US20060123836A1 - Collecting tank, heat exchanger and coolant circuit - Google Patents

Collecting tank, heat exchanger and coolant circuit Download PDF

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Publication number
US20060123836A1
US20060123836A1 US10/533,867 US53386705A US2006123836A1 US 20060123836 A1 US20060123836 A1 US 20060123836A1 US 53386705 A US53386705 A US 53386705A US 2006123836 A1 US2006123836 A1 US 2006123836A1
Authority
US
United States
Prior art keywords
collecting tank
plug
housing
heat exchanger
aperture
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.)
Abandoned
Application number
US10/533,867
Other languages
English (en)
Inventor
Martin Kaspar
Kurt Molt
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.)
Mahle Behr GmbH and Co KG
Original Assignee
Behr GmbH and Co KG
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 Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Assigned to BEHR GMBH & CO. KG reassignment BEHR GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KASPAR, MARTIN, MOLT, KURT
Publication of US20060123836A1 publication Critical patent/US20060123836A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/044—Condensers with an integrated receiver
    • F25B2339/0441—Condensers with an integrated receiver containing a drier or a filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/16—Receivers
    • F25B2400/162—Receivers characterised by the plug or stop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2220/00—Closure means, e.g. end caps on header boxes or plugs on conduits

Definitions

  • the invention relates to a collecting tank having a drain plug, and to a heat exchanger and a coolant circuit.
  • Heat exchange media as in the coolant circuits of air conditioning systems are often led through collecting tanks thereby serving, on the one hand, to equalize the pressure, and on the other possibly ensuring the complete condensation of any refrigerant.
  • a heat exchange medium in such a collecting tank may have particles removed by means of a filter device and any water removed by means of a drier device.
  • a collecting tank of this type is described in DE 100 39 260 A1 of the present applicant.
  • the collecting tank described accommodates a drier, which for maintenance purposes can be changed by way of an aperture that can be closed by a removable cover.
  • the cover in this case takes the form of a cylindrical plug and is axially displaceable and sealed in a corresponding cylindrical bore of the collecting tank.
  • this plug is fixed by a retainer ring, the retainer ring being secured to prevent its release by a locking offset bearing on the plug.
  • the plug is at the same time pressed axially outwards against the retainer ring by an excess pressure acting on said plug, as is present inside the collecting tank during operation. To open, the plug must be pressed inwards when the collecting tank is unpressurized, so that the retainer ring is released and can be removed, following which the plug can also be removed from the collecting tank.
  • the bore is sealed by way of two sealing rings, which are each arranged in an annular groove in the plug and are pressed into the annular grooves by introducing the plug into the collecting tank.
  • the outside dimensions of the plug must on the one hand be matched precisely to the inside dimensions of the bore.
  • the plug must be composed of the same material as the collecting tank, in order to prevent a diminishing sealing effect during operation of the collecting tank, since different materials are possibly subjected to different degrees of thermal expansion owing to the naturally occurring temperature fluctuations of the heat exchange medium.
  • the plug is also made of aluminum.
  • the strength of this material means that it is possible to make the plug hollow, in order to save weight and material costs, without having to accept a reduction in the dimensional stability of the plug.
  • the object of the present invention is to provide a collecting tank, a heat exchanger and/or a coolant circuit, in which simplified and/or inexpensive manufacture and possibly an improved sealing effect can be achieved.
  • a collecting tank for a heat exchange medium comprises a housing, in which a drier and/or filter device can be accommodated.
  • the housing is provided with an aperture, which can be closed by a removable plug and through which the drier and/or filter device can be received into and removed from the housing, so that the drier and/or filter device is of replaceable design.
  • the housing aperture can be closed by a removable plug and sealed by a sealing means.
  • the sealing means may be one or more sealing rings, which is/are composed of an elastomer material such as rubber or Teflon.
