Ultrasonic resonant device
First Claim
Patent Images
1. An ultrasonic transducer comprising:
- a resonant member having a Q- factor greater than 300 and asymmetrically tapered to a thin edge portion; and
an electrically actuated driver mounted on said resonant member for driving said resonant member in the resonant frequency range of said resonant member for causing said resonant member to resonate in an open node line pattern which intersects with said thin edge portion.
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Accused Products
Abstract
An ultrasonic wave generator includes a resonant member tapered to a thin edge, the member having a Q of about 300 or more.
119 Citations
19 Claims
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1. An ultrasonic transducer comprising:
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a resonant member having a Q- factor greater than 300 and asymmetrically tapered to a thin edge portion; and an electrically actuated driver mounted on said resonant member for driving said resonant member in the resonant frequency range of said resonant member for causing said resonant member to resonate in an open node line pattern which intersects with said thin edge portion. - View Dependent Claims (2, 3, 4, 5)
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6. An atomizer for converting a liquid into a vapor comprising:
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a resonant member tapered to a thin edge portion and having a Q-factor greater than 300, and a stiffness to density ratio greater than 2×
109 dyne-cm/gram;a driver directly coupled to said resonant member; means for applying a pulsating voltage to said driver for causing said resonant member to resonate in an open node line pattern which intersects with said thin edge portion; and supply means for supplying said liquid to said resonant member adjacent said thin edge portion at a flow rate to produce atomization of said liquid. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An ultrasonic air blower comprising:
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a resonant member tapered to a thin edge portion and having a Q-factor greater than three hundred, and a stiffness to density ratio greater than 2×
109 dyne-cm/gram;a thin piezoelectric driver having a substantially smaller mass than said resonant member and mounted thereon; and means for applying a pulsating voltage to said driver in the resonant range of said resonant member for vibrating said resonant member in a open node line pattern which intersects with said thin edge portion to induce motion of said air. - View Dependent Claims (18)
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19. An atomizer for converting a liquid into a vapor comprising:
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a resonant member asymmetrically tapered to a thin edge portion and having a Q-factor greater than 300, and a stiffness to density ratio greater than 2×
109 dyne-cm/gram;a driver directly coupled to said resonant member, said driver including a thin piezoelectric element having a substantially smaller mass than said resonant member; means for applying a pulsating voltage to said driver for causing said resonant member to resonate in an open node line pattern which intersects with said thin edge portion; and supply means for supplying said liquid to said resonant member adjacent said thin edge portion at an anti-node of said resonant member and at a flow rate to produce atomization of said liquid.
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Specification