DK146637B - CONTROL VALVE FOR REGULATING A FLUIDUM FLOW THROUGH A MAIN VALVE PLACED BETWEEN THE CONTROL VALVE ACCESS AND EASY SIDE - Google Patents
CONTROL VALVE FOR REGULATING A FLUIDUM FLOW THROUGH A MAIN VALVE PLACED BETWEEN THE CONTROL VALVE ACCESS AND EASY SIDE Download PDFInfo
- Publication number
- DK146637B DK146637B DK286180A DK286180A DK146637B DK 146637 B DK146637 B DK 146637B DK 286180 A DK286180 A DK 286180A DK 286180 A DK286180 A DK 286180A DK 146637 B DK146637 B DK 146637B
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- Prior art keywords
- valve
- control
- control valve
- pilot
- pressure
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/38—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side
- F16K31/383—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston
- F16K31/3835—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor in which the fluid works directly on both sides of the fluid motor, one side being connected by means of a restricted passage and the motor being actuated by operating a discharge from that side the fluid acting on a piston the discharge being effected through the piston and being blockable by a mechanically-actuated member making contact with the piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
- Control Of Fluid Pressure (AREA)
Description
146637146637
Opfindelsen angår en styreventil af den i krav l*s indledning angivne art.The invention relates to a control valve of the kind specified in the preamble of claim 1.
Styreventilens pilotventil kan naturligvis betjenes manuelt, men ved i almindelighed forekommende anven-5 delser styres pilotventilen af temperaturen eller trykket på et repræsentativt sted i det kredsløb, som styreventilen er en del af, ved hjælp af en termostat eller pressostat.The pilot valve of the control valve can of course be operated manually, but in commonly used applications, the pilot valve is controlled by the temperature or pressure at a representative location in the circuit of which the control valve is a part, by means of a thermostat or pressure switch.
Ved styreventiler af den omhandlede art tilstræber 10 man at tilpasse det temperaturinterval eller proportionalitetsbånd, der er imellem fuldt åben og fuldt lukket ventil, til reguleringskredsens dynamiske forhold for derved at optimere reguleringsnøjagtigheden uden at skabe svingninger i systemet.In the case of control valves of this kind, 10 attempts to adapt the temperature range or proportionality band, which is between fully open and fully closed valve, to the dynamic conditions of the control circuit, thereby optimizing the control accuracy without creating vibrations in the system.
15 Det er blandt andet fra beskrivelserne til de tyske patentkrifter nr. 260 157, nr. 262 224 og nr. 270 220 kendt at udforme en ventil, der kan styres af en pilotventil, ved hjælp af et i hovedventilen fast indbygget reguleringsorgan, hvis kontur bestemmer ventilens ven-20 tilkarakteristik, der er det relative flow gennem ventilen som funktion af pilotventilens relative åbning p ved et trykfald over ventilen på 1 Kp pr. cm . Det er også velkendt, at den af fremstillings- og funktionstekniske årsager nødvendige spalte omkring regulerings-25 organet bevirker, at hovedventilen pludselig lukker helt, når pilotventilens åbning er under den kritiske værdi, hvor flowstrømmen gennem pilotventilen er mindre end flowstrømmen gennem spaltearealet omkring reguleringsorganet, hvilket bevirker, at ventilens ventilkarakteri-30 stik får et diskontinuert spring ved denne kritiske åbningsgrad, hvorfor ventilen vil være uegnet som reguleringsventil .15 It is known, inter alia, from the descriptions of German Patent Nos. 260,157, Nos. 262,224 and Nos. 270,220, to design a valve that can be controlled by a pilot valve, by means of a control element fixed in the main valve whose contour determines the valve characteristic of the valve, which is the relative flow through the valve as a function of the relative opening p of the pilot valve at a pressure drop across the valve of 1 Kp. cm. It is also well known that, for manufacturing and functional reasons, the gap around the regulator means that the main valve suddenly closes completely when the opening of the pilot valve is below the critical value, where the flow of flow through the pilot valve is less than the flow of flow through the gap area around the regulator. which causes the valve valve connector to have a discontinuous jump at this critical aperture, so the valve will be unsuitable as a control valve.
