Variable dual spring blade root support for gas turbines
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Mar 6, 2018
Issued Date -
N/A
app pub date -
Apr 29, 2015
filing date -
Oct 18, 2013
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Non-US Coverage
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Forward Citations
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Abstract
An adjustable blade root spring device for turbine blade fixation in turbomachinery. The device is designed to be placed in a space in a rotor disk cavity adjacent to a tip of a blade root, where the device applies a radial outward force on the turbine blade to fix the blade position in the rotor disk. The device includes a wave spring with integral end blocks which is compressed by a bolt and a coil spring. When the wave spring is compressed in length, it increases in height and makes contact with the rotor disk and the turbine blade. The force of the wave spring on the turbine blade can be adjusted via the bolt, and the coil spring provides an increased compliance range. The body of the device has an oblong cross-sectional shape, thereby preventing rotation of the device in the space between the blade and the disk.
First Claim
all claims..Other Claims data not available
Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
SIEMENS ENERGY INC | 4400 ALAFAYA TRAIL ORLANDO FL 32826 |
International Classification(s)

- 2015 Application Filing Year
- F01D Class
- 2939 Applications Filed
- 2348 Patents Issued To-Date
- 79.90 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Gupta, Mohit | Kissimmee, US | 179 | 1632 |
# of filed Patents : 179 Total Citations : 1632 | |||
Holden, Erica | Boca Raton, US | 1 | 10 |
# of filed Patents : 1 Total Citations : 10 | |||
Hudson, Robert | Jupiter, US | 21 | 97 |
# of filed Patents : 21 Total Citations : 97 | |||
Myers, David | Palm Beach Gardens, US | 60 | 1185 |
# of filed Patents : 60 Total Citations : 1185 | |||
Polyzopoulos, Charalambos | Orlando, US | 20 | 58 |
# of filed Patents : 20 Total Citations : 58 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 7 Citation Count
- F01D Class
- 31.14 % this patent is cited more than
- 7 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
---|---|---|---|---|
7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Sep 6, 2025 |
11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 6, 2029 |
Fee | Large entity fee | small entity fee | micro entity fee |
---|---|---|---|
Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

Legal Events
Date | Code | Event | Description |
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Apr 11, 2022 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Apr 11, 2022 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Mar 06, 2022 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Mar 06, 2022 |
Oct 25, 2021 | FEPP | FEE PAYMENT PROCEDURE | free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Mar 06, 2018 | I | Issuance | |
Feb 14, 2018 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Nov 19, 2015 | P | Published | |
Jul 11, 2015 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GUPTA, MOHIT;HOLDEN, ERICA;HUDSON, ROBERT;AND OTHERS;SIGNING DATES FROM 20150521 TO 20150522;REEL/FRAME:036063/0493 Owner name: SIEMENS ENERGY, INC., FLORIDA |
Apr 29, 2015 | F | Filing |

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