Solid material comminution or disintegration – Processes – Miscellaneous
Reexamination Certificate
2006-07-04
2006-07-04
Francis, Faye (Department: 3725)
Solid material comminution or disintegration
Processes
Miscellaneous
C241S274000
Reexamination Certificate
active
07070133
ABSTRACT:
A silo bin drilling system used for unclogging bulk material in a silo bin. The drilling system includes a hydraulic drill with drill motor. The drill is mounted above an access hole in a top portion of the bin. An access door in a bottom of the bin is used for forming a lower bin cavity in the material. The system also includes a pipe string. The pipe string is attached to a pipe string motor. A bottom of the pipe string is attached to a drill bit with foldable blades. The drill bit is used for drilling a cavity access hole through the clogged bulk material into the lower bin cavity. The pipe string motor then moves the drill bit with unfolded blades upwardly through the material drilling a large diameter raise hole until the clogged material collapses in the bin.
REFERENCES:
patent: 3220494 (1965-11-01), Cannon et al.
patent: 3968998 (1976-07-01), Wolf
patent: 4198186 (1980-04-01), Holdren et al.
patent: 5074478 (1991-12-01), Fujiwara et al.
patent: 5975447 (1999-11-01), Brusseau
Crabtree Edwin H.
Francis Faye
Pizarro Ramon L.
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