Coating processes – Electrical product produced – Piezoelectric properties
Reexamination Certificate
2006-08-08
2006-08-08
Talbot, Brian K. (Department: 1762)
Coating processes
Electrical product produced
Piezoelectric properties
C427S379000, C029S025350
Reexamination Certificate
active
07087264
ABSTRACT:
It is an object of the present invention to provide an ultrasonic transducer, which is so configured as to reduce the variations in characteristics, thereby to enable the stabilization of the precision, as well as to enable the improvement of the durability, and the like, a method for manufacturing the ultrasonic transducer, and an ultrasonic flowmeter. In order to attain this object, in accordance with the present invention, the ultrasonic transducer is so configured as to include a piezoelectric element and an acoustic matching layer, wherein the acoustic matching layer is made of a dry gel of an inorganic oxide or an organic polymer, and a solid skeletal part of the dry gel has been rendered hydrophobic. With this configuration, it is possible to obtain the ultrasonic transducer having an acoustic matching layer3which is very lightweight and has a small acoustic impedance due to the solid skeletal part of the dry gel which has been rendered hydrophobic. Further, it is also possible to obtain the ultrasonic transducer which shows a narrow range of characteristic variations, and is stable due to the high homogeneity of the dry gel.
REFERENCES:
patent: 3487137 (1969-12-01), Kopel
patent: 3546012 (1970-12-01), Coleman et al.
patent: 4523122 (1985-06-01), Tone et al.
patent: 4762591 (1988-08-01), Samuelson
patent: 4783888 (1988-11-01), Fujii et al.
patent: 5143636 (1992-09-01), Gaucher et al.
patent: 5434827 (1995-07-01), Bolorforosh
patent: 5437194 (1995-08-01), Lynnworth
patent: 6106474 (2000-08-01), Koger et al.
patent: 6280388 (2001-08-01), Koger et al.
patent: 6508133 (2003-01-01), Adachi et al.
patent: 0640564 (1994-08-01), None
patent: 2-141194 (1990-11-01), None
Hashida Takashi
Hashimoto Masahiko
Suzuki Masa-aki
Browdy and Neimark PLLC
Matsushita Electric - Industrial Co., Ltd.
Talbot Brian K.
LandOfFree
Ultrasonic transducer, method for manufacturing ultrasonic... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic transducer, method for manufacturing ultrasonic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic transducer, method for manufacturing ultrasonic... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3689638