Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
  • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
  • F02M69/54—Arrangement of fuel pressure regulators
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
  • F02M37/04—Feeding by means of driven pumps
  • F02M37/08—Feeding by means of driven pumps electrically driven
  • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T137/00—Fluid handling
  • Y10T137/7722—Line condition change responsive valves
  • Y10T137/7781—With separate connected fluid reactor surface
  • Y10T137/7835—Valve seating in direction of flow
  • Y10T137/7836—Flexible diaphragm or bellows reactor

Definitions

• the invention relates to a device for a fuel system according to the preamble of claim 1.
• Such a device is known from DE 44 02 224 AI.
• This device has a feed pump arranged in the storage container, which can be inserted through an opening in the storage container.
• the opening in the storage container can be closed by means of a closure part on which a pressure regulator is arranged.
• the pressure regulator has a pressure chamber which has a connection to the pressure side of the feed pump, to the internal combustion engine and to a relief line.
• the closure part has a flange-like base body consisting of plastic and closing the opening.
• a recess is formed in the base body, into which a connection piece, which forms the connection between the pressure chamber and the relief chamber, and which is formed in one piece with the base body, projects.
• the recess of the base body is covered to form the pressure chamber with an elastically deformable membrane, which directly as the face of the nozzle Seat interacts.
• the membrane is acted upon by a spring towards the nozzle, and when a certain pressure in the pressure chamber is exceeded, the membrane releases the nozzle to connect the pressure chamber to the relief chamber.
• the membrane is attached to the body.
• the membrane In the known device, the membrane is inserted into the recess, the spring is attached and then the membrane is stretched together with a cover against the base body. Because the force of the spring acts on the diaphragm in the known device before the diaphragm is firmly clamped, it cannot be prevented with certainty that the diaphragm shifts somewhat to the side and malfunctions (e.g. pressure control errors, leaks, etc.) can occur. If the device is installed in an engine compartment, leaks can be very dangerous.
• the spring-receiving housing has a flange on which free ends bent over to the outside are formed.
• the flange is arranged to form a collar of a recess in the base body, as a result of which an outer edge of the membrane is clamped.
• the free ends of the flange engage behind hooks arranged on the collar, as a result of which the flange holds the housing on the base body and clamps the membrane.
• this configuration has the disadvantage that the hooks of the recess have to absorb the clamping force of the spring, which acts on the membrane, so that the membrane closes the nozzle to the pressure chamber.
• the large holding forces that occur cannot be adequately absorbed by the hooks, which can result in a drop in the control pressure.
• the base body holding the housing is made of relatively soft, easily molded plastic.
• material fatigue due to swelling of the plastic can occur after a long period of operation, as a result of which the flange of the holding element cannot be arranged with sufficient pretension for the recess in the base body and the membrane can be fixed in the recess.
• the device according to the invention for a fuel system with the features according to claim 1 has the advantage that a simple and quick assembly e.g. an easy to manufacture and functionally reliable pre-assembly module for the base body.
• the device has the advantage that complex parts for forming, for example, a pressure regulator can be formed as components of the base body, which results in a simple configuration of the preassembly module.
• the nozzle with the stop through which the fuel return is guided can thus be injected with an injection tool together with the base body as a plastic part.
• This has the advantage that no additional effort is required in the manufacture of the base body for the manufacture of the stop.
• the configuration of the pre-assembly module ensures that the spring is prevented from kinking during assembly of the module and thus that the diaphragm is in a correct position relative to the housing and is given for the stop provided on the base body. This can reliably prevent the diaphragm from moving during assembly, which means that malfunctions (eg pressure control errors, leaks, etc.) can be excluded.
• the preassembly can be arranged under pretension to the base body via the attachment.
• the attachment can preferably be designed as a resilient ring, preferably as a snap ring, which is arranged in the base body after the preassembly assembly has been inserted. This results in simple and quick assembly, which moreover enables a structurally simple configuration for receiving the preassembly on the base body.
