IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0188109
(2005-07-25)
|
등록번호 |
US-7686030
(2010-04-23)
|
우선권정보 |
JP-P.2004-251723(2004-08-31) |
발명자
/ 주소 |
- Furuya, Masashi
- Matsuo, Shinichi
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
12 |
초록
▼
A cut valve which is installed on a fuel tank and is adapted to shut off a vent passage between the interior of the fuel tank and the outside when a fuel level in the fuel tank has risen, including: a housing having: a cover having a lead-out pipe connected to an external pipe; a tubular body having
A cut valve which is installed on a fuel tank and is adapted to shut off a vent passage between the interior of the fuel tank and the outside when a fuel level in the fuel tank has risen, including: a housing having: a cover having a lead-out pipe connected to an external pipe; a tubular body having a vent hole communicating with the lead-out pipe; and a bottom portion closing a lower surface of the tubular body; and a float valve which is adapted to open or close the vent hole by coming into contact with and moving away from a valve seat provided at a peripheral edge of the vent hole in the ceiling portion, wherein an inner periphery of the valve seat has a tapered shape in which its diameter is gradually enlarged in a direction toward the float valve.
대표청구항
▼
What is claimed is: 1. A cut valve which is installed on a fuel tank and is adapted to shut off a vent passage between the interior of the fuel tank and the outside when a fuel level in the fuel tank has risen, comprising: a housing including: a cover having a lead-out pipe connectable to an extern
What is claimed is: 1. A cut valve which is installed on a fuel tank and is adapted to shut off a vent passage between the interior of the fuel tank and the outside when a fuel level in the fuel tank has risen, comprising: a housing including: a cover having a lead-out pipe connectable to an external pipe; a tubular body provided with a ceiling portion connected to a lower side of the cover and having a vent hole communicating with the lead-out pipe; and a bottom portion closing a lower surface of the tubular body; and a float valve which is slidably accommodated in the housing and is adapted to open or close the vent hole by coming into contact with and moving away from a valve seat provided at a peripheral edge of the vent hole in the ceiling portion, said float valve comprising ribs formed along an axial direction on an outer periphery of the float valve and projecting upwardly of an upper surface of the float valve, said ribs comprising projecting portions, wherein the ceiling portion of the tubular body is formed to have: the valve seat that defines the vent hole; a protruding portion that is formed radially outward from the valve seat to protrude toward the float valve; and a recessed portion that is formed of radially outward from the protruding portion, said projecting portions being configured to insert into said recessed portion, wherein a radial width of the protruding portion is wider than that of the recessed portion, wherein a size of said projecting portions in an upward direction from the upper surface of the float valve is larger than an interval between the upper surface of the float valve and the protruding portion of the tubular body in a state in which the float valve has floated up to close the vent hole, wherein both of the upper surface of the float valve and a lower surface of the protruding portion are formed in a substantially planar-shape, and wherein, in a state where the float valve has floated up to close the vent hole, the upper surface of the float valve and the lower surface of the protruding portion are substantially in parallel with each other, and further comprising an annular rib extending upright from said ceiling portion of said tubular body, said annular rib surrounding said valve seat. 2. The cut valve according to claim 1, wherein the resin material of a sliding grade is one in which a lubricant selected from silicone-, paraffin-, fatty acid ester-, and molybdenum dioxide-based lubricants is added to a resin selected from polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyamide (PA), polyoxymethylene (POM), and polycarbonate (PC). 3. The cut valve according to claim 1, wherein the interval between the upper surface of the float valve and the protruding portion of the tubular body in the state in which the float valve has floated up and closed the vent hole is 2 to 3 mm. 4. The cut valve according to claim 1, wherein said cover comprises a substantially cylindrical plate having an annular rib extending downward from a peripheral edge of said substantially cylindrical plate. 5. The cut valve according to claim 1, wherein said tubular body further comprises a cylindrical peripheral wall which is integrally formed with said ceiling portion. 6. The cut valve according to claim 1, wherein said ceiling portion comprises a flange portion formed on a peripheral edge of said ceiling portion. 7. The cut valve according to claim 1, wherein said ceiling portion further comprises a plurality of ribs provided upright from said ceiling portion. 8. The cut valve according to claim 7, wherein said ceiling portion further comprises a plurality of insertion holes disposed between said plurality of ribs. 9. The cut valve according to claim 7, wherein said cover comprises a plurality of engaging pieces, which engage said plurality of insertion holes. 10. The cut valve according to claim 9, wherein said tubular body further comprises a plurality of pawl portions, which engage said engaging pieces. 