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US Patent: 9,945
Improvement in Screw-Wrenches
Coach-Wrench
Patentee:
Aury Gates Coes - Worcester, MA

USPTO Classifications:
81/163

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

Assignees:
None

Manufacturer:
L. & A.G. Coes - Worcester, MA

Witnesses:
Emory Washburn
J. B. Keyes

Patent Dates:
Applied: Apr. 02, 1853
Granted: Aug. 16, 1853

Reissue Information:
Reissued as RE874 (Jan. 03, 1860)

Patent Pictures: [ 1 | 2 ]
A.G. Coes Double Screw Wrench patent Aug. 16, 1853
USPTO pdf tiff
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Description:
The wrench combines the motion of two pairs of male and female threads to achieve rapid adjustment of a nut wrench jaw. The inside and outside of the adjusting nut are threaded. The Coes Double Screw Nut wrench is a noted "prize" for collectors.

For another approach, see Coes' later patent 11,208, which was never put into production.

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