Amplitude changing apparatus

Details Amplitude changing apparatus Amplitude changing apparatus

1984-11-13

1987-02-24

Schran, Donald R.

Tool driving or impacting

Drive by means reacting to rotating eccentric mass

318284, B06B 116

Patent

active

046450149

ABSTRACT:
The invention is directed to an apparatus for resetting the vibration amplitude of a hydraulically driven vibration device having two eccentric weights arranged on a rotating shaft and rotatable relative to each other. The amplitude-resetting arrangement includes a hydraulic directional valve for resetting the vibration device between high and low amplitudes. The valve is electrically operated and the electric control circuit incorporates a time-delay relay for delaying the amplitude change until the speed of the rotating shaft has been reduced to an acceptable level.

REFERENCES:
patent: 3566228 (1971-02-01), Tsergas
patent: 4168774 (1979-09-01), Musschoot
patent: 4452016 (1984-06-01), Majors
IBM Technical Disclosure Bulletin, vol. 19, No. 5, Oct. 1976.

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