WO2018212806A1 - Bouchon cache-prise pour réservoir de liquide de véhicule motorisé - Google Patents

Bouchon cache-prise pour réservoir de liquide de véhicule motorisé Download PDF

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Publication number
WO2018212806A1
WO2018212806A1 PCT/US2018/015650 US2018015650W WO2018212806A1 WO 2018212806 A1 WO2018212806 A1 WO 2018212806A1 US 2018015650 W US2018015650 W US 2018015650W WO 2018212806 A1 WO2018212806 A1 WO 2018212806A1
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WO
WIPO (PCT)
Prior art keywords
neck
cap
reservoir
annular
ring
Prior art date
Application number
PCT/US2018/015650
Other languages
English (en)
Inventor
Dominique Vaginet
Original Assignee
Illinois Tool Works Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc. filed Critical Illinois Tool Works Inc.
Priority to EP20166959.5A priority Critical patent/EP3699411A3/fr
Priority to US16/613,628 priority patent/US20200208564A1/en
Priority to EP18703466.5A priority patent/EP3625444A1/fr
Publication of WO2018212806A1 publication Critical patent/WO2018212806A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • F01P11/0209—Closure caps
    • F01P11/0214—Mounting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • F01P11/0209—Closure caps
    • F01P11/0238—Closure caps with overpressure valves or vent valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/029—Expansion reservoirs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • F01P11/0209—Closure caps
    • F01P11/0247—Safety; Locking against opening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • F01P11/0209—Closure caps
    • F01P11/0214—Mounting
    • F01P2011/0219—Mounting using bayonet connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
    • F01P11/0204—Filling
    • F01P11/0209—Closure caps
    • F01P11/0214—Mounting
    • F01P2011/0233—Venting

