CA2246058C - Process for the manufacture of a torsion vibration damper - Google Patents
Process for the manufacture of a torsion vibration damper Download PDFInfo
- Publication number
- CA2246058C CA2246058C CA002246058A CA2246058A CA2246058C CA 2246058 C CA2246058 C CA 2246058C CA 002246058 A CA002246058 A CA 002246058A CA 2246058 A CA2246058 A CA 2246058A CA 2246058 C CA2246058 C CA 2246058C
- Authority
- CA
- Canada
- Prior art keywords
- ring
- fly
- hub
- bridge
- single part
- 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
Links
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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/124—Elastomeric springs
- F16F15/126—Elastomeric springs consisting of at least one annular element surrounding the axis of rotation
-
- 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
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
- F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
- F16F15/1414—Masses driven by elastic elements
- F16F15/1435—Elastomeric springs, i.e. made of plastic or rubber
- F16F15/1442—Elastomeric springs, i.e. made of plastic or rubber with a single mass
-
- 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
- F16F2226/00—Manufacturing; Treatments
- F16F2226/04—Assembly or fixing methods; methods to form or fashion parts
-
- 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
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/36—Pulleys
- F16H2055/366—Pulleys with means providing resilience or vibration damping
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Pulleys (AREA)
- Springs (AREA)
Abstract
A process for the manufacture of a torsion vibration damper is disclosed wherein a fly ring and a hub ring (1, 2) are produced and relatively rotatably connected by subsequent insertion of a rubber ring (3). The fly and hub rings (1, 2) are manufactured as a single part with a nominal fracture line (4) at the region of transition between the rings. The single part is separated into the individual rings along the nominal fracture line (4) before of after the insertion of the rubber ring (3) and without removal of material. This process is more cost efficient and the single part can be easier handled and shipped at lower costs than individual rings.
Description
CA 022460~8 1998-09-30 PROCESS FOR THE MANUFACTURE OF A TORSION VIBRATION DAMPER
The invention relates to a process for the manufacture of a torsion vibration damper wherein a fly ring and a hub ring are produced and relatively rotatably connected by subsequent insertion of an elastic ring therebetween.
Torsion vibration dampers are used, for example, in pulleys mounted on internal combustion engine crankshafts to isolate belt driven accessories from vibrationscaused by uneven speed of the crankshaft. In a known process, the fly and hub rings are independently manufactured and subsequently fastened together by insertion of the elastic ring to be rotable relative to each other. The independent manufacture of the hub and fly rings in the form of separate parts is associated with significant cost.
It is now an object of the invention to provide a process for the manufacture of a torsion vibration damper of this general type which can be carried out at lower cost than the known process.
This object is achieved in accordance with the invention in a process of the above-mentioned generic type, wherein the hub and fly rings are produced as a single part with a nominal fracture line at a transition between the rings. The single part is divided into the hub and fly rings by fracturing along the nominal fracture line for the production of independent parts. The fracturing is carried out before or after insertion of the elastic ring and without removal of material. The hub and fly rings are preferably displaced relative to one another in axial direction for the braking of the single part along the nominal fracture line, for example, by the application of axial tension and/or pressure. For example, the elastic ring can be inserted into the intermediate gap defined by the hub and fly rings before braking apart of the rings and the resulting damper stored and shipped in this condition for the rings to be broken apart upon installation of the damper.
The mutual manufacture of the fly and hub rings in the form of a single part allows CA 022460~8 1998-09-30 the production in a single process step of the surfaces which in the finished torsion vibration damper are radially evenly spaced apart and together define the gap receiving the elastic ring. The gap can be manufactured, for example, by simultaneous machining of both surfaces. This prevents undesired tolerances within and between the respective gap wall diameters which are adversely cumulative andmay add up in such a way that the radial compression which is required for the securing of the subsequently inserted elastic ring is no longer sufficient for reliable fastening of the elastic ring. In the torsion vibration damper of the invention, the radial compression of the elastic ring can hereby be significantly better controlled than in torsion vibration dampers of the prior art. This is of great advantage for the achievement of a long service period.
