Sealing ring

A sealing ring for providing a sealing connection between a fluid power line and a fluid power joint element, the sealing ring being arranged between a cylindrical sealing surface of a female socket part in the joint element and an outer surface of the fluid power line introduced into the female socket part from an insertion end thereof, comprising first and second integral overpressure sealing lips which have a V-like configuration on a first axially facing side thereof which is remote from the insertion end, the first overpressure sealing lip being radially outwardly of the second overpressure sealing lip and sealingly engaging with the sealing surface and the second radially inner overpressure sealing lip operatively sealingly engaging the outer surface of the fluid power line, a thrust portion provided on a second axially facing side opposite the first side, wherein the thrust portion is defined by an annular, axially extending projection which is of a reduced radially outermost dimension in relation to an axially adjoining section of the sealing ring so that in an operational position between the thrust portion and a radially inwardly facing and opposing sealing surface of the female socket there is an annular gap, and wherein a circumferentially extending inner underpressure sealing portion is provided on an inner surface of the thrust portion, and wherein the underpressure sealing portion together with the thrust portion define an integral pivot ring connected with the axially adjoining section of the sealing ring by means of a circumferentially extending flexible zone so that the inner underpressure sealing portion of the sealing ring in an operative position thereof is able to be pressed automatically radially inwardly against the outer surface of the fluid power line when the fluid power line is at a lower pressure than the surroundings.