Percussion drill rod

Details Percussion drill rod Percussion drill rod

1974-06-25

1978-06-13

Purser, Ernest R.

Tool driving or impacting

Work cleansing

Cleansing fluid passage in impact transmitting anvil

173126, 175293, E21B 106

Patent

active

040943640

ABSTRACT:
In the percussion drill rod assembly of the present invention rotary force is transmitted through a tubular member of the assembly while impact force is transmitted through the rod member centrally located in the tubular member. Either of said rod and tubular members is provided with radially extending protrusions which guide said member with respect to the other member while enabling flushing medium to pass between said members.

REFERENCES:
patent: 349192 (1886-09-01), Woodhouse
patent: 1006661 (1911-10-01), Knapp
patent: 1559709 (1925-11-01), Knapp
patent: 1583262 (1926-05-01), Smith
patent: 1868684 (1932-07-01), Bayles
patent: 2188119 (1940-01-01), Prentice
patent: 2725264 (1955-11-01), Bodine, Jr.
patent: 3720272 (1973-03-01), Hunter

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