Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1985-02-15
1987-03-17
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
310334, 310336, H04R 1700, G01F 166
Patent
active
046497544
ABSTRACT:
A high pressure transducer for transmitting and/or receiving sonic energy, the transducer having a housing with a cylindrical opening, a metallic acoustic window element closing one end of the opening, a cylindrical transducer crystal having one planar surface in engagement with the acoustic window rearward face, a thrust producing compression screw threadably received in the cylindrical opening supplying pressure through dampening means to the crystal rearward face to force the crystal into intimate engagement with the acoustic window, the acoustic window having a thickness of about N times 1/2 of the wavelength of crystal produced sound in the acoustic window, N being the least whole number providing an acoustic window having strength to withstand the pressure to which the transducer is subjected without significant deformation.
REFERENCES:
patent: Re29785 (1978-09-01), Leschek et al.
patent: 3771117 (1973-11-01), Shaffer et al.
patent: 3890423 (1975-06-01), Zacharias, Jr.
patent: 3973152 (1976-08-01), Karplus
patent: 4162111 (1979-07-01), Brown
Nusonics, Inc.
Ruehl Charles A.
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