CN1023509C - Valve assembly - Google Patents
Valve assembly Download PDFInfo
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- CN1023509C CN1023509C CN 89102981 CN89102981A CN1023509C CN 1023509 C CN1023509 C CN 1023509C CN 89102981 CN89102981 CN 89102981 CN 89102981 A CN89102981 A CN 89102981A CN 1023509 C CN1023509 C CN 1023509C
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- hole
- valve body
- foreskin
- fluid
- container
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Abstract
The present invention relates to a valve component which comprises a valve body and an elastic wrapper, wherein the outer surface of the valve body is coated by the elastic wrapper from the lateral surface, and the end of the elastic wrapper is sealed on the valve body. An input channel extends from one end of the valve body along the long and thin direction to receive liquid from a container. An output channel is positioned at the other end in the long and thin direction to discharge the liquid from the input channel. At least one hole from the input channel opens into the outer surface of the valve body so as to cause the liquid to flow between the outer surface and the wrapper and expand the wrapper. The liquid between the valve body and the wrapper finally flows into at least one other hole which inwards opens into the output channel so as to be discharged. The wrapper prevents the liquid from flowing back from the output channel to the container.
Description
The present invention relates to a kind ofly be used for from container (for example flexible container) exhaust fluid and prevent that dirt from entering the valve assembly of container by it.Valve assembly comprises an elongated valve body, and an elasticity foreskin of capping valve outer surface is from the side arranged on the valve body.Fluid stream process valve body enters the space between valve outer surface and the elasticity foreskin.Then, fluid stream returns valve body inwardly and flows out valve body by output or discharge passage.
When outwards distributing sterile fluid from a container (also will continue a period of time the working life of container), the very important point is to prevent that contaminated stream is back in the container in batch operation or afterwards.The pollutant that comes from outside valve assembly and the container comprises microorganism, atmospheric composition, moisture, dust or the like.If sterile fluid is contaminated, its quality, effectiveness even Security are affected.
The back did not re-use in a long period if a sterile fluid container uses once, and the pollution problem that flows into container does not generally exist.In disclosed a kind of known liquid disposal container in the U. S. Patent 2,715,980 of Frick, valve system comprises that one has central hole that passes valve body and the valve body that extends to some holes of its outer surface from central hole.An expandable cover, the cover of rubber type of material for example, the outer surface that encases valve body stops fluid to go out from Zhi Kongliu.When wanting distributing fluids, fluid flows through central hole, by a hole cover is expanded then, and fluid just can flow out from an end of cover.In this flowed, pollutant may flow into the inflating end of cover, and then by a hole and a central hole, was back to container.Can not stop contaminated stream to enter container effectively.
The valve that another kind is furnished with spring tube or cover is disclosed in the U. S. Patent 4,346,704 of Kulle.A kind of mother solution by by mesotube or channel allocation to the hole of propping up that fluid is sent to elastic sleeve or pipe internal surface.When fluid is under pressure, make the spring tube displacement, allow outwards to flow to cover and hold from the fluid branches hole.The device of Kulle for disposable use design, for example distributes anesthetic at first.Because therefore disposable use does not exist pollutant to be back to the problem of container.The high velocity, low pressure that is intended that of the device of Kulle transmits anesthetic so that can accurately distribute it.
Therefore, main task of the present invention provides a kind of dispense liquid easily and can prevent that again any pollutant is back to container valve assembly in the container that remaining liq is housed by it.
According to the present invention, valve assembly comprises an axial elongated valve body, and it has an entrance point that separates along its length, an outlet end.Valve body has a shell surface, is with an elasticity foreskin on it, seals from the side and inwardly overlays on the outer surface.An input channel is extended a segment distance from entrance point along direction of elongate.One or more holes or subchannel extend radially outwardly into the outer surface of valve body with respect to direction of elongate from input channel.On the direction of valve outlet end, substantially radially inwardly extend to the output channel of extending along direction of elongate from outer surface one or more holes or subchannel.The other end of output channel is positioned at the outlet end of valve body.