Til egentlige reguleringsformål har man derfor hidtil måttet anvende ventiler, der styres direkte af en termo- 2 146637 stat eller pressostat. Dette medfører, at ventilen eller det reguleringsorgan, som bestemmer dennes ventilkarakteristik, må udskiftes, hvis man skal benytte en styreventil med en anden ventilkarakteristik. Tilsva-5 rende er man nødt til at udskifte hele termostaten eller pressostaten, hvis man ønsker en styreventil med et andet proportionalitetsbånd. Det er også nødvendigt at anvende en termostat eller pressostat med stor lukkekraft, når ventilen har stort gennemstrømningsareal, og 10 eller når trykfaldet over ventilen er stort.Therefore, for actual control purposes, valves controlled directly by a thermostat or pressure switch have so far been used. This means that the valve or regulator that determines its valve characteristics must be replaced if a control valve with a different valve characteristic is to be used. Similarly, if you want a control valve with a different proportionality band, you have to replace the entire thermostat or pressure switch. It is also necessary to use a thermostat or pressure switch with high closing force when the valve has a large flow area and 10 or when the pressure drop across the valve is large.
Opfindelsen har til formål at eliminere diskontinuiteten i den pilotstyrede ventils ventilkarakteristik, således at ventilen kan reguleres jævnt fra fuldt åben til fuldt lukket tilstand eller omvendt uden diskontinu-15 ert spring ved førnævnte kritiske åbningsgrad.The invention aims to eliminate the discontinuity of the valve characteristics of the pilot-controlled valve so that the valve can be regulated smoothly from fully open to fully closed state or vice versa without discontinuous jump at the aforementioned critical opening degree.
Dette opnås ifølge opfindelsen ved, at den indledningsvis angivne styreventil er ejendommelig ved det i krav lrs kendetegnende del angivne. Ved at pilotventilens ventiltallerken og reguleringsorganer har en fælles akse 20 og er fastholdt i forhold til hinanden i aksial retning, opnås en veldefineret styring af reguleringsorganet i forhold til åbningen, således at en for tidlig lukning af hovedventilens ventilkegle undgås.This is achieved according to the invention by the fact that the control valve indicated at the beginning is characterized by the characteristic part of claim 1. By having the pilot valve valve plate and regulating means have a common axis 20 and being held in relation to each other in axial direction, a well-defined control of the regulator relative to the opening is obtained, so that premature closing of the valve of the main valve is avoided.
Krav 2 angiver en udførelsesform, ved hvilken pilot-25 ventilens ventilspindel og -tallerken og reguleringsorganet danner et fælles sammenhængende legeme.Claim 2 discloses an embodiment in which the pilot spindle of the pilot valve and the plate and the regulating member form a common continuous body.
Krav 3 angiver en foretrukken udførelsesform, ved hvilken reguleringsorganet kan udskiftes uafhængigt af udskiftning af pilotventilen og omvendt. Den angivne tryk-30 fjeder tjener desuden til at holde de bevægelige dele i 146637 3 veldefinerede positioner under hele reguleringsforløbet.Claim 3 discloses a preferred embodiment in which the regulating means can be replaced independently of the pilot valve replacement and vice versa. In addition, the specified spring pressure serves to hold the moving parts in well-defined positions throughout the control process.
Opfindelsen skal i det følgende nærmere beskrives med henvisning til tegningen, hvorpå; 5 fig. 1 viser et længdesnit gennem en første udførelsesform for en styreventil ifølge opfindelsen i lukket tilstand, fig. 2 viser et længdesnit gennem den i fig. 1 viste styreventil i delvis åben tilstand, fig. 3 viser et længdesnit gennem en anden udførelses-10 form for en styreventil ifølge opfindelsen i lukket tilstand, og fig. 4 viser et længdesnit gennem den på fig. 3 viste styreventil i delvis åben tilstand.The invention will now be described in more detail with reference to the drawing, in which; 5 FIG. 1 is a longitudinal section through a first embodiment of a closed valve control valve according to the invention; FIG. 2 shows a longitudinal section through the one shown in FIG. 1 in the partially open state, FIG. 3 is a longitudinal section through a second embodiment of a closed valve control valve according to the invention; and FIG. 4 shows a longitudinal section through the one shown in FIG. 3 in the partially open state.