• a further alternative embodiment of the fastening can be provided by a fastening ring injected into the base body with snap elements which can be deflected during installation and which engage behind a fastening section of the housing in the assembled state.
• a further advantageous embodiment of the fastening can be provided by a flange which encompasses a fastening section of the housing of the pre-assembly module.
• the preassembly can advantageously be arranged both on a base body of a tank flange and on a base body of a fuel rail. Regardless of these exemplary arrangements, the preassembly can be according to the above
• Fig. 1 shows a device for supplying a
• FIG. 2 shows a closure part of the storage container from FIG. 1 according to a first exemplary embodiment
• FIG. 3 shows a cross-sectional illustration of a second variant of the fastening of the preassembly module to the base body
• Fig. 5 shows an alternative embodiment of the device according to the invention in the fuel rail
• Fig. 6 shows an alternative embodiment of the device according to the invention for pressure damping of pressure pulsations of the fuel in the pressure chamber. Description of the embodiments
• a device shown in simplified form in FIG. 1 serves to supply an internal combustion engine 10 with fuel from a storage container 12.
• This has a feed pump 14 which is arranged in the storage container 12 and is held there in a manner not shown.
• the feed pump 14 can be designed in any way, and this sucks fuel on its suction side from the reservoir 16 in the reservoir 12.
• the reservoir 12 has an opening 20 in a wall 18 through which the feed pump 14 can be inserted. After the feed pump 14 has been inserted, the opening 20 can be closed with a closure part 22, a line for connecting the pressure side of the feed pump 14 to the internal combustion engine 10 being guided through the closure part 22.
• a fuel filter 15 can be arranged in the connection of the pressure side of the feed pump 14 to the closure part 22.
• FIG. 2 shows the configuration of the closure part 22 for receiving a preassembled assembly which, in the exemplary embodiment preferred for FIG. 2, forms part of a pressure regulator 24.
• the preassembled assembly is referred to below as the preassembly 23.
• the closure part 22 has a flange-like base body 30 made by injection molding from plastic, which covers the opening 20 in the storage container 12.
• a sealing element can be arranged between an outer edge of the closure part 22 and the wall 18 of the storage container 12.
• the closure member 22 is attached to the reservoir 12 in a manner not shown.
• an inwardly facing connecting piece 33 is integrally formed, to which a line (not shown) can be connected for connection to the pressure side of the feed pump 14. From the base body 30 also protrudes a further connection piece 37 to which a line (not shown) for connection to the internal combustion engine 10 can be connected.
• the connecting pieces 33 and 37 are connected to one another by channels 35 and 36 formed in the base body 30, the channel 35 of the connecting piece 33 extending approximately perpendicular to the plane 21.
• the channel 36 of the connecting piece 37 runs parallel to the plane 21 to the outside.
• the connecting piece 33 and 37 can also be arranged in other, largely arbitrary angular positions to the plane 21 or to each other.
• a transition region between the channels 35 and 36 is connected to a channel 38 which opens into a recess 43 in the base body 30.
• a socket 45 is arranged on the base body 30, which is connected to a channel 46, which opens into an inwardly facing connection piece 50, to which a line can be connected.
• the nozzle 45 has a stop 47 on its inwardly facing end face, which is closed by a membrane unit 48 in a closed position.
• This membrane unit 48 has a membrane 49, on the outwardly facing side of which a plate 51 is arranged, which rests on the stop 47 in the closed position.
• a plate 52 is arranged inwardly, on which a spring 53 is supported.
• a pressure space 44 which is closed off by the membrane 49, is formed in the recess 43.
• a return channel 55 is provided in the connector 45.
• the return channel 55 leads from the stop 47 provided on the end face of the connector 45 to the channel 46. Fuel can thus flow from the stop 47, through the return channel 55, through the channel 46 and through the connecting piece 50 into the reservoir 12.
• a valve body 60 is connected to the membrane unit 48.
• the valve body 60 is held in a recess provided in the plate 51.
