초록 ▼

A bleed valve which is intended for the fuel tank of a vehicle has a housing, a floating body disposed in such a manner as to be able to move in the longitudinal direction. A rim of an outlet orifice forms a valve seat for a sealing element which is supported by a support disc, wherein the support d

A bleed valve which is intended for the fuel tank of a vehicle has a housing, a floating body disposed in such a manner as to be able to move in the longitudinal direction. A rim of an outlet orifice forms a valve seat for a sealing element which is supported by a support disc, wherein the support disc is articulated in a cardanic manner on the floating body. The sealing element is disposed in such a manner as to be able to move according to the movement of the floating body between a position which closes the outlet orifice and a position which opens same, wherein as a result of the said articulation of the support disc on the floating body positional changes, e.g. inclined positions, which are caused by the drive operation of the vehicle do not impair the sealing function.

대표청구항 ▼

What is claimed is: 1. A bleed valve for the fuel tank of a vehicle, said bleed valve comprising: a cylindrical housing having a housing base, the housing being intended for attachment to a wall of the fuel tank, said housing having a topside with an outlet orifice and a longitudinal axis; at least

What is claimed is: 1. A bleed valve for the fuel tank of a vehicle, said bleed valve comprising: a cylindrical housing having a housing base, the housing being intended for attachment to a wall of the fuel tank, said housing having a topside with an outlet orifice and a longitudinal axis; at least one inlet orifice for communicating with the head space of the fuel tank; a floating body within the housing; a spring supporting the floating body on the housing base, said floating body being moveable longitudinally within the housing; a valve seat for the outlet orifice defined by a rim; a sealing element moveable according to movement of the floating body between a position which closes the outlet orifice and a position which opens the outlet orifice, said sealing element comprising a projection forming a fluid conduit extending from said sealing element towards said floating body, said fluid conduit having an open end facing said floating body; a guide mandrel fixedly attached to an end of the floating body facing said valve seat for movement with said floating body, said guide mandrel being configured to close said fluid conduit opening when said valve is in the closed position, said sealing element fluid conduit extending towards said mandrel such that said mandrel is capable of sealingly engaging said open end of said fluid conduit and urging said sealing element against said valve seat when said valve is in the closed position; a support disk connected to said floating body, the support disk having an integral annular flange and a counter surface facing said sealing element such that in the closed position of the bleed valve the sealing element is fixed between the valve seat and the counter surface, said support disk being mounted for pivotal movement about mutually perpendicular pivot axes; and a pair of mutually diametrically opposed axially extending retainer elements attached to the floating body, each retainer element extending upwardly from the floating body and terminating in an abutment section that extends over said annular flange for engagement therewith, and wherein said retainer elements are differently dimensioned with respect to one another such that the abutment sections are at different elevations with respect to the annular flange thereby causing one of said mutually perpendicular pivot axes to be inclined relative to said longitudinal axis of the housing as said retainer elements engage said annular flange when said valve moves from the closed position to the open position, said differing elevations of the abutment sections establishing said pivot axis which is inclined with respect to the longitudinal axis of the cylindrical housing, said floating body further including a ring-like arrangement of support fingers facing towards the support disk, the fingers being spaced apart in the peripheral direction and having radially inwardly facing surfaces for exerting a radial guiding effect upon a facing surface of the support disc. 2. A bleed valve according to claim 1, wherein the valve seat extends radially in relation to the longitudinal axis of the cylindrical housing. 3. A bleed valve according to claim 1, wherein the valve seat extends perpendicularly with respect to the longitudinal axis of the housing. 4. A bleed valve according to claim 1, wherein the sealing element is formed as a sealing disk having the fluid conduit forming projection integrally formed therewith, said support disk has a centrally positioned opening through which said fluid conduit extends to said guide mandrel, said guide mandrel is conically shaped and integrally formed on the floating body, and said guide mandrel protrudes from said floating body and sealingly closes the fluid conduit opening of the projection when the valve is in the closed position. 5. A bleed valve according to claim 2, wherein the sealing element comprises a sealing disk having said fluid conduit projecting centrally therefrom, and said guide mandrel is conically shaped and protrudes from said floating body to sealingly close the fluid conduit opening of the projection when the valve is in the closed position. 6. A bleed valve according to claim 3, wherein the sealing element comprises a sealing disk having said fluid conduit projecting centrally therefrom, and said guide mandrel is conically shaped and protrudes from said floating body to sealingly closes the fluid conduit opening of the projection when the valve is in the closed position. 7. A bleed valve for the fuel tank of a vehicle, said bleed valve having an open and closed position, said bleed valve comprising: a cylindrical housing attachable to the wall of the fuel tank, said housing having a base, a topside, an outlet orifice, and a longitudinal axis therethrough; at least one inlet orifice capable of fluid communication with the head space of the fuel tank; a floating body moveable longitudinally within said housing to close and open said bleed valve; a spring supporting the floating body; a valve seat for the outlet orifice defined by an opening in fluid communication with said outlet orifice; a sealing element moveable in response to movement of said floating body between a position which closes the outlet orifice and a position which opens the outlet orifice, said sealing element having a fluid conduit formed within a projection extending from said sealing element towards said floating body, said fluid conduit having an open end facing said floating body; a guide mandrel attached to an end of the floating body facing said valve seat for movement with said floating body, said guide mandrel being configured to close said fluid conduit opening when said valve is in the closed position, said sealing element fluid conduit extending towards said mandrel such that said mandrel is capable of sealingly engaging said open end of said fluid conduit and urging said sealing element against said valve seat when said valve is in the closed position; a support disc connected to said floating body, the support disc having an annular flange and an opening formed therein, said support disk being mounted for pivotal movement about mutually perpendicular pivot axes, said projection of said sealing element extending through said support disc opening to said mandrel; and a pair of mutually diametrically opposed retainer elements attached to the floating body for movement therewith, each retainer element extending axially from the floating body and terminating in an abutment section that extends over said annular flange to be engageable therewith, wherein said abutment sections are at different elevations with respect to the annular flange thereby causing one of said mutually perpendicular pivot axes to be inclined relative to said longitudinal axis of the housing when said retainer elements engage said annular flange as said valve moves from the closed position to the open position, said differing elevations of the abutments establishing said inclined pivot axis which is inclined with respect to the longitudinal axis of the cylindrical housing, said floating body further including a ring-like arrangement of support fingers facing towards the support disk, the fingers being spaced apart in the peripheral direction and having radially inwardly facing surfaces for exerting a radial guiding effect upon a facing surface of the support disc.