Den på fig. 1 og 2 viste styreventil har et ventilhus 15 1 med en tilgangsside 2 og en afgangsside 3 for en fluidumstrøm, som ledes gennem styreventilens hoved-ventildel, som består af et i ventilhuset 1 fastgjort ventilsæde 4 og en på en ventilspindel 5 fastgjort ventilkegle 6. Hovedventildelen er på fig. 1 vist i luk-20 ket tilstand og på fig. 2 i åben tilstand.The FIG. 1 and 2, a valve housing 15 1 has an inlet side 2 and a discharge side 3 for a fluid flow which is passed through the main valve portion of the control valve, which consists of a valve seat 4 fixed in the valve housing 1 and a valve cone 6 fixed to a valve stem 5. The main valve part is in FIG. 1 shown in closed condition and in FIG. 2 in the open state.
Ventilhuset 1 har en styrebøsning 7 for hovedventilens ventilspindel 5» som indeholder fire i rundtgående retning fordelte åbninger eller huller 9» som forbinder tilgangssiden 2 med det indre af ventilspindelen 5. Des-25 uden har ventilspindelen 5 fire andre i rundtgående retning fordelte åbninger eller huller 10, som forbinder dens indre 8 med et mellemkammer 11, som for oven er lukket af et aktuatorhus 12 ved hjælp af en pakning 13.The valve housing 1 has a guide sleeve 7 for the main valve valve spindle 5 "which contains four orifices or holes 9" which connect the inlet side 2 with the interior of the valve stem 5. Furthermore, without the valve spindle 5, four other orifices or holes are distributed in the circumferential direction. 10, which connects its interior 8 with an intermediate chamber 11, which is closed above by an actuator housing 12 by means of a gasket 13.
En stempelplade 14, som ikke slutter tæt til mellemkamme- 4 U6637 rets 11 sider, og som har større areal end ventilkeglen 6, er fastgjort vinkelret på ventilspindelen 5 ved hjælp af en møtrik 15.A plunger plate 14 which does not close close to the 11 sides of the intermediate chamber and which has a larger area than the valve cone 6 is fixed perpendicular to the valve stem 5 by means of a nut 15.
Randen af stempelpladen 14 er forbundet med et med 5 nævnte rand koncentrisk fremspring på den underste del af aktuatorhuset 12 ved hjælp af en lufttæt bælg 17, hvis indre udgør et styrekammer 18.The rim of the piston plate 14 is connected to a concentric projection mentioned by 5 on the lower part of the actuator housing 12 by means of an airtight bellows 17, the interior of which forms a control chamber 18.
Aktuatorhuset indeholder en deri indskruet pilotventil 19, som har en ventilspindel 20 samt en ventil-10 tallerken eller ventilkegle 21 samt et ventilsæde 22. Ventilspindelen 20 omsluttes af en trykfjeder 23 samt en bælg 24, som omgives af et hydraulisk trykoverførende medium 25; som kan tilføres fra et hydraulikrør 26. Pilotventilen har en kanal 27, som via en anden kanal 15 28 i huset 1 står i forbindelse med styreventilens af gangsside 3.The actuator housing includes a pilot valve 19 screwed in there which has a valve spindle 20 and a valve 10 plate or valve cone 21 and a valve seat 22. The valve spindle 20 is surrounded by a pressure spring 23 and a bellows 24 which is surrounded by a hydraulic pressure transfer medium 25; which can be supplied from a hydraulic pipe 26. The pilot valve has a channel 27 which, via a second channel 15 28 in the housing 1, communicates with the control valve of the aisle side 3.
