Patent ID: 7618211
Filing Date: 2009-11-17
Classification: E21B,F16B,Y10T

Abstract:
1. 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 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.