EP0355694A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Piezoelectric composite transducer for use in ultrasonic probe
Assignee: Panasonic Holdings Corp
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Filing: 1989-08-16
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Granted: —
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Expires: 2009-08-16
Abstract
Abstract There is herein disclosed a piezoelectric composite transducer comprising a plurality of piezoelectric ceramic poles (1). The plurality of piezoelectric ceramic poles (1) are arranged two-dimensionally so as to form spaces (3) therebetween. Organic films (2) are disposed on both end surfaces of the plurality of piezoelectric ceramic poles (11) so that the spaces forms hollow portions (3). The hollow portions (3) causes making small its acoustic impedance up to a value close to the acoustic impedance of water or a human body.
Inventors
- 👤 Koetsu Saito
- 👤 Masami Kawabuchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 12:50
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/22; G01N29/24; G01N29/2437; G01N29/245; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0607; B06B1/0622
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
17 words
A piezoelectric composite transducer comprising a plurality of piezoelectric ceramic members, an organic material and hollow portions.
Claim 2
Dependent Claim
17 words
A piezoelectric composite transducer comprising a plurality of piezoelectric ceramic members, an organic material and hollow portions.
Claim 3
Dependent Claim
51 words
A piezoelectric composite transducer as claimed in claim 1, wherein each of said plurality of piezoelectric ceramic members has a pole-like configuration and said plurality of piezoelectric ceramic members are arranged two-dimensionally and held by said organic material, said hollow portions being formed in spaces between said plurality of piezoelectric members.
Claim 4
Dependent Claim
36 words
A piezoelectric composite transducer as claimed in claim 1, wherein said plurality of piezoelectric ceramic members are arranged two-dimensionally, and said organic material includes microballoons and fills up spaces between said plurality of piezoelectric ceramic members.
Claim 5
Dependent Claim
24 words
A piezoelectric composite transducer as claimed in claim 1, wherein said organic material is one selected from synthetic rubber, epoxy resin and polyurethane rubber.
Claim 6
Dependent Claim
39 words
A piezoelectric composite transducer as claimed in claim 1, wherein said plurality of piezoelectric ceramic members are arranged two-dimensionally, and said organic material is a foaming organic material and fills up spaces between said plurality of piezoelectric ceramic members.
Claim 7
Dependent Claim
25 words
A piezoelectric composite transducer as claimed in claim 5, wherein said foaming organic material is one selected from foaming polyurethane resin and foaming silicon rubber.
Claim 8
Dependent Claim
18 words
A piezoelectric composite transducer comprising a plurality of porous piezoelectric ceramic members, an organic material and hollow portions.
Claim 9
Dependent Claim
18 words
A piezoelectric composite transducer comprising a plurality of porous piezoelectric ceramic members, an organic material and hollow portions.
Claim 10
Dependent Claim
53 words
A piezoelectric composite transducer as claimed in claim 7, wherein each of said plurality of porous piezoelectric ceramic members has a pole-like configuration and has therein hollows, and said plurality of porous piezoelectric ceramic members are arranged two-dimensionally so as to form spaces therebetween, said spaces being filled up with said organic material.
Claim 11
Dependent Claim
59 words
A piezoelectric composite transducer as claimed in claim 7, wherein each of said plurality of porous piezoelectric ceramic members has a pole-like configuration and has therein hollows, and said plurality of porous piezoelectric ceramic members are arranged two-dimensionally so as to form spaces therebetween and fixed by said organic material so that said spaces therebetween form said hollow portions.
Claim 12
Dependent Claim
56 words
A piezoelectric composite transducer as claimed in claim 7, wherein each of said plurality of porous piezoelectric ceramic members has a pole-like configuration and has therein hollows, and said plurality of porous piezoelectric ceramic members are arranged two-dimensionally so as to form spaces therebetween, and said organic material includes microballoons and fills up said spaces therebetween.
Claim 13
Dependent Claim
24 words
A piezoelectric composite transducer as claimed in claim 7, wherein said organic material is one selected from synthetic rubber, epoxy resin and polyurethane rubber.
Claim 14
Dependent Claim
59 words
A piezoelectric composite transducer as claimed in claim 7, wherein each of said plurality of porous piezoelectric ceramic members has a pole-like configuration and has therein hollows, and said plurality of porous piezoelectric ceramic members are arranged two-dimensionally so as to form spaces therebetween, and said organic material is a foaming organic material and fills up said spaces therebetween.
Claim 15
Dependent Claim
25 words
A piezoelectric composite transducer as claimed in claim 12, wherein said foaming organic material is one selected from foaming polyurethane resin and foaming silicon rubber.
Claim 16
Dependent Claim
49 words
A piezoelectric composite transducer comprising: a plurality of piezoelectric ceramic poles which are arranged two-dimensionally so as to form spaces therebetween; and at least one organic member disposed on one end surface of said plurality of piezoelectric ceramic poles so that hollow portions are formed by said spaces therebetween.
Claim 17
Dependent Claim
49 words
A piezoelectric composite transducer comprising: a plurality of piezoelectric ceramic poles which are arranged two-dimensionally so as to form spaces therebetween; and at least one organic member disposed on one end surface of said plurality of piezoelectric ceramic poles so that hollow portions are formed by said spaces therebetween.
Claim 18
Dependent Claim
20 words
A piezoelectric composite transducer as claimed in claim 14, wherein an organic material is partially provided in said hollow portions.
References Cited (Backward Citations)
No citation records indexed.
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