CN100368713C - Dual-ring sealing washer and its mfg. method - Google Patents
Dual-ring sealing washer and its mfg. method Download PDFInfo
- Publication number
- CN100368713C CN100368713C CNB2006100395694A CN200610039569A CN100368713C CN 100368713 C CN100368713 C CN 100368713C CN B2006100395694 A CNB2006100395694 A CN B2006100395694A CN 200610039569 A CN200610039569 A CN 200610039569A CN 100368713 C CN100368713 C CN 100368713C
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- Prior art keywords
- metal tube
- ring
- restriction
- inboard
- outside
- 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.)
- Expired - Fee Related
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- 238000007789 sealing Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 156
- 239000002184 metal Substances 0.000 claims abstract description 156
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000012856 packing Methods 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229910000792 Monel Inorganic materials 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 241000446313 Lamella Species 0.000 claims description 3
- 238000000748 compression moulding Methods 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000005253 cladding Methods 0.000 abstract 3
- 230000000694 effects Effects 0.000 description 5
- 229910001026 inconel Inorganic materials 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000003462 Bender reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Abstract
The present invention relates to a dual-ring sealing washer which comprises an outside metal tube, an inside metal tube, flexible seal filling materials, a limited middle ring, a limited outer ring, a limited inner ring and cladding layers, wherein the upper and the lower surfaces of the inside and the outside metal tubes are respectively covered with the cladding layers; the outside metal tube is tightly clamped between the limited outer ring and the limited middle ring; the inside metal tube is tightly clamped between the limited middle ring and the limited inner ring; at least one through hole which penetrates the upper and the lower surfaces of the limited middle ring is arranged on the limited middle ring. The manufacturing method of the dual-ring sealing washer comprises the following steps: 1) the flexible seal filling materials are filled in an inner cavity of the metal tubes; 2) the metal tubes are bent into the shape of a ring; 3) two ends of each metal tube are firmly welded in a butt way; 4) the inside and the outside metal tubes are tightly clamped among the limited inner ring, the limited middle ring and the limited outer ring after the inside and the outside metal tubes are placed and moulded in a concentric way; 5) the upper and the lower surfaces of the inside and the outside metal tubes are respectively covered with the cladding layers. The adjustment of the compression of the sealing washer and the rebound degree can be realized by controlling the density of the seal filling materials, the conditions of sealing can be monitored by the double sealing surfaces, and the safety is high.
Description
Technical field
The present invention relates to a kind of sealing gasket and manufacture method thereof, particularly relate to a kind of Bicyclo-gasket seal and its preparation method.
Background technique
In the prior art, gasket seal is many to be made with flexible material, for example asbestos, rubber etc., because the ability that this kind material meets with stresses is relatively poor, in use for some time, owing to bear the effect of pressure and ambient temperature, gasket seal is easily aging or lax, sealing variation even lose sealability, flexible when mounted distortion has simultaneously influenced sealing effect.The gasket seal that other has metallic material to make, because of metal tube is a hollow, resistance to pressure and compression recovery performance are limited, Applicable scope is narrower, do on this basis with improved metallic packing, the metal tube of hollow is provided with opening, though play the effect of self-tightening sealing, but explosion easily takes place when using and by problems such as medium obstructions, do not reach desirable sealing effect.In the occasion higher to the gasket seal performance requirement, gasket seal is difficult to monitoring and brings loss when take place leaking, when serious even have an accident.
Summary of the invention
The object of the invention provides a kind of Bicyclo-gasket seal and its preparation method, makes gasket seal have excellent sealing performance and can realize letting out sliding monitoring.
Technological scheme of the present invention is: a kind of dual-ring sealing washer, the outside metal tube that comprises ring-type, inboard metal tube with the ring-type of the concentric setting of outside metal tube, flexible sealing packing outside being filled in respectively in the inner chamber of metal tube and inboard metal tube, encircle in the restriction between outside metal tube and inboard metal tube, cover the coating of outside metal tube and inboard metal tube upper and lower surface respectively, the restricted outer shroud of arranged outside of outside metal tube, inboard metal tube inboard is provided with ring in the restriction, between outside metal tube chucking encircles in restriction outer shroud and restriction, between encircling in inboard metal tube chucking encircles in restriction and limits, outside metal tube, inboard metal tube, the restriction outer shroud, encircle in ring and the restriction in the restriction to being provided with one heart, at least have a through hole on the ring in the restriction, through hole runs through the upper and lower surface of encircling in the restriction.
