US20020003073A1 - Pressure vessel, in particular for a vibration damper - Google Patents
Pressure vessel, in particular for a vibration damper Download PDFInfo
- Publication number
- US20020003073A1 US20020003073A1 US09/880,351 US88035101A US2002003073A1 US 20020003073 A1 US20020003073 A1 US 20020003073A1 US 88035101 A US88035101 A US 88035101A US 2002003073 A1 US2002003073 A1 US 2002003073A1
- Authority
- US
- United States
- Prior art keywords
- wall
- envelope
- pressure vessel
- vibration damper
- filling connection
- 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
- 238000000576 coating method Methods 0.000 claims abstract description 31
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 230000004888 barrier function Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 6
- 239000007924 injection Substances 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 25
- 239000010410 layer Substances 0.000 description 23
- 239000011888 foil Substances 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000011241 protective layer Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/062—Bi-tubular units
-
- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/066—Units characterised by the partition, baffle or like element
Definitions
- the envelope has an injection-molded filling connection.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Fluid-Damping Devices (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
Description
- 1. Field of the Invention
- The invention relates to a pressure vessel, in particular for a vibration damper, filled with a medium and having a variable-shape envelope containing a mass of gas for volume compensation.
- 2. Description of the Related Art
- U.S. Pat. No. 6,116,585 discloses a pressure vessel which is filled with at least one medium which is prestressed by a mass of gas which is enclosed in a variable-shape envelope, in particular for volume compensation in a vibration damper, having a wall in which a pressurized gas is enclosed. The wall of the envelope is at least partially formed from a barrier layer and the envelope being composed of a plurality of individual parts.
- On account of the gastight barrier layer, the emergence of gas from the pressure vessel is considerably improved compared to simple pressure vessels with a rubber membrane. Nevertheless, over the intended service life, it is possible to detect a loss of gas from the pressure vessel, and the aim is for this loss to be reduced further. One procedure consists in the use of a plurality of gastight barrier layers. Alternatively, the barrier layers may be designed with a protective layer which can withstand particularly high thermal loads. Extensive tests have shown that the temperature at which the pressure vessel is used has a decisive effect on the seal. However, heat-resistant protective layers of this nature are relatively expensive, and consequently they tend not to be suitable for large-series production.
- It is an object of the present invention to minimize the problems which are known from the prior art and are caused by the loss of gas from the pressure vessel.
- According to the invention, the object is achieved by providing an outside coating, which seals an end face of the envelope, at least at an edge-side contact region of the individual parts of the envelope.
- The envelope is formed by at least two individual parts which are welded together. The previous weak point of the edges at which the gastight barrier layer is only in superficial contact is significantly improved by the additional coating.
- To achieve the maximum possible compatibility of the outside coating, with the envelope comprising a plurality of layers, the material for the coating of the end face is similar to the outside layer of the envelope.
- With a view to saving on use of raw materials, but also to keeping the envelope as flexible as possible, the edge-side coating is restricted to a strip of ≦5 mm.
- In connection with this measure, the envelope has a prestamped form which is adapted to the intended installation position, the coating being made on the prestamped envelope. The stresses which occur within the coatings can be significantly reduced.
- In a further advantageous configuration, the envelope has an injection-molded filling connection.
- In order to ensure that there are no additional leakage points, the filling connection is arranged in the edge region. For this purpose, the filling connection has a conical contact region, on which in each case a section of the edges of the envelope comes to bear.
- In a further advantageous configuration, the edge-side coating is connected to the filling connection.
- Other objects and features of the present invention will become apparent from the following detailed description considered in conjunction with the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims. It should be further understood that the drawings are not necessarily drawn to scale and that, unless otherwise indicated, they are merely intended to conceptually illustrate the structures and procedures described herein.
- FIG. 1 shows an application example of the enclosed mass of gas for a vibration damper,
- FIG. 2 shows a section through the vibration damper and the enclosed mass of gas,
- FIGS. 3a and 3 b show sections through the wall of the envelope,
- FIG. 4 shows a view of the enclosed mass of gas,
- FIG. 5 shows a cross section through the enclosed mass of gas,
- FIG. 6 shows the filling connection in detail, and
- FIG. 7 shows an injection mold for the envelope.
