Patent US5337721A successfully refreshed from Google Patents.
US5337721A
Expired / Lapsed
US
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Fuel vapor processing apparatus
Assignee: Aisan Industry Co Ltd
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Filing: 1993-07-30
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Granted: 1994-08-16
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Expires: 2013-07-30
Abstract
Abstract A fuel vapor processing apparatus of an internal combustion engine for a vehicle comprises a main canister, a sub-canister connected to the main canister in series and located closer to the atmosphere than the main canister is, a first one-way valve through which the fluid flows from the main canister to the sub-canister, and a second one-way valve through which the fluid flows in the reverse direction, the first and second one-way valves being provided in parallel between the main canister and the sub-canister.
Inventors
- 👤 Kazusato Kasuya
- 👤 Mitsuo Sugiura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:47
CPC Classifications
F; F02; F02M; F02M25/00; F02M25/08; F02M25/0854; F02M2025/0845
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
85 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, a first one-way valve through which the fluid flows from said main canister to said sub-canister, and a second one-way valve through which the fluid flows from said sub-canister to said main canister, said first and second one-way valves being provided in parallel between said main canister and said sub-canister.
Claim 2
Dependent Claim
85 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, a first one-way valve through which the fluid flows from said main canister to said sub-canister, and a second one-way valve through which the fluid flows from said sub-canister to said main canister, said first and second one-way valves being provided in parallel between said main canister and said sub-canister.
Claim 3
Dependent Claim
29 words
A fuel vapor processing apparatus according to claim 1, wherein a valve opening pressure of said first one-way valve is set higher than that of said second one-way valve.
Claim 4
Dependent Claim
47 words
A fuel vapor processing apparatus according to claim 2, wherein said first one-way valve includes a spring which presses a valve body on a valve seat, and said second one-way valve includes a valve body which is closely fitted on a valve seat by its own weight.
Claim 5
Dependent Claim
46 words
A fuel vapor processing apparatus according to claim 1, wherein said first one-way valve includes a spring which presses a valve body on a valve seat, and said second one-way valve includes a valve body of a mushroom-like shape which is made of an elastic material.
Claim 6
Dependent Claim
89 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, and a thermally responsive valve whose opening area varies in accordance with the temperature, said thermally responsive valve being provided between said main canister and said sub-canister and constructed in such a manner that the opening area of said thermally responsive valve is large at a high temperature and small at a low temperature.
Claim 7
Dependent Claim
89 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, and a thermally responsive valve whose opening area varies in accordance with the temperature, said thermally responsive valve being provided between said main canister and said sub-canister and constructed in such a manner that the opening area of said thermally responsive valve is large at a high temperature and small at a low temperature.
Claim 8
Dependent Claim
78 words
A fuel vapor processing apparatus according to claim 5, wherein said thermally responsive valve comprises a valve seat and a spherical valve body made of bimetal which is provided on the valve seat, said valve body including a small hole formed in the center and being designed to be curved to project reversely in accordance with the temperature so that the valve body is curved to be closely fitted on said valve seat when the temperature is low.
Claim 9
Dependent Claim
66 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, and an open and close valve which is opened by a suction-pipe negative pressure of the engine, said open and close valve being provided between said main canister and said sub-canister.
Claim 10
Dependent Claim
66 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, and an open and close valve which is opened by a suction-pipe negative pressure of the engine, said open and close valve being provided between said main canister and said sub-canister.
Claim 11
Dependent Claim
95 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, and a cooling water responsive valve which is operated in accordance with the temperature of cooling water of the engine, said cooling water responsive valve being provided between said main canister and said sub-canister and designed in such a manner that an opening area of said cooling water responsive valve is larger as the temperature of said cooling water rises.
Claim 12
Dependent Claim
95 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, and a cooling water responsive valve which is operated in accordance with the temperature of cooling water of the engine, said cooling water responsive valve being provided between said main canister and said sub-canister and designed in such a manner that an opening area of said cooling water responsive valve is larger as the temperature of said cooling water rises.
Claim 13
Dependent Claim
72 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, and a solenoid valve which is provided between said main canister and said sub-canister and connected in such a manner that the solenoid valve is opened when an ignition key switch of the vehicle is turned on.
Claim 14
Dependent Claim
72 words
A fuel vapor processing apparatus of an internal combustion engine for a vehicle, comprising a main canister, a sub-canister connected to the main canister in series and disposed between the atmosphere and the main canister, and a solenoid valve which is provided between said main canister and said sub-canister and connected in such a manner that the solenoid valve is opened when an ignition key switch of the vehicle is turned on.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-08-15 | 1998-02-14 | 1998-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-15 | 2002-02-14 | 2002-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-15 | 2006-02-14 | 2006-08-16 | $7700.00 | Window Closed / Lapsed |