Through hole has a plurality of, and the homonymy port part of each through hole is arranged in the form of a ring along ring in the restriction.
The wall thickness range of outside metal tube and inboard metal tube is 0.1 to 3 millimeter, and the outer tube diameter scope of outside metal tube and inboard metal tube is 2 to 50 millimeters.
The wall thickness preferable range of outside metal tube and inboard metal tube is 0.3 to 0.5 millimeter, and the outer tube diameter scope of outside metal tube and inboard metal tube is 4 to 25 millimeters.
The material of metal tube is a kind of of carbon steel, stainless steel, copper, aluminium, Monel (Monel), the severe nickel of English (Inconel), titanium, the flexible sealing packing is one or more the mixture in graphite, fiber, the resin, coating is one or more the composite in graphite, fiber, the resin, a kind of in steel, stainless steel, copper, aluminium, Monel (Monel), the severe nickel of English (Inconel), the titanium material of ring in ring and the restriction in restriction outer shroud, the restriction.
Coating is a lamella, and its thickness range is 0.2 to 1.2 millimeter.
The upper and lower surface of coating is the plane.
A kind of manufacture method of dual-ring sealing washer, 1. it comprise the steps:, the flexible sealing packing inserted in the inner chamber of metal tube; 2., will be filled with the metal tube looped-shaped bending of flexible sealing packing; 3., the two ends mouth of pipe butt joint of the metal tube of ring-type is welded, form sealed pipe; 4., outside metal tube and inboard metal tube that 3. step is made place with one heart, by compression molding, be clamped in ring in the restriction, the restriction between the ring and restriction outer shroud; 5., the outside metal tube that 4. step is made and the upper and lower surface of inboard metal tube cover coating respectively.
Step 1. in, the stuffing pressure scope when the flexible sealing packing being inserted in the inner chamber of metal tube is 1 to 20Mpa.
Step 1. in, the density range of flexible sealing packing is 1.0 to 2.5g/cm
3
Step 1. after, the body that is filled with the metal tube of flexible sealing packing is blocked by needed length, enters step more 2..
The present invention compared with prior art has the following advantages: will insert the flexible sealing packing in the metal tube, by control packing density, can realize that double-sealing face can be realized the supervision to sealing condition, and is safe to the compression of gasket seal, the adjustment of rebound degree.
Description of drawings
Accompanying drawing 1 is a plan view of the present invention;
Accompanying drawing 2 is the A-A direction sectional view of accompanying drawing 1;
Wherein, 1, outside metal tube; 2, inboard metal tube 3, flexible sealing packing 4, coating; 5, restriction outer shroud; 6, encircle 7 in the restriction, outer surface under outer surface 10, the outside metal tube on ring 8, through hole 9, the outside metal tube in the restriction; 11, outer surface under outer surface 12, the inboard metal tube on the inboard metal tube.
Embodiment
Referring to accompanying drawing 1 to accompanying drawing 2, a kind of dual-ring sealing washer, the outside metal tube 1 that comprises ring-type, inboard metal tube 2 with the ring-type of outside metal tube 1 concentric setting, flexible sealing packing 3 outside being filled in respectively in the inner chamber of metal tube 1 and inboard metal tube 2, encircle 6 in the restriction between outside metal tube 1 and inboard metal tube 2, cover the coating 4 of outside metal tube 1 and inboard metal tube 2 upper and lower surfaces respectively, the restricted outer shroud 5 of arranged outside of outside metal tube 1, inboard metal tube 2 inboards are provided with ring 7 in the restriction, outside metal tube 1 is clamped in restriction outer shroud 5 and the restriction and encircles between 6, inboard metal tube 2 is clamped in the restriction in the ring 6 and restriction between the ring 7, outside metal tube 1, inboard metal tube 2, restriction outer shroud 5, encircling 7 in the restriction in ring 6 and the restriction is to be provided with one heart, at least have a through hole 8 on the ring 6 in the restriction, through hole 8 runs through the upper and lower surface of ring 6 in the restriction.Outside metal tube 1 is a carbon steel with the material of inboard metal tube 2, stainless steel, copper, aluminium, Monel (Monel), the severe nickel of English (Inconel), titanium a kind of, described flexible sealing packing 3 is a graphite, fiber, the mixture of one or more in the resin, described coating 4 is a graphite, fiber, the composite of one or more in the resin, wherein, but described resin preferably polytetrafluoroethylene, described restriction outer shroud 5, encircling 7 in ring 6 and the restriction in the restriction is steel, stainless steel, copper, aluminium, Monel (Monel), the severe nickel of English (Inconel), a kind of in the titanium.
