Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1988-02-05
1989-08-01
Kyle, Deborah L.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367172, 367174, 181120, H04R 2300
Patent
active
048539058
ABSTRACT:
A marine seismic vibrator includes a housing having first and second housing portions defining an internal chamber therebetween. A hydraulic cylinder or other energizing device is connected between the first and second housing portions. The first and second housing portions are maintained in a spaced apart, non-contacting relationship. Relative motion between the first and second housing portions is provided by the hydraulic cylinder in order to generate acoustic waves in a surrounding body of water. An annular flexible seal construction is connected between the first and second housing portions for isolating the internal chamber from the surrounding body of water. This seal construction includes first and second flexible web portions sealingly connected to the first and second housing portions. A rigid hoop is connected between the first and second web portions for supporting the seal against pressure differentials between the internal chamber and the surrounding body of water. This hoop preferably has an axial length substantially greater than a radial thickness thereof. The first web portion of the seal extends from the first housing portion toward the second housing portion, then radially toward the rigid hoop, then away from the second housing portion, then again toward the rigid hoop, thus defining a serpentine cross section to accommodate relative motion between the first and second housing portions by bending deformation of said serpentine cross section.
REFERENCES:
patent: 2921477 (1960-01-01), Hanggi
patent: 3390737 (1968-07-01), Johnson
patent: 3392369 (1968-07-01), Dickie et al.
patent: 3449712 (1969-06-01), Angeloff
patent: 3676840 (1972-07-01), Bays
patent: 3781779 (1973-12-01), Tallman
patent: 3792425 (1974-02-01), Magneville et al.
patent: 4153134 (1979-05-01), Yang
patent: 4252210 (1981-02-01), Sodich
patent: 4383591 (1983-05-01), Ogura
Conoco Inc.
Eldred J. Woodrow
Kyle Deborah L.
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