Slide valve, percussion device and method
AssigneeConstruction Tools PC AB
InventorAnders Lundgren
Life of this patent
Estimating the term…
Abstract
A slide valve for a hydraulic percussion device. The slide valve includes a transition surface that is arranged to alternately be subjected to a working pressure and a tank pressure to carry out a reciprocating movement when the percussion device is in use. The slide valve includes at least one channel that is open at one end of the slide valve, and at least one displaceable pin that is arranged inside the at least one channel.
Claims15
Slide valve for a hydraulic percussion device, which slide valve comprises a transition surface that is arranged to alternately be subjected to a working pressure and a tank pressure to carry out a reciprocating movement when the percussion device is in use, wherein said slide valve is an annular member and comprises at least one channel which is open at one end of said slide valve, and at least one pin that is displaceable relative to said slide valve and that is at least partly arranged inside said at least one channel, whereby said at least one pin is arranged to be subjected to a working pressure that presses on one end surface of said at least one pin, the working pressure being introduced in said at least one channel between said end surface and a pressure surface opposite said end surface, whereby the other end surface of said at least one pin is pressed against a non-movable component of said hydraulic percussion device, which results in that said slide valve is pressed in the opposite direction to a direction in which said at least one pin is pressed.
Method for making a slide valve of a percussion device to carry out a reciprocating movement when said percussion device is in use, which method comprises the step of alternately subjecting a transition surface of said slide valve to a working pressure and a tank pressure, wherein said slide valve is an annular member and is provided with at least one channel that is open at one end of said slide valve, and at least one pin that is displaceable relative to said slide valve and that is arranged at least partly inside said at least one channel, whereby said method comprises the step of subjecting said at least one pin to a working pressure that presses on one end surface of said at least one pin, said working pressure being introduced in said at least one channel between said end surface and a pressure surface opposite said end surface, whereby the other end surface of said at least one pin is pressed against a non-movable component of said hydraulic percussion device, which results in that said slide valve is pressed in the opposite direction to a direction in which said at least one pin is pressed.
Dependencies are inferred from the claim text.