Through hole 8 has a plurality of, and the homonymy port part of each through hole 8 is arranged in the form of a ring along ring 6 in the restriction.
The wall thickness range of outside metal tube 1 and inboard metal tube 2 is 0.1 to 3 millimeter, and preferred wall thickness range is 0.3 to 0.5 millimeter, and the outer tube diameter scope of outside metal tube 1 and inboard metal tube 2 is 2 to 50 millimeters, and preferred outer tube diameter scope is 4 to 25 millimeters.
As shown in Figure 2, outside metal tube 1 has outer surface 10 under the outside metal tube of outer surface 9 peace on the flat outside metal tube, and inboard metal tube 2 has outer surface 12 under the inboard metal tube of outer surface 11 peace on the flat inboard metal tube.Outer surface 9 is parallel with outer surface 10 under the metal tube of the outside on the metal tube of the outside, outer surface 11 is parallel with outer surface 12 under the inboard metal tube on the inboard metal tube, on the metal tube of the outside on outer surface 9 and the inboard metal tube outer surface 11 at grade, outer surface 12 is at grade under outer surface 10 and the inboard metal tube under the metal tube of the outside.Coating 4 is a lamella, and thickness range is 0.2 to 1.2 millimeter.The upper and lower surface of coating 4 is the plane.
A kind of manufacture method of dual-ring sealing washer, the flexible sealing packing that comprises the steps: 1., will be mud shape or powdery is inserted in the inner chamber of metal tube, and the pressure range of filling is 1 to 20Mpa, and the density range of packing is 1.5 to 1.8g/cm
3Step 1. after, according to actual needs, will be filled with the pipe cutting of the metal tube of flexible sealing packing, 2., with the intercepting metal tube bend to annular with three roller tube benders or four roller tube benders; 3., with the two ends mouth of pipe butt joint of the metal tube of ring-type, with electron beam welding or laser bonding, make weld bond smooth tight, form sealed pipe; 4., the outside metal tube and the inboard metal tube that 3. step are made are placed with one heart, by compression molding, being clamped on to limit in interior ring, the restriction encircles and limits between the outer shroud, the size of ring and restriction outer shroud is calculated in advance according to the size of required gasket seal in encircling in the restriction, limiting, pressure range is 10 to 100Mpa, and preferred pressure range is 40 to 50Mpa.5., the upper and lower surface of the concentric metallic tube that 4. step is made covers coating respectively.
According to using required different pressure, rebound degree, adjust the density of inserting the flexible sealing packing in the metal tube, reach requirement.When inboard metal tube (seal element) the 2 poorly sealed generations of dual-ring sealing washer are leaked, there are gas or liquid etc. to enter in the cavity that forms between inboard metal tube (seal element) 2 and the outside metal tube (seal element) 1 along the place, slit, the interior pressure of cavity this moment changes, the testing instrument that is arranged on flange or teletransmission just can record, and realizes the monitoring to sealing condition.Before leaking by solution, outer metal ring 1 has sealing effect equally, thereby provides the well-to-do preparatory period for changing gasket seal work, also provides foundation for changing gasket seal, has guaranteed the safety reliability of gasket seal.Because of the through hole of offering on the ring in the metal makes gas communication, any side sealing of metallic shim is not tight, can both be recorded, and has very high Security.
Claims (14)
1. dual-ring sealing washer, it is characterized in that: it comprises the outside metal tube (1) of ring-type, inboard metal tube (2) with the ring-type of the concentric setting of described outside metal tube (1), be filled in the flexible sealing packing (3) in the inner chamber of described outside metal tube (1) and inboard metal tube (2) respectively, be arranged in the restriction ring (6) between described outside metal tube (1) and the inboard metal tube (2), cover the coating (4) of described outside metal tube (1) and inboard metal tube (2) upper and lower surface respectively, the restricted outer shroud of arranged outside (5) of described outside metal tube (1), described inboard metal tube (2) inboard is provided with ring (7) in the restriction, described outside metal tube (1) is clamped in described restriction outer shroud (5) and the restriction and encircles between (6), described inboard metal tube (2) is clamped on to encircle in the described restriction in (6) and the restriction and encircles between (7), described outside metal tube (1), inboard metal tube (2), restriction outer shroud (5), encircling (7) in ring (6) and the restriction in the restriction is to be provided with one heart, at least have a through hole (8) on the ring (6) in the described restriction, described through hole (8) runs through the upper and lower surface of ring (6) in the described restriction.
