Blast furnace tap hole drill with centralizing drill rod support

Details Blast furnace tap hole drill with centralizing drill rod support Blast furnace tap hole drill with centralizing drill rod support

1990-10-26

1991-12-03

Kastler, S.

Metallurgical apparatus

Means sealing or opening aperture in vessel

266 45, C21C 548

Patent

active

050694308

ABSTRACT:
A blast furnace tap hole drill is provided having an elongated feedshell which supports a percussion drill, drill rod assembly, and a centralizing drill rod support disposed between the percussion drill and a stationary forward end drill rod support, and a drive means for advancing the percussion drill and centralizing drill rod support in unison along the length of the feedshell such that the advancing motion of the centralizing drill rod support ceases as it nears the forward drill rod support without stopping the advancing motion of the percussion drill.

REFERENCES:
patent: 3507484 (1970-04-01), Honda
patent: 4335265 (1982-06-01), Roberge et al.
patent: 4418894 (1983-12-01), Mailliet
patent: 4431171 (1984-02-01), Foster
patent: 4602770 (1986-07-01), Mailliet et al.
patent: 4893794 (1990-01-01), Mailliet et al.

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