Mechanical plug drill

Details Mechanical plug drill Mechanical plug drill

1984-03-12

1985-12-03

Desmond, Eugene F.

Metal working

Plural diverse manufacturing apparatus including means for...

Binding or covering and cutting

294265, 29726, 408 58, 408130, B23B 4504

Patent

active

045558337

ABSTRACT:
A device for removing plugs from plugged tubes in a steam generator including a frame having a substantially flat plate, with a hollow drill bit mounted thereon and movable generally perpendicularly with respect thereto from a storage position to an operating position. An elongated retaining pin extends through the hollow drill bit and therebeyond having threads on one end thereof for attachment to the plug to be drilled. Actuating means moves the drill bit between the storage position thereof and the operating position thereof, motor means is mounted on the frame for rotating the drill bit. An air-water mixture is introduced near where the drill bit meets the plug to be drilled, the water being present in an amount of about one-half volume percent, and a vacuum is used to collect and remove the air-water mixture and any debris entrained therewith due to drilling the associated plug.

REFERENCES:
patent: 3704074 (1972-11-01), Deschner
patent: 4369569 (1983-01-01), Armstrong et al.
patent: 4443139 (1984-04-01), Eash
patent: 4498820 (1985-02-01), Brennan

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