Hovedventilens ventilstamme 5 indeholder et denned koncentrisk reguleringsorgan 29 med en kegleformet opad tilspidset kontur, som rager gennem og danner luk-20 ke for en åbning 30 i møtrikken 15, som udgør styrekammerets 18 bevægelige væg. En trykfjeder 31 holder ved fjederens kraft reguleringsorganets øverste ende 32 i anlæg mod pilotventilens ventiltallerken 21. Reguleringsorganet 29, som er anbragt koncentrisk i hovedven-25 tilens ventilsæde 5? er desuden koncentrisk med pilotventilens 19 ventilspindel 20 og ventiltallerken 21.The valve stem 5 of the main valve includes a concentric regulating means 29 with a cone-shaped upwardly tapering contour which projects through and forms a closure for an opening 30 in the nut 15 which constitutes the movable wall of the control chamber 18. A thrust spring 31 holds, by the force of the spring, the upper end 32 of the regulating means against the pilot valve valve plate 21. The regulating means 29 located concentrically in the valve seat 5 of the main valve 25? is also concentric with the valve spindle 20 of the pilot valve 19 and the valve plate 21.
I stedet for bælgen 17 kunne stempelpladen 14 være udformet som et i det væsentlige tætsluttende stempel i mellemkammeret 11 eller være omgivet af en med mellem-30 kammerets væg tætsluttende membran.Instead of the bellows 17, the piston plate 14 could be formed as a substantially tightly sealed piston in the intermediate chamber 11 or surrounded by a tightly sealing membrane with the wall of the intermediate chamber.
Pilotventilens ventilspindel 20 og ventiltallerken 21 kunne være fremstillet i ét stykke med reguleringsorganet 29, hvorved trykfjederen 31 ville kunne undværes.The valve stem 20 of the pilot valve and the valve plate 21 could be made integrally with the regulator 29, whereby the spring 31 could be avoided.
146637 5146637 5
Den på fig. 1 viste styreventil virker på følgende måde:The FIG. The control valve shown in Fig. 1 works as follows:
Med styreventilen i den på fig. 1 viste stilling kan en fluidumstrøm ikke passere igennem fra tilgangssiden 2 til afgangssiden 3, men der vil derimod blive opbyg-5 get samme tryk i styrekammeret 18 som på styreventilens tilgangsside 2 som følge af, at trukfluidet fra tilgangssiden 2 gennem hullerne 9 trænger op gennem den delvis lukkede åbning 30 omkring reguleringsorganet 29 og siver ind i styrekammeret 18. De lige store tryk på hver 10 side af stempelpladen 14 virker med lige store, men modsat rettede kræfter og ophæver derfor hinanden, medens den resulterende kraft imod ventilspindelen 5 bevirker, at ventilkeglen 6 presses imod ventilsædet 4, hvorved hovedventildelen fortsat holdes lukket.With the control valve shown in FIG. 1, a fluid flow cannot pass through from the inlet side 2 to the outlet side 3, but the same pressure will be built up in the control chamber 18 as on the inlet side 2 of the control valve due to the pull fluid from the inlet side 2 through the holes 9 penetrating through the partially closed aperture 30 around the regulator 29 and seeps into the control chamber 18. The equal pressures on each side of the piston plate 14 act with equal but opposite forces and therefore cancel each other, while the resulting force against the valve spindle 5 causes the the valve cone 6 is pressed against the valve seat 4, whereby the main valve portion remains closed.
