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US Patent: 622,471
Wrench
Patentee:
Frank S. Hollweck - Philadelphia, PA

USPTO Classifications:
81/157, 81/170, 81/52

Tool Categories:
wrenches : wrench adjustment types : screw adjust wrenches
wrenches : wrench components : wrench handle components

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. L. Ames
C. N. Walker
Henry Feiling
Joseph Feiling

Patent Dates:
Applied: May 14, 1898
Granted: Apr. 04, 1899

Patent Pictures:
Frank S. Hollweck patent April 4, 1899
USPTO pdf tiff
Google Patents
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Description:
Screw-adjust "monkey wrench" with a spring and paired levers supporting the base of the adjusting sleeve. Opening the levers allows the movable jaw to retract, thereby enabling "ratchet" type movement.

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