Vibration exciter machine

Details Vibration exciter machine Vibration exciter machine

1995-10-06

1998-06-23

Smith, Scott A.

Tool driving or impacting

Impacting devices

With means to reciprocate tool

173 49, 173117, 173217, 175 19, 405232, E21D 2000

Patent

active

057691738

ABSTRACT:
A vibration exciter machine has magneto striction elements (5,6) supported by a driven pile (2), for providing a vibration of up and down direction to the driven pile (2), and a drive circuit (D1) for controlling expansion and contraction movement of the magneto striction elements (5,6) by changing a supply time period of a current supplied to the magneto striction elements (5,6). By controlling of the drive circuit (D1) the supply time period of the current which flows in the magneto striction elements (5,6) is changed to control the expansion and contraction movement of the elements (5,7). Thereby a horizontal vibration component can be eliminated and only vertical vibration component can be transmitted to the driven pile material (2).

REFERENCES:
patent: 4033419 (1977-07-01), Pennington
patent: 5366026 (1994-11-01), Maruyama et al.

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