Definitions

  • the invention relates to a safety cap for a liquid reservoir, in particular for a motor vehicle, the reservoir being, for example, a motor vehicle radiator expansion vessel.
  • Patent document FR-A1-2 646 405 is representative of a known safety cap or valv cap.
  • a safety cap or valve cap of the type described in that document comprises a cell or valve housing a first valve shutter held in the bottom of the cell using a spring.
  • the upper end of the spring comes into abutment against a fixed element in order thus to allow the valve shutter to move vertically in the event of an overpressure inside the reservoir, until the internal pressure returns to normal.
  • a second valve shutter which deforms or is moved by the compression of another spring, in the event of a depression in the reservoir, making it possible to reestablish the lack of pressure.
  • This safety cap therefore makes it possible, in the event of a depression or an overpressure, to be able to return the cooling circuit to the operating pressure prescribed by the manufacturer.
  • overpressure safety conditions are of the order of 1.4 bar, which means that the safety cell operates only for pressures above these limits.
  • the value needs to be as low as possible, currently 25 mbar.
  • the opening brought about by the movement of each valve shutter is achieved through the inherent elasticity of the associated spring which compresses as soon as the pressure in the circuit reaches the critical conditions imposed by the manufacturer.
  • the safety cap is either screwed onto a neck of the reservoir or fixed to this neck by a bayonet effect.
  • Bayonet fastening has the advantage of being quick to employ.
  • the valve shutter spring is generally used for sealing the reservoir closed, and this reduces the precision of the valve and imposes dimensional and mechanical constrains on the equipment housing it.
  • This disadvantage can be avoided by using a two-spring valve, as mentioned in the foregoing, but that leads to a significant increase in the cost of the cap.
  • Screw-fastening does not exhibit these disadvantages but takes longer to achieve (several turns of the cap are needed as compared with just a portion of a turn in the case of a bayonet fastening), and this constitutes a disadvantage on an assembly line.
  • the present invention proposes a solution to at least some of these problems which is simple, effective and economical.
  • the invention thus proposes a safety cap for a fluid reservoir, in particular for a motor vehicle, said cap being configured to be attached and fixed to a neck of said reservoir, said cap comprising:
  • a safety cell configured to allow the passage of gas from the interior to the exterior of the reservoir, and/or vice versa, when the cap is fixed to said neck and when a pressure difference between the interior and the exterior of the reservoir is greater or greater than at least one predetermined threshold value, characterized in that it additionally comprises:
  • a ring comprising means for fixing to said neck and a second screw thread configured to cooperate with said first screw thread, said cell being at least partly housed in the neck and surrounded by said cover and/or said ring when the cap is fixed on said neck, and in that said ring comprises an inner annular surface intended to surround, with clearance, an outer annular surface of said neck so as to define a space for the passage of gas between the ring and the neck.
  • the cap according to the invention may comprise one or more of the following features, considered in isolation from one another or in combination with one another:
  • said ring comprises ribs projecting from said inner surface and able to cooperate by bearing and/or sliding with said outer surface of said neck,
  • said ring comprises means for fixing to said neck by bayonet effect and/or elastic snap-fastening
  • said ring comprises inner annular rim sectors which are intended to cooperate by bayonet effect with outer annular rim sectors of said neck,
  • said ring comprises circumferential through-slots extending along and in proximity to said sectors so as to provide them with a certain degree of flexibility
  • said second screw thread is an external screw thread
  • said ring comprises second elastic snap-fastening means or means of determining a hard point, which are configured to collaborate with complementary means of said cover, at the end of the screwing-on thereof,
  • the cap additionally comprises an annular seal mounted around said cell and intended to cooperate with an inner annular surface of said neck,
  • the cap additionally comprises a split ring an inner periphery of which is engaged in an outer annular groove of said cell and an outer periphery of which is engaged in an inner annular groove of said cover,
  • said ring comprises slideways configured to cooperate with rails of said neck in order to produce guiding by axial sliding when mounting said ring on said neck,
  • first elastic snap-fastening means intended to cooperate with complementary elastic snap-fastening means of at least one of said rails.
  • the present invention also relates to a fluid reservoir, in particular for a motor vehicle, said reservoir comprising a neck on which there is intended to be attached and fixed a cap as described hereinabove.
  • Said neck may comprise a cylindrical wall comprising outer annular rim sectors which are intended to cooperate by bayonet effect with inner annular rim sectors of said cap.
  • the reservoir according to the invention may comprise one or more of the following features, considered in isolation from one another or in combination with one another:
  • said cylindrical wall comprises a crenellated free annular edge comprising solid parts alternating with recessed parts for the passage of gas
  • said neck comprises an annular shoulder for the axial bearing of said cap and onto which a gas passage orifice can open,
  • the reservoir comprises a gas passage duct defining said orifice and extending substantially over the height of said reservoir
  • said neck comprises a cylindrical wall and an annular row of rails projecting from an outer cylindrical surface of this cylindrical wall, said rails being substantially parallel to one another and to an axis of revolution of this cylindrical wall
  • the present invention also relates to an assembly comprising a reservoir and a cap both as described hereinabove, said cap being:
  • Said recessed parts of said neck may be in fluidic communication with said space defined between said cap and said neck.
  • the present invention also relates to an assembly comprising a fluid reservoir, particularly for a motor vehicle, and a cap, said reservoir comprising a neck equipped with a screw thread, said cap comprising a screwing cover comprising a screw thread, and a safety cell configured to allow the passage of gas from the interior to the exterior of the reservoir, and/or vice versa, when the cap is screwed onto said neck and when a pressure difference between the interior and the exterior of the reservoir is greater or less than at least one predetermined threshold value, characterized in that said safety cell comprises an annular seal which is configured to seal against an annular wall of said neck when the cap is screwed onto the neck using said screw threads, and which is further configured to collaborate with this annular wall by simply bearing with elastic deformation in order to provide a stable transport position for said assembly in which the cap is premounted on the neck and said screw threads are not yet cooperating with one another.
