Rock working tool

Details Rock working tool Rock working tool

1990-04-27

1991-10-22

Kisliuk, Bruce M.

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

299 81, E21B 1018

Patent

active

050586904

ABSTRACT:
Rock working tool for a tunnel boring machine. The tool comprises a shaft (34) with a central hole (35). A tool part (8,9) is rotatably journalled on the shaft. The tool is cooled through the arrangement of channels (40,41,42) in the tool for conducting cooling liquid from a pressure liquid source (22) to the central hole and via the channel (42) which flushes directly on the tool part (8,9).

REFERENCES:
patent: 1130289 (1915-03-01), Hughes
patent: 1151104 (1915-08-01), Humason
patent: 1532551 (1925-04-01), Reed
patent: 3698769 (1972-10-01), Amoroso
patent: 4363367 (1982-12-01), Dixon et al.
patent: 4718730 (1988-01-01), Unger

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