Device for causing an untuned structure to vibrate ultrasonically

Patent 5386169 Issued on January 31, 1995. Estimated Expiration Date:

July 19, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3027690

3117768

3173043

3628071

Liquid atomizing apparatus utilizing ultrasonic wave
Patent #: 4019683
Issued on: 04/26/1977
Inventor: Asai , et al.

Resonant cylindrically shaped ultrasonic wave generator
Patent #: 4034244
Issued on: 07/05/1977
Inventor: Asai, et al.

Ultrasonic wave generator
Patent #: 4074152
Issued on: 02/14/1978
Inventor: Asai , et al.

Multi-frequency ultrasonic transducer
Patent #: 4490640
Issued on: 12/25/1984
Inventor: Honda

Piezoelectric apparatus for activating square plate resonator
Patent #: 4620121
Issued on: 10/28/1986
Inventor: Mishiro

Sieving apparatus
Patent #: 5143222
Issued on: 09/01/1992
Inventor: Monteith

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Inventor

Dubruque, Dominique

Application

No. 090134 filed on 07/19/1993

US Classes:

310/323.19, Horn or transmission line209/346, With vertical shake209/365.1, Reciprocating310/325Sandwich or Langevin type

Examiners

Primary: Budd, Mark O.

Attorney, Agent or Firm

Jacobson, Price, Holman & Stern

Foreign Patent References

2233108 FR. 10/13/1975
2424007 DE. 11/13/1975
3813176 DE. 04/13/1988
2167270 GB. 05/13/1986

International Class

H01L 041/08

Foreign Application Priority Data

1991-01-17 FR

Abstract

The present invention relates to the vibration of an untuned structure by means of an ultrasound converter. The main but not unique purpose is to cause a filtering cloth, a perforated metal sheet or a screening mesh to vibrate in order to improve the flow rate in the filtering or sieving process, with equal surface energy, without clogging the mesh or harming the product being processed. The device according to the invention is characterized in that it comprises at least one electro-acoustic converter (12) ridigly fixed to said structure (10) by means of metallic securing elements (14) tuned to the frequency of the converter, the links with the structure being in a maximum region of amplitude (V)j of said securing elements and resonance of the assembly being provided by a nut or any metallic unit tuned as an integral multiple of a half wave length.