• the spring 53 acts on the membrane unit 48 against the stop 47. If the pressure in the pressure chamber 44 is below a certain value, the valve body 60 bears against the stop 47. In this state, the path for the fuel from the pressure chamber 44 into the return line 55 is blocked.
• the diaphragm unit 48 is displaced against the counterforce exerted by the spring 53, and the valve body 60 lifts off the stop 47. In this state, fuel can reach the return channel 55 from the pressure chamber 44.
• the spring 53 exerts a counterforce on the membrane unit 48.
• the counterforce can also be created in other ways.
• a gas space can be provided which acts pneumatically on the membrane 49 and thus acts on the membrane unit 48 against the stop 47.
• the channels 35 and 38 form a fuel connection 40.
• the fuel connection 40 runs through the base body 30.
• the fuel connection 40 leads the fuel supplied by the feed pump 14 or part of the fuel delivered into the pressure chamber 44.
• the preassembly module 23 of the pressure regulator 24 has a two-part housing 54, which consists of an upper part and a lower part.
• the upper part of the housing 54 is referred to below as the first housing part 56, and the lower part is subsequently referred to as the second housing part 57.
• the housing 54 can also consist of three or more than three housing parts.
• the first housing part 56 and the second housing part 57 are advantageously formed from sheet steel.
• the first housing part 56 and the second housing part 57 have at their free ends two mutually facing sections 58, 59 arranged parallel to one another, between which the membrane 49 is clamped in its edge region. Another section adjoins section 59 of housing part 57
• the edge regions of the first housing part 56 and the second housing part 57 can also be pressed together or fixed to one another in some other way, so that the membrane 49 is clamped to its outer edge region. This flanging fixes the first housing part 56 to the second housing part 57, so that the membrane unit 48 or the membrane 49 is held securely.
• the second housing part 57 has an opening
• the flanging of the housing parts 56, 57 on their respective outer circumference in the region of the sections 58, 59, 61 forms a fixed connection 70 between the first housing part 56 and the second housing part 57 of the two-part housing 54.
• the fixed connection 70 means that the outer edge region is Membrane 49 of the membrane unit 48 firmly and tightly clamped between the two housing parts 56 and 57.
• the pre-assembly module 23 is arranged in a recess 63 of the base body 30.
• the recess 43 provided in the base body 30 merges into the recess 63 at a radial shoulder 63a.
• the surface of section 59 of the preassembly module 23 facing the base body 30 bears against the radial shoulder 63a of the base body 30.
• a sealing element 64 is arranged between the second housing part 57 and the base body 30, which enables a seal between the base body 30 and the preassembly module 23.
• the sealing element 64 serves to ensure that the fuel cannot escape unintentionally between the housing 54 and the base body 30 from the pressure chamber 44.
• the section 59 of the second housing part 57 has a cam-shaped, circumferential elevation (not shown) which engages on the shoulder 63a.
• This cam-shaped elevation can engage in a recess provided in the radial shoulder 63a.
• the shoulder 63a is flat or the recess is smaller than the circumferential elevation. It can thereby be achieved that a fairly high surface pressure and thereby a good sealing effect and good holding of the assembly 23 to the recess is ensured. Even if the depression in the base body 30 is dispensed with, the elevation results in a metallic seal with high surface pressure and thus a good sealing effect.
• the sealing element 64 can thus be saved or can be provided as an additional seal.
• the preassembly module 23 is inserted into the recess 63 until the preassembly module 23 with its section 59 comes to bear against the radial shoulder 63a.
• the recess 63 is surrounded by an annular, circumferential bead protruding into the reservoir 12.
• the bead is relatively narrow and can therefore be easily bent with a simple stamp.
• the bead forms a deformable region 66 of the base body 30.
• the bead Before the preassembly module 23 is fastened to the base body 30, the bead has a cylindrical shape. In order to fasten the preassembly module 23 to the base body 30, the bead projecting over the sections 58, 59, 61 is bent radially inwards.
