Seal with radial cut torus spring

A seal, comprising:

• a jacket having a base, an inner sealing leg, and an outer sealing leg;
• and
• a spring disposed within the jacket between and in contact with the inner sealing leg and the outer sealing leg, the spring comprising:
• a metallic annular body comprising an inner diameter and an outer diameter;
• and
• a plurality of radially cut perforations disposed about at least one of the inner diameter and the outer diameter of the metallic annular body,
• wherein the radially cut perforations comprise a radial width that is at least 1% and not greater than 75% of a radial width of the spring,
• wherein the radially cut perforations comprise a gap width that is less than the radial width of the spring not disposed with the plurality of radially cut perforations, and
• wherein at least one point along a circumference of the metallic annular body the spring has a closed shape as viewed in a cross-sectional plane.

An assembly, comprising:

• a shaft having an axis;
• a housing comprising a cavity and disposed annularly about the shaft;
• and
• a seal disposed within the cavity and configured to provide a radial seal between the shaft and the housing, the seal comprising:
• a jacket having a base, an inner sealing leg adjacent to and in contact with the shaft, and an outer sealing leg adjacent to and in contact with the housing;
• and
• a spring disposed within the jacket between and in contact with the inner sealing leg and the outer sealing leg, the spring comprising:
• a metallic annular body comprising an inner diameter and an outer diameter;
• and
• a plurality of radially cut perforations disposed about at least one of the inner diameter and the outer diameter of the metallic annular body, wherein a difference between the contact pressure of the seal at the metallic annular body of the spring and the contact pressure of the seal at the radially cut perforations is at least 4% and not greater than 95%.