15 Styreventilen åbnes ved hjælp af pilotventilen 19, idet trykket i hydraulikfluidet 25 omkring bælgen 24 sænkes, så trykfjederen 23 kan løfte ventilspindelen 20 og ventiltallerkenen 21 fra sædet 22. Herved kan der ske en fluidumstrømning fra styrekammeret 18 gennem pilotventilen 20 22 til afgangssiden 3. Herunder falder trykket i styre kammeret 18, og stempelpladen 14 med ventilspindelen 5 og ventilkeglen 6 bevæger sig derfor til en balanceposition, hvor fluidumstrømmen gennem åbningen 30 er den samme som gennem pilotventilen 19, og samtidig vil der 25 blive åbnet for en fluidumstrøm gennem hovedventildelen gennem arealet imellem ventilsædet 4 og ventilkeglen 6.The control valve is opened by means of the pilot valve 19, as the pressure in the hydraulic fluid 25 around the bellows 24 is lowered, so that the compression spring 23 can lift the valve stem 20 and the valve plate 21 from the seat 22. A fluid flow from the control chamber 18 through the pilot valve 20 22 to the discharge side 3 can be effected. Below, the pressure in the control chamber 18 falls, and the piston plate 14 with the valve spindle 5 and the valve cone 6 therefore moves to a balance position, where the fluid flow through the opening 30 is the same as through the pilot valve 19, and at the same time 25 a fluid flow through the main valve part through the area between the valve seat 4 and the valve cone 6.
Hvis man ønsker en anden ventilkarakteristik, kan man blot udskifte pilotventilens ventilkegle med en ny ventilkegle med en anden slibning af den koniske del sva-30 rende til den ønskede karakteristik.If you want a different valve characteristic, you can simply replace the pilot valve valve cone with a new valve cone with a different grinding of the conical part corresponding to the desired characteristic.
Hvis man derimod ønsker et andet proportionalitetsbånd, kan man udskifte reguleringsorganet 29 med et andet reguleringsorgan, hvis koniske del har en anden konusvinkel.On the other hand, if a different proportionality band is desired, the regulating means 29 can be replaced by another regulating means, the conical part of which has a different cone angle.
146637 6146637 6
Fig. 2 viser som nævnt den på fig. 1 viste ventil i delvis åben tilstand. Såfremt bælgen 17 i den på fig. 1 og 2 viste styreventil bliver utæt, vil trykket i styrekammeret 18 stige, fordi det fulde tilfør-5 selstryk via hullerne 10 omgiver bælgen 17. Dette med-° fører, at styreventilen automatisk søger imod lukke tilstanden. Dette er en sikkerhed for, at utilsigtede tilstande ikke kan opstå som følge af fejl ved bælgen 17.FIG. 2, as mentioned in FIG. 1 in partially open condition. If the bellows 17 in the embodiment of FIG. 1 and 2 become leaky, the pressure in the control chamber 18 will increase because the full supply pressure via the holes 10 surrounds the bellows 17. This means that the control valve automatically seeks to close the condition. This is a certainty that unintended conditions cannot occur as a result of malfunction of the bellows 17.
Fig. 3 og 4 viser en anden udførelsesform for styre-10 ventilen ifølge opfindelsen, vist henholdsvis i lukket og i åben tilstand. Heri er de tilsvarende dele blevet betegnet med samme henvisningstal som på fig. 1 og 2, men med et mærke.FIG. 3 and 4 show another embodiment of the control valve according to the invention, shown in closed and open condition respectively. Herein, the corresponding parts have been designated by the same reference numerals as in FIG. 1 and 2, but with a mark.