The mutual manufacture of the fly ring and the hub ring in a single manufacturing operation further results in a significant reduction in manufacturing cost. Moreover, the hub and fly rings can be transported and stored as a single unit until the final insertion of the rubber ring. This significantly facilitates handling and further reduces cost. In addition, the braking of the single part along the nominal fracture line can also be integrated with the rubber ring insertion step, and possibly facilitate that step.
In the process in accordance with the invention, torsion vibration dampers can be manufactured wherein the fly ring radially outwardly surrounds the hub ring as well as dampers wherein the fly ring is positioned radially inward of the hub ring.
Furthermore, it can also be used for the manufacture of combined models which have a fly ring on the outside as well as the inside.
The radially opposite surfaces of the fly and hub rings which engage the elastic ring during the intended use are normally of cylindrical shape. However, other shapesare also easily achievable, for example, bell-shaped profiles.
The destruction of the nominal fracture line without machining in accordance with CA 022460~8 1998-09-30 the invention requires that the material of the fly and hub rings have a certainbrittleness. The use of iron-containing materials has been found especially suitable for this purpose.
The nominal fracture line between the fly ring and the hub ring is preferably provided as a bridge between the rings which has a wedge-shaped, pointed cross section inorder to ensure that the desired braking apart of the rings before or after the insertion of the elastic ring takes place at a very precisely defined location and without the braking off of loose material. In the preferred, finished torsion vibration damper, the edge of the fracture is always surrounded by a radially protruding surface of the fly ring or the hub ring to cover the fracture. Injuries due to careless handling of the damper or working in the vicinity of the torsion vibration damper, for example, during repairs of parts in the vicinity thereof are substantially prevented.
The outer appearance of the damper of the invention can otherwise be the same asthat of known torsion dampers. It is therefore possible, without problems, to provide teeth and/or a groove profile on the radially outer surface of one of the fly ring and the hub ring for connection of the finished torsion vibration damper with secondary devices, for example, by way of a belt drive.
In another aspect, the invention provides a torsion vibration damper precursor, including a fly ring and a hub ring, the rings being concentrically aligned and together defining an annular intermediate gap for insertion of an elastic ring, the precursor further including an annular bridge for rigidly connecting the hub ring with the fly ring, the annular bridge having a wedge shaped, pointed cross section todefine a nominal fracture line for permitting braking of the bridge for separation of the precursor into individual hub and fly rings.
In still another aspect of the invention, there is provided a torsion vibration damper, including a fly ring and a hub ring, the rings being concentrically aligned and together defining an intermediate gap, an elastic ring frictionally fastened in the gap, and an annular bridge for rigidly connecting the hub ring and the fly ring, the annular CA 022460~8 1998-09-30 bridge having a wedge-shaped, pointed cross section to define a nominal fractureline for permitting braking of the bridge for separation of the hub ring from the fly ring.
The process in accordance with the invention is further described in the following by way of example only and with reference to the drawing, wherein FIGS. 1 to 3 show a process for the manufacture of a torsion vibration damper inaccordance with the invention, wherein the fly ring radially outwardly surrounds the hub ring; and FIGS. 4 to 6 show a process for the manufacture of a torsion vibration damper of the invention wherein the hub ring radially outwardly surrounds the fly ring.
In the process illustrated in FIGS. 1 to 6, a single piece of material is used for the combined manufacture of the hub ring and the fly ring, which single piece is transformed into a shape as shown in FIGS. 1 to 4 by forging, casting and/or machining. The fly ring 1 and the hub ring 2 are thereby constructed as a single part and merge at an annular bridge 5 which has a wedge-shaped, reduced profile to define nominal fracture site 4. The one-piece fly and hub ring can be easily stored and shipped in this form.
