Dual-Component Ring Seal for Gland of Hydraulic Piston

A ring seal defining a circumference and comprising:

• an inside surface defined about the circumference;
• an outside surface defined about the circumference;
• a base ring defined about the circumference, the base ring being composed of a first elastomeric material having a first hardness, the base ring defining a first inside section of the inside surface on the ring seal and defining a first outside section of the outside surface on the ring seal, the base ring having a first bottom surface and a first top surface, the first top surface defining a slot;
• a crown ring defined about the circumference, the crown ring being composed of a second elastomeric material having a second hardness, the second elastomeric material being different than the first elastomeric material, the crown ring defining a second inside section of the inside surface on the ring seal and defining a second outside section of the outside surface on the ring seal, the crown ring having a second bottom surface and a second top surface, the second bottom surface having a rib disposed in the slot of the first top surface, the second bottom surface attached to the first top surface,
• wherein the crown ring has:
• an inside flare extending inward in the circumference of the ring seal at a top inside corner at the second inside section;
• an outside flare extending outward from the circumference of the ring seal at a top outside corner at the second outside section;
• a recess defined in the second top surface between the inside flare and the outside flare;
• and
• an annex being raised in the recess.