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US Patent 7607287 Airfoil acoustic impedance control

Patent 7607287 was granted and assigned to United Technologies on October, 2009 by the United States Patent and Trademark Office.

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Patent attributes

Current Assignee

United Technologies

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Patent Jurisdiction

United States Patent and Trademark Office

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Patent Number

Patent Inventor Names

Bruce L. Morin0

Ramons A. Reba0

Stephen A. Morford0

Wesley K. Lord0

Date of Patent

October 27, 2009

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Patent Application Number

118074460

Date Filed

May 29, 2007

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Patent Citations Received

US Patent 11781485 Unit cell resonator networks for gas turbine combustor tone damping

US Patent 12104536 Nacelle liner comprising unit cell resonator networks

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US Patent 11804206 Acoustic panel for noise attenuation

Patent Primary Examiner

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Patent abstract

A noise control cassette for a gas turbine engine includes a perforated face sheet configured for exposure to an airflow, a non-perforated backing sheet, a core arranged between the face sheet and the backing sheet and defining a cavity between the face sheet and the backing sheet having an effective length tuned so as to provide acoustic reactance control, and an attachment face for attaching the cassette to an airfoil-shaped structure.

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