Reduced leakage balance piston seal
US9279324B2 · kind B2 · utility
1Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2012 |
| Grant date | Mar 8, 2016 |
| Priority date | — |
| Expiry date | Nov 18, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/2266
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Balance piston assembly, apparatus, and methods are provided. The assembly includes a balance piston coupled to a rotatable shaft and configured to rotate therewith, the balance piston including a first shelf and a second shelf, the first and second shelves being axially-overlapping and radially-offset. The assembly also includes a seal including a first sealing surface configured to seal with the first shelf and a second sealing surface configured to seal with the second shelf.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.