Percussive tool with high pressure fluid jet

Details Percussive tool with high pressure fluid jet Percussive tool with high pressure fluid jet

1986-10-14

1988-04-12

Leppink, James A.

Boring or penetrating the earth

With above-ground means to impact an earth-penetrating means

173 80, 175211, 175417, 175424, E21B 102, E21B 1038

Patent

active

047368080

ABSTRACT:
In a percussive tool in which a very high pressure and preferably cavitating water jet is directed through an opening in the working surface of the tool, the jet is formed by a nozzle positioned in a cavity behind the opening and decoupled from the tool by a bearing layer of water from the jet. A supply pipe extends rearwardly of the nozzle without contacting the tool, and is supported externally of the tool, on a machine which operates the tool, by a support which allows the fluid bearing to center the nozzle within the cavity while restraining movement of the nozzle axially of the tool.

REFERENCES:
patent: 885337 (1908-04-01), Gilbreth
patent: 998910 (1911-07-01), Lange
patent: 1833477 (1931-11-01), Tomanek
patent: 3055442 (1962-09-01), Prince
patent: 4280572 (1981-07-01), Schmid et al.
patent: 4290496 (1981-09-01), Briggs
patent: 4313570 (1982-02-01), Olson
patent: 4369850 (1983-01-01), Barker
patent: 4610321 (1986-09-01), Whaling

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