Drilling machine

Details Drilling machine Drilling machine

1976-02-04

1977-03-08

Husar, Francis S.

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

408111, 408712, B23B 4514

Patent

active

040110249

ABSTRACT:
Properly aligned threaded or smooth bores are machined in a pipe boss fla without requiring supplementary staging or makeshift rigs. An expandable holding sleeve is inserted in the throat of the pipe and a mounting unit is brought to rest on the outer surface of the pipe boss flange. A holding sleeve is expanded to engage the pipe and a bracket grips a projection from the mounting unit at a predetermined angular rotation while an extension of the bracket ensures a perpendicular orientation. A vertical feed mechanism mounted on the bracket directs a motor driven drill assembly through holes located in the mounting plate. After the holes and threads are machined in the pipe boss flange, the expandable sleeve is loosened and the unit is removed at a minimal time and effort expenditure.

REFERENCES:
patent: 1584071 (1926-05-01), Arnold
patent: 2040273 (1936-05-01), Rottler
patent: 2825143 (1958-03-01), Polivka
patent: 2911860 (1959-11-01), Winslow et al.
patent: 3069934 (1962-12-01), Lunsford
patent: 3635570 (1972-01-01), DeGelleke et al.
patent: 3663115 (1972-05-01), Vindez et al.
patent: 3810710 (1974-05-01), Ennemoser
patent: 3830585 (1974-08-01), Nakada et al.

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