Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1991-02-22
1992-04-28
Smith, James G.
Tools
Wrench, screwdriver, or driver therefor
Machine
81 5714, B25B 1700
Patent
active
051077299
ABSTRACT:
A torque multiplying wrench having a jaw at one end and an adaptor at the other end for receiving torque input. The wrench employs a rotatable shaft extending the length of the wrench with bevel gears at the proximate end to engage the input adaptor and a bevel gear arrangement at the distal end to transfer torque from the shaft to the jaw which is toothed. The bevel gear arrangement at the distal end of the wrench employs a pair of shafts engaged at one end to said rotatable shaft through bevel gears. The shafts fan out to opposite sides of the jaw and employ worm gears to transmit the output torque to the jaw. The worm gears are especially designed to increase the number of teeth engaged with the jaw in order to reduce the load on individual teeth.
REFERENCES:
patent: 1420635 (1922-06-01), Klopper
patent: 1487785 (1924-03-01), Knowles
patent: 1489908 (1924-04-01), Tanner
patent: 1875529 (1932-09-01), Vandervoort
patent: 3630106 (1971-12-01), Olinger
patent: 4254674 (1981-03-01), Strussion et al.
patent: 4506567 (1985-03-01), Makhlouf
Belkin Leonard
Smith James G.
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