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A water pump face seal assembly uses a wave spring stamped from flat stock with drive tabs which, besides providing contact force and wear take up, also serves to maintain a square, concentric contact interface and to transfer torque with almost no lost motion, isolating a joint between an elastomer

A water pump face seal assembly uses a wave spring stamped from flat stock with drive tabs which, besides providing contact force and wear take up, also serves to maintain a square, concentric contact interface and to transfer torque with almost no lost motion, isolating a joint between an elastomer seal and a seal casing from twisting stress.

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A face seal assembly for sealing a generally annular space formed between a primary seal face fixed to a fluid filled housing and the outer surface of a rotatable cylindrical shaft that extends through a central opening in said primary seal face, comprising, a first casing having a cylindrical sleev

A face seal assembly for sealing a generally annular space formed between a primary seal face fixed to a fluid filled housing and the outer surface of a rotatable cylindrical shaft that extends through a central opening in said primary seal face, comprising, a first casing having a cylindrical sleeve sized to fit non-turnably and fluid tight to said shaft outer surface and also having a wall extending radially out from said sleeve via a connecting structure thereto and being generally normal to the axis of said sleeve and terminating in a cylindrical flange extending from said wall in one axial direction, said cylindrical flange further having a plurality of slots therethrough, a second casing surrounding said first casing sleeve having a generally cylindrical skirt and a wall extending radially inwardly from said skirt generally normal to the axis of said skirt and terminating in a cylindrical flange of lesser diameter than said first casing cylindrical flange and extending in the opposite axial direction, said cylindrical flange also having a plurality of slots therethrough, an axially resilient, generally annular wave spring that is formed of flat stock with a width substantially equal to half the difference in diameters between said casing cylindrical flanges, and which therefore will fit closely between said cylindrical flanges when it is compressed between said casing walls to bias them apart, said wave spring further being torsionally stiff by virtue of its width and also having a plurality of inner and outer tabs receivable through said first and second casing slots so as to mechanically interlock said casing cylindrical flanges to efficiently transmit torque from said first to said second casing with substantially no lost motion, and, an elastomer sealing member having a radially inner portion joined fluid tight to said first casing and a radially outer portion that is non turnably held inside said second casing and which holds a secondary seal face resiliently against said primary seal face under the bias of said wave spring, whereby, said annular space is completely sealed relative to said fluid filled housing, and the sealing juncture of said elastomer sealing member and said first casing is substantially isolated from stress by virtue of the efficient transmission of torque by said wave spring and by virtue of the close fit of said wave spring between said casing flanges, which maintains said casings substantially coaxial to one another. A cartridge face seal assembly for sealing a generally annular space formed between a primary seal face fixed to a fluid filled housing and the outer surface of a rotatable cylindrical shaft that extends through a central opening in said primary seal face, comprising, a first casing having a cylindrical sleeve that is adapted to be installed fluid tight and non-turnably to said shaft outer surface and also having an integral wall extending radially out from said sleeve via a connecting structure and being generally normal to the axis of said sleeve, said connecting structure comprising a fold of generally U shaped cross section deformed so as to be spaced radially outwardly from the shaft, said integral wall further being substantially axially aligned with said fold so as to be capable of providing stiffening for said fold, a second casing surrounding said first casing sleeve having a generally cylindrical skirt and a wall extending radially inwardly from said skirt generally normal to the axis of said skirt, an axially resilient wave spring that is torsionally stiff and which is compressed between said first and second casing walls so as to bias them axially apart, said wave spring further being mechanically interlocked between said first and second walls so as to efficiently transmit torque from said first to said second casing with substantially no lost motion by virtue of said spring\s torsional stiffness, and, an elastomer sealing member having a radially inner sleeve portion that is crimped tightly into said first casing fold as it is deformed radially outwardly so as to provide a fluid tight juncture and so as to retain said seal to said first casing, said seal also having a radially outer portion that is non-turnably held inside said second casing skirt and wall and which holds a secondary seal face, whereby, prior to installation of said first casing, said second casing is retained to said first casing by said seal sleeve portion, while after installation, the fluid tight juncture of said seal sleeve portion and said first casing is substantially isolated from stress by virtue of the efficient transmission of torque by said wave spring.