Liquid injected screw compressor, controller for the transition from an unloaded state to a loaded state of such a screw compressor and method applied therewith
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United States of America Patent
Stats
-
Jul 7, 2020
Grant Date -
Jul 28, 2016
app pub date -
Sep 10, 2014
filing date -
Sep 11, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Liquid injected screw compressor with an inlet valve and blow-off valve; a liquid circuit with injector; a controller for the transition from unloaded to loaded, whereby when unloaded the inlet valve is closed and the blow-off valve is open, and when loaded the inlet valve is open and the blow-off valve is closed, and whereby during an aforementioned transition, when the injection pressure is below a minimum threshold, the inlet valve remains closed and is opened with a certain delay and that there are means to gradually increase the injection during this delay and to open the inlet valve when the injection pressure has reached the minimum threshold.
First Claim
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Family
International Classification(s)
- 2014 Application Filing Year
- F04C Class
- 476 Applications Filed
- 419 Patents Issued To-Date
- 88.03 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F04C Class
- 0 % this patent is cited more than
- 5 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jan 7, 2028 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jan 7, 2032 |