• the fixed connection 70 formed from the sections 58, 59, 61 of the housing 54 represents a stable, resilient area of the housing 54
• this area of the housing 54 is also used as a fastening section 80a for the connection 80 between the preassembly assembly 23 and the base body 30 used. This has the advantage that no area of the housing 54 has to be specially reinforced for the engagement of the fastening 80 on the housing 54.
• the second housing part 57 expediently has a cylindrically extending shoulder 67, as a result of which the preassembly module 23 can be arranged in a defined position in relation to the recess 63.
• the bead is flanged.
• the pre-assembly module 23 is arranged in the recess 63 of the base body 30. This ensures that the preassembly module 23 is held precisely, which in turn provides a precise positioning of the membrane group 48 with respect to the nozzle 45.
• a relief opening 65 is provided in the first housing part 56 of the housing 54.
• the pressure regulator 24 is arranged directly in the area of the internal combustion engine 10, to connect the relief opening 65 to a suction line leading to the internal combustion engine 10, for example with a suction line leading to the internal combustion engine 10, for the sake of clarity, so that the diaphragm unit
• the attachment 80 of the preassembly module 23 to the base body 30 can alternatively be provided by flanging or caulking the bead of the deformable region 66.
• This embodiment of the preassembly module 23 according to the invention further enables the connection piece 45 to be integrated in the base body 30 of the closure part 22, which enables a simple configuration of the pressure regulator 24, as well as a cost-effective configuration of the base body 30 itself illustrated embodiment surrounds the bead serving as a deformable region 66 without interruption the outer edge of the recess 63.
• FIG. 3 shows a variant of the fastening 80 of the preassembly module 23 to the base body 30 of the closure part 22 on an enlarged scale in comparison to FIG. 2.
• the base body 30 has a groove 71 into which a ring 72 can be arranged in the recess 63 after the preassembly assembly 23 has been positioned.
• This ring 72 can be designed as a snap ring, which enables the preassembly 23 to be held securely in the recess 63.
• the ring 72 has a radially extending slot at one point on its circumference.
• the ring 72 is elastic, springs outward in the radial direction and thus holds securely in the groove 71 with elastic pretension.
• This configuration has the advantage that the preassembly module 23 can be replaced easily and tolerance compensation is possible.
• the ring 72 has in front of his Installation in the groove 71 viewed in cross section • an approximately frustoconical shape, similar to a plate spring.
• the ring 72 is inserted around the groove 71 in such a way that the inner diameter of the ring 72 abuts first on the section 61 of the fastening section 80a of the housing 54 of the preassembly 23 and so that the outer diameter of the ring 72 on the flank facing away from the section 61 71a of the groove 71 comes to rest.
• the distance between the flank 71a of the base body 30 and the radially extending shoulder 63a is matched to the thickness of the ring 72 and the thickness of the fastening section 80a comprising the sections 58, 59, 61 such that the ring 72 is installed in the groove 71 elastically deformed in the holding direction.
• the ring 72 By installing the ring 72 in the groove 71, the ring 72 is partially or completely flattened, for example with the aid of a stamping tool. This results in a preload after the installation of the ring 72 in the groove 71 in the ring 72, so that the fastening 80 holds the preassembly module 23 on the base body 30 with elastic preload.
• the embodiment can also be modified so that the ring 72, viewed in the circumferential direction, is slightly wavy, the wave shape being matched to the installation dimensions so that the waves of the ring 72 are somewhat flattened in the holding direction after installation in the groove 71 and thus the ring 72, due to its elastic deformation, presses the fastening section 80a against the radial shoulder 63a of the base body 30 with prestress.
• This also means that the attachment 80 ensures an easy to manufacture, durable and safe positioning of the preassembly 23 relative to the base body 30.
• a plate-spring-shaped ring is arranged, which positions the preassembly module 23 under prestress in the recess 63 by subsequent caulking or caulking or flanging the deformable region 66 of the base body 30.
• the diameter of the opening 62 provided centrally in the second housing part 57 is smaller than the outer diameter of the plate 51 of the membrane unit 48 facing the opening 62. This results in a stop 73 on the second housing part 57, against which the Plate 51 of the membrane unit 48 can come to rest.