  • the assembly according to the invention may comprise one or more of the following features, considered in isolation from one another or in combination with
  • said annular seal is housed in an outer annular groove of a substantially cylindrical body of said cell, which is intended to be surrounded by said annular wall,
  • said neck is of the coaxial double-walled type and comprises an outer annular wall bearing said screw thread and an inner annular wall configured to cooperate with said seal,
  • the inner annular wall at its upper end has a free annular edge which is crenellated and exhibits an alternation of solid parts and of recessed parts which define spaces for the passage of gas in the radial direction,
  • said annular wall comprises at least two, and preferably at least three, portions of different inner diameters, which are each able to cooperate with said annular seal,
  • the free annular edge comprises a first portion of inner diameter HI and the rest of the inner annular wall comprises another portion of inner diameter H3 which is less than HI,
  • the free annular edge comprises a second portion of inner diameter H2, between said first and other portions, where H2 is comprised between H3 and HI .
  • the invention also relates to a motor vehicle comprising at least a cap, a reservoir or an assembly as described hereinabove.
  • FIG. 1 is a schematic perspective view of a motor vehicle reservoir equipped with a cap according to the invention
  • FIG.2 is a schematic exploded perspective view of the reservoir and of the cap of FIG.1,
  • FIGS.3a to 3c are schematic perspective views of a ring of the cap of FIG.1,
  • FIG.4 is a schematic perspective view of the cover of the cap of FIG. l.
  • FIGS.5a to 5c are schematic partial perspective views of the reservoir of FIG. l.
  • FIG.6 is a schematic partial perspective view on a larger scale of a detail of the reservoir and of the cap of FIG.1,
  • FIGS.7a and 7b are schematic perspective views of a safety cell of the cap of FIG. l.
  • FIG.8 is a schematic partial view in cross section of the reservoir and of the cap of FIG.1, the cap being fixed to a neck of the reservoir,
  • FIGS.9 and 10 are schematic partial views, in perspective and in section respectively, of the reservoir and of the cap of FIG.1, the cap being premounted on the neck of the reservoir,
  • FIG.11 is a schematic perspective view of a motor vehicle
  • FIG.12 is a schematic partial view in section of the reservoir and of the cap of FIG.11,
  • FIG.13 is a schematic perspective view of the cover of the cap of FIG.11.
  • FIGS.14 and 15 are schematic perspective views of a ring of the cap of FIG.11,
  • FIG.16 is a schematic partial perspective view of the reservoir of FIG.11
  • FIG.17 is another schematic view in section and in perspective of the reservoir and of the cap of FIG.11,
  • FIG.18a is a schematic view in section of the reservoir and of the cap of FIG.21, on A-A, the cap being in a position in which it is premounted on the neck of the reservoir,
  • FIG.18b is a schematic partial view in section of the reservoir and of the cap of FIG.21, on B-B, the cap being in the premounted position,
  • FIGS.19a and 19b are schematic view similar to those of FIGS.18a and 18b and showing the cap in a position at the start of screwing onto the neck of the reservoir,
  • FIGS.20a and 20b are schematic views similar to those of
  • FIGS.18a and 18b showing the cap in a position at the end of screwing onto the neck of the reservoir
  • FIG.21 is a view from above of a reservoir and of a cap according to another alternative form of embodiment of the invention.
  • FIG.22 is a schematic perspective view in section of the neck of the reservoir of FIG.21
  • FIG.23 is a schematic view in section on a larger scale of the neck of the reservoir of FIG.21
  • FIG.24 is a schematic view in section of a safety cell of the cap of
  • FIG.21 and
  • FIG.25 is a schematic perspective view of a cover of the cap of
  • FIG.21 is a diagrammatic representation of FIG.21.
  • FIGS. l to 10 depict one embodiment of the cap 10 according to the invention, which is attached and fixed to a neck 12 of a fluid reservoir such as an expansion vessel of a motor vehicle.
  • the cap 10 essentially comprises three elements, namely a cover 16, a safety cell or valve 18, and a ring 20.
  • FIGS.3a to 3c show the ring 20 in isolation.
  • FIG.4 shows the cover 16 in isolation.
  • FIGS.5a to 5c show the reservoir 14 on its own, and
  • FIGS.7a and 7b show the safety cell 18.
  • the other figures 1, 6, 8, 9 and 10 show the cap 10 fixed or premounted on the neck 12 of the reservoir 14.
  • the ring 20 has an axis A of revolution. Overall, it comprises two axial end parts, these respectively being an upper end part 20a and a lower one 20b. Its upper part 20a has an outer diameter smaller than that of its lower part 20b.
  • the upper part 20a comprises a screw thread 22, in this instance an external screw thread, for screwing the cover 16 on.
  • the lower part 20b of cylindrical overall shape, is connected to the upper part 20a by an annular shoulder 24 defining an annular surface substantially perpendicular to the axis A.
  • the upper part 20a comprises a substantially cylindrical inner annular surface 20aa, of diameter Dl .
  • Ribs 26 projecting from the surface 20aa are uniformly distributed about the axis A.
  • the ribs 26 are substantially rectilinear and in this instance extend substantially parallel to the axis A.
  • the radially outer ends of the ribs 26 are situated at the level of the surface 20aa and therefore of the diameter Dl, and their free, radially inner ends are situated on a circumference centered on the axis A, of diameter D2 (naturally smaller than Dl).
  • the lower part 20b comprises an annular row of slots 28 passing through in the radial direction.
  • the slots 28 are uniformly distributed about the axis A. In this instance there are three of them. They each have a rectilinear overall shape and extend substantially in one and the same transverse plane, namely perpendicular to the axis A.
  • the lower part 20b comprises a sectorized inner annular rim 30 made up of sectors 30a, in this instance three of them, uniformly distributed about the axis A.
  • each slot 28 and each sector 30a extends about the axis A over an angle of approximately 20-40°.
  • the slots 28 are situated in the immediate vicinity of the sectors 30a and here extend just above them.
  • the slots are configured to give the sectors 30 a certain degree of flexibility and thus allow the sectors small amounts of elastic deformation, which are particularly useful in elastically snap-fastening the ring 20 onto the neck 12, as will be described in greater detail in what follows.
