Screw rotor and fluid machine body
Number of patents in Portfolio can not be more than 2000
United States of America
Stats
-
Jan 18, 2022
Grant Date -
Jan 28, 2021
app pub date -
Mar 14, 2019
filing date -
Mar 14, 2019
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention reduces a pressure or thermal effect while reducing the mass of a screw rotor. There is provided a screw rotor having a helical tooth on an outer periphery, the helical tooth extending by a predetermined length in an axial direction, in which a radial cross section of the screw rotor includes a lobe portion having a predetermined thickness in a direction toward an axis and forming the helical tooth, and a hollow portion extending from an axial side inner surface of the lobe portion toward an axial side, and the predetermined thickness of the lobe portion differs between a high load side on the outer periphery of the screw rotor and a low load side on the outer periphery.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2019 Application Filing Year
- F04C Class
- 445 Applications Filed
- 303 Patents Issued To-Date
- 68.09 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F04C Class
- 0 % this patent is cited more than
- 3 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Jul 18, 2025 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 18, 2029 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 18, 2033 |