Portable core drill cutter for hard brittle sheets

Details Portable core drill cutter for hard brittle sheets Portable core drill cutter for hard brittle sheets

1977-07-28

1983-04-26

Bilinsky, Z. R.

Stone working

Sawing

Disk cutting

51 81R, 51111R, 51283R, 408 41, 408 60, 408 94, 408145, 408119, 408204, B23B 3500, B23B 4100, B28D 102

Patent

active

043809901

ABSTRACT:
A portable lightweight drill assembly is mounted against one side of a sheet of flat glass having a hole or crack to be repaired; the drill shaft extends through the hole or crack to mount cutters on both sides; the cutters are spring biased against the glass to exert equal cutting force and simultaneously rotatable with the drill shaft to cut the hole from both sides to a diameter larger than the hole to be repaired, for insertion of a glass repair plug.

REFERENCES:
patent: 2081487 (1937-05-01), Lane
patent: 2941338 (1960-06-01), Santschi
patent: 3007686 (1961-11-01), Pearson
patent: 3527275 (1970-09-01), Koehler

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