Den på fig. 3 og 4 viste styreventil afviger i det væ-15 sentlige kun fra den på fig. 1 og 2 viste styreventil ved, at tilgangstrykket på ventilens tilgangsside 2* virker på undersiden af hovedventildelens ventilkegle 6*. Mellemkammeret 11* befinder sig i denne udførelses-form imellem kanalerne 27’ og 28’, og står derfor i 20 forbindelse med styreventilens afgangsside 3' og ikke dens tilgangsside som i den på fig. 1 og 2 viste udførelsesform. Derfor vil utilsigtede åbninger i bælgen 17*- i den på fig. 3 og 4 viste udførelsesform bevirke, at trykket i styrekammeret 18* falder ved fluidumstrøm-25 ning fra styrekammeret 18* gennem nævnte huller i bælgen 17’ til afgangssiden 3*. Derved vil styreventilen blive yderligere åbnet, hvilket betyder, at denne udførelsesform opfører sig mindre heldigt ved fremkomsten af en sådan fejl end den på fig. 1 og 2 viste udførel-30 sesform. Det må desuden anføres, at styrekammeret 18’ i denne anden udførelsesform skal være absolut tæt, således at den eneste fluidumstrøm fra dette styrekammer 18* foregår på kontrolleret måde igennem pilotventilen 19*.The FIG. The control valve shown in Figures 3 and 4 differs substantially only from that of FIG. 1 and 2, the inlet pressure on the inlet side of the valve 2 * acts on the underside of the valve cone 6 * of the main valve part. The intermediate chamber 11 * is in this embodiment between the channels 27 'and 28', and therefore communicates with the outlet side 3 'of the control valve and not its inlet side as in the one shown in FIG. 1 and 2. Therefore, unintended openings in the bellows 17 * in the embodiment of FIG. 3 and 4, cause the pressure in the control chamber 18 * to decrease by fluid flow from the control chamber 18 * through said holes in the bellows 17 'to the outlet side 3 *. Thereby, the control valve will be further opened, which means that this embodiment behaves less successfully upon the occurrence of such an error than that of FIG. 1 and 2. In addition, it must be stated that in this second embodiment the control chamber 18 'must be absolutely sealed so that the only fluid flow from this control chamber 18 * is conducted in a controlled manner through the pilot valve 19 *.
Claims (3)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK286180A DK146637C (en) | 1980-07-02 | 1980-07-02 | CONTROL VALVE FOR REGULATING A FLUIDUM FLOW THROUGH A MAIN VALVE PLACED BETWEEN THE CONTROL VALVE ACCESS AND EASY SIDE |
| DE19813125605 DE3125605A1 (en) | 1980-07-02 | 1981-06-30 | CONTROL VALVE |
| GB8120301A GB2079983B (en) | 1980-07-02 | 1981-07-01 | Pilot operated control valve |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK286180A DK146637C (en) | 1980-07-02 | 1980-07-02 | CONTROL VALVE FOR REGULATING A FLUIDUM FLOW THROUGH A MAIN VALVE PLACED BETWEEN THE CONTROL VALVE ACCESS AND EASY SIDE |
| DK286180 | 1980-07-02 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK286180A DK286180A (en) | 1982-01-03 |
| DK146637B true DK146637B (en) | 1983-11-21 |
| DK146637C DK146637C (en) | 1984-04-30 |
Family
ID=8116526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK286180A DK146637C (en) | 1980-07-02 | 1980-07-02 | CONTROL VALVE FOR REGULATING A FLUIDUM FLOW THROUGH A MAIN VALVE PLACED BETWEEN THE CONTROL VALVE ACCESS AND EASY SIDE |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3125605A1 (en) |
| DK (1) | DK146637C (en) |
| GB (1) | GB2079983B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2532033B1 (en) * | 1982-08-17 | 1986-03-14 | Gemignani Andre | PILOTED SAFETY VALVE |
| EP0180248B1 (en) * | 1982-10-28 | 1989-12-13 | LUCAS INDUSTRIES public limited company | Valve arrangement |
| AT385572B (en) * | 1984-12-21 | 1988-04-25 | Andritz Ag Maschf | ADJUSTMENT CONTROL DEVICE |
| CN106838415B (en) | 2015-02-16 | 2022-08-12 | 艾欧史密斯(中国)热水器有限公司 | Proportional valve body and proportional valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE270220C (en) * | 1900-01-01 | |||
| DE260137C (en) * | 1900-01-01 |
-
1980
- 1980-07-02 DK DK286180A patent/DK146637C/en not_active IP Right Cessation
-
1981
- 1981-06-30 DE DE19813125605 patent/DE3125605A1/en active Granted
- 1981-07-01 GB GB8120301A patent/GB2079983B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE3125605A1 (en) | 1982-04-15 |
| DE3125605C2 (en) | 1989-07-20 |
| DK286180A (en) | 1982-01-03 |
| GB2079983A (en) | 1982-01-27 |
| DK146637C (en) | 1984-04-30 |
| GB2079983B (en) | 1984-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |