The abutment surface of each of the transverse seals and the corresponding contact surface {TAIL ~ each} have an orientation and shape conforming at least approximately to a spherical surface having a center at the geometric center of the one bearing disposed on a side of {HEAD ~ the respective transverse seal} opposite the deflection control pressure chamber 
The abutment surface of each of the transverse seals and the corresponding contact surface { TAIL ~ each } have an orientation and shape conforming at least approximately to a spherical surface having a center at the geometric center of the one bearing disposed on a side of { HEAD ~ the respective transverse seal } opposite the deflection control pressure chamber
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