Semi-active suspension system with control circuit having a direct control loop including an inverse model of the damper
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Sep 5, 2000
Grant Date -
N/A
app pub date -
Jul 8, 1997
filing date -
Jul 6, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a semi-active damper controlled by a control circuit including a direct control loop made up of an inverse model of the damper. The inverse model of the damper determines an ideal value for an electrical current i.sub.th for controlling a compression controlled-restriction valve and an expansion controlled-restriction valve on the basis of a measured value for a relative speed y between the two ends of the damper and on the basis of a force reference value Fc. The semi-active damper of the invention is applicable as a transverse secondary suspension for a passenger rail vehicle.
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 | |
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GEC ALSTHOM TRANSPORT SA | 75016 PARIS |
International Classification(s)

- 1997 Application Filing Year
- F16F Class
- 294 Applications Filed
- 144 Patents Issued To-Date
- 48.98 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Boichot, Philippe | Quetigny, FR | 5 | 66 |
# of filed Patents : 5 Total Citations : 66 | |||
Kirat, Regis | Le Creusot, FR | 4 | 64 |
# of filed Patents : 4 Total Citations : 64 |
Cited Art Landscape
- No Cited Art to Display

Patent Citation Ranking
- 35 Citation Count
- F16F Class
- 93.54 % this patent is cited more than
- 25 Age
Forward Cite Landscape
- No Forward Cites to Display

Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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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 10, 2017 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Mar 10, 2017 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Mar 10, 2017 |
Mar 10, 2017 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | |
Oct 21, 2016 | REMI | MAINTENANCE FEE REMINDER MAILED | |
Sep 10, 2012 | FPAY | FEE PAYMENT | year of fee payment: 4 |
Mar 10, 2009 | I | Issuance | |
Apr 12, 2007 | P | Published | |
Nov 10, 2005 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DIMIG, STEVEN J.;JANSSEN, DAVID C.;ESSER, ERIK;REEL/FRAME:017143/0038 Owner name: STRATTEC SECURITY CORPORATION, WISCONSIN Effective Date: Nov 10, 2005 |
Oct 06, 2005 | F | Filing | |
Oct 06, 2005 | PD | Priority Date |

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