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Description:
A spring works to close the jaws. The secondary lever handle opens the jaws. It also has a pivot tooth that engages notches in a rack on the main shank to set the size.

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