CN1740599A - Control valve unit - Google Patents
Control valve unit Download PDFInfo
- Publication number
- CN1740599A CN1740599A CN 200510092348 CN200510092348A CN1740599A CN 1740599 A CN1740599 A CN 1740599A CN 200510092348 CN200510092348 CN 200510092348 CN 200510092348 A CN200510092348 A CN 200510092348A CN 1740599 A CN1740599 A CN 1740599A
- Authority
- CN
- China
- Prior art keywords
- valve
- control valve
- helical spring
- clack box
- valve unit
- 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.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000012856 packing Methods 0.000 claims abstract 2
- 235000012489 doughnuts Nutrition 0.000 claims description 6
- 230000008859 change Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 108010022579 ATP dependent 26S protease Proteins 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
- B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
- B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
- B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
- B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
- B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a kind of control valve unit (1), this control valve unit has a valve element (5), but be arranged in to this valve element longitudinal movement in the clack box (2) and with valve seat (a 4) acting in conjunction that is formed in the valve body (3), this valve element applies a force component of opening directive effect along valve seat (4) by spring mechanism (6) on the position of packing into, and operates along the closing direction of valve seat (4) by an electromagnetic driver.At least a portion valve element (5) is arranged in the valve chamber (7) that is limited in valve seat (4) zone by clack box (2).According to the present invention, spring mechanism (6) is arranged in the outside of valve chamber (7) basically.
Description
Technical field
The present invention relates to a kind of control valve unit that limits in detail at the preamble of claim 1.
Background technique
DE 100 36 576 A1 disclose a kind of control valve unit that forms the steerable valve of electromagnetism, and this control valve unit especially is used in the hydraulic braking system of automobile.This control valve unit has: the clack box with vertical hole; A valve vault that links to each other with clack box; An armature that is arranged in movingly along the longitudinal in the valve vault; And valve tappet or valve element, wherein valve tappet is connected like this with armature with interacting, make armature along the transmission of movement of valve seat closing direction to being formed with on the valve tappet section of closing, valve seat.
Valve tappet guides with little radial clearance on the whole length in the vertical hole of clack box, and is provided with at least two separated passages at the housing sidepiece.The valve chamber of a valve chamber with valve seat or a control valve unit links to each other with valve vault fluid communication ground by passage, and the surplus air that therefore is arranged in the valve vault can be discharged by passage.
Control valve unit remains on open mode by spring mechanism or Returnning spring under no stream situation, the spring mechanism that wherein forms pressure spring is installed in the valve chamber.This layout of spring mechanism can guarantee to install easily control valve unit.
But spring mechanism has been subjected to static and dynamic influence unfriendly in valve chamber, and this influence produces by the working medium that flows through valve chamber, and the working method of control valve unit is adversely affected.In addition, this influence is mobilization force and the steering force on that produce and the spring ring that act on pressure spring by flowing in the valve chamber, and this mobilization force and steering force obviously change on the whole working zone of control valve unit and just be difficult to reflect or can not predict.
In addition, because previous reasons, act on spring mechanism and owing to flow through influence that valve chamber produces and on the whole working zone of valve, may change by this way and only be difficult to and confirm, make the working method or the valve performance of control valve unit can realize with considerable expense, but this is to interrelate with high expense.
Summary of the invention
In control valve unit according to the present invention, this control valve unit has a valve element, but be arranged in to this valve element longitudinal movement in the clack box and with a valve seat acting in conjunction that is formed in the valve body, this valve element applies a force component of opening directive effect along valve seat on the mounting point, and operate along the closing direction of valve seat by an electromagnetic driver, wherein at least a portion valve planning is in a valve chamber that is limited in valve seat area by clack box, compare with the known control valve unit of prior art, when in the valve chamber zone, being in the dynamic flow situation, the adverse effect that the working method of control valve unit of the present invention is subjected to itself reduces at least in this wise, making provides the desired control and the control characteristic of control valve unit in its whole operating range, and is verified economically or reproduce by simple mode cost.
