Twist-lock connection and tool utilizing same

Details Twist-lock connection and tool utilizing same Twist-lock connection and tool utilizing same

1980-07-31

1982-09-21

Vlachos, Leonidas

Compound tools

Cutter combined with other tool or tools

81439, 279 1A, 408226, B25F 110

Patent

active

043499295

ABSTRACT:
Apparatus for attaching a drill bit to a power tool. A first adaptor can be chucked into the tool. A second adaptor has a shank with a first longitudinal groove extending from one end and a second lateral groove intersecting the first. The shank is received in a bore of the first adaptor and a protrusion engages in the first and then the second groove as the shank is inserted and then rotated. The bore has a resilient spring member which engages the shank of the second member and prevents undesired counter-rotation. The first adaptor is equipped with a hexagonal recess which can, alternatively, engage hex-headed fasteners or the hexagonal stem of an internal recess driver attachment.

REFERENCES:
patent: 151450 (1874-05-01), Tolman
patent: 1182934 (1916-05-01), Scott
patent: 2716393 (1955-08-01), Fischer
patent: 2772589 (1956-12-01), Brenholts
patent: 3135522 (1964-06-01), Bell
patent: 3176998 (1965-04-01), Parker
patent: 3336611 (1967-08-01), Schepp
patent: 3965510 (1976-06-01), Ernst
patent: 3984192 (1976-10-01), Wanner et al.
patent: 4107800 (1978-08-01), Jorgensen
patent: 4146240 (1979-03-01), Neilsen

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