  • the object of the invention is advantageously achieved in that the plug is elastically deformable. Whilst the collecting tank is in operation the plug can thereby be deformed by an internal pressure in such a way that the plug is pressed against an edge of the housing aperture by the sealing means. This ensures the desired sealing even when the plug, simply by virtue of its dimensions, would be incapable of exerting sufficient pressure on the sealing means, which may be the case, for example, due to an inaccurate production dimension or to different degrees of thermal expansion of the plug and the housing.
  • the term elastically deformable plug is taken to mean a plug which due to the application of a pressure inside the collecting tank modifies its shape in such a way that the sealing means is subjected to a force.
  • An ordinary operating pressure for heat exchange media such as refrigerant in air conditioning systems, for example, is already sufficient for this purpose. In this sense a solid aluminum plug, for example, possesses no elastic deformability.
  • the elastic deformability of the plug can be achieved on the one hand by a suitable plug geometry.
  • the plug has a recess, for example, with a thin wall in such a way that the wall can be pressed against an edge of the housing aperture by means of a pressurized heat exchange medium present inside the recess.
  • the plug is preferably designed basically as a hollow cylinder with an open end towards the interior of the housing, the aperture having a circular cross-section.
  • the heat exchange medium then presses the cylinder wall radially towards an edge of the aperture, with the result that the sealing means, preferably a sealing ring, is uniformly compressed, achieving an effective sealing action.
  • the structure of the collecting tank is particularly simplified if the housing is designed as a tube having an open end. The aperture is then formed by the open tube end, into which the plug can be received.
  • the plug from an elastically deformable material.
  • the plug is pressed against an edge of the housing aperture by the pressure of the heat exchange medium, so that the sealing means is compressed in order to achieve an improved sealing effect.
  • a combination of a suitable plug geometry with the selection of an elastically deformable material is especially preferred.
  • a hollow-cylindrical plastic plug is particularly well-suited as removable closure for the collecting tank, since a plastic affording sufficient elasticity for a deformability according to the invention together with sufficient strength for closing the collecting tank makes it an automatic choice.
  • the plug preferably has a shielding element.
  • the shielding element more preferably takes the form of a metalized coating or enameled coating, which is applied at least to the side of the plug facing the interior of the housing.
  • the plug is integrally formed with the sealing means, the resulting reduction in the number of components serving to reduce the assembly cost of the collecting tank.
  • the sealing means can be molded onto the plug with the result that an especially simple one-piece plug design with the sealing means can be achieved.
  • the plug is preferably secured to prevent it falling out of the collecting tank, being held in the aperture by a retainer ring.
  • detachment of the retainer ring from any annular groove provided in the edge of the housing aperture is prevented by securing the retainer ring by means of a locking offset, which is provided on the plug and which bears on the inside edge of the retainer ring.
  • the collecting tank according to the invention is inserted into a heat exchanger, having tubes, fins and two head pieces, in such a way that a heat exchange medium flowing through the heat exchanger flows previously, subsequently or in the meantime through the collecting tank.
  • the heat exchanger here takes the form of a condenser, a drier then most preferably being introduced into the collecting tank.
  • Such heat exchangers have been disclosed in DE 42 38 853 C2, which hereby expressly forms part of the disclosure.
  • the collecting tank according to the invention is inserted into a coolant circuit of an air conditioning system having a compression element, a first heat exchanger, an expansion element and a second heat exchanger, in order to permit collecting of the refrigerant.
  • the collecting tank here in particular contains a drier for the refrigerant.
  • the compression element is in this case a compressor
  • the first heat exchanger is a condenser
  • the expansion element is an expansion valve
  • the second heat exchanger is an evaporator.
  • FIG. 1 shows a heat exchanger having a collecting tank according to the invention
