Multiple bit screwdriver

Details Multiple bit screwdriver Multiple bit screwdriver

1988-12-16

1990-05-15

Hartman, Judy

Tools

Wrench, screwdriver, or driver therefor

Having work engaging and force exerting portion inserted...

81439, 811774, 81490, B25B 2500

Patent

active

049247336

ABSTRACT:
A Multiple Bit Screwdriver has a handle with a plurality of bits in a circular array of longitudinal bores within a handle magazine. A rotatable end cap on the handle is provided with a slot for receiving the bit, and the desired bit is selected by rotating the end cap to align the slot with a particular bore. The selected bit is withdrawn from the magazine by inserting a second bit into the bore through the slot in the end cap, thereby forcing the selected bit out of the bore through the opposite end. The bit is retained in working position on the screwdriver shaft by magnetic means. Double-ended bits may be utilized.

REFERENCES:
patent: 733126 (1903-07-01), Bellows
patent: 1418184 (1922-05-01), Trunick
patent: 1712343 (1929-05-01), Gerhardt
patent: 3006395 (1961-10-01), Dye
patent: 3405749 (1968-10-01), Butler
patent: 3753455 (1973-08-01), Butler
patent: 4010663 (1977-03-01), Rydberg
patent: 4235269 (1980-11-01), Kraus
patent: 4253356 (1981-03-01), Martinmaas
patent: 4327790 (1982-05-01), Stevens et al.
patent: 4434828 (1984-03-01), Trincia
patent: 4440048 (1984-04-01), Stevens
patent: 4463788 (1984-08-01), Corona et al.
patent: 4480668 (1984-11-01), Lin

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