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US Patent: RE4,450
Albert C. Richard's Improved Screw-Wrench
Patentee:
Albert C. Richard (exact or similar names) - Newtown, CT

USPTO Classifications:
81/163

Tool Categories:
wrenches : nut wrenches
wrenches : wrench adjustment types : screw adjust wrenches

Assignees:
Aury Gates Coes - Worcester, MA

Manufacturer:
Not known to have been produced

Witnesses:
Thomas H. Dodge
A. E. Pierce

Patent Dates:
Granted: Jun. 27, 1871

Reissue Information:
Reissue of 27,090 (Feb. 07, 1860)

Patent Pictures:
A.C. Richard Pat. Reissued June 27, 1871
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Description:
The adjusting screw is behind the adjustable jaw, at the head end of the wrench. The adjusting screw has both left and right hand threads so the adjustable jaw will move quickly.

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