Patent ID: 9568127
Date: 2017-02-14
CPC Classifications: F16L

Claim:
1. A coupling assembly comprising a pipe, a fitting, and a connecting device mechanically joining the pipe and the fitting without an adhesive or bonding agent, wherein: the fitting comprises an end portion having an end opening defined by an interior annular surface, the pipe comprises an end having an outer annular surface received within the end opening of the fitting, the connecting device consists essentially of a seal ring, a locking ring and a spacer disk, the seal ring disposed within the end portion of the fitting in sealing contact with the interior annular surface thereof and with the outer annular surface of the pipe end, the locking ring disposed within the end portion of the fitting adjacent the seal ring substantially without an associated element supporting or stabilizing the locking ring, the locking ring including a plurality of corrugations extending circumferentially thereabout, the corrugations presenting inner edge portions engaging the outer annular surface of the pipe end and outer edge portions engaging the interior annular surface of the end portion of the fitting for opposing withdrawal of the pipe end axially outwardly from the fitting, and the spacer disk disposed within the end portion of the fitting between the seal ring and the locking ring.