  • FIG. 2 shows a detail of a collecting tank in cross-section.
  • FIG. 1 represents a condenser ( 1 ) of a coolant circuit (otherwise not shown) for an air conditioning system. It has a tube-fin block ( 10 ) with tubes ( 11 ) and fins ( 12 ) arranged between these.
  • a first collecting pipe ( 13 ) is provided with a feed connection ( 15 ) for a gaseous refrigerant coming from a compression element (not shown), such as a compressor, for example, and with an outlet connection ( 16 ) for liquid refrigerant flowing to an expansion element (likewise not shown), such as an expansion valve, for example.
  • a compression element such as a compressor
  • an expansion element such as an expansion valve
  • the two collecting pipes ( 13 , 14 ) are subdivided by dividing walls ( 17 , 18 , 19 , 20 ), 21 , 22 , 26 , 27 ) into head pieces ( 33 , 24 ) communicating with the connections ( 15 , 16 ) and into intermediate pieces ( 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 ) in such a way that the refrigerant from the head piece ( 33 ) to the intermediate piece ( 40 ) and from the intermediate piece ( 42 ) to the head piece ( 34 ) in each case describes a serpentine path through the condenser ( 1 ), the flow cross-section being likewise reduced as cooling increases accordingly with the diminishing volume of the gaseous and/or liquid refrigerant.
  • the collecting pipes ( 13 , 14 ) are sealed fluid-tight by end walls ( 28 , 29 , 30 , 31 ).
  • a collecting tank ( 43 ) Connected to the collecting pipe ( 14 ) is a collecting tank ( 43 ), which serves for collecting the condensed refrigerant.
  • the housing ( 23 ) of the collecting tank ( 43 ) has an inlet aperture ( 24 ) and an outlet aperture ( 25 ), which communicate with the intermediate pieces ( 40 ) and ( 42 ) respectively of the collecting pipe ( 14 ).
  • Inside the housing ( 23 ) is a drier and filter device ( 32 ), which can be removed from the housing ( 23 ).
  • the tubular housing ( 23 ) is closed at one end by a removable plug ( 44 ), so that the drier and filter device ( 32 ) can be replaced, for maintenance purposes, for example, via the aperture ( 45 ).
  • FIG. 2 shows a more detailed, cross-sectional view of part of a collecting tank ( 100 ) having a plug ( 110 ).
  • the collecting tank comprises a round tubular shaped housing ( 120 ), one end ( 130 ) of which is open.
  • the housing ( 120 ) has an inlet aperture (not visible) and an outlet aperture ( 140 ) for a heat exchange medium such as a refrigerant, for example.
  • a connection to an adjoining collecting pipe ( 150 ) with dividing and end walls ( 160 , 170 ) is made via an opening ( 180 ) in the collecting pipe ( 150 ), a raised edge ( 190 ) of the aperture ( 180 ) engaging in the outlet aperture ( 140 ) of the collecting tank ( 100 ).
  • the open end ( 130 ) of the housing ( 120 ) is closed by the removable plug ( 110 ), which has a cylindrical shape matched to the shape of the housing.
  • the working principle of the retainer ring ( 260 ) is described in detail in the aforementioned DE 100 39 260 A1, which hereby likewise expressly forms part of the disclosure. Removal of the plug ( 110 ) from the housing ( 120 ) is facilitated by a screw (now shown), which can be screwed into the blind tapped hole ( 270 ), so that the plug ( 110 ) can be easily drawn out of the aperture ( 130 ).
  • the plug ( 110 ) is made from an elastically deformable plastic, with the result that the plug ( 110 ) and in particular the wall ( 240 ) thereof is elastically deformable. It should be noted that the deformability of the plug ( 110 ) is not so pronounced as to jeopardize the closing action by means of the retainer ring ( 260 ).
  • the heat exchange medium present inside the housing ( 120 ) thereof is under pressure and from the cavity ( 280 ) of the hollow cylindrical plug ( 110 ) exerts a force on the inside ( 290 ) of the wall ( 240 ) of the plug ( 110 ).
  • the wall ( 240 ) then bends radially away from the cylinder axis ( 300 ) towards the edge of the aperture ( 130 ), which in this exemplary embodiment is represented by the tubular wall of the housing ( 120 ).
  • the sealing rings ( 200 , 210 ) in the annular grooves ( 220 , 230 ) are pressed against the housing ( 120 ) and ensure a secure seal.
  • annular grooves ( 220 , 230 ) with the sealing rings ( 200 , 210 ) are arranged precisely in an area of the wall ( 240 ) on a level with the cavity ( 280 ), so that the force generated by the pressure of the heat exchange medium and acting on the inside ( 290 ) of the wall ( 240 ) is transmitted sufficiently to the sealing rings ( 200 , 210 ).
  • the plug ( 110 ) in the area of the wall ( 240 ) is relatively thin, in order to further assist this transmission of force.

