Boring tool

Details Boring tool Boring tool

1978-05-01

1980-04-08

Briggs, William R.

Cutting by use of rotating axially moving tool

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

Having tool-opposing, work-engaging surface

408103, 408111, 408137, B23B 3914, B23B 4514

Patent

active

041970411

ABSTRACT:
A compact boring tool has a support base with a pair of blocks mounted thereon to mount a work piece and a feed support block spaced apart therefrom having a threaded opening for supporting a feed screw. The feed screw has threads matching the threaded opening of the support block and a quill rotatably mounted through its center, the quill having a socket head for being driven and a shank end for receiving and securing a drill bit or drill chuck. A locking pin selectively locks the quill to the feed screw to provide for power backing out of the feed screw and quill after a hole has been drilled in the work. A support plate attachment is provided for converting the boring tool for surface boring operation.

REFERENCES:
patent: 288510 (1883-11-01), Taft
patent: 579037 (1897-03-01), Bulock et al.
patent: 589110 (1897-08-01), Armstrong
patent: 685738 (1901-11-01), Bright
patent: 1882689 (1932-10-01), Albertson
patent: 2508402 (1950-05-01), Kjerulff
patent: 2911860 (1959-11-01), Winslow et al.
patent: 3068725 (1962-12-01), VerNooy
patent: 3767313 (1973-10-01), Bohoroquez et al.
patent: 4090805 (1978-05-01), Grimsley
Design News, p. 6, 8-8-77, "Flexible Shaft-Key to Difficult Drilling", J. P. Lerro Jr.

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