  • the sectors 30a bear elastic snap-fastening means which here take the form of ramps 32.
  • Each sector 30a bears, on its upper surface, which here is aligned with or coincident with a lower surface of the corresponding slot 28, a projecting ramp 32.
  • Each ramp 32 comprises an incline 32a oriented in the circumferential direction, and an end stop 32b oriented in the axial direction.
  • the inclines 32a are oriented according to the direction of the screw thread so that they can cooperate by sliding with the neck 12, until the ramps 32 elastically snap fasten into complementarily shaped recesses of the neck.
  • the end stops 32b can then, in this position, cooperate with the neck to prevent accidental removal of the ring from the neck of the reservoir.
  • the cover 16 of FIG.4 is intended to cover and close the neck 12 of the reservoir 14. It has an annular overall shape with an axis of revolution B which is intended to coincide with the axis A when the cap is being mounted on the neck. [0056] It comprises an upper wall 16a of circular and flat overall shape and the external periphery of which is connected to a substantially cylindrical wall 16b. This cylindrical wall 16b comprises an inner screw thread 16ba that complements the screw thread of the ring 20. The wall 16b additionally comprises an outer surface 16bb configured to make it easier for a user to grasp for the purposes of screwing/unscrewing the cover.
  • the cylindrical wall 16b comprises, on its lower free annular edge, a notch 34 oriented substantially in a radial direction.
  • This notch forms elastic snap-fastening means which are intended to cooperate with a stud 36 of complementary shape visible in FIG.3a.
  • This stud 36 projects from the transverse surface 24 of the shoulder.
  • FIG.8 which illustrates the position in which the cover 16 is screwed onto the ring 20
  • the free lower edge of the cover may be spaced by an axial clearance away from the transverse surface 24 of the shoulder (even through the stud 36 is engaged in the notch 34) and the outer periphery of the wall 16a of the cover 16 may bear axially against the upper edge of the ring.
  • the outer periphery of the wall 16a comprises an inner annular groove 38 for housing the outer periphery of a split ring 40, which is also visible in FIGS.2, 7a and 7b.
  • the inner periphery of this split ring 40 is engaged in an outer annular groove of the safety cell 18, which is therefore fixed to the cover 16 by the split ring 40.
  • the neck 12 of the reservoir 14 defines an opening 42, in this instance circular, for filling the reservoir and for emptying fluid from the reservoir.
  • the neck 12 comprises a cylindrical wall 44 defining the opening 42 and has an axis of revolution C which is intended to coincide with the axes A and B in the position in which the cap is mounted on the neck.
  • the cylindrical wall 44 and, in particular, the outer annular surface 44a thereof, has an external diameter D3 which is equal to or slightly smaller than the diameter D2.
  • the wall 44 at its upper end has a free annular edge 46 which is crenellated and exhibits an alternation of solid parts 46a and of recessed parts 46b, evenly distributed about the axis C.
  • the recessed parts 46b define spaces for the passage of gas in the radial direction.
  • the edge 46 may comprise radial through-orifices.
  • the wall 44 at its lower end comprises a radial additional thickness 48 which defines around the wall 44 an annular shoulder having a transverse upper annular surface 48a.
  • a sectorized outer annular rim 50 is situated at the outer periphery of the additional thickness 48 and comprises sectors 50a that complement the sectors 30a of the ring 20 so as to create means of fastening by bayonet effect.
  • each sector 50a is uniformly distributed about the axis C. They have substantially the same circumferential spread. In the example depicted, each sector 50a extends about the axis A over an angle of approximately 80-100°.
  • the sectors 50a bear means of elastic snap-fastening that complement the ramps 32.
  • they take the form of recesses 52 of a shape that complements that of the ramps 32.
  • Each sector 50a on its lower surface bears a recess 52.
  • Each recess 52 comprises an incline 52a oriented in the circumferential direction, and an end stop 52b oriented in the axial direction.
  • the inclines 52a are oriented according to the direction of the
  • the reservoir 14 is equipped with a gas duct 54 which may be formed as one piece with this reservoir 14.
  • the duct 54 here has a rectilinear overall orientation and runs substantially parallel to the axis C. It preferably extends over the entire height of the reservoir and opens at its upper end onto the surface 48a of the shoulder and thus forms an orifice 56, and at its lower end into the bottom of the reservoir (not depicted).
  • the passage cross section of the duct in this instance is shaped as an arc of a circle about the axis C. That allows the orifice 56, situated at the immediate periphery of the cylindrical wall 44, to hug the shape of this wall.
  • the orifice 56 thus comprises an inner annular edge situated on a circumference of diameter D3, and additionally comprises an outer annular edge situated on a circumference of diameter D4, this diameter D4 preferably being substantially equal to the diameter Dl, as can be seen in FIG.8.
  • FIG.8 reveals that the ring 16 defines, around the neck, an annular space 58 which is sectorized because of the presence of the ribs 26.
  • the ribs 26 can cooperate by sliding at the time of mounting with the wall 44 and bearing radially on this wall, in order to maintain a radial clearance between the ring 16 and the neck 12 and thus define this space 58.
  • This space 58 is aligned with and in fluidic communication with the orifice 56 and the duct 54.
  • the spaces 60 defined by the recessed parts 46b of the neck are also in fluidic communication with the space 58. This is rendered possible for example by dimensioning the height or axial dimension of the recessed parts 46b so that they communicate with the space 58.
  • the reservoir 14 may comprise an orifice 62 formed in the additional thickness 48 and intended to provide fluidic communication between the space 58 (or part of the duct 56 formed in the additional thickness 48) and the outside of the reservoir 14.
  • This orifice 62 is indicated schematically in dotted line in FIG.8. It opens laterally under the rim 50.
  • FIGS.7a, 7b and 8 illustrate one example of a safety cell 18 which is a nonlimiting example.
  • This cell 18 comprises a hollow body 64 having an axis D of revolution likewise intended to coincide with the axes A, B and C in the mounted position.
  • a first valve shutter 66 formed by an annulus is mounted in the body 64 and extends about the axis D.
  • a first helical compression spring 68 is mounted around the axis D and bears at its upper end against an upper wall of the body and at its lower end against the valve shutter 66.
