EP1461268A1 - Cartouche de distribution avec circuit d'aeration sinueux - Google Patents

Cartouche de distribution avec circuit d'aeration sinueux

Info

Publication number
EP1461268A1
EP1461268A1 EP02786916A EP02786916A EP1461268A1 EP 1461268 A1 EP1461268 A1 EP 1461268A1 EP 02786916 A EP02786916 A EP 02786916A EP 02786916 A EP02786916 A EP 02786916A EP 1461268 A1 EP1461268 A1 EP 1461268A1
Authority
EP
European Patent Office
Prior art keywords
piston
fluid
recited
dispensing
annular
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP02786916A
Other languages
German (de)
English (en)
Other versions
EP1461268A4 (fr
Inventor
Robert Charles Brennan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tah Industries Inc
Original Assignee
Tah Industries 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 Tah Industries Inc filed Critical Tah Industries Inc
Publication of EP1461268A1 publication Critical patent/EP1461268A1/fr
Publication of EP1461268A4 publication Critical patent/EP1461268A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00576—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container
    • B05C17/00579—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes characterised by the construction of a piston as pressure exerting means, or of the co-operating container comprising means for allowing entrapped air to escape to the atmosphere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/0005—Containers or packages provided with a piston or with a movable bottom or partition having approximately the same section as the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2205/00—Venting means
    • B65D2205/04—Venting means for venting during the initial insertion of a piston