- FIG. 1 shows a
vibration damper 1 of two-tube design which is known per se and in which apiston rod 3 with apiston 5 is guided in an axially movable manner in apressure tube 7. Thepiston 5 separates the pressure tube into anupper working chamber 9 and alower working chamber 11, the two working chambers being connected viadamping valves 13 in the piston. - The
pressure tube 7 is encased by avessel tube 15, the inner wall of the vessel tube and the outer wall of the pressure tube forming acompensation space 17, which is completely filled with damping medium and an enclosed mass ofgas 19 as far apiston rod guide 21. At the lower end of theworking space 11 there is a base which, if appropriate, has anonreturn valve 23 and adamping valve 25. - In the event of a movement of the piston rod, the displaced piston rod volume is compensated for by a change in volume of the enclosed mass of gas.
- FIG. 2 shows a section through the
vibration damper 1 in the region of the enclosed mass ofgas 19. The enclosed mass of gas comprises anenvelope 27 with awall 29 which is pressure-filled with a gas, in particular nitrogen. Alternatively, it is possible to use CO2, or, if assembly is sufficiently rapid, a liquefied gas. Thewall 29 has an inner wall 29 i and anouter wall 29 a, which in turn form a start and an end. In this example of an application, the enclosed mass of gas is fitted into thecompensation space 17 in the form of an arc of a circle. The sectional illustration shows chambers of the enclosed mass of gas arranged in a row. The chambers are formed by joins 27V, which run parallel to the axis of the vibration damper, between the inner wall 29 i and theouter wall 29 a, the joins being formed only in sections so that all the chambers can exchange gas with one another and the same operating pressure prevails in each chamber. As the operating pressure in the working spaces rises, the chambers of the enclosed mass of gas are compressed. The wall is not elastically deformed, since the internal pressure and external pressure are identical. Only the distances between the joins 27V on the pitch circle of the joins increase, with the result that the inner and outer walls are pressed toward one another. - The envelope comprises a
filling connection 31 which is accessible via a filling opening 33 in the vessel tube. During assembly of the vibration damper, the unfilled envelope is placed into thevessel tube 15, thefilling connection 31 being fastened into the filling opening. Then, thepressure tube 7 is introduced. Next, the entire vibration damper is filled with oil, the volume of oil filling depending on the subsequent operating pressure, which is determined by the enclosed mass of gas when the piston rod is at a standstill. After the filling operation, the filling opening can be closed off by means of aball 35 which is pressed in. - FIG. 3a shows a section through the
wall 29, it being possible for the inner wall 29 i and theouter wall 29 a to consist of the same material or to have the same structure. The core component of the wall is a metal foil, in particular an aluminum foil 29A1, which is only a few μm thick. Rolled aluminum is particularly suitable. The aluminum foil serves as a barrier layer which is responsible for providing a seal for the enclosed gas. On the outside, the aluminum foil is coated by aprotective film 29S. This protective film promotes stability, increases the tear strength and prevents excessive creasing. The thickness of this layer is similar to that of the aluminum foil and the layer consists, for example, of PET or polyamide. - On the inside, the wall has a
weldable coating 29V. The weldable coating may also be of multilayer, for example two-layer, design and its thickness may for example be four to five times that of the aluminum foil. In the case of amultilayer coating 29V, the individual layers are if appropriate stretched and applied to one another crosswise. The result is a high strength and dimensional stability, and in particular internal stresses are compensated for. PP and PA have proven suitable materials. The layer thickness is approximately 50 to 100 μm. If PA is used for both the protective layer and the welding layer, a sealing weld can be executed for the envelope. During a sealing weld, the protective layer is laid so that it overlaps the welding layer and is welded by the supply of heat. - FIG. 3b shows the construction of the wall of the envelope, which additionally has a
substrate layer 29T. This substrate layer provides the strength in all directions of loading on theenvelope 29. When using the substrate layer, the metal foil 29A1 can be reduced to the absolute minimum. As a result, the envelope becomes more flexible and acquires elastomeric properties. Furthermore, the substrate layer protects the metal foil during the welding operation. It must be ensured that no operating medium from the pressure vessel comes into contact with the metal foil. Depending on the operating medium, the metal foil may be subject to chemical attack. It is desirable for the metal foil 29A1 to be arranged in the neutral part of the wall of the envelope, in order to optimize flexural stresses. - An
adhesive layer 29K, for example of PU, may be applied between the other layers, this adhesive layer being responsible for ensuring that the layers are held securely together. The adhesive layer may be applied in the form of a conventional adhesive or may be inlaid as an adhesive film. Alternatively, the individual layers may also be calendered. - FIG. 4 shows an unwound
gas cushion 19. Weld seams 37 are formed at theedge 36, enabling a continuous body to be formed from the inner wall 29 i and theouter wall 29 a. Theweldable coating 29V, cf. FIG. 3, is required for the weld seams 37. It can also be seen from FIG. 4 why an inner wall and an outer wall are used. - This view also shows the joins27V. The joins are only formed in sections, so that adjacent chambers can exchange volume. It is not absolutely necessary for joins to be in the form of seams. Individual joining points are also conceivable.
