My improved seal assembly comprises {TAIL ~ a seal ring} of generally rectangular cross section in which the radially outward surface of the ring is in sealing engagement with a surrounding housing and wherein the radial dimension of the seal ring is less than {HEAD ~ the axial width} of the outward sealing surface 
My improved seal assembly comprises { TAIL ~ a seal ring } of generally rectangular cross section in which the radially outward surface of the ring is in sealing engagement with a surrounding housing and wherein the radial dimension of the seal ring is less than { HEAD ~ the axial width } of the outward sealing surface
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