2. dual-ring sealing washer according to claim 1 is characterized in that: described through hole (8) has a plurality of, and the homonymy port part of described each through hole (8) is arranged in the form of a ring along ring (6) in the described restriction.
3. dual-ring sealing washer according to claim 1, it is characterized in that: described outside metal tube (1) is 0.1 to 3 millimeter with the wall thickness range of inboard metal tube (2), and described outside metal tube (1) is 2 to 50 millimeters with the outer tube diameter scope of inboard metal tube (2).
4. dual-ring sealing washer according to claim 3, it is characterized in that: described outside metal tube (1) is 0.3 to 0.5 millimeter with the wall thickness range of inboard metal tube (2), and described outside metal tube (1) is 4 to 25 millimeters with the outer tube diameter scope of inboard metal tube (2).
5. dual-ring sealing washer according to claim 1, it is characterized in that: described outside metal tube (1) is a carbon steel with the material of inboard metal tube (2), stainless steel, copper, aluminium, Monel, the severe nickel of English, titanium a kind of, described flexible sealing packing (3) is a graphite, fiber, the composite of one or more in the resin, described coating (4) is a graphite, fiber, the composite of one or more in the resin, described restriction outer shroud (5), encircling (7) in ring (6) and the restriction in the restriction is carbon steel, stainless steel, copper, aluminium, Monel, the severe nickel of English, a kind of in the titanium.
6. dual-ring sealing washer according to claim 1 is characterized in that: described coating (4) is a lamella, and its thickness range is 0.2 to 1.2 millimeter.
7. dual-ring sealing washer according to claim 1 is characterized in that: the upper and lower surface of described coating (4) is the plane.
8. the manufacture method of a dual-ring sealing washer, it is characterized in that: 1. it comprise the steps:, the flexible sealing packing inserted in the inner chamber of metal tube; 2., will be filled with the metal tube looped-shaped bending of flexible sealing packing; 3., the two ends mouth of pipe butt joint of the metal tube of ring-type is welded, form sealed pipe; 4., outside metal tube that 3. step is made and inboard metal tube, ring and restriction outer shroud are positioned in the mould with one heart in encircling in the restriction, limiting, by compression molding, make inboard metal tube and outside metal tube chucking in described restriction, encircle and limit between the outer shroud in ring, the restriction; 5., the outside metal tube that 4. step is made and the upper and lower surface of inboard metal tube cover coating respectively.
9. the manufacture method of dual-ring sealing washer according to claim 8 is characterized in that: described step 1. in, the stuffing pressure scope when the flexible sealing packing being inserted in the inner chamber of metal tube is 1 to 20Mpa.
10. the manufacture method of dual-ring sealing washer according to claim 8 is characterized in that: described step 1. in, the density range of described flexible sealing packing is 1 to 2.5g/cm
3
11. the manufacture method of dual-ring sealing washer according to claim 8 is characterized in that: described step 1. after, the described body that is filled with the metal tube of flexible sealing packing is blocked by needed length, enters described step more 2..
12. the manufacture method of dual-ring sealing washer according to claim 8 is characterized in that: described step 4. in, pressure range is 10 to 100Mpa.
13. the manufacture method of dual-ring sealing washer according to claim 12 is characterized in that: described step 4. in, pressure range is 40 to 50Mpa.
