Patent ID: 9394809
Filing Date: 2016-07-19
CPC Classification: F01L

Claim Text:
1. A hydraulic valve for a cam phaser, the hydraulic valve comprising: a valve housing with a longitudinal axis and a valve piston that is axially moveable along the longitudinal axis, wherein the valve piston opens and closes a first operating connection of the valve housing and a second operating connection of the valve housing, wherein the first operating connection and the second operating connection are axially offset from one another; and a supply connection of the valve housing which is used for supplying the hydraulic valve with a hydraulic fluid fed by a feed device, wherein the hydraulic valve is configured to be flowed through by the hydraulic fluid on different paths controlled by a flow permeable channel system of the valve piston, and wherein a check valve opening and closing an inflow channel is arranged in the hydraulic valve in the inflow channel of the valve housing which inflow channel is associated with the supply connection, wherein the check valve includes a disc shaped flow permeable first closure element with a first pass through opening and a spring element, wherein the check valve includes a flow permeable second closure element with a second pass through opening, wherein the first pass through opening is arranged opposite to a non flow permeable second outer section of the second closure element, wherein the second pass through opening is arranged opposite to a non flow permeable first inner section of the first closure element, so that a relative movement between the first closure element and the second closure element causes an opening or closing of the check valve, and wherein the spring presses the second closure element against the first closure element in a closed condition of the check valve.