Oil-cooled screw compressor system and oil-cooled screw compressor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 14, 2017
Grant Date -
Sep 17, 2015
app pub date -
Sep 14, 2012
filing date -
Sep 14, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
In a housing 20 of an oil-cooled screw compressor 10, a separation gas supply path 59 through which separation gas is supplied to a separation gas supply gap 58 defined between a first seal unit and a second seal unit of a seal device 50, and a pressure balancing path 60 through which an area closer to a screw chamber 20a than the first seal unit in a discharge side seal chamber 20d communicates with a compression chamber at a pressure higher than an intake pressure and lower than a discharge pressure, are defined. A check valve 62 that restricts a flow of a fluid in a direction from the screw chamber 20a to the discharge side seal chamber 20d is disposed in the pressure balancing path 60.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2012 Application Filing Year
- F04C Class
- 318 Applications Filed
- 289 Patents Issued To-Date
- 90.89 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 6 Citation Count
- F04C Class
- 34.51 % this patent is cited more than
- 8 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 | Aug 14, 2028 |
