Sonic fine-hole forming apparatus

Details Sonic fine-hole forming apparatus Sonic fine-hole forming apparatus

2011-04-12

2011-04-12

Lucchesi, Nicholas D (Department: 3763)

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

C604S020000

Reexamination Certificate

active

07923897

ABSTRACT:
Disclosed is a sonic fine-hole forming apparatus for forming a fine-hole in a surface of a membrane or solid body in a liquid by means of sonic energy. The sonic fine-hole forming apparatus is adapted to generate a sonic oscillation driving signal comprises a voltage waveform which has positive and negative voltage portions being asymmetrical, and a sharp peak portion. The sonic fine-hole forming apparatus includes a sonic oscillation section having a surface provided with a covering layer or a protective material having an electrically insulating property and a sonic transparency. The coated layer or a protective material is formed to have a thickness of 10 μm or more. The sonic fine-hole forming apparatus of the present invention can form a fine-hole in a surface of a solid body without using a large-scale apparatus, while suppressing a destructive action around the fine-hole.

REFERENCES:
patent: 6096000 (2000-08-01), Tachibana et al.
patent: 6487447 (2002-11-01), Weimann et al.
patent: 6528039 (2003-03-01), Unger
patent: 6676963 (2004-01-01), Lanza et al.
patent: 11-009701 (1999-01-01), None
patent: 2004/520852 (2004-07-01), None
patent: WO-01/32232 (2001-05-01), None

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