Clamping attachment for portable drills

Details Clamping attachment for portable drills Clamping attachment for portable drills

1991-03-05

1991-11-05

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

Frictionally engaging sides of opening in work

408 95, B23B 4514

Patent

active

050627465

ABSTRACT:
An attachment for clamping a portable drill to a work piece includes a foot member which positions a portable drill with respect to a work piece. A contact pad applies pressure to the surface of the work piece. Located between the contact pad and the means for engagement of the portable drill is a guide path in which a housing is slidably mounted. Affixed to the housing is a means for applying a vertical force and a collet member. Said means being anti-back drivable. The vertical force is applied to a mandrel so that the mandrel expands the collet. Once the collet has been expanded, a force is placed on the contact pad and on the means for engaging the portable drill. Consequently, the portable drill is held in place at the desired location for drilling a finish hole using minimal force.

REFERENCES:
patent: 2963927 (1960-12-01), Hanger
patent: 3599958 (1971-08-01), Schindler
patent: 3663115 (1972-05-01), Vindez et al.
patent: 4286902 (1981-09-01), Gagliano et al.
patent: 4396318 (1983-08-01), Jensen et al.

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