Two-stage changeover valve
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 12, 2017
Issued Date -
N/A
app pub date -
Sep 22, 2015
filing date -
Sep 25, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A two-stage changeover valve is provided in a vaporized fuel passage connected between a fuel tank and a canister. A valve member is movably accommodated in a fluid passage formed in a valve housing. A valve seat is formed at an inner peripheral wall of the valve housing, so that the valve member is operatively seated on the valve seat. A restricted communication hole is formed in the valve member, so that an upstream side and a downstream side of the valve member are communicated with each other, even when the valve member is seated on the valve seat. The restricted communication hole is formed in a Laval-nozzle shape, so that vaporized fuel passing through the restricted communication hole is accelerated. As a result, a process for depressurizing inner pressure of the vaporized fuel in the fuel tank can be carried out in a shorter time.
First Claim
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International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- F16K Class
- 31.02 % this patent is cited more than
- 8 Age
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