Screw rotor, fluid machine main body, and fluid machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 16, 2022
Grant Date -
Jan 21, 2021
app pub date -
Mar 14, 2019
filing date -
Mar 30, 2018
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention prevents a decrease in strength of a screw rotor including a hollow portion and improves cooling performance. 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 cross section of a tooth portion, a cross section of an axial portion, a cross section of a support portion connected to an axial side of a tooth bottom or a tooth tip in the cross section of the tooth portion and an outer diameter side of the axial portion, and a cross section of a hollow portion formed by the support portions adjacent to each other in a rotational direction and an axial side inner surface of the tooth bottom or the tooth tip, and an axial longitudinal cross section of the screw rotor is a cross section in which the axial portion, the support portion, the axial side of the tooth bottom or the tooth tip, and an axial end portion of the screw rotor are continuously connected to each other as an integral structure by a three-dimensional fabrication method or the like.
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 | Feb 16, 2026 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Feb 16, 2030 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Feb 16, 2034 |