- As can be seen when FIGS. 4 and 5 are considered together, the
edge 36 is provided with anoutside coating 39, which seals an encircling end face 41 of the envelope at least in sections. Thecoating 39 has deliberately been kept within a narrow range of 2 to 5 mm. On the one hand, the intention is to save material, and on the other hand an excessively wide edge would impair the flexibility of the envelope. To achieve the best possible contact with respect to thecoatings 29V, the edge-side coating of the end faces is selected at least from a similar coating material, and preferably from the same coating material. - As can also be seen from FIGS. 4 and 5, the filling
connection 31 is also arranged at theedge 36 of the envelope. FIG. 6 shows the fillingconnection 31 as a detail. The filling connection is injected-molded in the envelope. There are various procedures used for this purpose. It is important to ensure, in the interior of the envelope, that the material which is injected into a mold cannot escape uncontrollably into the envelope. For this purpose, it is possible to use mating holders (not shown) which in practice form one wall of the mold and from which envelopes which have not yet been completely closed can be removed. Alternatively, the envelope can be prefilled with a compressed gas. The gas cushion then acts as a wall of the mold. - The
filling connection 31 has aconical contact region 43, on which theedge 36, which is still open for the injection operation, comes to bear. Depending on the acceptable outlay on tooling, the edge-side coating should also extend to the region of the filling connection, the edge-side coating 39 then being joined to the fillingconnection 31. Therefore, the filling connection should comprise a material which joins to or is as similar as possible to the coating. As an additional feature, the filling connection may include areinforcement ring 45, which can serve as a bearing surface on the pressure body. Furthermore, the envelope with the reinforcement ring can be picked up more easily by a robot without causing damage. - FIG. 7 provides a highly simplified view of an
injection mold 47 for the edge-side coating 39 of theenvelope 27. As can be seen from the parting joint of the injection mold, the envelope is formed from a completely planar layer into a shape which is adapted to the subsequent installation position. - Thus, while there have shown and described and pointed out fundamental novel features of the invention as applied to a preferred embodiment thereof, it will be understood that various omissions and substitutions and changes in the form and details of the devices illustrated, and in their operation, may be made by those skilled in the art without departing from the spirit of the invention. For example, it is expressly intended that all combinations of those elements and/or method steps which perform substantially the same function in substantially the same way to achieve the same results are within the scope of the invention. Moreover, it should be recognized that structures and/or elements and/or method steps shown and/or described in connection with any disclosed form or embodiment of the invention may be incorporated in any other disclosed or described or suggested form or embodiment as a general matter of design choice. It is the intention, therefore, to be limited only as indicated by the scope of the claims appended hereto.