Foregoing is realized like this: spring mechanism is arranged in the outside of valve chamber basically, and fluid flows through this valve chamber when valve seat is opened.By layout according to spring mechanism of the present invention, spring mechanism only on small range or the fluid that is at all no longer flow through valve chamber load.Measure according to the present invention finally causes, the spring performance of spring mechanism and therefore also have the control of control valve unit and the change of control characteristic since the mobility status in the valve chamber no longer or only on very little scope, take place.
Other advantage according to the inventive subject matter and other favourable improvement project are provided by specification, accompanying drawing and claims.
Description of drawings
Show control valve unit in the accompanying drawings schematically, simplifiedly according to two embodiments of the present invention, explain this two embodiments in the following description in further detail, wherein when describing different embodiments, the member identical for 26S Proteasome Structure and Function uses identical reference character.Wherein:
Fig. 1 is first embodiment's of a control valve unit of the present invention schematic longitudinal sectional view;
Fig. 2 with zoomed-in view show second embodiment of the invention, an area I I who in Fig. 1, is shown specifically.
Embodiment
In Fig. 1, show the part of solenoid-operated control valve unit 1 with longitudinal sectional view, this control valve unit 1 is formed with valve element 5, this valve element 5 is movably disposed within along the longitudinal in the valve seat 2 and matches with valve seat 4 in being formed on valve body 3, this valve element 5 applies a force component of opening directive effect along valve seat 4 on the mounting point of spring mechanism 6, and can handle along the closing direction of valve seat 4 by an electromagnetic driver that is not shown specifically.
An area arrangements of facing valve seat 4 of valve element 5 is in valve chamber 7, and this valve chamber 7 is limited in the zone of valve seat 4 by clack box 2, and the size of this valve chamber is shown specifically by the shown rectangle of the dotted line among Fig. 1.Be arranged in zone in the valve chamber 7, valve element 5 and have a conical regional 5A of frustum, a cylindrical region 5B and ball collar shape the 3rd a regional 5C who is connected on the cylindrical region 5B itself who is connected on the conical regional 5A of frustum.The ball collar shape zone 5C of valve element 5 cooperates like this with the valve seat 4 of taper, makes to form such seal action when valve element 5 rests on the valve seat 4, makes the inflow region 8 of valve chamber 7 and the outflow zone 9 of valve chamber 7 be separated from each other by the valve seat 4 that seals.
Armature 10 is directed in the valve vault 11 that is fixedly connected with clack box 2 along the longitudinal movably, and limit a plurality of passage 12A jointly with valve vault 11, these passages 12A makes a valve dead zone 13 that is limited between valve vault 11 and the end away from the armature 10 of valve seat 4 be connected with valve chamber 7 by the tappet groove 12B of valve element 5.
Under the situation that does not flow through control valve unit 1, elastic force by spring mechanism 6 is pushed valve element 5 from valve seat 4 open along the direction in valve dead zone 13, therefore armature 10 lifts off a seat 2, in the zone in valve dead zone 13, be pressed against on the valve vault 11 and be positioned at above it, wherein this spring mechanism 6 respectively along axially support on clack box 2 and valve element 5.At valve element 5 with also on this position at armature 10, valve seat 4 breaks away from valve elements 5 or discharges from the regional 5C of the ball collar shape of valve element 5, and inflow region 8 with flow out regional 9 and be connected.
In addition, when control valve unit 1 was in this case, working medium was by control valve unit 1, promptly from 9 and one in outflow zone that the inflow region 8 of valve chamber 7 begins to be incorporated into control valve unit by valve seat 4 and the zone of flowing out regional 9 that be connected, ABS (anti-lock braking system), TCS (traction control system) or ESP (electronic stability program).
