Valve
AssigneeConstruction Tools GmbH
InventorColin Dirr
Life of this patent
Estimating the term…
Abstract
The present invention relates to a valve for a hydraulically operated percussion mechanism having a main valve (2, 102) which is in the form of a rotary slide valve having a rotary slide. In order to reduce the installation space and the production costs of such valves, it is proposed according to the invention that the rotary slide is configured as a receiving housing which receives a valve element in the form of a secondary valve (68, 114). Furthermore, the invention relates to the use of a valve which is arranged on a percussion mechanism of a hydraulic hammer.
Claims9
In combination with a hydraulic impact mechanism having an impact piston movable through a stroke, a valve assembly comprising:
- a main rotary slide valve with a rotary slide and having a first switching function that modifies the stroke of the impact piston and a second switching function that determines whether the impact mechanism executes further impact strokes after the occurrence of at least one no-load stroke;
- a secondary valve having a pilot-valve element held in the rotary slide;
- a control slide valve having a pair of opposite faces;
- and
- respective hydraulic lines between the secondary valve in the rotary slide of the main rotary slide valve and the faces of the control slide valve for reversing the control slide valve by the secondary pilot valve.
Dependencies are inferred from the claim text.