US Patent: 2,388,580
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Wrench
Locking parallel jaw adjustable wrench
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Patentee:
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| Francis A. Snell (exact or similar names) - Chenango Forks, NY |
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Patent Dates:
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| Applied: |
Nov. 01, 1944 |
| Granted: |
Nov. 06, 1945 |
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Patent Pictures:
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1 | 2
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Francis A. Snell patent November 6, 1945 |
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Stan Schulz
BMC from 2015 blog post.
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Description: |
| Parallel jaw locking pliers wrench, this patent used together with design patent no. D143,941. The secondary link in this patent appears in the 9 inch version; the 7 inch wrench matches the design patent -- see the 2nd photo. Both wrenches are made primarily of flat stampings riveted together. The fixed jaw is a forged piece and the handle insert is red plastic.
The screw adjustment sets the size. 7 inch opens to 3/4 inch; 9 inch opens to 1 inch; 11 inch opens to 1 1/2 inch.
Patent numbers 2,436,497, 2,420,020, 2,436,497 and 2,478,728 reflect a subsequent evolution of the internal workings and probably more closely match the tool as produced.
By late 1946, the manufacturer was identified as BMC Mfg. Corp. in advertising. Examples marked with Steger, ILL as location of BMC Mfg. Co. are late production. |
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