Hydraulic vibrator with wide dynamic range

Details Hydraulic vibrator with wide dynamic range Hydraulic vibrator with wide dynamic range

1987-07-07

1988-11-15

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Vibrator-type transmitter

181119, 181121, H04R 2300

Patent

active

047854308

ABSTRACT:
Vibrator apparatus having adjustable cylinder volume by means of a continuously adjustable end sleeve that varies the axial limit of the cylinder. A reaction mass with an axial cylinder bore reciprocates on a double rod piston. Frist and second end sleeves define the cylinder volume and one end sleeve is threaded and axially translatable relative to the piston to vary volume while a position sensing device continually maintains centering of the piston in the cylinder.

REFERENCES:
patent: 3593335 (1971-07-01), Wires et al.
patent: 4106586 (1978-08-01), Stafford
patent: 4388981 (1983-06-01), Fair
patent: 4450928 (1984-05-01), Weber et al.
patent: 4641725 (1987-02-01), Cole et al.

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