When valve assembly did not use, elasticity foreskin hard-pressed bale stoped any backflow of getting back to container by output channel on valve outer surface.If pressure acted on force the fluid into input channel on the container, fluid flows to the hole of outwards leading to the elasticity foreskin from input channel.The pressure of fluid opens elasticity foreskin outward radial, makes in the hole that fluid flows to output channel is connected between valve outer surface and the foreskin.The reaction force that acts on pressure on the fluid and elasticity foreskin forces fluid to flow out output channel.In case fluid flows into the hole that links to each other with output channel, the elasticity foreskin just restores to the original state, and encases valve body tightly and stops any fluid that enters the space between valve body and the foreskin from the hole that links to each other with output channel to flow.Therefore, can prevent backflow, guarantee that pollutant does not enter container and influences quality, effectiveness or the bacterium property of fluid to container.
In a preferred embodiment, valve body is elongated in the direction that flows out from container.One end, valve body have an input channel of extending and be positioned at substantially the valve body center along direction of elongate.In great majority are used, have only an output channel, and, a plurality of input channels can be arranged according to the characteristic of the fluid that is assigned with.
At an end of the valve body of input channel, promptly relative with that end of accepting fluid from a container end has one or more and the angled hole that extends radially outwardly into valve outer surface of valve body direction of elongate.Though can preferably have a plurality of holes spaced apart only with a hole, so that the fluid that outwards flows to inflation foreskin in the elasticity foreskin is evenly announced by several angle.
On direction of elongate, be sent on the position that the hole in the elasticity foreskin separates with those fluids, also has the other hole, (their quantity is identical usually) is used to make liquid inwardly to flow to the output channel of extending along the valve body direction of elongate and flows out that end that outwards leaves container on the valve body.In other words, an end that leaves the output channel in hole forms the discharge end of valve body.
In order to make valve body easily and to improve the efficient that fluid flows through valve body, the cross section in these passages and hole is preferably complete.Their cross section can be circular or oval-shaped.
Pressure when flowing through valve body according to the elastic characteristic of foreskin and the fluid that will distribute can be joined a rigid cylinder shape part in elasticity foreskin outside, with the restriction foreskin from the degree of valve outer surface to outer displacement.
Valve assembly can be used for multiple container, is best suited for a kind of compressible flexible container, as plastic bag, foldable pleating plastic container, stove wind-box shape container or the like.Bellow type container is disclosed in the U. S. Patent 4,526,296 of the U. S. Patent 3,506,163 of Rauh etc. and Berger etc.The obviously relevant place with the present invention of these distribution container only is the degree of can convection cell exerting pressure, and this pressure makes fluid pass through valve body inflation elasticity foreskin so that fluid arrives outlet end by valve body.
This valve assembly can be used for distributing the material of various viscosity, comprises liquid, lotion, gel, powder, gas or the like.Multiple product can be stored and provide to distribution container, as food, medicine preparation, makeup, industrial chemical, developing solution, binder, pigment or the like.
A distinguishing feature of the present invention be elasticity foreskin and valve body or with parts that valve body is connected between sealing is arranged.Need sealing to guarantee flowing to the delivery outlet of output channel to realize the distribution of fluid to the liquid that leads to valve outer surface and the elasticity foreskin from input channel.If the one or both ends of foreskin are freely, the liquid that is assigned with will run off, and pollutant can enter hole and passage and finally enter container.The end of foreskin can seal with multiple mode, as: connect or chemical affixed grip is fixed on the valve body with O shape ring, binder or with thermosetting, or on the parts that are attached thereto.The foreskin two ends engage with valve seal, and the fluid stream that leads between foreskin and the valve outer surface can only flow out by delivery outlet and output channel.Therefore, in batch operation, do not have fluid loss.In addition, the elastic characteristic of foreskin also guarantees to provide a kind of sealing on the aperture of leading to the foreskin internal surface, thereby stops contaminant stream to enter container by hole and the input channel that links to each other with input channel.
Multiple material can be used for making valve body and elasticity foreskin, and these materials are compatible with the fluid that is distributed and the degerming method of convection cell.If use high hot degerming method, selected material must keep its integrity in the temperature range of degerming with in the required time durations of degerming.Can use the additive method degerming, as irradiation, ethylene oxide etc.
