Tool driving or impacting – Impacting devices – With means for rotating tool
Patent
1995-06-02
1997-09-16
Smith, Scott A.
Tool driving or impacting
Impacting devices
With means for rotating tool
173206, B25D 922
Patent
active
056670222
ABSTRACT:
An impact device 1 that is continuously controllable in terms of impact rate and impact force contains a percussion piston 25 that can move back and forth in the inner boring of the cylinder 3, and that is controlled via a rotary valve 15 having as rotary engine 16. The rotary valve 15 and the rotary engine 16 are positioned separately from the percussion piston 25, either on or in the cylinder 3, and are linked only via portings 20, 22, 24 to the pump connection 21 and the tank connection 23, or to the double-sided piston areas A1, A2, so that the valve can be used with practically any type of impact device, without requiring substantial alteration of its structural dimensions. In addition, an advantageous continuous control of impact rate and impact force with a constant power output is ensured.
REFERENCES:
patent: 3995703 (1976-12-01), Wanner
patent: 4211291 (1980-07-01), Kellner
patent: 4460051 (1984-07-01), Widmer
patent: 4694912 (1987-09-01), Glaser
patent: 5010963 (1991-04-01), Neroznikov et al.
patent: 5056606 (1991-10-01), Barthomeuf
patent: 5415240 (1995-05-01), Mundjar
Creighton Wray James
Deilman-Haniel GmbH
Smith Scott A.
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