Definitions

  • the present invention relates to a dispensing cartridge for relatively precise dispensing of various fluids having a relatively wide range of viscosities, the cartridge including a cylinder, a piston with a central bore and a bleed plug, the central bore and bleed plug configured to provide a tortuous path to prevent backflow of the fluid under normal operating conditions, thereby eliminating the need for an overflow chamber.
  • the piston is further configured with one or more annular sealing lips for sealing the piston within the cylinder, thereby eliminating the need for an O-ring forming a single seal configuration.
  • the piston may be configured with one or more sealing lips and an O-ring forming a multiple seal configuration.
  • Dispensing cartridges for relatively precise dispensing of fluids are known in the art. Examples of such dispensing cartridges are disclosed in U.S. Patent Nos. 4,951,848; 5,178,305 and 5,400,926.
  • Such dispensing cartridges are known to include a cylinder with a nozzle, a piston, sealed within the cylinder by way of an O-ring, and a plug.
  • the piston is configured with an axial air vent in order to bleed air as the piston is moved toward the fluid surface.
  • the plug closes the axial air vent once the piston contacts the fluid surface in order to prevent leakage of the fluid through the axial air vent.
  • the fluid contacting surface of the piston is configured with a concave profile with a number of radially extending slots or channels in communication with the axial air vent, for example, as disclosed in U.S. Patent No. 4,951,848.
  • trapped air is channeled by way of the radial slots to the axial air vent to release any trapped air.
  • the plug is used to close the axial air vent to prevent leakage of the fluid to provide relatively precise dispensing of the fluid as the piston is moved downward further in the dispensing cylinder.
  • U.S. Patent No. 5,178,305 discloses a dispensing cartridge in which the piston is provided with an annular overflow chamber in fluid communication with the axial air vent. As such, as the piston is moved toward the fluid surface, any fluid backflowing through the axial air vent is captured in the annular overflow chamber.
  • the axial air vent allows relatively free flow of the fluid therethrough as the piston is displaced downwardly.
  • the overflow chamber and the plug are configured such that the annular overflow chamber is closed by the plug along with the axial air vent.
  • U.S. Patent No. 5,400,926 discloses the use of one or more annular sealing lips, integrally formed on the outside surface of the piston.
  • One of the sealing lips is configured to create an annular chamber between the O-ring and sealing lip for collecting fluids as the piston is moved downward to prevent migration of the fluid (particularly low viscosity fluids) from coming into contact with the O-ring.
  • one of the sealing lips is formed with an annular shoulder or base portion having a relatively larger diameter than the other sealing lip.
  • Such a configuration further complicates the design of the dispensing cartridge making it relatively more difficult to manufacture.
  • there is a need for a dispensing cartridge that is relatively less complicated than known dispensing cartridges and also addresses the issues discussed above regarding preventing chemical attack of the O-ring and preventing leakage of the fluid after the piston is in contact with the fluid in the dispensing cylinder.
  • the present invention relates to a dispensing cartridge for relatively precise dispensing of various fluids having a relatively wide range of viscosities.
  • the dispensing cartridge in accordance with the present invention is relatively simpler in configuration than known dispensing cartridges while minimizing leakage of the fluid and eliminating problems associated with chemical attack of the O-ring by the fluid in the dispensing cylinder.
  • the dispensing cartridge in accordance with the present invention includes a cylinder, a piston with a central bore and a bleed plug.
  • the combination of the air vent and bleed plug are configured to form a tortuous path, for example, a spiral path, which, in a pre-staged position, allows air to freely escape along the spiral path along the circumference of the plug.
  • a tortuous path for example, a spiral path
  • the forward motion of piston is resisted by the high back pressure created by the small effective diameter and relatively long length of the spiral path.
  • the bleed plug is pushed into the piston closing the spiral path.
  • the piston may be provided with one or more radially extending sealing lips. These sealing lips are used in lieu of or in conjunction with an O-ring. The sealing lips further simplify the design by eliminating the O-ring as well as the need for an annular chamber adjacent thereto as well as problems relating to chemical attack of the O-ring by the fluid within the dispensing cylinder.
  • the piston is provided with a single sealing lip and an O-ring.
  • FIG. 1 is a sectional view of the dispensing cartridge in accordance with the present invention, shown carrying a fluid with an irregular surface profile and with the piston spaced away from the fluid surface.
  • FIG. 2 is similar to FIG. 1, but shown with the piston in contact with the fluid surface and the plug in a pre-staging position.
  • FIG. 3 is similar to FIG. 2, but shown with the plug in a closed position.
  • FIG. 4 is a partially exploded view illustrating the plug in a pre-staging position.
  • FIG. 5 is a sectional view of an alternative embodiment of the piston for use with the present invention, shown with the bleed plug in an open or pre-staging position.
  • FIG. 6 is similar to FIG. 5, but shown with the bleed plug in a closed position.
  • FIG. 7 is a perspective view of the piston illustrated in FIG. 5.
  • FIG. 8 is similar to FIG. 7, but shown with the bleed plug in a closed position.
  • FIG. 9 is a bottom view of the piston illustrated in FIGS. 5-8.
  • FIG. 10 is a perspective view of an alternate embodiment of a single lip multiple seal piston for use with the present invention.
  • FIG. 11 is a bottom plan view of the piston illustrated in FIG. 10.
  • FIG. 12 is a top plan view of the piston illustrated in FIG. 10.
  • FIG. 13 is a sectional view of the piston along line 13-13 of FIG. 12.
  • FIG. 14 is a sectional view of the piston along line 14-14 of FIG. 12.
  • FIG. 15 is a perspective view of an alternate embodiment of a single seal multiple lip piston in accordance with the present invention.
  • FIG. 16 is a bottom plan view of the piston illustrated in FIG. 15
  • FIG. 17 is a top plan view of the piston illustrated in FIG. 15.
  • FIG. 18 is a sectional view of the piston along line 18-18 of FIG. 17.
  • FIG. 19 is a sectional view of the piston along line 19-19 of FIG. 17.
  • the present invention relates to a dispensing cartridge for relatively precise dispensing of fluids, for example, high viscosity fluids, such as caulking compounds.
  • the dispensing cartridge includes a cylinder, a piston and a bleed plug.
  • an air vent is provided in the piston and a bleed plug together form a tortuous path, for example, a spiral path, which allows air to freely escape but requires relatively high pressure (i.e. higher than normal operating pressure) in order for the fluid to backflow through the path, thus eliminating the need for an overflow chamber.