Because valve assembly of the present invention can prevent any contaminated stream and enter distribution container, so need not add preservative, use preservative to raise the cost, influence the product effect, or harmful side effect.
In improvement of the present invention, noticed that entering distribution container such as the such pollutant of microorganism will develop into very big colony in a short period.The present invention has been carried out test and definite, this valve assembly can prevent that any this contaminated stream from entering container, and therefore the fluid that is assigned with can be stored the long period and can not produce owing to pollutant enters any adverse effect that container produces after distributing for the first time.
In a kind of typical embodiment, foldable container is made with polyolefin, valve body is made with teflon, its external diameter is 0.5 inch, the elasticity foreskin is made with synthetic rubber, its Shore (Shore) hardness is 50, internal diameter is 0.375 inch, external diameter is 0.405 inch, the elasticity foreskin is outer can to center on a rigidity foreskin, its internal diameter is 0.530 inch, is just strutted when the elasticity foreskin is enclosed within on the valve body to guarantee required contacting with the tight of valve outer surface, so that valve assembly stops contaminated stream when not using.Can also take ripple glue (gutta-percha) manufacturing with natural rubber and Gu.
The various new feature that makes the present invention have unique features provides in appending claims and constitutes a part of this disclosure.In order to understand the present invention better, its service advantages and the purpose of using it to reach should with reference to the accompanying drawings and illustrate, in these parts embodiments of the invention are illustrated and narrate.
Fig. 1 constitutes the stereogram that is contained in a valve assembly in the bellow type flexible container of the present invention.
Fig. 2 is the longitudinal section of an embodiment of valve assembly among Fig. 1.
Fig. 3 a is the sectional elevation along 3a-3a line among Fig. 2.
Fig. 3 b is the sectional elevation along 3b-3b line among Fig. 2.
Fig. 3 c is the sectional elevation along 3c-3c line among Fig. 2.
Fig. 3 d is the sectional elevation along 3d-3d line among Fig. 2.
Fig. 4 is the view similar to Fig. 2, in the valve assembly surrounded rigidity tubular spare is arranged.
Fig. 5 is the longitudinal sectional view of another embodiment of the present invention.
Fig. 6 is the sectional elevation along VI among Fig. 5-VI line.
Fig. 7 is another embodiment's similar to Fig. 5 a view.
Fig. 8 is the sectional elevation along VIII among Fig. 7-VIII line.
Fig. 9 a be contained in the valve assembly of the present invention on the stove bellows flexible container stereogram and
Fig. 9 b is the elevation view after Fig. 9 a rotates 90 °.
Among Fig. 1, shown bellow type flexible container 10 and the valve assembly 12 that is contained in container one end, the structure of valve assembly 12 makes that liquid wherein can be told when container 10 is compressed.
Fig. 2 has shown an embodiment of valve assembly 12, and it comprises an elongated valve body 14 that extends between entrance point 16 and outlet end 18.When valve body 14 is set on the distribution container, entrance point 16 communicates with internal tank.
Elasticity foreskin 28 surrounds outer surface 14a and tightly encases outer surface basically.As shown in Figure 2, the elasticity foreskin is from extending near the entrance point 16 of valve body near the outlet end 18, and each end of foreskin 28 all is enclosed on the outer surface 14a of valve body to being provided with along valve body length.Shown in Fig. 3 a, 3b and 3d, when being placed on the valve body, foreskin 28 is tightened up, so that tightly encase valve body, thus form the perforate hole closure that leads to valve body 14 outer surfaces of mouth 22,24.
As shown in Figure 2, foreskin is fixed on the outer surface of valve body 14 by the O shape ring 30 in the groove 32 of seat on valve body 14 outer surfaces.Being used for the skin-deep mode to two ends of sealed packet can change according to the characteristic of material type and the fluid that is assigned with.Except that O shape ring 30, also available heat or chemical consolidation method or use binder seal up foreskin.
