Pressure limiting valve
AssigneeBosch Rexroth AG
InventorMichael Wilhelm
Life of this patent
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Abstract
What is disclosed is a a pressure limiting valve comprising a valve body, the axial movement of which is damped by means of a damping device. In accordance with the invention, the damping device includes a damping chamber formed on the return side, that is subjected to the system pressure acting on a pressure port.
Claims10
Pressure limiting valve, comprising a valve body biased into a closed position, whereby a connection between a pressure port and a return port may be controlled open, and to which a damping device which includes a damping piston defining a damping chamber is associated for damping the valve body movement, characterized in that the damping chamber is formed on the return side and connected with the pressure port;
- wherein the damping chamber is formed coaxial with a spring chamber accommodating a closing spring,
- wherein the damping piston extends in portions thereof through an axial bore of the valve body, that opens into the damping chamber on the one hand and into a pressure port-side end face of the valve body on the other side,
- wherein the valve body sealingly plunges into a damping sleeve through which the damping piston extends in portions thereof, and which forms an end-side termination of the damping chamber, and
- wherein the valve body includes a radially recessed, return-aside axial protrusion which plunges into the damping sleeve.
A pressure limiting valve, comprising a valve body biased into a closed position, whereby a connection between a pressure port and a return port may be controlled open, and to which a damping device which includes a damping piston defining a damping chamber is associated for damping the valve body movement, characterized in that the damping chamber is formed on the return side and connected with the pressure port,
- wherein the damping chamber is formed coaxial with a spring chamber accommodating a closing spring,
- wherein the damping piston extends in portions thereof through an axial bore of the valve body, that opens into the damping chamber on the one hand and into a pressure port-side end face of the valve body on the other side,
- wherein the valve body sealingly plunges into a damping sleeve through which the damping piston extends in portions thereof, and which forms an end-side termination of the damping chamber, and
- wherein the damping sleeve and/or the damping piston are supported on a set screw.
Dependencies are inferred from the claim text.