In order to close valve seat 4, being contained in electrical module on the valve vault 11, control valve unit 1 with known manner flows through like this, make electrical module produce an electromagnetic force, this electromagnetic force makes armature 10, and 4 direction moves from position shown in Figure 1 along valve seat, and the ball collar shape zone 5C of valve element 5 is pressed against on the valve seat 4 of valve body 6 hermetically, so control valve unit 1 has cut out.When control valve unit 1 was in this case, described inflow region 8 separated mutually with outflow zone 9, fell if having positive pressure between inflow region 8 and the outflow zone 9, did not have working medium to guide by control valve unit 1 so., have positive pressure in the inside of control valve unit 1 and fall during at the pressure of the inflow region 8 of valve chamber 7 greater than the pressure in the outflow zone 9 of control valve unit 1.
In addition, inflow region 8 is being separated with flowing out zone 9 by safety check 14 when having positive pressure and falling with respect to flowing out zone 9, and wherein safety check 14 is opened when negative pressure drop, and negative pressure drop means at the pressure of the pressure that flows out zone 9 greater than inflow region 8.
Doughnut 15 is being formed between the guiding area 16,17 between valve element 5 and the clack box 2, wherein the helical spring 6A of spring mechanism 6 by its away from the end portion supports of valve seat 4 on the valve element 5 and by its towards the end portion supports of the valve seat 4 of valve seat 4 on clack box 2.
In addition, owing to compare the geometrical shape that has changed clack box 2 with the known control valve unit of prior art, so spring mechanism 6 is arranged in the zone of air gap 21 control valve unit 1, shown in Figure 1.Spring mechanism is arranged on this position of control valve unit 1, still can makes control valve unit 1 relatively simply.In addition, the spillage of material of clack box side (this spillage of material be the structure owing to the clack box 2 in doughnut 15 zone change cause) is less, consequently, compare with the known control valve unit of prior art, the magnetic force of the electromagnetic actuators of control valve unit 1 of the present invention is to change not obviously.The described fact in back is important for the working method of solenoid-operated control valve unit, and in addition, this control valve unit also depends on wall thickness in air gap 21 zones, clack box 2 in shown embodiment.
In addition, by the layout between clack box 2 and the valve element 5 can be in a simple manner along leading axially and radially for the resetting of spring mechanism 6-pressure spring well.
Fig. 2 shows in accordance with another embodiment of the present invention, describe the area I I of feature among Fig. 1 in detail, and in this zone, spring mechanism 6 is formed with a tapered basically helical spring 6B.Spring mechanism 6 by away from the end of valve seat 4 along axially support on the end face 18 of valve element 5, and with valve chamber 7 in flow and directly be not arranged in equally in the zone of action of valve chamber 7 relatively.
In the contact area of helical spring 6B on valve element 5 or in the zone at the front surface 18 of valve element 5, at least be about as much as the internal diameter of helical spring 6B by the external diameter of cylindrical sector 19 helical spring 6B, valve element 5, thus helical spring 6B in the contact area of helical spring 6B on valve element 5 also along radially positioning and supporting thereon.
Make helical spring 6B be close to one by end and form convex shoulder 20 one, the annular bodily form, clack box 2 with clack box towards valve seat 4, and along axially support there.In addition, has an external diameter in the contact area of helical spring 6B on clack box 2: the approximate at least internal diameter of clack box 2 in helical spring 6B contact area that be equivalent to of this external diameter, consequently, the helical spring 6B in this zone is equally along radially supported or be directed.This shows, the helical spring 6B of formation taper is close on the valve element 5 with less diameter region and is close to bigger diameter region on the convex shoulder 20 of valve seat 2, and be installed in tightly in advance on the mounting point between clack box 2 and the valve element 5, therefore when the electrical module close current, the valve element applies one along the force component of opening directive effect by spring mechanism 6, and opens valve seat 4.
