Patent ID: 11953108
Assignee: SEMYUNGTECH CO., LTD.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC F

Claim 2:
3. The unloading valve assembly for compressed air processing system in a commercial vehicle of claim 2, wherein the piston head is provided with a pressurizing groove communicating with the second inlet, and an inner diameter of the pressurizing groove is smaller than an outer diameter of the piston head,
wherein the piston retracts in the axial direction as the second control input is applied to the pressurizing groove, and the entire end surface of the piston head is pressurized by the second control input, when the valve seat is pressurized to open the second opening of the hollow adapter, the compressed air introduced into the inner space of the valve seat through the first inlet is discharged to the main outlet.