Variable cylinder hydraulic vibrator and control system

Details Variable cylinder hydraulic vibrator and control system Variable cylinder hydraulic vibrator and control system

1984-10-03

1989-07-25

Buczinski, Stephen C.

Acoustics

Geophysical or subsurface exploration

Seismic wave generation

91 39, 91216B, 91266, 92 131, 92 136, 181114, 181120, 367189, G01V 114

Patent

active

RE0329959

ABSTRACT:
Apparatus for incremental cylinder length control in hydraulic seismic vibrators having increased frequency range. The vibrator apparatus (10) of the type having a reaction mass (38) and axial cylinder bore (42) utilizes hydraulically movable end sleeves (86 and 96) in each end of the cylinder bore (42) so that the end sleeves (86 and 96) can be controllably positioned thereby to alter the cylinder volume and adjust the hydraulic drive system (18) for maximum efficiency relative to operating frequency.

REFERENCES:
patent: 356538 (1887-01-01), Hubner
patent: 3159233 (1964-12-01), Clynch et al.
patent: 3168853 (1965-02-01), Prince
patent: 3369459 (1968-02-01), Fisher
patent: 3482646 (1969-12-01), Brown et al.
patent: 4106586 (1978-08-01), Stafford
patent: 4147228 (1979-04-01), Bouyoucous

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