Quick connect fitting

摘要

A quick connect coupling is disclosed which includes a body assembly providing a tube end receiving passage having an inner cylindrical seal portion and an internal, annular groove outwardly of the seal portion. A tube end portion is proportioned to fit into the tube receiving passage with a close fit and has a peripheral seal groove located within the seal portion and a peripheral lock ring groove within the internal groove when the end portion is inserted into the passage. A resilient seal is carried in the seal groove and a compressible lock ring having a circular cross section is located in the lock ring groove. The lock ring groove has a sidewall which is adapted to engage the clip and apply outwardly directed radial pressure and axially directed longitudinal pressure to the lock ring to urge the lock ring into longitudinal contact with a wall of the internal groove and to urge the lock ring away from the bottom of the lock ring groove upon the application of an axially outwardly directed pulling force on the tube.