Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Having tool-opposing – work-engaging surface
Patent
1992-09-23
1994-10-04
Howell, Daniel W.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Having tool-opposing, work-engaging surface
408111, 408138, B23B 4718
Patent
active
053520700
ABSTRACT:
Supplemental apparatus for a hand-held power drill that uses the rotational movement of the drill for both rotating a drill bit and advancing the drill bit into the work piece. In one form the illustrated apparatus comprises a separate attachment that includes a base for releasibly attaching to a hand drill. The base supports a moveable support unit for releasibly holding a selected drill bit in a position to be advanced into the work piece to drill a desired hole. A transmission mechanism on the base is connected to the support unit and transmits rotation from the chuck of the drill so as to both (1) rotate the drill bit, and (2) move the drill bit forwardly relative to the base into the work piece. The power drill connects to the attachment from the side so that it is disposed generally at right angles to the drill bit. This arrangement is very compact and allows the drill to be used in a limited spaces where it is very difficult for the operator to otherwise apply, from the side, the required forward force on the drill. The attachment may also include a control such as a clutch that is manually operable by the operator to selectively vary how rapidly the drill bit advances into the work piece. In another form the apparatus and the drill may be combined in one integrated unit.
REFERENCES:
patent: 1434946 (1922-11-01), Fiorillo
patent: 2617455 (1952-11-01), Kuta
patent: 3679320 (1972-07-01), Bohorquez et al.
patent: 3884280 (1975-05-01), Chailer
patent: 4890962 (1990-01-01), Nydegger
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