Pressure valve

US10502338B2 · kind B2 · utility

Assignee

• DANFOSS POWER SOLUTIONS GMBH & CO. OHG · DE

Inventors

• Martin Wuestefeld · Waldkirch, DE
• Reinhardt Thoms · Büdelsdorf, DE

Key dates

• Filing date: Oct 4, 2017
• Grant date: Dec 10, 2019
• Expiry date: Jun 5, 2038

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K17/105
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

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 cylindrica…