• the plate 51 lies against the stop 73.
• the stop 73 holds back the plate 51 so that the spring 53 cannot overstretch the membrane 49.
• the preassembly 23 is easy to handle, easy to store, and the preassembly 23 is also well protected from damage before being attached to the base body 30.
• the pre-assembly 23 is attached to the base body 30, then there is sufficient distance between the stop 73 and the membrane unit 48, so that the membrane unit 48 can not come to rest against the stop 73 but at the stop 47 in the installed state.
• a ring with a thread can be used which fixes the housing 54 in the recess 63. Due to the inclusion of the membrane 49 between the sections 58 and 59 of the first housing part 56 and the second housing part 57, the position is correct Given the membrane unit 48, since the threaded ring engages the section 61 of the second housing part 57 and has no influence on the membrane group 48 during the fastening process.
• the fastening 80 which serves to fasten the preassembly module 23 to the base body 30, can be carried out by means of a fastening ring 75 injected into the base body 30.
• the mounting ring 75 has at its inward end, i.e. at its end pointing away from the base body 30, distributed over the circumference on tabs 76, which are bent after the positioning of the preassembly 23 in the recess 63 so that they engage behind the section 61 of the second housing part 57 and fix the preassembly 23 in the recess 63 .
• the fastening ring 75 is made of resilient steel, for example, and the length of the fastening ring 75 in the holding direction is so matched to the fastening section 80a of the preassembly 23 that the fastening ring 75 is elastically deformed when the tabs 76 are bent, and due to this elastic deformation of the fastening ring 75, the one Housing 54 against the radial shoulder 63 exciting elastic bias occurs.
• the fastening ring 75 has at its end facing away from the base body 30 snap elements which can be deflected during the installation process of the preassembly module 23 and which in the installed state engage behind the section 61 of the second housing part 57 with its hook elements and again in the recess 63 establish.
• Other alternative embodiments of the attachment 80 that are simple Enabling the pre-assembly 23 allow are also conceivable.
• FIGS. 1 to 4 show the pressure regulator 24 which is arranged on the closure part 22.
• the pressure regulator 24 is installed in the reservoir 12 and is designed as a so-called return-free system.
• the return-free system is so named because in this system, excess fuel not required by the internal combustion engine 10 is returned directly to the reservoir 12 by the pressure regulator 24 provided in the closure part 22 and therefore no excess fuel is returned from the engine 10 to the reservoir 12 Return line is required.
• FIG. 5 shows an alternative embodiment of the device according to the invention in a fuel rail 82.
• the base body 30 is not part of the closure part 22 as in the embodiment shown in FIG. 2, but the base body 30 is part of the fuel rail 82.
• the base body 30 corresponds essentially to the shape that is described in FIG. 2, without, however, fastening means are provided through which the base body 30 is arranged on the storage container 12.
• the options described in FIGS. 2 to 4 can also be optionally provided for fastening the preassembly module 23 to the base body 30.
• the fuel rail 82 is typically located in the engine compartment near the engine 10. The fuel passes from the feed pump 14 (FIG. 1) via a feed line to the channel 35 in the connecting piece 33 (FIG. 5).
• pressure regulator 24 can also be provided at any other point in the fuel supply system.
• the connection 70 is formed by crimping the two housing parts 56, 57 on their outer circumference, through which the two housing parts 56, 57 are firmly connected to one another and the membrane 49 is installed in the housing 54 firmly, tightly, reliably and in a durable manner.
• the pressure chamber 44 is connected to the fuel connection 40. Fuel can be supplied to the pressure chamber 44 or fuel can be removed from the pressure chamber 44 via the fuel connection 40.
• the device shown in FIG. 6 is used, for example, for smoothing pressure pulsations of the fuel in the pressure chamber 44 or in the fuel connection 40.
• This device is therefore usually referred to as a pressure damper.
