Core drill

Details Core drill Core drill

1978-03-21

1980-06-17

Briggs, William R.

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

125 20, 175330, 408145, B23B 5104

Patent

active

042081548

ABSTRACT:
Improved core drills and core drill elements. The core drill is of the type having a carrying drill tube and at least one cutting element attached to one end of drill tube. In the present invention, structural means are provided on one end surface of the cutting element extending over the entire length of the end surface to receive all or a portion of the one end of the drill tube to strengthen the core drill. The invention is also directed toward a method for making the improved core drill and a method for reconstructing it. The cutting elements can be curved or straight.

REFERENCES:
patent: 922640 (1909-05-01), Williams, Jr. et al.
patent: 1676887 (1928-07-01), Chamberlin
patent: 2326908 (1943-08-01), Williams, Jr.
patent: 2343793 (1944-03-01), Paget
patent: 2358460 (1944-09-01), Kelleher
patent: 2552485 (1951-05-01), Howard et al.
patent: 3127715 (1964-04-01), Christensen
patent: 3146561 (1964-09-01), Lindblad
patent: 3176675 (1965-04-01), Bomba
patent: 3243924 (1966-04-01), Peters
patent: 3338230 (1967-08-01), Lindblad
patent: 3494348 (1970-02-01), Lindblad
patent: 3537538 (1970-11-01), Generoux
patent: 3610768 (1971-10-01), Cochran

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