FIGS. 2 and 5 illustrate that the fly ring 1 and the hub ring 2 have been separated from one another by a relative axial displacement and now form two mutually independent parts. The axial tension and/or pressure forces required for the separation of the two parts result in a chip-free destruction of the nominal fracture site 4. The separation can be very quickly achieved and does not create any loose fragments. The relative displacement can be carried out before or after the insertion of the elastic ring 3, which is preferably a rubber ring.
FIGS. 3 and 6 show two preferred embodiments of a finished torsion vibration CA 022460~8 1998-09-30 damper in accordance with the invention wherein a rubber ring 3 has been pressedunder elastic deformation into the radial gap 6 between the fly ring 1 and the hub ring 2. The radial compression of the rubber ring 3 is thereby adjusted by selection of the width of gap 6 so that a sliding movement of the rubber ring during relative rotation of the fly ring 1 with respect to the hub ring 2 is prevented. The total relative rotation of the fly ring 1 with respect to the hub ring 2 is exclusively achieved by elastic deformation of the rubber ring 3 for the purpose of dampening the causative vibration.
Of course, it is also possible to use a directly vulcanized-in rubber ring instead of an inserted rubber ring 3. For that embodiment, it is only necessary to place the fly ring and the hub ring in an appropriate vulcanization tool, to fill the remaining radial gap between the two rings with a vulcanizable rubber mass, and to solidify the rubber mass by vulcanization for connection thereof with the two rings 1, 2.
Changes and modifications in the specifically described embodiments can be carried out without departing from the scope of the invention which is intended to be limited only by the scope of the appended claims.
The invention relates to a process for the manufacture of a torsion vibration damper wherein a fly ring and a hub ring are produced and relatively rotatably connected by subsequent insertion of an elastic ring therebetween.
Torsion vibration dampers are used, for example, in pulleys mounted on internal combustion engine crankshafts to isolate belt driven accessories from vibrationscaused by uneven speed of the crankshaft. In a known process, the fly and hub rings are independently manufactured and subsequently fastened together by insertion of the elastic ring to be rotable relative to each other. The independent manufacture of the hub and fly rings in the form of separate parts is associated with significant cost.
It is now an object of the invention to provide a process for the manufacture of a torsion vibration damper of this general type which can be carried out at lower cost than the known process.
This object is achieved in accordance with the invention in a process of the above-mentioned generic type, wherein the hub and fly rings are produced as a single part with a nominal fracture line at a transition between the rings. The single part is divided into the hub and fly rings by fracturing along the nominal fracture line for the production of independent parts. The fracturing is carried out before or after insertion of the elastic ring and without removal of material. The hub and fly rings are preferably displaced relative to one another in axial direction for the braking of the single part along the nominal fracture line, for example, by the application of axial tension and/or pressure. For example, the elastic ring can be inserted into the intermediate gap defined by the hub and fly rings before braking apart of the rings and the resulting damper stored and shipped in this condition for the rings to be broken apart upon installation of the damper.
The mutual manufacture of the fly and hub rings in the form of a single part allows CA 022460~8 1998-09-30 the production in a single process step of the surfaces which in the finished torsion vibration damper are radially evenly spaced apart and together define the gap receiving the elastic ring. The gap can be manufactured, for example, by simultaneous machining of both surfaces. This prevents undesired tolerances within and between the respective gap wall diameters which are adversely cumulative andmay add up in such a way that the radial compression which is required for the securing of the subsequently inserted elastic ring is no longer sufficient for reliable fastening of the elastic ring. In the torsion vibration damper of the invention, the radial compression of the elastic ring can hereby be significantly better controlled than in torsion vibration dampers of the prior art. This is of great advantage for the achievement of a long service period.
The mutual manufacture of the fly ring and the hub ring in a single manufacturing operation further results in a significant reduction in manufacturing cost. Moreover, the hub and fly rings can be transported and stored as a single unit until the final insertion of the rubber ring. This significantly facilitates handling and further reduces cost. In addition, the braking of the single part along the nominal fracture line can also be integrated with the rubber ring insertion step, and possibly facilitate that step.
