Ultrasonic transducer for use in a fluid medium

US8596139B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Roland Mueller · Caledon East, CA
• Gerhard Hueftle · Aspach, DE
• Michael Horstbrink · Kornwestheim, DE
• Tobias Lang · Stuttgart, DE
• Sami Radwan · Stuttgart, DE
• Bernd Kuenzl · Schwieberdingen, DE
• Roland Wanja · Markgröningen, DE

Key dates

• Filing date: Nov 17, 2009
• Grant date: Dec 3, 2013
• Expiry date: Jun 9, 2030

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/42
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An ultrasonic transducer is described for use in a fluid medium. The ultrasonic transducer includes at least one piezoelectric transducer element and at least one matching element for promoting an oscillation injection between the piezoelectric transducer element and the fluid medium. The ultrasonic transducer also includes a housing (112), the piezoelectric transducer element being inserted in the housing. The housing has at least one opening facing the fluid medium, the matching element being inserted at least partially into the opening. The ultrasonic transducer also has at least one sealing element, which seals at least one intervening space between the matching element and the housing in such a way that an inner space of the housing is at least largely sealed from the fluid medium.