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US 10,502,338 B2Granted
Pressure valve
AssigneeDanfoss Power Solutions GmbH & Co. OHG
InventorsMartin Wuestefeld, Reinhardt Thoms
Life of this patent
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AssigneeDanfoss Power Solutions GmbH & Co. OHG
InventorsMartin Wuestefeld, Reinhardt Thoms
Estimating the term…
Pressure relief valve (1) comprising a valve housing (2), in which a double-side operable cylindrical pressure relief valve spool (3) is housed slidable along a longitudinal axis (4) of a cylindrical bore (5) in the valve housing (2). The pressure relief valve spool (3) can be shifted into a first position by a first force acting on an actuating side (6) of the pressure relief valve spool (3) and can be shifted into a second position by a pressure force acting on a sealing side (7) of the pressure relief valve spool (3). On the sealing side (7) of the pressure relief valve spool (3) a double-sealing, rotational symmetric poppet (30) is located having a rotational axis (34), a first convex sealing surface (31) and a second convex sealing surface (32). The first sealing surface (31) facing away from the pressure relief valve spool (3) is provided for sealing with an external valve seat (11). The second sealing surface (32) facing to the stepped bore (8) in the valve spool (3) is provided for sealing with the smaller diameter of the stepped bore (8). The poppet (30) and the rotational axis (34) of the poppet (30) are tiltable with respect to the longitudinal axis (4) of the cylindrical bore (5) in the pressure valve housing (2).
A pressure relief valve comprising a valve housing, in which a double-side operable cylindrical pressure relief valve spool is housed slidable along a longitudinal axis of a cylindrical bore in the valve housing, wherein the pressure relief valve spool can be shifted into a first position by a first force acting on an actuating side of the pressure relief valve spool and can be shifted into a second position by a pressure force acting on a sealing side of the pressure relief valve spool, wherein on the sealing side of the pressure relief valve spool a double-sealing, rotational symmetric poppet is located having a rotational axis, a first convex sealing surface and a second convex sealing surface, wherein the first sealing surface facing away from the pressure relief valve spool is provided for sealing with an external valve seat and the second sealing surface facing to a stepped bore in the valve spool is provided for sealing with the smaller diameter of the stepped bore, wherein the poppet and the rotational axis of the poppet are tiltable with respect to the longitudinal axis of the cylindrical bore in the pressure valve housing.
Dependencies are inferred from the claim text.