Broad-band hydraulic vibrator

Details Broad-band hydraulic vibrator Broad-band hydraulic vibrator

1987-06-25

1988-11-15

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Vibrator-type transmitter

367190, 181121, 92 1351, H04R 2300

Patent

active

047854316

ABSTRACT:
A hydraulic vibrator having an adjustable piston rod and a fixed piston rod to vary the cylinder volume for operation at different vibration frequencies. The adjustable piston rod is in threaded engagement with the fixed piston rod and has a piston head adjacent a piston head on the fixed piston rod. Rotation of the adjustable piston rod displaces the two piston heads, thereby varying the cylinder volume of the hydraulic vibrator.

REFERENCES:
patent: 108426 (1870-10-01), Young
patent: 1325006 (1919-12-01), Dearsley
patent: 3815480 (1974-06-01), Spyra
patent: 4106586 (1978-08-01), Stafford
patent: 4388981 (1983-06-01), Fair
patent: 4450298 (1984-05-01), Weber et al.
patent: 4641725 (1987-02-01), Cole et al.

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