US 8,068,626 B2Granted

Thermoacoustic device

AssigneesBeijing FUNATE Innovation Technology Co., Ltd., Hon Hai Precision Industry Co., Ltd.

InventorsKai-Li Jiang, Lin Xiao, Zhuo Chen, Shou-Shan Fan, Chen Feng, Yuan-Chao Yang

Life of this patent

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Abstract

An apparatus, the apparatus includes an electromagnetic signal device; a medium; and a sound wave generator. The sound wave generator includes a carbon nanotube structure. The carbon nanotube structure includes one or more carbon nanotube films. Each carbon nanotube film includes a plurality of carbon nanotubes substantially parallel to each other and joined side by side via van der Waals attractive force. The electromagnetic signal device transmits an electromagnetic signal to the carbon nanotube structure. The carbon nanotube structure converts the electromagnetic signal into heat. The heat transfers to the medium causing a thermoacoustic effect.

Claims20

Dependent claims

An apparatus, the apparatus comprising:

an electromagnetic signal device;
and
a sound wave generator, the sound wave generator comprises a carbon nanotube structure, the carbon nanotube structure comprises one or more carbon nanotube films, each carbon nanotube film comprises a plurality of carbon nanotubes substantially parallel to each other and joined side by side via van der Waals attractive force;
wherein the electromagnetic signal device is configured to transmit an electromagnetic signal to the carbon nanotube structure, the carbon nanotube structure is configured to convert the electromagnetic signal into heat and transfer the heat to a medium in contact with the sound wave generator, causing a thermoacoustic effect.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 12/459,564Filed 2 Jul 2009 · continuation
Priority: CN 2008 1 006669328 Apr 2008
Published: US 2010/0098273 A122 Apr 2010
Granted: 29 Nov 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04R 23/002
Transducers other than those covered by groups H04R9/00 - H04R21/00: using electrothermic-effect transducer
B06B 1/02
Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency: making use of electrical energy
H04R
Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers
B06B
Methods or apparatus for generating or transmitting mechanical vibrations of infrasonic, sonic

Family

Application12/387,089Parent of this continuation-in-part · filed 28 Apr 2009
Application12/455,606Parent of this continuation · filed 4 Jun 2009
US 2010/0098273 A1Pre-grant publication · published 22 Apr 2010
Application12/455,606Parent of this continuation-in-part
US 2009/0268556 A1Published application
US 2009/0296528 A1Published application
US 8,068,624 B2Related patent
US 8,249,279 B2Related patent
US 8,068,626 B2This patent

From the US filing history. Foreign family members aren’t listed.