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