Device for coupling a rod for drilling a taphole

Details Device for coupling a rod for drilling a taphole Device for coupling a rod for drilling a taphole

1990-06-14

1991-10-15

Briggs, William

Cutting by use of rotating axially moving tool

Tool-support

With tool-retaining means

266271, 279 28, B23B 3110, F27D 315

Patent

active

050569686

ABSTRACT:
The device includes a chuck designed to be secured to a working tool and which has a front cavity for receiving an end of a drilling rod and a gripping device for fastening the end of the rod in this cavity. The gripping device is actuated by pneumatic or hydraulic pistons, sliding in a cylindrical chamber closed at the rear by a plug. In order to avoid rapid wear of this plug, a spring is arranged between the said plug and the adjacent face of the piston, the spring being strong enough to keep the piston away from the plug.

REFERENCES:
patent: 3862750 (1975-01-01), Broom
patent: 4227682 (1980-10-01), Ulveling et al.
patent: 4589636 (1986-05-01), Baumer et al.
patent: 4682780 (1987-07-01), Kurama et al.
patent: 4893794 (1990-01-01), Maillet

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