• the device shown in FIG. 6 can also be dimensioned such that the membrane 49 has a relatively large working stroke, so that the device can absorb a corresponding amount of fuel when the pressure rises, which the pressure chamber 44 then again when the pressure in the fuel drops emits, which is why this device is also referred to as a fuel accumulator with appropriate dimensioning.
• the counterforce caused by the spring 53 acts on the membrane unit 48 against the stop 47. If there is no pressure in the pressure chamber 44 or the pressure in the pressure chamber 44 is below a certain value, then the middle, movable area of the membrane unit 48 lies at the stop 47 on. If the pressure in the pressure space 44 exceeds a certain value, then the membrane unit 48 lifts from the stop 47.
• the stop 47 has the function of an end stop or a rest stop against which the membrane unit 48 can come to rest.
• the valve body 60 provided in FIG. 3 was dispensed with in this exemplary embodiment, so that in FIG. 6 the plate 51 firmly connected to the membrane 49 comes to rest against the stop 47 serving as an end stop.
• the attachment 80 according to the invention for the preassembly 23 is also possible on a base body 30 made of metal.
• a base body 30 made of metal.
• pinched or clamped resilient ring to the base body 30 is arranged.
• the preassembly module 23 provides a secure mounting and positioning of the membrane 49 or the membrane unit 48, so that regardless of the other design of the device, in particular regardless of whether the device works as a pressure regulator, as a pressure damper or as a storage device, the preassembly module 23 is positioned in the correct position with respect to the base body 30, as a result of which the membrane 49, which separates the pressure chamber 44, is securely positioned and functional.
• the membrane unit 48 is located essentially within the preassembly 23.
• the stop 47 which, depending on the use for the device, serves as a valve seat or as an end stop, is provided on the base body 30.
• the stop 47 can be produced together with the base body 30 by simply spraying or pouring or injection molding the base body 30 together with the base body 30. No additional effort or an insignificant additional effort is required to produce the stop 47 on the base body 30.
• the pre-assembly 23 can be manufactured without the stop 47, the manufacture of the pre-assembly 23 is very simple.
• a functional device which, depending on the other design, can work, for example, as a pressure regulator or, for example, as a pressure damper or as a memory.
• a tried and tested flared connection can be used, which has been carried out in large numbers so far and which has proven itself well and is easy to produce. Because the preassembly 23 does not have to be provided with a stop which is expensive to manufacture, the manufacture of the preassembly 23 can be controlled very easily and safely.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Fuel-Injection Apparatus (AREA)
• Portable Nailing Machines And Staplers (AREA)
• Harvesting Machines For Specific Crops (AREA)
• Output Control And Ontrol Of Special Type Engine (AREA)
• Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7813914

Family Applications (1)

Country Status (10)

Families Citing this family (8)

Family Cites Families (9)

• 1996
  • 1996-12-06 DE DE19650783A patent/DE19650783A1/de not_active Withdrawn
• 1997
  • 1997-11-17 WO PCT/DE1997/002690 patent/WO1998025024A1/fr not_active Application Discontinuation
  • 1997-11-17 BR BR9707490A patent/BR9707490A/pt not_active IP Right Cessation
  • 1997-11-17 DE DE59709704T patent/DE59709704D1/de not_active Expired - Lifetime
  • 1997-11-17 KR KR1019980705817A patent/KR19990082095A/ko not_active Application Discontinuation
  • 1997-11-17 ES ES97949937T patent/ES2196379T3/es not_active Expired - Lifetime
  • 1997-11-17 EP EP97949937A patent/EP0906505B1/fr not_active Expired - Lifetime
  • 1997-11-17 JP JP52504398A patent/JP4082738B2/ja not_active Expired - Fee Related
  • 1997-11-17 CN CN97192062A patent/CN1075161C/zh not_active Expired - Fee Related
  • 1997-11-17 AT AT97949937T patent/ATE236353T1/de not_active IP Right Cessation
  • 1997-11-17 US US09/117,805 patent/US6161574A/en not_active Expired - Lifetime

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events