Control valve and a method for a percussion device with a...

Details Control valve and a method for a percussion device with a... Control valve and a method for a percussion device with a...

2007-02-20

2007-02-20

Kershteyn, Igor (Department: 3745)

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

Selective cyclic and noncyclic operation or parking

C091S218000, C091S235000, C091S321000

Reexamination Certificate

active

10546245

ABSTRACT:
The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. A percussion device (1) for breaking rock includes an impact element (8) controlled by a control valve (2). The control valve includes a control element (5) arranged to control channels (7b) leading to a working pressure surface (9) of the impact element (8). The control element, during a working cycle of the control valve, is arranged to open and close pressure channels at several connecting moments so that during one working cycle of the valve, several impact pulses are arranged to be produced.

REFERENCES:
patent: 3596562 (1971-08-01), Foster et al.
patent: 4020747 (1977-05-01), Reynolds

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