  • the piston is provided with the one or more sealing lips in lieu of an O-ring in order to further simplify the design, as well as totally eliminate known problems related to sealing the piston within the dispensing cartridge.
  • the piston is configured with a single sealing lip and includes an O-ring particularly adapted for use with non- aggressive fluids.
  • FIGS. 10-14 illustrate an alternate embodiment of the piston for use with the present invention configured with a single lip and an O-ring which forms a multiple seal.
  • FIGS. 15-19 illustrate another embodiment of the piston for use with the present invention configured with a single seal formed from multiple lips.
  • the dispensing cartridge generally identified with the reference numeral 20, includes a dispensing cylinder 22, a piston 24 and bleed plug 26.
  • the dispensing cylinder 22 includes a bottom surface and a nozzle (not shown) for dispensing the fluid under the influence of the piston 24.
  • the dispensing cartridge 20 may be utilized with fluids with a relatively wide range of viscosities, collectively referred to with the reference numeral 28.
  • the dispensing cylinder 22 is filled with a fluid 28 having a relatively high viscosity, such as a caulking compound, which results in an irregular static fluid surface profile 30.
  • the fluid surface profile 30 will be generally flat.
  • the dispensing cartridge 20 in accordance with the present invention is configured to be used with fluids with a generally flat surface profile as well as irregular surface profiles, as generally illustrated in FIG. 1.
  • the piston 24 and bleed plug 26 are configured to provide a controlled evacuation of the air in the ullage space 32, while at the same time preventing backflow of the fluid 28 through the piston 24.
  • the piston 24 is formed as a cylindrical member, formed from a dimensionally stable and chemically inert material, such as a thermoplastic or thermoset material.
  • the piston 24 is formed with a central bore 34 that is closed by the bleed plug 26.
  • the bleed plug 26 and the central bore 34 are configured to provide a tortuous vent path.
  • the bleed plug 26 may be formed with an exemplary threaded stud portion 36 that defines a spiral path.
  • the threaded stud portion 36 is adapted to be received in the central bore 34 of the piston 24.
  • the top portion 38 of the central bore 34 is formed with an increased inner diameter portion, defining an annular shoulder 40.
  • the central bore may be configured with a helical groove and the bleed plug formed with a cylindrical cross section.
  • a pre-staging position i.e. the position as shown in FIGS. 2 and 4
  • the configuration of the bleed plug 26 and the top portion 38 of the central bore 34 define a path to the atmosphere for air being vented through the tortuous path, generally indicated by the arrow 41.
  • a reduced diameter inlet 42 is provided on a bottom end 44 of the central bore 34. Accordingly, when the bleed plug 26 is in a pre-staging position as shown in FIGS. 2 and 4, a controlled or tortuous vent path is created between the inlet 42 and the spiral cavity, generally identified with the reference numeral 46, defined between the bleed plug 26 and the inner wall 48 of the central bore 34.
  • the bleed plug 26 may be formed with an annular angled rib portion 50.
  • the rib portion 50 is configured to seat against the annular shoulder 40, formed at the top of the central bore 34 and close the spiral air cavity 46.
  • the tortuous path 41 is closed.
  • the bottom portion 54 (FIG. 1) of the piston 24 may be formed in a generally convex shape with a plurality of radial slots or channels 56.
  • Each radial slot 56 is formed with a uniform depth to simplify the device.
  • the radial slots 56 are configured such that one end of each of the radial slots 56 is in fluid communication with inlet 42 of the central bore 34.
  • the opposing end 58 of each of the radial slots 56 is in fluid communication with an annular wedge-shaped slot 60.
  • one or more circular slots 62 may be provided on the bottom surface 54 of the dispensing piston 24.
  • annular sealing lips 64 and 66 are provided in order to seal the piston within the dispensing cylinder 22. These sealing lips 64 and 66 may be integrally formed with the dispensing piston 24 and configured to prevent migration of the fluid 28 past the upper sealing lip 64 in order to provide relatively precise dispensing of the fluid 28.
  • the sealing lips 64 and 66 are provided in lieu of an O-ring, thus eliminating problems associated with chemical attack of the O-ring by the fluid 28.
  • the sealing lips 64 and 66 face downwardly and define the wedge-shaped annular cavity 60 and another annular cavity 68.
  • the annular cavity 60 is in fluid communication with the radial channels 56, which, in turn, are in fluid communication with the inlet 42 of the central bore 34.
  • any air trapped in the annular wedge-shaped chamber 60 is directed through the radial channels 56 and to the inlet 42 of the central bore 34.
  • the dispensing cartridge 20 does not utilize an O-ring seal.
  • Annular cavities 52 and 72 may be formed in the piston 24.
  • the annular cavities 52 and 72 form annular ribs and are used, depending on the diameter of the piston 24, to increase its rigidity.
  • the dispensing cylinder 22 is filled with a fluid 28, for example, a relatively high viscosity fluid, such as a caulking compound, having an irregular surface profile 30, as generally shown in FIG. 1.
  • a fluid 28 for example, a relatively high viscosity fluid, such as a caulking compound, having an irregular surface profile 30, as generally shown in FIG. 1.
  • the bleed plug 26 is initially partially inserted or pre-staged in the central bore 34 of the piston 24 as shown in FIG. 4.
  • the dispensing piston 24 is then inserted into the dispensing cylinder 22.
  • the bleed plug 26 In an initial position as shown in FIGS. 1, 2 and 4, the bleed plug 26 is disposed within the central bore 34 to define the tortuous vent path 41, as shown best in FIG. 4.
  • the dispensing piston 24 is moved toward the fluid surface profile 30 (FIG. 1), air in the ullage space 32 is easily evacuated by way of the vent path 41.
  • FIGS. 5-8 illustrate an alternate embodiment of the invention particularly adapted for use with non-aggressive fluids.
  • a single sealing lip and an O-ring is used to seal the piston 100 within the dispensing cylinder 22.
  • the piston 100 is configured to receive the bleed plug 26 which provides a tortuous vent path in an open position, as illustrated in FIGS. 5 and 7.
  • the bleed plug 26 is in a closed position, as illustrated in FIGS. 6 and 8, the vent path is closed. Similar to the embodiment in FIGS. 1 and 4, the use of the tortuous vent path eliminates the need for an overflow chamber.
  • the piston 100 is formed as a cylindrical member, for example, from a dimensionally stable and chemically inert material, such as a thermoplastic or thermal set material.
  • the piston 100 includes a central bore 102 for receiving the bleed plug 26, as discussed above.
  • a single annular sealing lip 106 is formed adjacent one end of the piston 100.
  • the sealing lip 106 may be integrally formed with the piston 100, defining a wedge-shaped annular slot 108.
  • annular groove 110 is formed along the outer periphery of the piston 100.
