Electric sparking drill and method for forming a hole with...

Details Electric sparking drill and method for forming a hole with... Electric sparking drill and method for forming a hole with...

2005-01-18

2005-01-18

Evans, Geoffrey S. (Department: 1725)

Electric heating

Metal heating

Cutting or disintegrating

C219S069130, C219S069140

Reexamination Certificate

active

06844519

ABSTRACT:
An electric sparking drill and a method for using the same to drill a hole in a workpiece where at least one of a voltage applied to an electrode, the conductivity of a liquid applied between the electrode and the workpiece during drilling, and a gap between the electrode and the workpiece are controlled to create the desired hole in the workpiece. The electric sparking drill and a method for using the same to drill a hole in a workpiece also improve the hole operation and/or the quality of the hole made by operating at the arcing voltage, including a touch stop function, including a sacrificial electrode, and/or including a guide member function.

REFERENCES:
patent: 3417006 (1968-12-01), Inoue
patent: 4767903 (1988-08-01), Sciaroni
patent: 54-34197 (1979-03-01), None
patent: 61-111843 (1986-05-01), None
patent: 62-181826 (1987-08-01), None
patent: 4-283022 (1992-10-01), None

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