Seismic transducer construction

Details Seismic transducer construction Seismic transducer construction

1977-11-03

1979-03-13

Moskowitz, Nelson

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

340 155SW, G01V 114

Patent

active

041437365

ABSTRACT:
The present invention relates to a seismic transducer for generating waves in an elastic medium and is particularly applicable to the generation of low frequency shear waves. The transducer is comprised of a mass member having more than one parallel hydraulic cylinder disposed therein, a piston member disposed in each cylinder, each piston member including a piston and a pair of oppositely extending rods, and a frame interconnecting the ends of the piston rods which frame has a base surface thereon for engaging a surface of the elastic medium in energy coupling relationship. A system of hydraulic fluid bleed-back ports associated with the piston members serve to aid lubrication and keep high pressures off of the rod end seals. The present construction permits total enclosure of the mass member and plural piston member assembly.

REFERENCES:
patent: 3159233 (1964-12-01), Clynch et al.
patent: 3287696 (1966-11-01), Cholet
patent: 3745885 (1973-07-01), Fair et al.
patent: 3789951 (1974-02-01), Silverman
patent: 3860087 (1975-01-01), Silverman
patent: 3983957 (1976-10-01), Silverman

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