Patent ID: 7618211

Claim:
A manual locking assembly for a quick connect coupling, the manual locking assembly comprising: a cylindrical male pin having at least one guiding and retaining lug extending from an outer radius of the cylindrical male pin and a cylindrical front piece having a groove; a cylindrical sleeve-shaped female part having a hole with an associated guide groove, and locking grooves, the locking grooves being formed within the cylindrical sleeve-shaped female part; a rotatable key bolt axially arranged and central within the cylindrical sleeve-shaped female part, the rotatable key bolt comprising a quadrilateral locking block, a cylindrical guiding flange, and a cylindrical locking bolt having millings on opposing sides of the cylindrical locking bolt; a locking bolt retainer comprising: a cylindrical body including a transversal hole having a radius that corresponds to an outer radius of the cylindrical locking bolt and a groove extending from the transversal hole that corresponds to the millings on the cylindrical locking bolt; a lower flange on a first side of the cylindrical body; and an upper flange located on a second side of the cylindrical body opposite the first side, the upper flange having an inclined surface on an upper side of the upper flange; and a spring located below the locking bolt retainer, the spring being preloaded to lock, wherein the inclined surface of the upper flange is accessible through the hole in the cylindrical sleeve-shaped female part to unlock the manual locking assembly, the guiding and retaining lug is brought into abutment with the locking grooves during rotation, and the quadrilateral locking block extends into the groove in the cylindrical front piece during engagement.