  • the annular groove 110 is configured to receive an O-ring 112.
  • the O-ring 112 and sealing lip 106 seals the piston 100 within the dispensing cylinder 24.
  • a second annular groove 114 may be provided along the outer periphery of the piston 100, disposed between the annular groove 110 and the sealing lip 106.
  • the annular groove 114 is optional and may be used to catch any of the fluid that migrates past the sealing lip 106.
  • the piston 100 as well as the piston 24 is configured to be molded by conventional molding techniques, such as injection molding.
  • the interior portion of the piston 24 and 100 may be formed with various configurations.
  • the piston 100 may be formed with two concentric annular slots 116 and 118. These slots 116 and 118 may be formed with various axial lengths, as shown in FIGS. 5 and 6.
  • the outer slot 116 may be partitioned with a number of radial ribs 120.
  • the inner annular slot 118 may be continuous or partitioned by radial ribs (not shown) to provide additional rigidity of the piston 100, as shown.
  • the bottom surface 122 of the piston 100 may be formed as a flat surface as illustrated in FIG. 5 or 6, or optionally with a convex surface as illustrated in FIGS. 1-3.
  • the bottom surface 122 may be formed with one or more circular grooves 124 in fluid communication with various radial slots, generally identified with the reference numeral 126, which, in turn, are in fluid communication with the wedge-shape annular slot 108 and the central bore or vent 102.
  • the configuration of the bottom surface 122 facilitates evacuation of air from the ullage space between the bottom surface 122 of the piston 100 and the fluid surface.
  • FIGS. 10-14 illustrate another alternate embodiment of a piston, for use with present invention, generally identified with the reference numeral 150. Similar to the embodiment illustrated in FIGS. 5-8, the piston 150 illustrated in FIGS. 10-14 is for use with relatively low viscosity non-aggressive fluids. As will be discussed in more detail below, the piston 150 is configured with one or more lips and is further configured to receive an O-ring to form a multiple seal type device.
  • the piston 150 is configured to receive a bleed plug, similar to the bleed plug 26, shown, for example, in FIGS. 5 and 6. More particularly, as shown best in FIGS. 13 and 14, the piston 150 includes a vent path 152 for receiving a bleed plug and providing a tortuous vent path as discussed above.
  • the vent path 152 is cylindrical, in shape, open on a fluid contacting end 154 as well as an opposing end 156.
  • the top portion of the vent path is formed with an increased diameter portion 158.
  • a plurality of axial notches 160, 162, 164 and 166 are formed in the increased diameter portion 158 of the vent path 152.
  • the axial slots 160, 162, 164 and 166 as well as the increased diameter portion 158 facilitate placement of the bleed plug into the vent path 152.
  • FIGS. 5-8 Another difference between the piston 150 and the piston 100, illustrated in FIGS. 5-8 relates to the configuration of the outer peripheral surface 159 of the piston 150.
  • the piston 150 is formed with a one or more annular sealing lips 160.
  • the annular sealing lip 160 is formed at an acute angle 162 relative to the plane of the outer peripheral surface 159 of the piston 150. More particular, an angular flange 164 is spaced away from the non-fluid contacting end 154 of the piston 150.
  • the annular sealing lip 162 extends outwardly from an intermediate position on the annular flange 164 to the fluid contacting end 154 of the piston 150.
  • annular walls 166 and 168 are formed axially spaced apart from each other and spaced away from the annular flange 164.
  • the annular walls 166 and 168 extend radially outwardly from the outer peripheral surface 159 of the piston 150 to a distance substantially aligned in a radial direction with the furthest extending point 170 of the lower annular lip 160.
  • the extending annular walls 166 and 168 define two annular cavities 172 and 174 when the piston is disposed within a cylinder, for example, as shown in FIGS. 1-3.
  • the radius of the annular flange 164 is less than the radius of the annular wall 166 as well as the radius of the furthest extending point 170 of the lower annular lip 160. With such a configuration, any portion of the fluid which migrates past the annular lip 162 will be trapped in the annular space 172.
  • An annular shoulder 178 along the peripheral surface 159 is formed at a position spaced away from the non-fluid contacting end 156 of the piston 150.
  • An annular cavity 179 is formed between the annular shoulder 178 and the annular wall 168.
  • the annular cavity 179 is for receiving an O-ring, like the O-ring 112 (FIGS. 5 and 6) forming a multiple seal piston (i.e. lip plus O-ring).
  • the annular cavity 174 provides extra protection for the O-ring by providing a second annular cavity between the lower annular lip 160 on the fluid contacting end 154 of the piston 150 and the O-ring within the annular cavity 179. With such a configuration, any fluid which migrates past the lower annular lip 160 is trapped in the annular cavity 172. Should the annular cavity 172 fill up and/or any fluid migrate past the annular wall 166, it will be caught in the annular cavity 174, thus providing increased protection against fluid contacting the O-ring.
  • An alignment lip 180 is formed on the non-fluid contacting end 156 of the piston 150.
  • the alignment lip 180 extends from a base portion 182 of annular flange 178 to a point 184 having the same radius as the radius of the point 170 of the lower lip 170.
  • the upper lip 180 is angled in a direction opposite to that of the lower lip 160 as shown, for example, in FIG. 12.
  • the alignment lip 180 provides for axial alignment of the piston 150 within the cylinder.
  • FIGS. 15-19 illustrates another embodiment of a piston for use with the present invention, generally identified with the reference numeral 200.
  • the piston 200 is configured for use with relatively aggressive fluids and utilizes multiple sealing lips and does not incorporate an O-ring for sealing the piston 200 in the cylinder.
  • the vent cavity 202 is formed in a similar manner as the vent cavity 158 (FIG. 11) of the piston 150. As such this aspect will not be discussed further.
  • the piston 200 incorporates multiple sealing lips 204 and 206 (FIGS. 15, 18 and 19).
  • the sealing lip 204 is disposed adjacent a fluid contacting end 208 (FIG. 19) of the piston 200.
  • An annular flange 210 is formed at an axial position spaced away from the fluid contacting end 208 of the piston 200.
  • the sealing lip 204 extends outwardly from an intermediate position along the annular flange 210.
  • the second sealing lip 206 is formed as an annular wall at an axial position spaced away from the annular flange 210 forming an annular cavity 214 therebetween when the piston 200 is displaced within a cylinder.
  • the annular cavity 214 is used to catch fluid that migrate past the sealing lip 204.
  • An annular angled wall 214 is formed adjacent the non-fluid contacting end 210 of the piston 200.
  • the angled wall 214 provides axial stability of the piston 200 within a cylinder.
  • the fluid contacting end 208 of the piston 200 is formed in a concave shape.
  • the concave shape is best shown in FIGS. 15, 18 and 19.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