Claims (16)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10029150A DE10029150C1 (en) | 2000-06-14 | 2000-06-14 | Pressure vessels, in particular for a vibration damper |
DE10029150.3 | 2000-06-14 | ||
DE10029150 | 2000-06-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20020003073A1 true US20020003073A1 (en) | 2002-01-10 |
US6450307B2 US6450307B2 (en) | 2002-09-17 |
Family
ID=7645602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/880,351 Expired - Fee Related US6450307B2 (en) | 2000-06-14 | 2001-06-13 | Pressure vessel, in particular for a vibration damper |
Country Status (3)
Country | Link |
---|---|
US (1) | US6450307B2 (en) |
DE (1) | DE10029150C1 (en) |
FR (1) | FR2810384B1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050205583A1 (en) * | 2004-02-03 | 2005-09-22 | Zf Friedrichshafen Ag | Filling valve for a pressure vessel |
US20090041009A1 (en) * | 2007-08-08 | 2009-02-12 | Funai Electric Co., Ltd. | Ip telephone terminal, ip telephone system and recording medium |
US20120048664A1 (en) * | 2009-04-28 | 2012-03-01 | Kayaba Industry Co., Ltd. | Multi-cylinder hydraulic shock absorber |
US20150004388A1 (en) * | 2013-06-27 | 2015-01-01 | Kitagawa Industries Co., Ltd. | Thermally conductive material |
US20150200118A1 (en) * | 2014-01-16 | 2015-07-16 | Taiwan Semiconductor Manufacturing Co., Ltd. | Bonding apparatus and method |
CN115091677A (en) * | 2022-06-30 | 2022-09-23 | 深圳市鸿富诚新材料股份有限公司 | Calendering baffle mechanism, calendering equipment and calendering method |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005005789B4 (en) * | 2005-02-09 | 2010-01-14 | Zf Friedrichshafen Ag | Pressure vessel in a vibration damper |
US20060226585A1 (en) * | 2005-04-07 | 2006-10-12 | Drain David A | Air spring suspension system |
US7921974B2 (en) | 2005-11-29 | 2011-04-12 | Fox Factory, Inc. | Damping cylinder with annular bladder |
DE102007058544A1 (en) | 2007-02-23 | 2008-08-28 | Zf Friedrichshafen Ag | pressure vessel |
DE102008043656B3 (en) * | 2008-11-12 | 2010-05-12 | Zf Friedrichshafen Ag | Method for producing a pressure vessel |
DE102010007237A1 (en) | 2010-02-09 | 2010-09-23 | Daimler Ag | Suspension system for vehicle, has hydraulic actuator and hydraulic fluid-receiving reservoir, where motor-pump-unit is arranged between reservoir and actuator, which conveys hydraulic fluid from actuator into reservoir |
US20160288306A1 (en) * | 2015-04-06 | 2016-10-06 | Caterpillar Inc. | Hydraulic hammer having self-contained gas spring |
US11359648B2 (en) | 2019-05-31 | 2022-06-14 | Tenneco Automotive Operating Company Inc. | Accumulator with flexible inflatable container |
US11904977B2 (en) | 2019-10-11 | 2024-02-20 | Eko Sport, Inc. | Compensator |
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US3123347A (en) * | 1964-03-03 | Figure | ||
GB748469A (en) * | 1952-11-12 | 1956-05-02 | Applic Mach Motrices | An improved hydraulic shock absorber |
US3027600A (en) * | 1960-08-05 | 1962-04-03 | Gen Motors Corp | Preformed gas containing plastic cell and method of manufacture |
GB1031167A (en) * | 1961-08-30 | 1966-05-25 | Girling Ltd | Improvements relating to hydraulic dampers and the like |
DE1775663C3 (en) * | 1968-09-06 | 1976-01-02 | Fichtel & Sachs Ag, 8720 Schweinfurt | Vibration damper, in particular with a helical spring clamped between the piston rod end and the cylinder |
DE2235206A1 (en) * | 1971-07-28 | 1973-02-15 | Girling Ltd | HYDRAULIC ACCUMULATOR |
DE2337665C3 (en) * | 1973-07-25 | 1980-06-12 | Adam Opel Ag, 6090 Ruesselsheim | Hydraulic twin-tube vibration damper, in particular for vehicles |
CH652174A5 (en) * | 1981-02-27 | 1985-10-31 | Leduc Rene Hydro Sa | OLEO-PNEUMATIC ACCUMULATOR AND METHOD FOR MANUFACTURING THE ACCUMULATOR. |
US4443926A (en) * | 1982-02-08 | 1984-04-24 | Ford Motor Company | Method of assembling shock absorbers |
