Hollow poppet valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 20, 2018
Issued Date -
N/A
app pub date -
Apr 11, 2013
filing date -
Apr 11, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A hollow poppet valve (10) having an improved heat transfer capability is provided. The valve has an internal cavity (S), extending from within a valve head (14) into a stem (12) of the valve, is loaded with a coolant (19) together with an inert gas. The coolant in the valve head (14) is stirred by swirl flows of the coolant generated during reciprocal motions of the valve. A multiplicity of swirl-forming protrusions are formed on at least on one of the bottom and the ceiling of the valve head cavity (S1) in such a way that swirl flows (F20, F30) of coolant are generated by the protrusions in the valve head cavity (S1) during reciprocal motions of the valve to thereby stir the coolant in the circumferential direction of the cavity (S1).
First Claim
Other Claims data not available
Family
International Classification(s)
- 2013 Application Filing Year
- F01L Class
- 369 Applications Filed
- 352 Patents Issued To-Date
- 95.40 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 3 Citation Count
- F01L Class
- 37.07 % 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 | Sep 20, 2025 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 20, 2029 |