La présente invention concerne une cartouche de distribution (20) de conception relativement simple, permettant de réduire au minimum les fuites de liquide (28) et d'éliminer les problèmes liés à une attaque chimique du joint torique (112) par le liquide contenu dans le cylindre de distribution (22). L'évent (41) est conçu sous forme de circuit sinueux qui, dans une position pré-étagée, permet à l'air de s'échapper librement le long du circuit hélicoïdal situé le long de la circonférence de l'obturateur (26). Lorsque le piston (24) entre en contact avec le liquide (28), le mouvement vers l'avant du piston (24) est retenu par une contre-pression élevée créée par le diamètre effectif réduit et la longueur relativement importante du circuit hélicoïdal. Lorsque le piston (24) entre en contact avec le liquide (28), l'obturateur (26) est poussé dans le piston (24), ce qui ferme le circuit hélicoïdal. La régulation du débit du liquide permet de réduire au minimum ou d'éliminer le retour de liquide dans le piston (24) et ainsi d'éviter l'utilisation d'une chambre de trop-plein annulaire. Pour augmenter l'étanchéité du piston (24) à l'intérieur de la cartouche de distribution (20), il suffit d'équiper le piston (24) d'une ou de plusieurs lèvres d'étanchéité (64, 66) qui s'étendent de façon radiale, pouvant être utilisées à la place d'un joint torique (112) ou conjointement avec le joint torique (112).
EP02786916A 2001-12-10 2002-12-06 Cartouche de distribution avec circuit d'aeration sinueux Withdrawn EP1461268A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US33893501P 2001-12-10 2001-12-10
US338935P 2001-12-10
US34808802P 2002-01-11 2002-01-11
US348088P 2002-01-11
PCT/US2002/039041 WO2003050012A1 (fr) 2001-12-10 2002-12-06 Cartouche de distribution avec circuit d'aeration sinueux

