Screw fasteners and drivers

Details Screw fasteners and drivers Screw fasteners and drivers

1983-01-17

1985-07-16

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Machine

81436, 81452, 81461, 411410, B25B 2302

Patent

active

045288747

ABSTRACT:
An improved arrangement for driving threaded screw fasteners both manually and automatically utilizes mating conformations in the fastener head and driver including a central, preferably conical, depression in the head and a complementally shaped central projection extending from the driving tool. Further, the head is formed with slots, less deep than the depression, which open both at the depression and at the outer margins of the head. The driver is formed with corresponding blade sections.
The central projection and depression are formed such that force along axis of the driver toward the head and rotational force about the driver axis tend to force the fastener axis to alignment with the driver axis.

REFERENCES:
patent: 622476 (1899-04-01), Hubbell
patent: 1779339 (1930-10-01), Sokoloff
patent: 1797390 (1931-03-01), Wood
patent: 3175593 (1965-03-01), Launay
patent: 3891017 (1975-06-01), Iskra

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