Abstract: A pack seal apparatus formed with a first rigid ring having a radial leg portion and an axial leg portion in an L-shaped cross section, a second rigid ring having a radial leg portion and an axial leg portion in an L-shaped cross section, the first and second rings being coaxially arranged to be rotatable with respect to each other, a first elastic annular seal member secured to the radial leg portion of the first ring so as to be sealingly and slidingly engaged with the axial leg portion of the second ring, a second elastic annular seal member secured to the radial leg portion of the second ring so as to be sealingly and slidingly engaged with the axial leg portion of the first ring; the axial and radial leg portions of the first ring, the axial and radial leg portions of the second ring, and the first and second elastic annular seal members cooperating to define a closed annular space, and a pulser ring made of a separate thin metal plate mounted on the radial leg portion of one of the first and second ring

Abstract: A bearing having a passive pulser ring which is provided axially adjacent to the frame substantially L-shaped in cross section, specifically the radially extending flange support section, and the cylindrical support section is provided between the outer and inner rings to provide precise parallelism and axial positioning.