Controller for an unbalanced mass adjusting unit of a soil...

Details Controller for an unbalanced mass adjusting unit of a soil... Controller for an unbalanced mass adjusting unit of a soil...

2006-01-03

2006-01-03

Gerrity, Stephen F. (Department: 3721)

Tool driving or impacting

Drive by means reacting to rotating eccentric mass

C173S206000

Reexamination Certificate

active

06981558

ABSTRACT:
The invention relates to a controller for an unbalanced mass adjusting unit in a vibration exciter. Said controller comprises an adjusting piston for changing the relative position of unbalanced masses in the vibration exciter that is coupled to a reference piston. The position of a piston rod of the reference piston is detected by a pressure sensor and is furnished to a controller in the form of a position signal. The controller compares the position signal with an operating signal given by an operator and generates a control signal with which the position of a selector valve that controls the oil supply to or the oil discharge from the reference piston can be changed.

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patent: 0 655 532 (1994-11-01), None
patent: 0 960 659 (1999-12-01), None
patent: WO/9603224 (1996-02-01), None

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