A check valve having a reverse-direction fluid supply function capable of supplying a fluid in a reverse direction by opening a fluid passage formed in a central shaft of a disk configured to open or close a flow path. The valve includes a valve main body into which a fluid is introduced, a shaft installed in the valve main body and configured to move forward toward an inside of the valve main body or backward toward an outside of the valve main body, a disk disposed in the valve main body and configured to open or close the valve main body, and a spring interposed between the disk and an inner surface of the valve main body. The disk opens the valve main body due to fluid pressure and blocks the same when fluid pressure is removed by movement of the shaft or by an elastic reaction force of the spring.

A tire inflation system for a vehicle having a control unit including an internal fluid conduit. At least one extended stroke valve including a housing in fluid communication with the internal fluid conduit and a wheel assembly. The extended stroke valve includes a hollow outer shaft having a first flange. A first biasing member is disposed about the hollow outer shaft between the first flange and an annular protrusion defined by the housing. The extended stroke valve also includes an inner shaft having a second flange, wherein the inner shaft is at least partially disposed in the hollow outer shaft. A second biasing member is disposed about the inner shaft between the second flange and a surface defined by the hollow outer shaft. In addition, a sealing member is coupled with an end of the inner shaft opposite the second flange.

A check valve having a reverse-direction fluid supply function capable of supplying a fluid in a reverse direction by opening a fluid passage formed in a central shaft of a disk configured to open or close a flow path. The valve includes a valve main body into which a fluid is introduced, a shaft installed in the valve main body and configured to move forward toward an inside of the valve main body or backward toward an outside of the valve main body, a disk disposed in the valve main body and configured to open or close the valve main body, and a spring interposed between the disk and an inner surface of the valve main body. The disk opens the valve main body due to fluid pressure and blocks the same when fluid pressure is removed by movement of the shaft or by an elastic reaction force of the spring.

A valve assembly includes a housing with a bore, a supply port in fluid communication with the bore, a control port in fluid communication with the bore, and a vent port in fluid communication with bore such that the vent port is located at a location of the housing that is between the supply port and the control port. A valve seat assembly with a valve seat body is disposed within the housing and defines a control chamber in constant fluid communication with the control port, a vent path from the control port to the vent port, and a supply passage which provides constant fluid communication from the supply port to the control chamber. A vent valve member is selectively seated and unseated with the vent valve seat to selectively prevent and permit fluid communication from the control port to the vent port respectively.

A valve assembly includes a housing with a bore, a supply port in fluid communication with the bore, a control port in fluid communication with the bore, and a vent port in fluid communication with bore such that the vent port is located at a location of the housing that is between the supply port and the control port. A valve seat assembly with a valve seat body is disposed within the housing and defines a control chamber in constant fluid communication with the control port, a vent path from the control port to the vent port, and a supply passage which provides constant fluid communication from the supply port to the control chamber. A vent valve member is selectively seated and unseated with the vent valve seat to selectively prevent and permit fluid communication from the control port to the vent port respectively.

A tire inflation system for a vehicle having a control unit including an internal fluid conduit. At least one extended stroke valve including a housing in fluid communication with the internal fluid conduit and a wheel assembly. The extended stroke valve includes a hollow outer shaft having a first flange. A first biasing member is disposed about the hollow outer shaft between the first flange and an annular protrusion defined by the housing. The extended stroke valve also includes an inner shaft having a second flange, wherein the inner shaft is at least partially disposed in the hollow outer shaft. A second biasing member is disposed about the inner shaft between the second flange and a surface defined by the hollow outer shaft. In addition, a sealing member is coupled with an end of the inner shaft opposite the second flange.