Driver bit and driver

Details Driver bit and driver Driver bit and driver

1998-09-08

2000-11-28

Smith, James G.

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81436, B25B 2308

Patent

active

061520004

ABSTRACT:
A driver bit and a driving tool having a plurality of projections formed on at least one surface of the shank portion/driving portion of the bit/tool to retain the bit in a bit holder, or to retain a socket or the like on the driving tool. The projections are formed such that the geometric envelope of the bit is within the tolerance of the bit holder, so that the bit can be used with standardized holders. When torque is applied to the bit or driving tool, the projections engage the inner surface of a standardized holder/socket, thereby retaining the bit/socket.

REFERENCES:
patent: 1738405 (1929-12-01), Thal
patent: 1844241 (1932-02-01), Bryant
patent: 1899489 (1933-02-01), Wickberg
patent: 2323018 (1943-06-01), De Vellier
patent: 3894450 (1975-07-01), Hill et al.
patent: 4209182 (1980-06-01), Sheldon
patent: 4235269 (1980-11-01), Kraus
patent: 5295423 (1994-03-01), Mikic
patent: 5335409 (1994-08-01), Elvebak
patent: 5351586 (1994-10-01), Habermehl et al.
patent: 5531143 (1996-07-01), Habermehl et al.
patent: 5535648 (1996-07-01), Braun et al.
patent: 5570616 (1996-11-01), Thompson et al.
patent: 5873290 (1999-02-01), Chaconas

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