said sleeve being adapted to rotate relative to said housing as said seal ring remains fixed against rotary motion relative to said {TAIL ~ housing}, said one axial side of said expander ring being in sealing relationship with respect to the other of said groove sealing wall surfaces, {HEAD ~ the engagement} of said conical outer ring surfaces with said inner side of said seal ring being at a location substantially at the radially inward extremity of the other of said axial sides of said seal ring 
said sleeve being adapted to rotate relative to said housing as said seal ring remains fixed against rotary motion relative to said { TAIL ~ housing } , said one axial side of said expander ring being in sealing relationship with respect to the other of said groove sealing wall surfaces , { HEAD ~ the engagement } of said conical outer ring surfaces with said inner side of said seal ring being at a location substantially at the radially inward extremity of the other of said axial sides of said seal ring
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL 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 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 OTH OTH OTH OTH OTH OTH