Patent ID: 6374857
Filing Date: 2002-04-23
Classification: B60T,F15B,G05D,Y10T

Abstract:
A valve assembly for controlling a differential pressure, comprising:a valve housing, an actuating device disposed within the valve housing, an actuating element movable into engagement with the actuating device, a first resiliently biased sleeve slidable in the valve housing and including a first sealing seat, a second resiliently biased sleeve slidable in the valve housing and including a second sealing seat, the second sealing seat arranged axially opposite the first sealing seat, and a valve member stationarily arranged in the valve housing between the first and second sealing seats, the first sealing seat interacting with the valve member to control a first connection between a first port and a second port, the second sealing seat interacting with the valve member to control a second connection between the second port and a third port, wherein one of the first and second sealing seats engages the actuating element and is separated from the valve member when the valve assembly is in an inactive position, and wherein the other one of the first and second sealing seats engages the actuating element and is separated from the valve member when the valve assembly is in an active position, wherein the actuating element is of a bowl-shaped configuration including a first outward area and a second outward area, and wherein the first sleeve includes a first collar opposite the first sealing seat and a second collar opposite the second sealing seat.