Tools – Wrench – screwdriver – or driver therefor
Patent
1975-06-18
1977-06-07
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
81 582, 81185, B25D 23142
Patent
active
040275582
ABSTRACT:
Ratchet-type wrench heads employ drive adapters in conjunction with multiple torque wrench handles to provide wider ranges of torque ratings with each head.
REFERENCES:
patent: 905070 (1908-11-01), Heck
patent: 2337368 (1943-12-01), Bohler
patent: 2578687 (1951-12-01), Fish
patent: 2962918 (1960-12-01), Van Hoose
patent: 2996940 (1961-08-01), Van Hoose
patent: 3175434 (1965-03-01), Bergquist
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