Anti-leakage device
US5893565A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1996 |
| Grant date | Apr 13, 1999 |
| Priority date | — |
| Expiry date | Dec 13, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/406
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a machine in which a rotating shaft extends into a housing through a gland, the shaft being rotated in only one direction, the housing containing lubricant, the gland including an opening of substantial length with an annular radially inwardly extending flange at an axially inner end, an anti-leakage device comprises a sleeve mounted on and around the shaft closely but to permit rotation of the shaft, and mounted against rotation in the gland opening. The sleeve has an annular seat, in which an O-ring is mounted, and a helical groove in a surface contiguous the shaft, the groove being formed in a direction with respect to the direction of rotation of the shaft to move fluid in a direction toward the housing. The clearances between the shaft and housing when the shaft is not rotating are such as to prevent the lubricant in the housing from leaking out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.