Method of fabricating ultrasonic coupler
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United States of America Patent
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-
Mar 16, 1999
Issued Date -
N/A
app pub date -
Jul 5, 1996
filing date -
Dec 15, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of fabricating an ultrasonic coupler to a specified configuration such that the ultrasonic coupler is fabricated by freezing and defrosting an aqueous solution containing a polymer. A surface of the fabricated ultrasonic coupler is made to be smooth. The ultrasonic coupler is fabricated using an ultrasonic coupler fabricating die including members each made of silicone rubber which varies in compliance with the expansion and the contraction of the aqueous solution. To fabricate the ultrasonic coupler, the aqueous solution containing a polyvinyl alcohol (PVA) is poured into the die. Then, the die is subjected to the process of cooling to below the freezing point and the process of recovery to room temperature so as to progress a bridging of the PVA, thereby progressing a gelling of the aqueous solution.
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