Boring or penetrating the earth – Tool removable or insertable through or around driving or...
Patent
1993-08-27
1994-07-05
Novosad, Stephen J.
Boring or penetrating the earth
Tool removable or insertable through or around driving or...
299 48, 299 52, B23B 3120, B23B 31165, B23B 31173, E21B 300
Patent
active
053259319
ABSTRACT:
This invention relates to a chuck assembly for a drill box of a mine drill for releasably securing a mining tool including a working end and a depending rod-like member for roof bolting and roof and face drilling operations and a method of using the chuck assembly. The drill box includes a source of rotary power and a drive member operatively connected to the source of rotary power to rotatably drive the chuck assembly. The chuck assembly includes a spindle, a collet closer and a collet. The spindle is operatively connected to the drive member and has a sleeve of a cylindrical shape including a threaded collar end and a bottom end and an opening extending a selected distance from the collar end to the bottom end. The collet closer includes an annular housing having an aperture threaded for threadingly engaging the threaded collar end of the spindle. The collet includes a forward end portion and an opposing tapered rear end portion and an internal bore capable of receiving the rod-like member of the mining tool. The collet extends a selected distance within the opening of the sleeve such that the collet closes uniformly around the rod-like member of the mining tool as the collet is compressed within the opening of the sleeve by the action of the collet closer threadingly engaging the threaded collar end.
REFERENCES:
patent: 2885211 (1959-05-01), Sima
patent: 3227230 (1966-01-01), Lagerstrom
patent: 3451686 (1969-06-01), Hammond
patent: 4640517 (1987-02-01), Lovatt
patent: 4817972 (1989-04-01), Kubo
patent: 4878549 (1989-11-01), Bennet
patent: 5032043 (1991-07-01), Hollifield
Kennametal Inc.
Novosad Stephen J.
Porcelli James G.
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