Cartridge seal for a centrifugal pump
US9599229B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Oct 21, 2014 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Sep 10, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J15/348
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A cartridge seal for centrifugal pump comprises a shaft tube assembly attached to a structure. A shaft tube of the shaft tube assembly receives a shaft of the centrifugal pump. A shaft collar of the cartridge seal attached to a second end of the shaft tube is in communication with a second end of the structure. A chamber tube of the shaft tube assembly and the shaft tube collectively define a chamber that contains compressed gas. A spring is located in the chamber of compressed gas. The compressed gas and the spring cause the shaft tube assembly to substantially prevent movement of fluids between the shaft and the structure in the centrifugal pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.