  • a second valve shutter 70 is mounted in the body 64 and is centered on the axis D.
  • a second helical compression spring 72 is mounted around the axis D and at its lower end bears against the lower wall of the body and at its upper end bears against the valve shutter 70.
  • the valve shutter 66 surrounds the valve shutter 70 and bears axially upon the latter.
  • An annular seal in this instance an O-ring seal, 74, surrounds the body 64 of the cell 18 and is mounted in an outer annular groove of the body 64.
  • This seal 74 is elastically deformable. In the unstressed free position its external diameter is greater than the external diameter of the body of the cell or of the portion of the body of the cell that is intended to be engaged in the neck 12 of the container.
  • the outside diameter of the seal 74 is also greater than the inside diameter of the wall 44 of the neck. This is advantageous for allowing the cap to be premounted on the neck of the reservoir, as can be seen in FIGS.9 and 10.
  • the assembly formed by the reservoir 14 and the cap 10 can be delivered to a motor manufacturer in this premounted position in which the cap is simply engaged by axial translation in the neck 12, until its seal 74 is bearing radially against the internal surface of the wall 44. Mere direct cooperation between the seal 74 and this wall 44 is enough to hold the cap in this position. All that an operator needs then to do is to remove the cap, simply by withdrawing it axially, in order to proceed with filling the reservoir. In the premounted position, the sectors 32a of the ring can be aligned axially with the circumferential spaces extending between the sectors 52a of the neck 12 (FIG.9).
  • the sectors 32a of the ring need to be axially aligned with the circumferential spaces extending between the sectors 52a of the neck 12, the ring needs to be moved translationally until the sectors 32a pass through these circumferential spaces and become positioned underneath them, then the ring needs to be rotated about the axes A-D until the sectors 32a are situated underneath the sectors 52a and until the ramps 32 are housed by elastic snap-fastening in the recesses 52. As the ring is turned, the ramps 32 cooperate by sliding with the sectors 52a, and this may lead to elastic deformation of the sectors 32a.
  • the entire cap can be attached and fixed at the same time.
  • the ring 20 equipped with the cover 16 and with the cell 18 can be moved and fitted by an operator, as mentioned in the foregoing.
  • the cap in this exemplary embodiment affords a solution to a number of disadvantages of the earlier technology: the cap is mounted on the reservoir by bayonet-fastening as far as a locking point; thereafter, the cover can be unscrewed from the ring in order to fill the reservoir;
  • the cap can be fixed temporarily to the reservoir to simplify assembly; it is premounted on the neck (not locked), additionally affording the reservoir protection against potential contamination and knocks on the sealing zones;
  • the ring once mounted on the reservoir, defines a space on the outside of the neck, which communicates via the crenellations or holes with the inside of the neck above the cap seal; this space then communicates with at least one orifice or a duct of the reservoir in order to allow the gases to be ducted out of the reservoir, toward the bottom or toward the side of the reservoir; it is the saving made on the manufacturer's assembly lines that makes this solution competitive because it could now be performed by assembly on the reservoir prior to delivery.
  • FIGS.11 to 17 depict an alternative form of embodiment of the cap 110 according to the invention, which is attached and fixed to a neck 112 of a fluid reservoir 114 such as a motor vehicle expansion vessel.
  • the cap 110 essentially comprises three elements, namely a cover 116, a safety cell or valve 118 and a ring 120.
  • FIGS.14 and 15 show the ring 120 in isolation.
  • FIG.13 shows the cover 116 in isolation.
  • FIG.16 shows the reservoir 114 on its own.
  • the other figures show the cap 110 fixed to the neck 112 of the reservoir 114, FIGS.12 and 17 showing the safety cell 118.
  • the ring 120 has an axis A of revolution. It comprises a screw thread 122, in this instance an external screw thread, for screwing on the cover 116. It comprises a
  • Ribs 126 projecting from the surface 120aa are uniformly distributed about the axis A.
  • the ribs 126 are substantially rectilinear and in this instance extend substantially parallel to the axis A.
  • the radially outer ends of the ribs 126 are situated at the surface 120aa and therefore at the diameter Dl, and their radially inner ends are joined together by ring sectors 127 and situated on a circumference centered on the axis A, of diameter D2 (which is naturally smaller than Dl).
  • Means of guidance and sliding and elastic snap-fastening are also arranged on the surface 120aa.
  • the guidance and sliding means comprise slideways 128 in this instance projecting from the surface 120aa. There are four of these slideways 128 uniformly distributed about the axis A.
  • the slideways 128 are of two types, a first type of slideway 128a comprising a single radial wall and a second type of slideway 128b comprising two radial walls spaced circumferentially apart by a predetermined distance.
  • the slideways 128a are diametrically opposed, as too are the slideways 128b.
  • the slideways 128a and their walls run parallel to the axis A. They have their upper ends situated at the level of the upper end of the surface 120aa of the ring, and their lower ends bearing elastic snap-fastening means. These elastic snap-fastening means in this instance are catching teeth 129.
  • the slideways 128b and their walls run parallel to the axis A. They have their upper ends situated at the level of the upper end of the surface 120aa of the ring, and their lower ends connected to ring sectors 127 in the example depicted.
  • the slideways 128 define a longitudinal housing 131 parallel to the axis A and extending over the entire height or axial dimension of the ring 120.
  • the cover 116 of FIG.13 is intended to cover and closed the neck 112 of the reservoir 114. It has an annular overall shape and has an axis of revolution B which is intended to coincide with the axis A when the cap is mounted on the neck.
  • It comprises an upper wall 116a of flat and circular overall shape and the external periphery of which is connected to a substantially cylindrical wall 116b.
  • This cylindrical wall 116b comprises an internal screw thread 116ba that complements the screw thread of the ring 120.
  • the wall 116b further comprises an outer surface 116bb configured to make it easier for a user to grasp, so that the cover can be screwed on/unscrewed.
  • FIGS.11, 12 and 17 which illustrate the position in which the cover 116 is screwed onto the ring 120, the free lower edge of the cover may bear axially against the upper surface 148a of the shoulder of the neck.
  • the outer periphery of the wall 116a comprises an inner annular groove 138 for housing the outer periphery of a split ring 140.
