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 Title: |
EP1060798A1:
Unidirectional single piston ultrasonic transducer[German][French]
[ Derwent Title ]
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Country:
Kind: |
EP European Patent Office (EPO)
A1 APPLICATION PUBLISHED WITH SEARCH REPORT i
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| Inventor: |
Miodrag Prokic;
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| Assignee: |
Miodrag Prokic
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| Published / Filed: |
2000-12-20
/ 1999-06-18
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| Application Number: |
EP1999000810539
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| IPC Code: |
Advanced:
B06B 1/06;
B06B 3/00;
Core:
more...
IPC-7:
B06B 1/06;
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| ECLA Code: |
B06B1/06C2; B06B3/00;
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| Priority Number: |
| 1999-06-18 |
EP1999000810539 |
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| Abstract: |
Unidirectional sandwich transducer which includes a center mass (4) freely placed between two active transducer element stacks (2' and 2") and two end masses (3',3") where all of them are coupled only by rigid stress rod between two end masses and where one of two active transducer element stacks can be replaced by solid and acoustically passive isolator stack. The center mass is performing free and not attenuated single piston oscillations between two active transducer element stacks and two end masses realized by mutually opposite phase polarity of active transducer elements while driven by the same input electrical signal. The center mass is also performing free and not attenuated single piston oscillations between one active transducer element stack and one solid and acoustically passive isolator stack and two end masses. The transducer is using electrical and emitting acoustic energy only when placed in contact with some external mass and shape and size of externally contacted mass have no influence to transducer's center mass vibrations. When center mass is performing single piston movement and when transducer is not mechanically loaded the total transducer length is constant and two end masses are not oscillating. The transducer is ideal for agitating arbitrary distant and arbitrary shaped liquid and solid masses placed in different vessels or pipes transferring its vibrations via waveguide solid rod connected between the transducer and a loading mass. The single piston transducer connected perpendicularly to a solid tube can agitate different radial and circumferential tube vibration modes without the need of exciting longitudinal and axial tube modes. The transducer can also be used as vibration receiver or sensor.
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| INPADOC Legal Status: |
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| Designated Country: |
AL AT BE CH CY DE DK ES FI FR GB GR IE IT LI LT LU LV MC MK NL PT RO SE SI
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| Family: |
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First Claim:
Show all claims |
1. A single isolated-piston vibrating middle mass transducer, comprising:
- first and second head masses in contact with an acoustic medium;
- first and second active transducer elements oppositely polarized and respectively bordering said first and second head masses; and
- middle mass, bordering said first and second active transducer elements, for transferring vibration between said first and second transducer elements, and allowing vibration by said middle mass to be alternatively enhanced by the vibration of the both of said active transducer elements oppositely polarized and always operating in a mutually opposite phase, and producing single piston movement of the middle mass.
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Description
Expand description |
+ Prior Art (known patents and designs):
All double piston, single-element or multi-elements sandwich acoustic transducers, piezoelectric and magnetostrictive stacks, and all types of traditional Bolted Langevin Transducers, as well as Ultrasonic Cleaning and Ultrasonic Welding transducers belong to the Prior Art in the field of acoustic transducers. Double piston oscillating mode (axial both side contraction-extension mode) is an essential characteristic of all Prior Art transducers.
+ European patents:
+ Applicant: Gould Inc. Inventor: Thompson, Stephen
+ BACKGROUND OF THE INVENTION:
+ Important characteristics of single piston transducers (the current invention) are:
+ Important advantages of single piston transducers (the current invention) are:
+ SUMMARY OF THE INVENTION:
+ Brief Description of the Drawings:
+ DESCRIPTION OF THE PREFERED EMBODIMENTS:
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