EP0053947A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ultrasonic transducer
Assignee: Panasonic Holdings Corp
•
Filing: 1981-12-10
•
Granted: —
•
Expires: 2001-12-10
Abstract
Abstract An ultrasonic transducer is characterized in that a diaphragm (13) is disposed at the centre of a laminated piezo-electric element (11) and the periphery of the diaphragm (13) is flexibly fixed to a housing (17) for the element (11) through a buffer member (20) of a resilient material such as elastic rubber in order to suppress mechanical oscillation.
Inventors
- 👤 Ryoichi Takayama
- 👤 Yukihiko Ise
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 18:28
CPC Classifications
G; G10; G10K; G10K9/00; G10K9/12; G10K9/122; H; H04; H04R; H04R17/00; H04R17/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
An ultrasonic transducer comprising a laminated piezo-electric element (11) having a diaphragm (13) at its central portion, and a housing (17) for accommodating said laminated piezo-electric element therein, characterized in that a buffer member (20) is disposed in contact with a peripheral portion of said diaphragm (13) and an inner side wall of said housing (17), wherein said diaphragm (13) is flexibly fixed and held within said housing (17) through the use of said buffer member (20).
Claim 2
Dependent Claim
77 words
An ultrasonic transducer comprising a laminated piezo-electric element (11) having a diaphragm (13) at its central portion, and a housing (17) for accommodating said laminated piezo-electric element therein, characterized in that a buffer member (20) is disposed in contact with a peripheral portion of said diaphragm (13) and an inner side wall of said housing (17), wherein said diaphragm (13) is flexibly fixed and held within said housing (17) through the use of said buffer member (20).
Claim 3
Dependent Claim
31 words
An ultrasonic transducer according to claim 1, characterized in that said diaphragm (13) is of a conical configuration and said laminated piezo-electric element (11) is in the form of a disc.
Claim 4
Dependent Claim
26 words
An ultrasonic transducer according to claim 2, characterized in that said conical diaphragm (13) has a ratio of height to bottom diameter within 0.3 through 0.5.
Claim 5
Dependent Claim
21 words
An ultrasonic transducer according to claim 1, cheracterized in that an acoustic absorbent material (26) is disposed within said housing (17).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.