Patent ID: 7815169

Claim:
A female-type quick coupling for fluid flow coupling to a male-type quick coupling, the female-type quick coupling comprising: an inlet fitting for connection to a pressurized fluid; a valve body arranged downstream of the inlet fitting and movable along an axial direction; a guide and conveying body having a parabolic cross section and arranged within the valve body; a plurality of ribs projecting radially outwardly from the guide and conveying body, the ribs being spaced apart along a circumferential direction; and a plurality of fluid flow channels between each circumferentially adjacent pair of the ribs, the fluid flow channels guiding the pressurized fluid that flows along the fluid flow channels as a substantially laminar flow along the axial direction to an annular chamber, the annular chamber being opened and closed by axial movement of the valve body to respectively permit and block the flow of the pressurized fluid to the male-type quick coupling.