US Patent: 3,955,451
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| Hand-Held Spin-Type Driver Tool
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Patentee:
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| William F. Lohness (exact or similar names) - Jonesville, MI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Feb. 14, 1975 |
| Granted: |
May 11, 1976 |
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Joel Havens
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Description: |
| Dressler, Goldsmith, Clement & Gordon, Ltd. - patent attorneys
Abstract
A new form of assembly for a high torque capability spin-type driver tool is disclosed. The tool has a shaft of uniform cross-sectional dimension with an elongated segment of substantially reduced cross-sectional dimension or shape at one end. A plurality of fin-shaped members extend radially outward along the reduced cross-sectional portion to provide a coupling for applying the turning force or torque to the shaft. The shaft is adapted for use with handled driver tools, such as screwdrivers and nutdrivers as well as with power driving tools. The reduced cross-sectional dimension segment and fin-shaped members present an axially smooth surface about which a press-fitted handle grip will contiguously engage. The fin-shaped members prevent the handle grip from slipping rotationally about the shaft in the presence of torsional forces.
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