Spring system of a rail vehicle
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Jan 30, 2018
Issued Date -
N/A
app pub date -
Dec 16, 2015
filing date -
Dec 17, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A rail vehicle spring system has a spring strut, arranged between a bogie and carriage body of the rail vehicle, and includes a cylinder and a piston in the cylinder. Piston spaces are defined below and above the piston head. The piston or the cylinder is connectable with the bogie, while the other component is connectable with the carriage body. A spring cushions the body relative to the bogie, and a hydraulic system is connected with at least one of the piston spaces to charge the space with hydraulic medium. The spring surrounds the cylinder and is contracted by the piston when an excess pressure exists in the lower piston space with respect to the upper piston space, and an entraining element is adjoined by the spring. Only when an excess pressure exists in the lower piston space does the piston rod exerts a force on the entraining element.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| DE | B4 | DE102015016024 | Dec 11, 2015 |
| CN | B | CN105711613 | Dec 17, 2015 |
International Classification(s)
- 2015 Application Filing Year
- B61F Class
- 79 Applications Filed
- 71 Patents Issued To-Date
- 89.88 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- B61F Class
- 33.33 % this patent is cited more than
- 7 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 30, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 30, 2029 |