Landscapes

  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
US10/533,867 2002-11-05 2003-10-22 Collecting tank, heat exchanger and coolant circuit Abandoned US20060123836A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10251777A DE10251777A1 (de) 2002-11-05 2002-11-05 Sammelbehälter, Wärmetauscher und Kältemittelkreislauf
DE10251777.0 2002-11-05
PCT/EP2003/011692 WO2004042292A1 (de) 2002-11-05 2003-10-22 Sammelbehälter, wärmetauscher und kältemittelkreislauf

Publications (1)

Publication Number Publication Date
US20060123836A1 true US20060123836A1 (en) 2006-06-15

Family

ID=32115317

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/533,867 Abandoned US20060123836A1 (en) 2002-11-05 2003-10-22 Collecting tank, heat exchanger and coolant circuit

Country Status (8)

Country Link
US (1) US20060123836A1 (de)
EP (1) EP1561077B1 (de)
CN (1) CN1711450A (de)
AT (1) ATE507443T1 (de)
AU (1) AU2003283290A1 (de)
BR (1) BR0315982A (de)
DE (2) DE10251777A1 (de)
WO (1) WO2004042292A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009276011A (ja) * 2008-05-16 2009-11-26 Sanden Corp 受液器一体型凝縮器
US20220041033A1 (en) * 2020-08-05 2022-02-10 Denso International America, Inc. Hermetically sealed cap for heat exchanger modulator
US20220178485A1 (en) * 2020-12-04 2022-06-09 Mahle International Gmbh Closure plug for a collector of a refrigerant circuit

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10347679A1 (de) 2003-10-09 2005-05-04 Behr Gmbh & Co Kg Wärmeübertrager für ein Kraftfahrzeug, insbesondere Kühlmittel/Luft-Kühler
DE102012220594A1 (de) * 2012-09-21 2014-03-27 Behr Gmbh & Co. Kg Kondensator
EP3163243B1 (de) * 2015-10-28 2019-08-14 Borgwarner Emissions Systems Spain, S.L.U. Verdampfer
DE102021201735A1 (de) * 2021-02-24 2022-08-25 Mahle International Gmbh Sammler eines Kältemittelkreislaufs

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2168734A (en) * 1937-02-10 1939-08-08 Freeman William Simon Stopper for bottles, jars, and similar containers
US2848130A (en) * 1953-10-07 1958-08-19 Duo Vent Vacuum Closure Compan Pressure resistant closures
US5084314A (en) * 1989-05-29 1992-01-28 Tokai Rubber Industries, Ltd. Refrigerant transporting hose having phenolic resin layer
US5537839A (en) * 1992-11-18 1996-07-23 Behr Gmbh & Co. Condenser with refrigerant drier
US5666791A (en) * 1994-06-22 1997-09-16 Behr Gmbh & Co. Vehicle air conditioner condenser insert
US5992174A (en) * 1997-03-26 1999-11-30 Behr Gmbh & Co. Insert for a collector profile of a condenser
US6295832B1 (en) * 1997-07-28 2001-10-02 Zexel Corporation Receiver tank
US20010025511A1 (en) * 2000-03-09 2001-10-04 Michele Bernini Filter cartridge and condenser
US6349562B1 (en) * 1999-09-10 2002-02-26 Behr Gmbh & Co. Closure for an air conditioner collection vessel
US6446464B1 (en) * 2000-10-25 2002-09-10 Skg Italiana Spa Condenser module and dryer
US6446714B1 (en) * 1998-10-22 2002-09-10 Behr Gmbh & Co. Brazed condenser for an air conditioner