  • the inner periphery of this split ring 140 is engaged in an outer annular groove of the safety cell 118, which is therefore fixed to the cover 116 via the split ring 140.
  • the neck 112 of the reservoir 114 defines an opening 142, in this instance circular, for filling the reservoir and for removing fluid from the reservoir.
  • the neck 112 comprises a cylindrical wall 144 defining the opening 142 and has an axis of revolution C, which is intended to coincide with the axes A and B when the cap is in the position mounted on the neck.
  • the cylindrical wall 144 and, in particular, the outer annular surface 144a thereof has an outside diameter D3 which is equal to or slightly smaller than the diameter D2.
  • the wall 144 at its upper end has a free annular edge 146 which is crenellated and exhibits an alternation of solid parts 146a and of recessed parts 146b uniformly distributed about the axis C.
  • the recessed parts 146b define spaces for the passage of gas in the radial direction.
  • this edge could comprise radial through-orifices.
  • the wall 144 at its lower end comprises a radial additional thickness 148 which defines around the wall 144 an annular shoulder exhibiting a transverse upper annular surface 148a.
  • the neck 112 comprises means of guidance and sliding and elastic snap-fastening on the wall 144.
  • the guiding and sliding means comprise rails 149, in this instance projecting from the outer surface of the wall 144.
  • rails 149 uniformly distributed about the axis C. They are intended to cooperate with the slideways 128.
  • Each rail comprises a single radial wall.
  • the rails 149 and their walls run parallel to the axis C. In the example depicted, they are situated so they project from the solid parts 146a. They have their upper ends situated at the level of the upper ends of the solid parts 146a and their lower ends situated at the level of the shoulder of the neck. [0092] Two of the rails, which are diametrically opposed, each comprise an elastic snap- fastening notch 150 intended to collaborate with one of the catching teeth 129.
  • the reservoir 114 is equipped with a gas duct 154 which may be formed as one piece with this reservoir 114.
  • the duct 154 here has a rectilinear overall orientation and runs substantially parallel to the axis C. It preferably extends over the entire height of the reservoir and opens at its upper end onto the surface 148a of the shoulder and thus forms an orifice 156, and at its lower end into the bottom of the reservoir (not depicted).
  • the passage cross section of the duct here is an arc of a circle about the axis C. That allows the orifice 156 situated at the immediate periphery of the cylindrical wall 144 to conform to the shape of this wall.
  • the orifice 156 thus comprises an inner annular edge situated on the circumference of diameter D3 and also comprises an outer annular edge situated on a circumference of diameter D4, this diameter D4 preferably being substantially equal to the diameter Dl .
  • the ring 116 defines around the neck an annular space 158 which is sectorized by the presence of the ribs 126, of the rails 149 and of the slideways 128.
  • the sectors 127 may cooperate by sliding during mounting with the wall 144 and by bearing radially on this wall, in order to maintain a radial clearance between the ring 116 and the neck 112 and thus define this space 158.
  • the rails 149 also cooperate by engagement and axial sliding with the housings 131.
  • the space 158 is aligned and in fluidic communication with the orifice 156 and the duct 154.
  • the spaces 160 defined by the recessed parts 146b of the neck are also in fluidic communication with the space 158. This for example is rendered possible by dimensioning the height or axial dimension of the recessed parts 146b in such a way that they communicate with the space 158 (FIG.17).
  • the safety cell 118 may be similar to the one 18 described in the foregoing.
  • the assembly formed by the reservoir 114 and the cap 110 can be delivered to a motor manufacturer in a premounted position as mentioned hereinabove.
  • the rails 149 need to be axially aligned with the longitudinal housings 131 of the ring 120 and the ring needs to be moved translationally until the teeth 129 of the slideways 128a elastically snap-fasten to the notches 150 of the rails 149.
  • the entire cap can be attached and fixed at the same time.
  • the ring 120 equipped with the cover 116 and with the cell 118 can be moved and fixed by an operator as mentioned in the foregoing.
  • FIGS.18a to 25 illustrate another alternative form of embodiment of the invention, illustrating in greater detail the ability to premount the cap on the neck of the reservoir.
  • the ring 220 bearing the external screw thread 222 is formed as a single piece with the neck 112.
  • the neck 112 is of the double- skinned or double-walled type and comprises two coaxial annular walls, these respectively being an inner and an outer wall.
  • the outer wall is formed by the ring 220 and is substantially cylindrical.
  • the inner wall 144 at its upper end comprises the crenellated annular edge 146 described in the foregoing.
  • the annular wall 144 comprises at least two, and preferably at least three, portions of different internal diameters, each of which are able to cooperate with the annular seal 174 of the safety cell 118.
  • the free annular edge 146 comprises a first portion 146aa, in this instance an upper portion, of internal diameter HI, and a second portion 146ab, in this instance an intermediate portion, of internal diameter H2 smaller than HI .
  • the rest of the wall 144 comprises a third portion 146ac, in this instance a lower portion, of internal diameter H3 which is smaller than HI and H2.
  • FIG.16 illustrates an alternative form having two portions with different internal diameters as opposed to three in the example of FIGS.18a et seq.
  • the annular seal 174 of the safety cell is configured to cooperate by simply bearing with elastic deformation on the annular wall 144 in order to provide a stable transport position in which the cap is premounted on the neck and the screw threads 116ba, 222 are not yet cooperating with one another, as is visible in FIGS.18a and 18b.
  • the seal 174 is elastically deformed by bearing radially on the portion 146aa or 146ab of the wall 144.
  • the screw threads may bear axially against one another in this position, as can be seen in the zone U of FIG.18a.
  • FIGS.19a and 19b depict an intermediate screwing step in which the seal 174 is bearing radially against the portion 146ab or the ramp R2 connecting this portion to the portion 146ac.
  • the assembly formed by the reservoir 114 and the cap 110 can be delivered to a motor manufacturer in the premounted position of FIGS.18a and 18b. All an operator then has to do is to remove the cap by axial translation in order to proceed to fill the tank via its neck. The cap can then be screwed and tightened onto the neck.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Closures For Containers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

