Labyrinth seal assembly
US6367807B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1998 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Oct 19, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/4478
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A labyrinth seal for use in a centrifugal pump. The seal may eliminate rotating surfaces from rubbing directly against groove surfaces during installation thereby eliminating or reducing the scraping of material from rotating surfaces. Therefore, generation of fine powder from such scraping is reduced or substantially eliminated. A stationary covering is provided over the outer surface or periphery of a rotating member in order to make maintenance personnel less susceptible to injury. No heat process is required for assembly (although some may be used in certain embodiments). A radial trap system is provided for enhancing performance of the seal, including a recess or cutout in the face of a stationary member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.