Wide dynamic range hydraulic vibrator

Details Wide dynamic range hydraulic vibrator Wide dynamic range hydraulic vibrator

1984-08-27

1987-02-10

Jordan, Charles T.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

367143, 367189, 92 2, 92 131, G01V 104, H04R 102, H04R 1100, F01B 3114

Patent

active

046417257

ABSTRACT:
An apparatus for incremental cylinder length control in a hydraulic vibrator of the type having a reaction mass with a cylinder bore disposed therein, first and second end sleeves disposed in sealed movable position in the ends of the cylinder, a piston rod sealed and slidably disposed through the first and second sleeves with a piston attached to the piston rods where the improvement comprises threading the ends of the cylinder bore and forming mating threads on the first and second sleeves with means for rotating the sleeves with respect to the cylinder so that the sleeves move toward or away from the piston thereby reducing the volume of hydraulic oil between the end of the piston and the end sleeves.

REFERENCES:
patent: 356538 (1887-01-01), Hubner
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patent: 3422926 (1969-01-01), Stanaway
patent: 3626807 (1971-12-01), Shartzer
patent: 3815480 (1974-06-01), Spyra
patent: 3905279 (1975-09-01), Yadon
patent: 3978884 (1976-09-01), Sundstrom
patent: 3997022 (1976-12-01), Cholet
patent: 4106586 (1978-08-01), Stafford
patent: 4164264 (1979-08-01), Fair
patent: 4388981 (1983-06-01), Fair
patent: 4428238 (1984-01-01), Tauscher

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