IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0640683
(2003-08-14)
|
우선권정보 |
JP-0243585 (2002-08-23) |
발명자
/ 주소 |
- Yamada, Norihiro
- Mori, Eishin
- Yoshida, Keisuke
- Miwa, Koji
- Ishikawa, Takashi
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
2 |
초록
▼
An apparatus is for inhibiting fuels from flowing out of fuel tanks, and includes a housing having an evaporator opening and a fuel opening, a double-floating valve and a cover having a cylinder-shaped liquid receptacle. Alternatively, the apparatus can include a housing having an evaporator opening
An apparatus is for inhibiting fuels from flowing out of fuel tanks, and includes a housing having an evaporator opening and a fuel opening, a double-floating valve and a cover having a cylinder-shaped liquid receptacle. Alternatively, the apparatus can include a housing having an evaporator opening, a fuel opening and a substantially cylinder-shaped dam, a double-floating valve, and a cover free from the cylinder-shaped liquid receptacle. The apparatus can securely inhibit liquid fuels from flowing into a canister even when liquid fuels spout through the valve hole and the evaporator opening, because liquid fuels collide with the liquid receptacle or the dam to return back into fuel tanks through the evaporator opening.
대표청구항
▼
1. An apparatus for inhibiting fuels from flowing out of fuel tanks, the apparatus comprising:a housing fixed to a top of a fuel tank, and having an evaporator opening at a top thereof and a fuel opening at a bottom thereof, the evaporator opening communicating with a canister, the fuel opening enab
1. An apparatus for inhibiting fuels from flowing out of fuel tanks, the apparatus comprising:a housing fixed to a top of a fuel tank, and having an evaporator opening at a top thereof and a fuel opening at a bottom thereof, the evaporator opening communicating with a canister, the fuel opening enabling a liquid fuel held in the fuel tank to enter the housing; a double-floating valve accommodated in the housing, and comprising a lower float, an upper float and a ring-shaped valve seat, the lower float floating on the liquid fuel and moving up and down in accordance with up-and-down movements of a level of the liquid fuel, the upper float held on a top surface of the lower float so as to be movable up and down relatively with respect to the lower float and having a minor-diameter valve hole opened or closed by the lower float, the valve seat held to a top surface of the upper float and opening or closing the evaporator opening by the up-and-down movements of the upper float accompanied by the up-and-down movements of the lower float; and a cover disposed above the evaporator opening, covering the housing, communicating with the canister, and having a cylinder-shaped liquid receptacle disposed on an inner surface of the cover facing the evaporator opening, protruding toward the evaporator opening and having a diameter larger than an inside diameter of the valve hole, whereby detecting that the fuel tank is filled up with the liquid fuel by increasing a gas pressure within the fuel tank when the level of the liquid fuel within the fuel tank fully closes the fuel opening, and closing the evaporator opening with the valve sheet by moving the double-floating valve upward when the level of the liquid fuel rises abnormally. 2. The apparatus set forth in claim 1, wherein the evaporator opening, the valve hole and the cylinder-shaped liquid receptacle are disposed coaxially.3. The apparatus set forth in claim 1, wherein the housing further has a cylinder-shaped liquid reservoir at a top thereof, the liquid reservoir opened under the cylinder-shaped liquid receptacle and communicating with the evaporator opening.4. The apparatus set forth in claim 1, wherein the housing further has a cylinder which extends downward and whose bottom-end opening forms the fuel opening.5. An apparatus for inhibiting fuels from flowing out of fuel tanks, the apparatus comprising:a housing fixed to a top of a fuel tank, and having an evaporator opening at a top thereof, a fuel opening at a bottom thereof and a substantially cylinder-shaped dam, the evaporator opening communicating with a canister, the fuel opening enabling a liquid fuel held in the fuel tank to enter the housing, the cylinder-shaped dam disposed on a top surface of the housing around the evaporator opening and built upward in an upright position; a double-floating valve accommodated in the housing, and comprising a lower float, an upper float and a ring-shaped valve seat, the lower float floating on the liquid fuel and moving up and down in accordance with up-and-down movements of a level of the liquid fuel, the upper float held on a top surface of the lower float so as to be movable up and down relatively with respect to the lower float and having a minor-diameter valve hole opened or closed by the lower float, the valve seat held to a top surface of the upper float and opening or closing the evaporator opening by the up-and-down movements of the upper float accompanied by the up-and-down movements of the lower float; and a cover disposed above the evaporator opening, covering the housing, and communicating with the canister, whereby detecting that the fuel tank is filled up with the liquid fuel by increasing a gas pressure within the fuel tank when the level of the liquid fuel within the fuel tank fully closes the fuel opening, and closing the evaporator opening with the valve sheet by moving the double-floating valve upward when the level of the liquid fuel rises abnormally. 6. The apparatus set forth in claim 5, wherein a top surface of the housing tapers from wide to narrow in the direction toward the evaporator opening inside the dam.7. The apparatus set forth in claim 5, wherein the housing further has a cylinder which extends downward and whose bottom-end opening forms the fuel opening.
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