11. The cut valve according to claim 5, wherein said tubular body comprises a plurality of through holes formed in said cylindrical peripheral wall. 12. A fuel tank, comprising: a cut valve, which is adapted to shut off a vent passage between the interior of the fuel tank and the outside when a fuel level in the fuel tank has risen, said cut valve comprising: a housing comprising: a cover having a lead-out pipe connectable to an external pipe; a tubular body provided with a ceiling portion connected to a lower side of the cover and having a vent hole communicating with the lead-out pipe; and a bottom portion closing a lower surface of the tubular body; and a float valve which is slidably accommodated in the housing and is adapted to open or close the vent hole by coming into contact with and moving away from a valve seat provided at a peripheral edge of the vent hole in the ceiling portion, said float valve comprising ribs formed along an axial direction on an outer periphery of the float valve and projecting upwardly of an upper surface of the float valve, said ribs comprising projecting portions, wherein the ceiling portion of the tubular body is formed to have: the valve seat that defines the vent hole; a protruding portion that is formed radially outward from the valve seat to protrude toward the float valve; and a recessed portion formed radially outward from the protruding portion said projecting portions being configured to insert into said recessed portion, and wherein a radial width of the protruding portion is wider than that of the recessed portion, wherein a size of said projecting portions in an upward direction from the upper surface of the float valve is larger than an interval between the upper surface of the float valve and the protruding portion of the tubular body in a state in which the float valve has floated up to close the vent hole, wherein both of the upper surface of the float valve and a lower surface of the protruding portion are formed in a substantially planar-shape, and wherein, in a state where the float valve has floated up to close the vent hole, the upper surface of the float valve and the lower surface of the protruding portion are substantially in parallel with each other, further comprising an annular rib extending upright from said ceiling portion of said tubular body, said annular rib surrounding said valve seat. 13. The fuel tank according to claim 12, wherein the resin material of a sliding grade is one in which a lubricant selected from silicone-, paraffin-, fatty acid ester- and molybdenum dioxide-based lubricants is added to a resin selected from polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyamide (PA), polyoxymethylene (POM), and polycarbonate (PC). 14. The fuel tank according to claim 12, wherein the interval between the upper surface of the float valve and the protruding portion of the tubular body in the state in which the float valve has floated up and closed the vent hole is 2 to 3 mm. 15. A cut valve, comprising: a housing comprising: a cover having a lead-out pipe connectable to an external pipe; and a tubular body provided with a ceiling portion connected to a lower side of the cover and having a vent hole communicating with the lead-out pipe and a valve seat provided at a peripheral edge of said vent hole; and a float valve, which is slidably accommodated in the housing, said float valve comprising ribs formed along an axial direction on an outer periphery of the float valve and projecting upwardly of an upper surface of the float valve, said ribs comprising projecting portions, wherein the ceiling portion of the tubular body is formed to have: the valve seat that defines the vent hole; a protruding portion that is formed radially outward from the valve seat to protrude toward the float valve; and a recessed portion formed around of radially outward from the protruding portion said projecting portions being configured to insert into said recessed portion, wherein a radial width of the protruding portion is wider than that of the recessed portion, wherein a size of said projecting portions in an upward direction from the upper surface of the float valve is larger than an interval between the upper surface of the float valve and the protruding portion of the tubular body in a state in which the float valve has floated up to close the vent hole, wherein both of the upper surface of the float valve and a lower surface of the protruding portion are formed in a substantially planar-shape, and wherein, in a state where the float valve has floated up to close the vent hole, the upper surface of the float valve and the lower surface of the protruding portion are substantially in parallel with each other, further comprising an annular rib extending upright from said ceiling portion of said tubular body, said annular rib surrounding said valve seat. 16. The cut valve according to claim 15, wherein the interval between the upper surface of the float valve and the protruding portion of the tubular body in the state in which the float valve has floated up and closed the vent hole is 2 to 3 mm. 17. The cut valve according to claim 1, wherein an inner periphery of the valve seat has a tapered shape in which its diameter is gradually enlarged in a direction toward the float valve at an angle of 31 degrees to 34 degrees with respect to a central axis of the vent hole. 18. The fuel tank according to claim 12, wherein an inner periphery of the valve seat has a tapered shape in which its diameter is gradually enlarged in a direction toward the float valve at an angle of 31 degrees to 34 degrees with respect to a central axis of the vent hole. 19. The cut valve according to claim 15, wherein an inner periphery of the valve seat has a tapered shape in which its diameter is gradually enlarged in a direction toward the float valve at an angle of 31 degrees to 34 degrees with respect to a central axis of the vent hole. 20. The cut valve according to claim 1, wherein the valve seat and the protruding portion are separately formed to define a gap therebetween.
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