Device for a hydraulically driven percussion hammer

Details Device for a hydraulically driven percussion hammer Device for a hydraulically driven percussion hammer

1976-08-30

1978-08-01

Maslousky, Paul E.

Motors: expansible chamber type

Differential

Motive fluid constantly applied to one working member face

91 39, 91470, 92134, F15B 1517, F15B 2102

Patent

active

041035917

ABSTRACT:
Device for a hydraulically driven percussion hammer for activating a tool, comprising a differential piston with corresponding cylinder, where the piston's largest surface is closest to the percussion tool, and where the smallest working surface is in direct hydraulic connection with an air tank. The largest working surface is above a multiple valve in connection with a hydraulic pressure medium. The valve is adjustable from an admission position with closed return duct to a position where the admission is blocked and the return duct is open. The piston chamber above the piston's small working surface has a feed duct with back pressure valve for a hydraulic pressure medium.

REFERENCES:
patent: 2408338 (1946-09-01), Parsons
patent: 3587394 (1971-06-01), Hilbrands
patent: 3766830 (1973-10-01), Montabert
patent: 3774502 (1973-11-01), Arndt

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