14. the manufacture method of dual-ring sealing washer according to claim 8, it is characterized in that: described step 4. in, the flattening that is molded of the outside metal tube and inboard metal tube, form the following outer surface of a flat last outer surface peace respectively, outer surface is parallel with outer surface under the metal tube of the outside on the metal tube of the described outside, the last outer surface of described inboard metal tube is parallel with outer surface under the inboard metal tube, on the metal tube of the described outside the last outer surface of outer surface and inboard metal tube at grade, outer surface is at grade under outer surface and the inboard metal tube under the metal tube of the described outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100395694A CN100368713C (en) | 2006-04-06 | 2006-04-06 | Dual-ring sealing washer and its mfg. method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100395694A CN100368713C (en) | 2006-04-06 | 2006-04-06 | Dual-ring sealing washer and its mfg. method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1834503A CN1834503A (en) | 2006-09-20 |
| CN100368713C true CN100368713C (en) | 2008-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100395694A Expired - Fee Related CN100368713C (en) | 2006-04-06 | 2006-04-06 | Dual-ring sealing washer and its mfg. method |
Country Status (1)
| Country | Link |
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| CN (1) | CN100368713C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313016B (en) * | 2011-08-25 | 2014-08-27 | 中国石油化工股份有限公司 | Sealing control method for equipment |
| CN107642609B (en) * | 2017-09-22 | 2020-04-14 | 慈溪市春潮密封件有限公司 | Self-reinforced flexible sealing gasket |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1447300A (en) * | 1973-01-31 | 1976-08-25 | Goetzewerke | Cylinder head gasket |
| JPS61218712A (en) * | 1985-01-16 | 1986-09-29 | ビッツエンマン、ゲゼルシャフト、ミット ベシュレンクテル、ハフツンク、メタルシュラウフ− ファブリ−ク、プフォルツハイム | High temperature hermetical seal material |
| JPH04282075A (en) * | 1991-03-06 | 1992-10-07 | Asahi Press Kogyo Kk | Cylinder head gasket |
| US6224065B1 (en) * | 1999-05-07 | 2001-05-01 | Caterpillar Inc. | Face seal with inner and outer seal retainer members |
| CN2592968Y (en) * | 2002-12-30 | 2003-12-17 | 苏福坤 | Full-metal composite sealing element using stainless steel as face plate |
| CN1605739A (en) * | 2003-09-17 | 2005-04-13 | 内山工业株式会社 | Gasket of cylinder cover |
| CN2883810Y (en) * | 2006-04-06 | 2007-03-28 | 马志刚 | Dual-ring sealing gasket |
-
2006
- 2006-04-06 CN CNB2006100395694A patent/CN100368713C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1447300A (en) * | 1973-01-31 | 1976-08-25 | Goetzewerke | Cylinder head gasket |
| JPS61218712A (en) * | 1985-01-16 | 1986-09-29 | ビッツエンマン、ゲゼルシャフト、ミット ベシュレンクテル、ハフツンク、メタルシュラウフ− ファブリ−ク、プフォルツハイム | High temperature hermetical seal material |
| JPH04282075A (en) * | 1991-03-06 | 1992-10-07 | Asahi Press Kogyo Kk | Cylinder head gasket |
| US6224065B1 (en) * | 1999-05-07 | 2001-05-01 | Caterpillar Inc. | Face seal with inner and outer seal retainer members |
| CN2592968Y (en) * | 2002-12-30 | 2003-12-17 | 苏福坤 | Full-metal composite sealing element using stainless steel as face plate |
| CN1605739A (en) * | 2003-09-17 | 2005-04-13 | 内山工业株式会社 | Gasket of cylinder cover |
| CN2883810Y (en) * | 2006-04-06 | 2007-03-28 | 马志刚 | Dual-ring sealing gasket |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1834503A (en) | 2006-09-20 |
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| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Baoma Sealing Materials Co.,Ltd. Taicang City Assignor: Ma Zhigang Contract fulfillment period: 2008.10.1 to 2013.9.30 Contract record no.: 2008990000678 Denomination of invention: Dual-ring sealing washer and its mfg. method Granted publication date: 20080213 License type: Exclusive license Record date: 20081010 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.10.1 TO 2013.9.30; CHANGE OF CONTRACT Name of requester: TAICANG CITY BMW SEALING MATERIALS CO., LTD. Effective date: 20081010 |
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Effective date of registration: 20161222 Address after: Shuangfeng town Taicang city Suzhou City, Jiangsu province 215415 rich economic development zone Patentee after: SUZHOU BAOHUA MECHANICAL TECHNOLOGY Co.,Ltd. Address before: 215415 Taicang Regal Economic Development Zone, Jiangsu Patentee before: Ma Zhigang |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Shuangfeng town Taicang city Suzhou City, Jiangsu province 215415 rich economic development zone Patentee after: SUZHOU BMC SEALING TECHNOLOGY CO.,LTD. Address before: Shuangfeng town Taicang city Suzhou City, Jiangsu province 215415 rich economic development zone Patentee before: SUZHOU BAOHUA MECHANICAL TECHNOLOGY Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080213 |