Abstract: The present invention involves a seal ring for sealing an annular space between two components. The seal ring includes an annular jacket, a spring, and a cap. The jacket includes an annular cavity defined by two annular lips. The spring is disposed within the annular cavity of the jacket. The cap is disposed over the annular lips, and encapsulates the annular cavity. The spring biases the lips against the cap to thereby seal the annular cavity. Either the cap or the jacket includes a pair of annular channels, and the other includes a pair of annular projections, so that the projections and channels interfit to thereby lock together the cap and jacket. The cap and jacket are made from a polymer material, although not necessarily the same polymer material. The spring may be cantilevered, helical ribbon coil, slanted coil, or silicone filled with one or more spring elements. The lips of the jacket may have flanges to trap the spring in the annular cavity.

Abstract: A coil spring including a plurality of coils connected to one another in series. Each of the coils has a front portion and a rear portion. The front portion of at least one of the coils includes a first section disposed at a first predetermined angle relative to a plane perpendicular to the spring centerline and a second section disposed at a second predetermined angle relative to the spring centerline. The coil spring is suitable for use in a variety of applications including, but not limited to, seals.