Dynamic rotary face seal
US4759553A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Jan 27, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/3496
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A seal element is positioned within an outer casing and has an anchoring portion which is sealingly secured to the periphery of a rotating shaft by a surrounding coil spring. A radial portion on the seal element extends radially outward from the anchoring portion and passes between two spaced washers, providing a dynamic seal therebetween. An arm extends from one face of the seal element radial portion to resiliently bias the radial portion into engagement with the washers. A spiral hydrodynamic groove on the other face of the seal element radial portion automatically pumps fluid back to the fluid side of the seal apparatus as the shaft and seal element rotate together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.