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US Patent: 155,785
Carriage-Wrenches
Improved Carriage-Wrench
Patentee:
Theadore Blodgett - Belchertown, MA

USPTO Classifications:
81/76

Tool Categories:
wrenches : axle nut wrenches : axle nut wrenches that lock nut to wheel hub

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Franklin Dickinson
M. S. Blodgett
C. E. Buckland
O. P. Hall

Patent Dates:
Applied: Jul. 16, 1874
Granted: Oct. 13, 1874

Patent Pictures:
Theadore Blodgett Pat. Oct. 13, 1874
USPTO pdf tiff
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Description:
Squeezing the handles forces the lower ends outward against the inside of the wheel hub, while the center socket holds the axle nut. The toothed bar at the ends of the handles locks the tool in place when it is in use. The effect is to clamp the axle nut to the wheel, so that the wheel and nut can be turned off and on together.

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