If the container among Fig. 1 10 is squeezed or is compressed on its length direction, the material that wherein holds will enter valve body 14 by input channel 20 earlier, flows out by valve assembly 12 then.When fluid flows out input channel 20, the hole and the radially outward that just enter among four holes 22 flow to valve outer surface 14a.The pressure of fluid forces foreskin 28 outwards to expand, and fluid is flowed between valve outer surface 14a and elasticity foreskin internal surface, makes in the hole 24 that fluid radially inwardly flows one up to arriving another group.24 fluid is discharged from valve assembly by output channel from the hole.
When not having fluid to pass through in the valve assembly 12, elasticity foreskin 28 just becomes the closure in hole 22,24 on valve body 14 outer surfaces.As a result, prevent that foul from blowing back into container from valve assembly.When fluid expanded foreskin 28, fluid just can stop foul to enter container.In case fluid arrives hole 24, the elasticity foreskin will shrink and seal the hole 24 on the valve body 14 outer surface 14a, thereby prevents that fluid from refluxing to container through output channel 26.
Among Fig. 4, the structure of valve assembly is similar to Fig. 2's, yet, the elasticity foreskin slightly outside a bit, be surrounded by an elongated rigid cylinder spare 34.Cylindrical piece 34 has retrained the radially outward turgor movement of foreskin 28.If the expansion of foreskin has out of control tendency, then cylindrical piece 34 can limit its outside motion.34 of cylindrical pieces just need in specific occasions, and it is not the requisite element of this valve component.
Fig. 5 and Fig. 6 have shown another embodiment of the present invention.Valve assembly 112 has a valve body 114, and it has an entrance point 116 and an outlet end 118.Valve body 114 is elongated on import one Way out.
Valve body has an input channel 120, and the length that it extends from entrance point 116 approximates 1/4 of length between the valve body two ends greatly.Different with Fig. 2,3 and 4 embodiment, have only a hole 122 to extend inward into the outer surface 114a of valve body from the entrance point 116 of input channel 120.A radially relative side on valve body, another hole 124 radially extends to the inner of output channel 126 from outer surface.The opening in the hole 122,124 on the valve outer surface separates on direction of elongate.The layout of this uniqueness can be linked up from prevent that producing flows between the outer surface 114a of elasticity foreskin 128 and valve body 114.Therefore, the fluid that produces in hole 122 flows between outer surface 114a and foreskin 128 around valve body run-in-hole 124.
As shown in Figure 5, two opposite ends of elasticity foreskin are shut on the outer surface 114a of valve body 114 by O shape ring 130.
Among Fig. 6, hole 122 is between entrance point and outlet end.In addition, elasticity foreskin 128 hard-pressed bales are sealed hole 122,124 on the appearance 114a of valve body 114.The working method of valve assembly 112 is basic identical with the working method of valve assembly 12 of band foreskin 28, has only when fluid to be pressed into input channel 120 from container so that by when walking around valve body and enter output channel 126, elasticity foreskin 128 just expands outwardly.
Fig. 7 and Fig. 8 have shown another embodiment of the present invention.Different with aforementioned each embodiment, present embodiment has a valve assembly 212, and it comprises an elongated valve body 214.Valve body extends on the length direction between entrance point 216 and the outlet end 218.Different with Fig. 5 and 6, valve assembly 212 has two holes 222, outwards tells from the dirty end of input channel 220.Two holes 222 are separated by 180 ° and are provided with, and all extend to the outer surface 214a of valve body.Separate some distances with hole 222 on the outer surface, have other pair of holes 224 to extend internally and end at downstream or the inner of output channel 226 from outer surface.In Fig. 7, hole 222 and 224 seems in fact in this figure hole 224 have been rotated 90 ° to hole 222 in a plane, so that obtain identical effect among the embodiment with Fig. 5 and 6, that is, the fluid that prevents to flow through valve assembly produces links up.
An elasticity foreskin 228 is encasing valve outer surface near the entrance point 216 from the side between near the outlet end 218, covered the hole 222,224 on the valve outer surface.The same with aforementioned each embodiment, the two ends of elasticity foreskin 228 are enclosed on the outer surface of valve body 214 by O shape ring 230.O shape ring crouches in the groove 232.As previously mentioned, also available other modes are the end of foreskin fixedly, so that do not walked around hole 224 bypasses of leading to output channel 226 by the fluid that distributes by valve assembly.