L'invention concerne un bouchon cache-prise (10) pour un réservoir de fluide de véhicule motorisé (14), le bouchon étant configuré pour être attaché et fixé à un col (12) du réservoir. Le bouchon comprend un couvercle de vissage (16) avec un premier filetage de vis (16ba), et une cellule de sécurité (18) configurée pour permettre le passage de gaz de l'intérieur vers l'extérieur du réservoir, et/ou inversement, lorsque le bouchon est fixé au col et lorsqu'une différence de pression entre l'intérieur et l'extérieur du réservoir est supérieure ou inférieure à au moins une valeur seuil prédéterminée. Le bouchon comprend un anneau (20) ayant une structure (30, 30a, 32) pour une fixation au col et un second filetage de vis (22) pour coopérer avec le premier filetage de vis, la cellule étant au moins partiellement logée dans le col et entourée par le couvercle et/ou l'anneau lorsque le bouchon est fixé sur le col.
PCT/US2018/015650 2017-05-16 2018-01-29 Bouchon cache-prise pour réservoir de liquide de véhicule motorisé WO2018212806A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP20166959.5A EP3699411A3 (fr) 2017-05-16 2018-01-29 Capuchon de sécurité pour un réservoir de liquide pour un véhicule à moteur
US16/613,628 US20200208564A1 (en) 2017-05-16 2018-01-29 Safety cap for a liquid reservoir for a motor vehicle
EP18703466.5A EP3625444A1 (fr) 2017-05-16 2018-01-29 Bouchon cache-prise pour réservoir de liquide de véhicule motorisé

