Dual-mode hydraulic vibrator

Details Dual-mode hydraulic vibrator Dual-mode hydraulic vibrator

1984-04-20

1986-12-30

Brown, David H.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

181119, 181121, 181401, 367 75, 367189, G01V 1047, G01V 1133

Patent

active

046322159

ABSTRACT:
A dual-mode vibrator for alternately injecting P-waves and S-waves in the earth including a hydraulically driven shaker assembly, a ground-contacting base plate, and a jacking means for raising and lowering the base plate relative to a vehicle. The shaker assembly is supported above, and coupled to the base plate by a supporting means. The supporting means has a first configuration for coupling the shaker assembly to the base plate for generating P-waves and a second configuration for pivotally coupling the shaker assembly to the base plate and to a rigid member associated with the vehicle for injecting S-waves.

REFERENCES:
patent: 3053351 (1962-09-01), Fulcher
patent: 3159233 (1964-12-01), Clynch et al.
patent: 3306391 (1967-02-01), Bays
patent: 3884324 (1975-05-01), Hamilton et al.
patent: 4244437 (1981-01-01), Falkerson
patent: 4291780 (1981-09-01), Falkerson
patent: 4321981 (1982-03-01), Waters
patent: 4354572 (1982-10-01), Martin
patent: 4421198 (1983-12-01), Miller

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