As can be seen from Figure 8, each aperture is to relatively.Other 224 holes to that indicated in the drawings, hole are separated by 90 °.
Fig. 9 a and 9b demonstrate container 310 with valve assembly 312, and valve assembly becomes to cross out with short transverse in container head.Wall of a container is stove bellows forms, sees Fig. 9 a, so side is pressed mutually inwards, just can pass through valve assembly 312 distributing fluids.
Though shown certain embodiments and be described in detail the application of inventive principle, should be appreciated that, under the situation that does not deviate from these principles, can also implement the present invention with other modes.
Claims (24)
1, a kind of liquid dispensing assembly, comprise that a container and one are from the container distributing fluids and prevent to occur fluid distributes or after distributing the distributing valve that foul refluxes to container, this container has an outlet, and when exerting pressure, the fluid in container can therefrom discharge fluid, it is characterized in that this distributing valve comprises an outer surface that the elongated valve body of the entrance point that separates and outlet end is arranged and extend along direction of elongate in direction of elongate between entrance point and outlet end, this entrance point links to each other with container mouth and flows from the fluid of container so that accept, input channel in valve body, its first end is at the entrance point of this valve body, and second end separates towards this valve outlet extreme direction and this first end, this input channel is used for accepting fluid from container, in this valve body, have at least one from second end of this input channel by this valve body to first hole that outer surface extends and opens, output channel in valve body, its first end is positioned near this valve outlet end, and its second end is separating with this first end on the direction of this valve body entrance point, in this valve body, have at least one to extend and open-minded to the outer surface of this valve body from second end of this output channel, and second hole that separates with the opening in this first hole, an elasticity foreskin encases outer surface and this first hole of extend through and this second hole of this valve body from the side, form the closure in this first hole and this second hole, the internal diameter of this elasticity foreskin before wrapping on this valve body is less than the external diameter of this valve body, thereby foreskin be stretched and hard-pressed bale on this valve body, this elasticity foreskin is in the primary importance of sealing this first hole and second hole on the valve outer surface and outwards separate between the second place with this first hole and second hole can resiliently deformable, flow through fluid that this input channel enters this first hole and enter between this valve outer surface and this foreskin and flow to this second hole betwixt and discharge to this output channel and then from first end of this output channel by this second orifice flow subsequently so that make, this elasticity foreskin is crossed on the direction of this valve body and is flow through in the downstream in this first hole on the direction of this valve body and combines with this valve seal in the upstream flow in this second hole, so that enter fluid between this outer surface of this valve body and this foreskin only by this first and second hole.
2, fluid dispensing subassembly as claimed in claim 1, wherein this valve body has central axis and a plurality of this first hole and this second hole of extending along direction of elongate, and this first hole and this second hole separate around central axis angledly.
3, fluid dispensing subassembly as claimed in claim 2, wherein the quantity in this first hole and this second hole equates, and this first hole distributes around the central axis equal angles with this second hole.
4, fluid dispensing subassembly as claimed in claim 1, this input channel wherein, output channel, first and second holes are limited by the curvilinear surface of horizontal expansion respectively.
5, fluid dispensing subassembly as claimed in claim 4, its this input channel, output channel, the cross section of first and second passages is circular.
6, fluid dispensing subassembly as claimed in claim 1, wherein this elasticity foreskin is that synthetic rubber is made.
7, fluid distributor as claimed in claim 1, wherein this elasticity foreskin is that natural rubber is made.
8, fluid dispensing subassembly as claimed in claim 1, wherein this elasticity foreskin is taken ripple glue (gutta-percha) by Gu and is made.
9, fluid dispensing subassembly as claimed in claim 1, wherein this elasticity foreskin is made by flexible plastic material.
10, fluid dispensing subassembly as claimed in claim 1, wherein each end that separates on direction of elongate of this elasticity foreskin all has an O shape ring, and makes the outer surface sealing engagement of this elasticity foreskin and this valve body.
11, fluid dispensing subassembly as claimed in claim 1, wherein this elasticity foreskin all is on the outer surface of heat-sealing at this valve body at the relative end that direction of elongate separates.
