Sweep frequency vibrator

Details Sweep frequency vibrator Sweep frequency vibrator

G - Physics

01

V

G01V 1/133 (2006.01) G01V 1/155 (2006.01)

Patent

CA 2116302

ABSTRACT OF THE DISCLOSURE A sweep frequency vibrator is set forth. It has an elongate cylindrical housing closed at the top and bottom ends. On the interior, there is a reactionary mass fixed to identical upper and lower piston ends. They are received in seal isolated chambers, one being formed in a moveable plug. The plug is moved to thereby vary the spacing of the chambers. As the frequency is changed, plug is moved to assure sufficient clearance from the excursion of the reactionary mass. Hydraulic oil under pressure is delivered to control valves, one for each piston end. The two control valves and piston ends have very short flow lines. Moreover the excursion permitted for the pludg assures operation without bottoming out.

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