The embodiment's of convex shoulder 20 shown in Figure 2 replacement scheme can certainly stipulate, convex shoulder 20 forms by the independent component on the internal diameter that is arranged in valve seat 2.Therefore, for example have such scheme, form convex shoulder by a spring shackle that is arranged in the groove, this groove is formed on the inboard of clack box 2.
In the embodiment of control valve unit shown in Figure 21, to compare with control valve unit 1 according to Fig. 1, spring mechanism 6 consequently, by flow through the working medium of valve chamber 7 when valve seat 4 is opened, still can carry out a small amount of influence ground to control valve unit 6 and regulate more near valve chamber 7.But, comparing with embodiment shown in Figure 1, the embodiment of control valve unit 1 shown in Figure 2 is that a kind of manufacturing is more prone to and the solution of cost economy basically.In addition, compare with the known control valve unit of prior art, in the mode of execution of the control valve unit 1 of Fig. 2, material use available in the zone of air gap 21, clack box 2 can not change.
Claims (9)
1. a control valve unit (1), this control valve unit has a valve element (5), but be arranged in to this valve element longitudinal movement in the clack box (2) and with valve seat (a 4) acting in conjunction that is formed in the valve body (3), this valve element applies a force component of opening directive effect along valve seat (4) by spring mechanism (6) on the position of packing into, and can operate along the closing direction of valve seat (4) by an electromagnetic driver, wherein at least a portion valve element (5) is arranged in the valve chamber (7) that is limited in valve seat (4) zone by clack box (2), it is characterized in that spring mechanism (6) is arranged in the outside of valve chamber (7) basically.
2. control valve unit as claimed in claim 1 is characterized in that, described spring mechanism (6) has a helical spring (6A, 6B), by this helical spring valve element (5) flexibly is pressed against on the clack box (2) along the direction of opening of valve seat (4).
3. control valve unit as claimed in claim 2 is characterized in that, helical spring (6A) is columniform helical spring, and is arranged in the doughnut (15) that is limited by valve element (5) and clack box (2).
4. control valve unit as claimed in claim 3 is characterized in that, the doughnut (15) that is positioned between the guidance field (17,18) is formed between valve element (5) and the clack box (2).
5. control valve unit as claimed in claim 2, it is characterized in that, described helical spring (6B) be taper helical spring and one with zone that valve chamber (7) is connected in be arranged in the inside of clack box (2), wherein helical spring (6B) abuts in its less diameter region that valve element (5) is gone up and abuts on the clack box (2) with its bigger diameter region.
6. control valve unit as claimed in claim 5 is characterized in that, in the contact area that valve element (5) is located, the external diameter of valve element (5) is similar to the internal diameter that is equivalent to helical spring (6B) at least at helical spring (6B).
7. as claim 5 or 6 described control valve units, it is characterized in that in the contact area that clack box (2) is located, the internal diameter of clack box (2) is similar to the external diameter that is equivalent to helical spring (6B) at least at helical spring (6B).
8. as each described control valve unit among the claim 5-7, it is characterized in that helical spring (6B) abuts on the convex shoulder (20) of clack box (2).
