Unidirectional labyrinth seal system
US10215282B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Jun 19, 2017 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Jun 19, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C33/761
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A unidirectional annular labyrinth seal for a roller having an outer labyrinth seal and an inner labyrinth seal. The inner and outer seals have an annular outer wall, and an annular inner wall defining an interior and an interior surface. The interior of each seal has one or more annular middle walls and each has a central opening. The outer labyrinth seal and the inner labyrinth seal engage each other so that the outer walls, the inner walls, and the one or more middle walls cooperate to form a labyrinth in the unidirectional annular labyrinth seal. An annular interior seal is positioned in the interior of the outer labyrinth seal or in the interior of the inner labyrinth seal. The unidirectional annular labyrinth seal allows air to flow out of the roller but not into the roller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.