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US Patent: 45,334
Improvement in Wrenches
Lowell Ratchet
Patentee:
D. M. Moore - Windsor, VT

USPTO Classifications:
81/62

Tool Categories:
wrenches : ratchet wrenches

Assignees:
None

Manufacturer:
Lowell Wrench Co. - Worcester, MA

Witnesses:
Ed. S. Fay
M. C. Hubbard

Patent Dates:
Granted: Dec. 06, 1864

Patent Pictures: [ 1 | 2 ]
D.M. Moore Pat. No. 45,334 Dec. 6, 1864
USPTO pdf tiff
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Sinclair and others v. Backus
Description:
Reversible ratchet; with the selection lever centered both pawls engage and the head will not rotate in relation to the handle. The patent was used for a long-lived series of rugged ratchet wrenches, and ratchet drill handles.

In Sinclair and others v. Backus, the patent was held to be valid. The suit challenged the ratchet feature of brace wrenches based on Backus' June 24, 1879 patent (no. 216,776). Part of the discussion in the case compared Moore's design to the Coggeshall ratchet.

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