9. control valve unit as claimed in claim 8 is characterized in that, convex shoulder is a spring shackle that is arranged in the groove.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004030424.6 | 2004-06-24 | ||
DE200410030424 DE102004030424A1 (en) | 2004-06-24 | 2004-06-24 | valve device |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1740599A true CN1740599A (en) | 2006-03-01 |
CN100520129C CN100520129C (en) | 2009-07-29 |
Family
ID=35507761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB2005100923489A Expired - Fee Related CN100520129C (en) | 2004-06-24 | 2005-06-24 | Valve device |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN100520129C (en) |
DE (1) | DE102004030424A1 (en) |
FR (1) | FR2872246B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114514393A (en) * | 2019-10-02 | 2022-05-17 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Solenoid valve, in particular for a slip-controlled motor vehicle brake system |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006002638A1 (en) * | 2006-01-19 | 2007-07-26 | Robert Bosch Gmbh | magnetic valve |
DE102006003490A1 (en) * | 2006-01-25 | 2007-07-26 | Robert Bosch Gmbh | Electromagnetically actuated fluid power valve for use on such as automobile braking systems |
DE102007051560A1 (en) * | 2007-10-29 | 2009-04-30 | Robert Bosch Gmbh | magnetic valve |
CN102741600B (en) * | 2010-02-03 | 2016-03-16 | 凯尔西-海耶斯公司 | Solenoid valve |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4406777A1 (en) * | 1994-03-02 | 1995-09-07 | Teves Gmbh Alfred | Solenoid valve, in particular for slip-controlled motor vehicle brake systems |
DE10036576A1 (en) | 2000-07-27 | 2002-02-07 | Bosch Gmbh Robert | Electromagnetically operated valve, in particular for hydraulic brake systems in motor vehicles |
EP1347907B1 (en) * | 2000-12-27 | 2005-06-08 | Continental Teves AG & Co. oHG | Valve mechanism, especially for an anti-skid automotive brake systems |
US6454240B1 (en) * | 2001-01-31 | 2002-09-24 | Delphi Technologies, Inc. | Anti-extrusion ring for use in conjunction with a vehicle solenoid valve |
-
2004
- 2004-06-24 DE DE200410030424 patent/DE102004030424A1/en not_active Ceased
-
2005
- 2005-06-22 FR FR0551706A patent/FR2872246B1/en not_active Expired - Fee Related
- 2005-06-24 CN CNB2005100923489A patent/CN100520129C/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114514393A (en) * | 2019-10-02 | 2022-05-17 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Solenoid valve, in particular for a slip-controlled motor vehicle brake system |
CN114514393B (en) * | 2019-10-02 | 2024-04-12 | 大陆汽车科技有限公司 | Solenoid valve, in particular for a slip-controlled motor vehicle brake system |
Also Published As
Publication number | Publication date |
---|---|
CN100520129C (en) | 2009-07-29 |
DE102004030424A1 (en) | 2006-01-19 |
FR2872246A1 (en) | 2005-12-30 |
FR2872246B1 (en) | 2011-07-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7661652B2 (en) | Electromagnetically actuatable valve | |
CN101245875B (en) | Solenoid valve | |
CA2591225C (en) | Solenoid armature with integrated spherical soft seal | |
US9310810B2 (en) | Adjustable damping valve device | |
KR101259302B1 (en) | Hydraulic valve assembly having a cartridge insert valve exhibiting a closing element arranged in a pressure equalized manner | |
CN1740599A (en) | Control valve unit | |
CN101583524B (en) | Solenoid valve | |
EP1065116B1 (en) | Isolation valve armature configured to reduce Bernoulli force during normal braking operation | |
CN1401523A (en) | Electromagnetic valve of brake system | |
KR102392753B1 (en) | Solenoid valve for brake system | |
US8281802B2 (en) | Valve for anti-lock brake system | |
CN109383470B (en) | Solenoid valve for brake system | |
CN102168771A (en) | Solenoid valve structure | |
KR101294674B1 (en) | Solenoid valve for brake system | |
CN105620456A (en) | Pressure reducing solenoid valve | |
KR102014693B1 (en) | Hydraulically controlled storage chamber valve | |
KR20090078847A (en) | Valve for electronic control brake system | |
CN1734142A (en) | Valving | |
US20090008587A1 (en) | Solenoid Valve | |
CN1721247A (en) | Valve apparatus | |
CN1740601A (en) | Control valve unit | |
KR102372404B1 (en) | Solenoid valve for brake apparatus | |
CN1712761A (en) | Valve device | |
KR100779480B1 (en) | Solenoid valve for ABS | |
KR101294123B1 (en) | Solenoid valve for brake system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20150624 |
|
EXPY | Termination of patent right or utility model |