Seals for rotary processor
US4300842A · kind A · utility
15Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1980 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Jul 31, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/03
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Sealing means for controlling leakage of material between closely spaced apart, relatively moving coaxial annular surfaces. Essentially, leakage is controlled by providing a plurality of helical sealing channels on one of the relatively moving surfaces to resist flow of leakage liquid between the surfaces. The sealing means are particularly adaptable for controlling leakage from processing passages of rotary processing apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.