Publications (2)

Publication Number Publication Date
EP1461268A1 true EP1461268A1 (fr) 2004-09-29
EP1461268A4 EP1461268A4 (fr) 2009-03-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP02786916A Withdrawn EP1461268A4 (fr) 2001-12-10 2002-12-06 Cartouche de distribution avec circuit d'aeration sinueux

Country Status (3)

Country Link
EP (1) EP1461268A4 (fr)
AU (1) AU2002351268A1 (fr)
WO (1) WO2003050012A1 (fr)

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CN108171373A (zh) * 2017-12-26 2018-06-15 杭州电子科技大学 一种化工园区毒气泄露逃生路径规划方法

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US7621428B2 (en) 2005-07-01 2009-11-24 Nordson Corporation Dispensing cartridge with vented piston
US7481333B2 (en) 2006-03-20 2009-01-27 Nordson Corporation Propellant actuated dual fluid cartridge
US7748567B2 (en) 2006-03-29 2010-07-06 Nordson Corporation Single dose dual fluid cartridge for use with hand-held applicators
DE102008000841B8 (de) 2008-03-26 2014-07-10 Adcatec Gmbh Kartusche und Kolben mit Entlüftungsvorrichtung
CA2690171A1 (fr) * 2009-02-11 2010-08-11 Sulzer Mixpac Ag Piston de cartouche a event
DE102014105009A1 (de) * 2014-04-08 2015-10-08 Marco Systemanalyse Und Entwicklung Gmbh Kolben
WO2018144325A1 (fr) 2017-02-02 2018-08-09 Nordson Corporation Ensemble de cartouche à deux fluides
DE102017203241A1 (de) * 2017-02-28 2018-08-30 Fischbach Kg Kunststoff-Technik Kolben für Kartuschen
WO2019121399A1 (fr) 2017-12-20 2019-06-27 Sulzer Mixpac Ag Piston, cartouche et méthode de ventilation d'une cartouche

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US5150823A (en) * 1989-10-31 1992-09-29 Kabushiki Kaisha Top Combination container and pump having a conical piston for venting
US5178305A (en) * 1990-06-21 1993-01-12 Keller Wilhelm A Dispensing cartridge with storage cylinder and dispensing piston having a closure sealed vent bore
US5400926A (en) * 1991-01-29 1995-03-28 Keller; Wilhelm A. Dispensing cartridge with storage cylinder and feeding piston
DE20010417U1 (de) * 2000-06-09 2001-10-11 Sulzer Chemtech Ag Winterthur Entlüftungsvorrichtung bei einem Kolben für eine Kartusche

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DE3615659A1 (de) * 1986-05-09 1987-11-12 Hilti Ag Auspresskolben mit speicherkammer
US4819836A (en) * 1987-06-10 1989-04-11 Mega Plast Product- U. Verpackungsentwicklung Marketing Gesellschaft Mit Beschrankter Haftung & Co. Dispenser for dispensing paste compositions

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CN108171373B (zh) * 2017-12-26 2021-12-03 杭州电子科技大学 一种化工园区毒气泄露逃生路径规划方法

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WO2003050012A1 (fr) 2003-06-19
AU2002351268A1 (en) 2003-06-23

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