Bladder device and method for displacing air in a bottle bore shaft
US4854945A · kind A · utility
2Cited by
9References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1988 |
| Grant date | Aug 8, 1989 |
| Priority date | — |
| Expiry date | Nov 17, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D19/0005
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A trapped air displacement device includes a flexible gas fillable bladder 30 and a device 34 for inserting the bladder 30 into a bottle bore 8 of a turbine or generator shaft 14. The flexible bladder 30 displaces the air trapped in the bottle bore region 8, so that it will escape along the slightly tilted surface of the shaft 14. A protective tube 34 is provided for the fragile bladder 30 during positioning. The bladder 30 can be inflated through an inner tube 32. The bladder 30 can also be inflated by sealing a small amount of gas in the bladder 30 and tube 30 and applying a vacuum to the shaft 14.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.