Drill rod for percussion drilling

Details Drill rod for percussion drilling Drill rod for percussion drilling

1989-07-25

1991-11-12

Eley, Timothy V.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

285 55, B65D 900

Patent

active

050640046

ABSTRACT:
The present invention relates to a drill rod for percussion drilling machine comprising a rod or a sleeve-shaped element that is provided with a threaded portion for engagement with another correspondingly threaded drill rod element. In order to reduce the risk for pitting damage, the threaded portion is provided with a wear lining that is metallurgically bonded to the rod. The lining is made of a metallic material that is softer than the material of the element, the latter usually being steel.

REFERENCES:
patent: 2955847 (1960-10-01), McKenna
patent: 3709306 (1973-08-01), Curington
patent: 4006787 (1977-02-01), Rumpp et al.
patent: 4051905 (1977-10-01), Kleine
patent: 4295751 (1981-10-01), Holmberg
patent: 4468309 (1984-08-01), White
patent: 4474651 (1984-10-01), Yauchi et al.
patent: 4630849 (1986-12-01), Fukui et al.
patent: 4760887 (1988-08-01), Jansson et al.
Boyer et al., Metals Handbook--Desk Edition, published by American Society for Metals, Metals Park, Ohio, 1985, pp. IN 39, 1-14, 1-15, 1-25, and 1-29.

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