Patent ID: 7686349
Filing Date: 2010-03-30
Classification: F16L,Y10S

Abstract:
1. A tube coupling comprising: a coupling body having a main portion; a cylindrical projection rigidly fixed to the main portion of the coupling body, the cylindrical projection being configured to engage an inner surface of a tube to be secured to the coupling body; and a grab ring mounted on the coupling body, at least a portion of the grab ring encircling the cylindrical projection with a clearance gap being formed between the grab ring and the cylindrical projection, the grab ring comprising a circular sleeve coupled to the coupling body and extending axially from the coupling body, one or more legs extending axially from the sleeve of the grab ring to the main portion of the coupling body, and a plurality of grab elements that project radially inwardly from the circular sleeve toward the cylindrical projection to engage an outer surface of the tube when the tube is located on the cylindrical projection to grip and resist withdrawal of the tube from the cylindrical projection.