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29710638U1 (de) * 1997-06-18 1997-08-14 Deutsche Controls GmbH, 80637 München Aufnahmebehälter für eine Dessikativ-Charge
DE10039260B4 (de) 1999-09-10 2007-03-29 Behr Gmbh & Co. Kg Verschluß für einen Sammelbehälter
JP4062862B2 (ja) * 2000-06-05 2008-03-19 東海ゴム工業株式会社 金属複合コルゲートホースとその製造方法
JP2002061778A (ja) * 2000-08-22 2002-02-28 Bridgestone Corp 冷媒輸送用ホース

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2168734A (en) * 1937-02-10 1939-08-08 Freeman William Simon Stopper for bottles, jars, and similar containers
US2848130A (en) * 1953-10-07 1958-08-19 Duo Vent Vacuum Closure Compan Pressure resistant closures
US5084314A (en) * 1989-05-29 1992-01-28 Tokai Rubber Industries, Ltd. Refrigerant transporting hose having phenolic resin layer
US5537839A (en) * 1992-11-18 1996-07-23 Behr Gmbh & Co. Condenser with refrigerant drier
US5666791A (en) * 1994-06-22 1997-09-16 Behr Gmbh & Co. Vehicle air conditioner condenser insert
US5992174A (en) * 1997-03-26 1999-11-30 Behr Gmbh & Co. Insert for a collector profile of a condenser
US6295832B1 (en) * 1997-07-28 2001-10-02 Zexel Corporation Receiver tank
US6446714B1 (en) * 1998-10-22 2002-09-10 Behr Gmbh & Co. Brazed condenser for an air conditioner
US6629560B2 (en) * 1998-10-22 2003-10-07 Behr Gmbh & Co. Brazed condenser for an air conditioner
US6349562B1 (en) * 1999-09-10 2002-02-26 Behr Gmbh & Co. Closure for an air conditioner collection vessel
US20010025511A1 (en) * 2000-03-09 2001-10-04 Michele Bernini Filter cartridge and condenser
US6446463B2 (en) * 2000-03-09 2002-09-10 S.K.G. Italiana S.P.A. Filter cartridge and condenser
US6446464B1 (en) * 2000-10-25 2002-09-10 Skg Italiana Spa Condenser module and dryer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009276011A (ja) * 2008-05-16 2009-11-26 Sanden Corp 受液器一体型凝縮器
US20220041033A1 (en) * 2020-08-05 2022-02-10 Denso International America, Inc. Hermetically sealed cap for heat exchanger modulator
US11712942B2 (en) * 2020-08-05 2023-08-01 Denso International America, Inc. Hermetically sealed cap for heat exchanger modulator
US20220178485A1 (en) * 2020-12-04 2022-06-09 Mahle International Gmbh Closure plug for a collector of a refrigerant circuit

Also Published As

Publication number Publication date
ATE507443T1 (de) 2011-05-15
WO2004042292A1 (de) 2004-05-21
BR0315982A (pt) 2005-09-20
EP1561077B1 (de) 2011-04-27
DE50313654D1 (de) 2011-06-09
CN1711450A (zh) 2005-12-21
EP1561077A1 (de) 2005-08-10
AU2003283290A1 (en) 2004-06-07
DE10251777A1 (de) 2004-05-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BEHR GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KASPAR, MARTIN;MOLT, KURT;REEL/FRAME:016822/0888

Effective date: 20050421

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION