Spring wing controller
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 22, 2016
Grant Date -
Jun 11, 2015
app pub date -
Dec 11, 2013
filing date -
Dec 11, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A controller for a spring wing on a frog that utilizes a floating piston rod carrying a fixed piston valve and a free-moving piston head is provided. When the piston rod is actuated by the opening movement of the spring wing, the piston valve separates from the piston head briefly, allowing oil to flow through the piston head in a relatively unrestricted manner. The piston head is spring biased towards the piston valve; upon contact between the piston head and the piston valve, the oil flow through the piston head stops, helping to hold the spring wing in the open position. When the spring wing begins to close, the adjustable oil flow through the controller allows the piston rod to move at a controlled rate, thereby controlling the closure rate of the spring wing.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2013 Application Filing Year
- B61L Class
- 146 Applications Filed
- 133 Patents Issued To-Date
- 91.10 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- B61L Class
- 0 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 22, 2027 |