12, fluid dispensing subassembly as claimed in claim 1, wherein this elasticity foreskin is chemically to be fixed on this valve outer surface in the relative end that direction of elongate separates.
13, fluid dispensing subassembly as claimed in claim 1, wherein this elasticity foreskin is to be bonded on the outer surface of this valve body in the relative end that direction of elongate separates.
14, fluid dispensing subassembly as claimed in claim 1 wherein leads to this first hole of this valve outer surface with from this valve outer surface from this input channel and leads to this second hole of this output channel and this first hole and second hole positioned opposite radially on this valve body.
15, fluid dispensing subassembly as claimed in claim 1, wherein two these first holes radially relatively stretch out from this input channel, and two these second holes radially relatively stretch out from this output channel, and this first hole and this second hole are separated by 90 °.
16, fluid dispensing subassembly as claimed in claim 1, wherein, rigid cylinder spare encases from the side and separates with the primary importance radially outward of elasticity foreskin, and limits the radially outward displacement of this elasticity foreskin in the second place.
17, fluid dispensing subassembly as claimed in claim 1, wherein this container is flexible.
18, fluid dispensing subassembly as claimed in claim 17, wherein this container is the part of bellow type.
19, fluid dispensing subassembly as claimed in claim 17, wherein this container is flexible stove bellows form.
20, fluid dispensing subassembly as claimed in claim 1, wherein this container is foldable, can be to this valve body accommodating fluid during with convenient folding.
21, fluid dispensing subassembly as claimed in claim 1, wherein this first hole extends to this outer surface a position of more approaching entrance point than this second hole.
22, fluid dispensing subassembly as claimed in claim 1, wherein this valve body is made of plastics.
23, fluid dispensing subassembly as claimed in claim 22, wherein this valve body is made by teflon (Telflon).
24, fluid dispensing subassembly as claimed in claim 1, wherein this input channel and this output channel are aimed on the direction of elongate of this valve body, and second end of this input channel and second end of this output channel separate on direction of elongate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102981 CN1023509C (en) | 1989-04-28 | 1989-04-28 | Valve assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89102981 CN1023509C (en) | 1989-04-28 | 1989-04-28 | Valve assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1046716A CN1046716A (en) | 1990-11-07 |
| CN1023509C true CN1023509C (en) | 1994-01-12 |
Family
ID=4854928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89102981 Expired - Lifetime CN1023509C (en) | 1989-04-28 | 1989-04-28 | Valve assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1023509C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244409B (en) * | 2007-02-17 | 2011-01-26 | 丁要武 | Springless emulsion pump |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1033717C (en) * | 1994-03-17 | 1997-01-01 | 中国科学院长春应用化学研究所 | Method for making sensor of CO gas at normal atmospheric temp. |
| US7097632B2 (en) * | 2002-10-28 | 2006-08-29 | Sherwood Services Ag | Automatic valve |
| EP3072494B1 (en) * | 2012-03-01 | 2017-10-18 | Becton, Dickinson and Company Ltd. | Pressure equalizing device and receptacle |
| CN102900872A (en) * | 2012-10-19 | 2013-01-30 | 江阴市万事兴汽车部件制造有限公司 | Automobile pipeline one-way valve |
| US10393276B2 (en) * | 2013-12-10 | 2019-08-27 | Semba Biosciences, Inc. | High-flow fluid valve block |
| US10533666B2 (en) * | 2017-01-12 | 2020-01-14 | The Boeing Company | Sealing structures and valve assemblies including the sealing structures |
| DE102017219811A1 (en) * | 2017-11-08 | 2019-05-09 | Robert Bosch Gmbh | Filling needle for dispensing a pharmaceutical liquid into a container and filling device |
| CN115654182B (en) * | 2022-12-28 | 2023-04-07 | 中铁工程服务有限公司 | Check valve and three-way pipe |
-
1989
- 1989-04-28 CN CN 89102981 patent/CN1023509C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101244409B (en) * | 2007-02-17 | 2011-01-26 | 丁要武 | Springless emulsion pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1046716A (en) | 1990-11-07 |
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| C14 | Grant of patent or utility model | ||
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |