Dana Corporation

The Weatherhead Company

Charles R Sarson

Richard C Acker

Frederick S Browne

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.

Quick connect fitting

A quick connect coupling is disclosed providing an integrally formed tube end assembly in which the wall of the tube is deformed to increase the diameter and is subsequently roll formed to produce a pair of axially spaced peripheral grooves to receive a snap lock ring and a seal. The inside diameter of the tube end within the grooves is substantially as large as the inside diameter of the remainder of the tube so that a substantial flow restriction does not result from the presence of the peripheral grooves. The material of the tube end is work hardened so that sufficient structural strength is provided even in the zone of the grooves. A smoothly curved rib is also formed in the tube wall to cooperate with a lock ring to permanently connect a tubular nut to the tube end after the device is initially connected as a quick connect coupling. The tubular nut is formed with a counterbore at its inner end to provide a radial wall and a cylindrical wall which receives the lock ring when the coupling is originally connected.

Quick connect tube coupling

A unitary tubular fitting body and cooperating mandrel for installation on a blind wall. The body includes an axially collapsible tube portion which during installation draws up the body into alignment with the wall. The body includes a frangible ring dimensioned to fail after adequate compression force is applied on the collapsing tube portion for full sealing engagement with the wall. Failure of the ring releases the mandrel and prevents overtightening of the fitting.

Growing community of inventors

Euclid, OH, United States of America

Charles R Sarson