Patent ID: 6161838
Filing Date: 2000-12-19
Classification: F16J

Abstract:
A rotary cartridge seal stack assembly comprising:a plurality of rotary cartridge seals disposal in an abutting relationship between a housing bore and a shaft, each rotary cartridge real comprising:a cold flowable plastic ring having body means for sealably engaging a housing bore and lip means for sealably engaging a shaft rotating within said housing bore;separable metal retainer means for fixing said plastic ring and spring within said housing bore and around said shaft, said separable metal retainer means having a surface of revolution with a rear portion having a radius suitable for press fitting into said housing bore; andmeans defining an internal groove in said body means for engaging the ring therein in order to latch the plastic ring and metal retainer means together with residual stress in both axial and radial directions within the plastic ring due to the groove and ring dimensions and shape;said internal groove having a diameter greater than the ring and wherein a width of said internal groove is smaller than a width of the ring in order to maintain axial stress in the plastic ring.