Patent ID: 9529369
Filing Date: 2016-12-27
CPC Classification: F16K,F17C,Y02E,Y10T

Claim Text:
1. A shut-off valve for a pressure accumulator vessel, comprising: a valve housing having a valve chamber with an inlet region, a relief region having a relief opening, an accumulator region, an intake opening and an outlet opening facing the pressure accumulator vessel; a piston having at least one axial connecting channel, a first effective piston surface facing an inlet region of the valve chamber and a second effective piston surface adjacent to the accumulator region, the piston being configured to axially move in the valve chamber during a change in pressure in the accumulator region; a sealing body; sealing elements configured to guide the piston during axial movement of the piston in the valve chamber, and between which the relief region is arranged; a pressure control valve arranged between the outlet opening and the relief region; a bias mechanism; and a passage opening arranged between the intake opening and the outlet opening, the passage opening configured to reversibly open and close during the change in pressure in the accumulator region, and, in an unpressurized state, is kept open by the bias mechanism, wherein one of the first effective piston surface and the valve housing form a valve seat.