Variable flow check valve device, suspension valve, vehicle suspension system and method

A variable flow check valve device comprising

• an inlet connected with a first pressure fluid reservoir,
• an outlet connected with a second pressure fluid reservoir, which is separate and/or separable from the first pressure fluid reservoir,
• a check valve closing member configured to open and to close the outlet in response to a pressure difference of the pressure fluid on opposite sides of the check valve closing member, and
• a spool valve with a movable spool disposed in a flow path of the pressure fluid extending from the inlet to the outlet, the spool valve forming a variable orifice within the flow path of the pressure fluid,
• wherein the variable flow check valve device further comprises a force balancing unit disposed in the flow path of the pressure fluid and configured to create a balancing force to at least partially counteract a pressure force acting on the spool when the pressure fluid passes an at least partially opened spool valve, and
• wherein the force balancing unit comprises a balancing tube element that is at least partially protruding into the flow path from a wall delimiting the flow path.