Multi-stage centrifugal compressors
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 18, 2015
Grant Date -
Apr 12, 2012
app pub date -
Dec 23, 2009
filing date -
Jan 30, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to an improved multi-stage centrifugal compressor (10) comprising at least four centrifugal compression stages (11,12,13,14), each including an impeller. The impellers of one pair of the stages (12,13) are mounted on a first shaft (23) coupled to a first high speed direct drive motor (16), and the impellers of another pair of the stages (11,14) are mounted on a second shaft (24) coupled to a second high speed direct drive motor (15). The speed of the first and second motors is controlled by at least one drive (25) such that the impellers are all driven at the same speed.
First Claim
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International Classification(s)
- 2009 Application Filing Year
- F04B Class
- 723 Applications Filed
- 466 Patents Issued To-Date
- 64.46 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 5 Citation Count
- F04B Class
- 15.77 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 18, 2027 |
