Shaft seal with controlled porosity elements
US5480161A · kind A · utility
33Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1993 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | Jun 15, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/918
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A labyrinth type seal assembly having one or more controlled porosity elements retained in the labyrinth pathway between relatively rotatable seal elements. Preferably the controlled porosity elements are formed of open celled foam material such as polyurethane. The controlled porosity elements assist in preventing the ingress of contaminating solid or liquid materials, the loss of sealed materials and the flooding or overloading of drain ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.