Patent ID: 8231146

Claim:
An electrolysis-resistant coupling assembly for connection with a line fitting of a fluid line, the coupling assembly comprising: a metal fitting having a first mating surface and having an aperture extending therethrough, wherein the fitting is configured to be aligned with and face the line fitting for coupling thereto; a metal coupler having one end provided with an outer coupler flange formed integral with the coupler, the outer coupler flange extending radially outward from the metal coupler, the fitting being loaded onto the coupler such that the outer coupler flange passes through the aperture; and a substantially non-compressible, electrically non-conductive rigid captive ring, the captive ring being separate and discrete from the fitting and the coupler, the captive ring being positioned against the outer coupler flange and interposed between the fitting and the coupler to provide electrical separation between the fitting and the coupler, wherein the fitting is held against the captive ring when the fitting is interconnected with the line fitting, wherein the captive ring includes a base extending axially with respect to the axis, the captive ring including a leg extending radially with respect to the axis, the captive ring including a retention barb extending radially outward from the base, the retention barb and the leg capturing the fitting therebetween to hold the fitting in position with respect to the coupler.