FR2564164B1 (en) * | 1984-05-11 | 1988-09-09 | Mte | ELASTIC COMPENSATION CHAMBER FOR HYDRAULIC ENERGY DISSIPATOR |
US4880213A (en) * | 1986-01-30 | 1989-11-14 | Nhk Spring Co., Ltd. | Gas spring apparatus |
US4742898A (en) * | 1986-09-17 | 1988-05-10 | Enidine Incorporated | Shock absorber with gas charged return spring |
MY106949A (en) * | 1988-02-05 | 1995-08-30 | Rudy Marion F | Pressurizable envelope and method |
DE4100880A1 (en) * | 1990-01-16 | 1991-07-18 | Nobuyuki Sugimura | Hydraulic accumulator has compressible shock absorber section - holding silicone oil in spherical containers |
US5215124A (en) * | 1990-10-23 | 1993-06-01 | Honda Giken Kogyo Kabushiki Kaisha | Accumulator |
EP0527564B1 (en) * | 1991-07-29 | 1996-05-29 | ROLLS-ROYCE plc | Pressurised storage for gases |
US5618629A (en) * | 1991-12-27 | 1997-04-08 | Tokai Rubber Industries, Inc. | Flexible partition member for hydraulic accumulator, including ethylene-vinyl alcohol copolymer gas-barrier layer and polyamide resin elastic layer |
FR2700375B1 (en) * | 1993-01-13 | 1995-03-17 | Peugeot | Waterproof elastic membrane. |
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US6116585A (en) | 1997-08-11 | 2000-09-12 | Mannesmann Sachs Ag | Pressure holder with an enclosed gas mass |
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US6016841A (en) * | 1997-08-27 | 2000-01-25 | Autoliv Asp, Inc. | Accumulator with low permeability flexible diaphragm |
DE19741651C1 (en) * | 1997-09-22 | 1998-10-15 | Mannesmann Sachs Ag | Piston-type damper for vehicle suspension |
-
2000
- 2000-06-14 DE DE10029150A patent/DE10029150C1/en not_active Expired - Lifetime
-
2001
- 2001-06-13 US US09/880,351 patent/US6450307B2/en not_active Expired - Fee Related
- 2001-06-13 FR FR0107721A patent/FR2810384B1/en not_active Expired - Fee Related
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050205583A1 (en) * | 2004-02-03 | 2005-09-22 | Zf Friedrichshafen Ag | Filling valve for a pressure vessel |
US20090041009A1 (en) * | 2007-08-08 | 2009-02-12 | Funai Electric Co., Ltd. | Ip telephone terminal, ip telephone system and recording medium |
US20120048664A1 (en) * | 2009-04-28 | 2012-03-01 | Kayaba Industry Co., Ltd. | Multi-cylinder hydraulic shock absorber |
US20150004388A1 (en) * | 2013-06-27 | 2015-01-01 | Kitagawa Industries Co., Ltd. | Thermally conductive material |
US10287472B2 (en) * | 2013-06-27 | 2019-05-14 | Kitagawa Industries Co., Ltd. | Thermally conductive material |
US20150200118A1 (en) * | 2014-01-16 | 2015-07-16 | Taiwan Semiconductor Manufacturing Co., Ltd. | Bonding apparatus and method |
CN115091677A (en) * | 2022-06-30 | 2022-09-23 | 深圳市鸿富诚新材料股份有限公司 | Calendering baffle mechanism, calendering equipment and calendering method |
Also Published As
Publication number | Publication date |
---|---|
US6450307B2 (en) | 2002-09-17 |
DE10029150C1 (en) | 2001-08-16 |
FR2810384B1 (en) | 2005-09-23 |
FR2810384A1 (en) | 2001-12-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: MANNESMANN SACHS AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LUTZ, DIETER;REEL/FRAME:012109/0209 Effective date: 20010629 |
|
AS | Assignment |
Owner name: ZF FRIEDRICHSHAFEN AG, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ZF SACHS AG;REEL/FRAME:016824/0376 Effective date: 20050622 Owner name: ZF SACHS AG, GERMANY Free format text: CHANGE OF NAME;ASSIGNOR:MANNESMANN SACHS AG;REEL/FRAME:016871/0474 Effective date: 20011127 |
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Year of fee payment: 4 |
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Year of fee payment: 8 |
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REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
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