Rotary cartridge seals with retainer
US6050572A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1998 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Mar 9, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3268
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A rotary cartridge seal is provided which includes a cold flowable plastic ring having a body for sealably engaging the housing bore and a lip for sealably engaging a shaft rotating within the housing bore. A separable metal retainer is provided for fixing the plastic ring within the housing bore and around the shaft with the separable metal retainer having a surface of revolution with a rear portion having a radius suitable for press fitting into the housing bore and a front portion of lesser diameter ending therein. An internal groove is provided into the plastic ring body for engaging the ring therein in order to latch the plastic ring and the metal retainer together with residual stress in both the axial and radial directions within the plastic ring due to groove and ring dimensions and shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.