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1754296A FR3066545A1 (fr) 2017-05-16 2017-05-16 Bouchon de securite d'un reservoir de liquide pour un vehicule automobile
FR1754296 2017-05-16

Publications (1)

Publication Number Publication Date
WO2018212806A1 true WO2018212806A1 (fr) 2018-11-22

Family

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PCT/US2018/015650 WO2018212806A1 (fr) 2017-05-16 2018-01-29 Bouchon cache-prise pour réservoir de liquide de véhicule motorisé

Country Status (4)

Country Link
US (1) US20200208564A1 (fr)
EP (2) EP3699411A3 (fr)
FR (1) FR3066545A1 (fr)
WO (1) WO2018212806A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022054599A (ja) * 2020-09-28 2022-04-07 いすゞ自動車株式会社 車載タンクのキャップ

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR622813A (fr) * 1926-10-07 1927-06-08 Dispositif de fixation de bouchon de radiateur ou autre organe similaire
FR2221962A5 (fr) * 1973-03-14 1974-10-11 Journee Paul
FR2431975A2 (fr) * 1978-07-28 1980-02-22 Neiman Diffusion Bague de transformation pour embouchures de reservoirs a collerettes externes
FR2646405A1 (fr) 1989-04-28 1990-11-02 Bailly Comte Ets Bouchon de securite pour circuit sous pression
WO2003056154A1 (fr) * 2001-12-22 2003-07-10 Heinrich Reutter Bouchon de radiateur de vehicule automobile
US20080179325A1 (en) * 2007-01-29 2008-07-31 John Clarke Internally Threaded Cap
WO2015170337A2 (fr) * 2014-05-05 2015-11-12 Sundram Fasteners Limited Capuchon d'étanchéité à libération de pression

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR622813A (fr) * 1926-10-07 1927-06-08 Dispositif de fixation de bouchon de radiateur ou autre organe similaire
FR2221962A5 (fr) * 1973-03-14 1974-10-11 Journee Paul
FR2431975A2 (fr) * 1978-07-28 1980-02-22 Neiman Diffusion Bague de transformation pour embouchures de reservoirs a collerettes externes
FR2646405A1 (fr) 1989-04-28 1990-11-02 Bailly Comte Ets Bouchon de securite pour circuit sous pression
WO2003056154A1 (fr) * 2001-12-22 2003-07-10 Heinrich Reutter Bouchon de radiateur de vehicule automobile
US20080179325A1 (en) * 2007-01-29 2008-07-31 John Clarke Internally Threaded Cap
WO2015170337A2 (fr) * 2014-05-05 2015-11-12 Sundram Fasteners Limited Capuchon d'étanchéité à libération de pression

Also Published As

Publication number Publication date
FR3066545A1 (fr) 2018-11-23
US20200208564A1 (en) 2020-07-02
EP3699411A2 (fr) 2020-08-26
EP3699411A3 (fr) 2020-11-04
EP3625444A1 (fr) 2020-03-25

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