In the process in accordance with the invention, torsion vibration dampers can be manufactured wherein the fly ring radially outwardly surrounds the hub ring as well as dampers wherein the fly ring is positioned radially inward of the hub ring.
Furthermore, it can also be used for the manufacture of combined models which have a fly ring on the outside as well as the inside.
The radially opposite surfaces of the fly and hub rings which engage the elastic ring during the intended use are normally of cylindrical shape. However, other shapesare also easily achievable, for example, bell-shaped profiles.
The destruction of the nominal fracture line without machining in accordance with CA 022460~8 1998-09-30 the invention requires that the material of the fly and hub rings have a certainbrittleness. The use of iron-containing materials has been found especially suitable for this purpose.
The nominal fracture line between the fly ring and the hub ring is preferably provided as a bridge between the rings which has a wedge-shaped, pointed cross section inorder to ensure that the desired braking apart of the rings before or after the insertion of the elastic ring takes place at a very precisely defined location and without the braking off of loose material. In the preferred, finished torsion vibration damper, the edge of the fracture is always surrounded by a radially protruding surface of the fly ring or the hub ring to cover the fracture. Injuries due to careless handling of the damper or working in the vicinity of the torsion vibration damper, for example, during repairs of parts in the vicinity thereof are substantially prevented.
The outer appearance of the damper of the invention can otherwise be the same asthat of known torsion dampers. It is therefore possible, without problems, to provide teeth and/or a groove profile on the radially outer surface of one of the fly ring and the hub ring for connection of the finished torsion vibration damper with secondary devices, for example, by way of a belt drive.
In another aspect, the invention provides a torsion vibration damper precursor, including a fly ring and a hub ring, the rings being concentrically aligned and together defining an annular intermediate gap for insertion of an elastic ring, the precursor further including an annular bridge for rigidly connecting the hub ring with the fly ring, the annular bridge having a wedge shaped, pointed cross section todefine a nominal fracture line for permitting braking of the bridge for separation of the precursor into individual hub and fly rings.
In still another aspect of the invention, there is provided a torsion vibration damper, including a fly ring and a hub ring, the rings being concentrically aligned and together defining an intermediate gap, an elastic ring frictionally fastened in the gap, and an annular bridge for rigidly connecting the hub ring and the fly ring, the annular CA 022460~8 1998-09-30 bridge having a wedge-shaped, pointed cross section to define a nominal fractureline for permitting braking of the bridge for separation of the hub ring from the fly ring.
The process in accordance with the invention is further described in the following by way of example only and with reference to the drawing, wherein FIGS. 1 to 3 show a process for the manufacture of a torsion vibration damper inaccordance with the invention, wherein the fly ring radially outwardly surrounds the hub ring; and FIGS. 4 to 6 show a process for the manufacture of a torsion vibration damper of the invention wherein the hub ring radially outwardly surrounds the fly ring.
In the process illustrated in FIGS. 1 to 6, a single piece of material is used for the combined manufacture of the hub ring and the fly ring, which single piece is transformed into a shape as shown in FIGS. 1 to 4 by forging, casting and/or machining. The fly ring 1 and the hub ring 2 are thereby constructed as a single part and merge at an annular bridge 5 which has a wedge-shaped, reduced profile to define nominal fracture site 4. The one-piece fly and hub ring can be easily stored and shipped in this form.
FIGS. 2 and 5 illustrate that the fly ring 1 and the hub ring 2 have been separated from one another by a relative axial displacement and now form two mutually independent parts. The axial tension and/or pressure forces required for the separation of the two parts result in a chip-free destruction of the nominal fracture site 4. The separation can be very quickly achieved and does not create any loose fragments. The relative displacement can be carried out before or after the insertion of the elastic ring 3, which is preferably a rubber ring.
FIGS. 3 and 6 show two preferred embodiments of a finished torsion vibration CA 022460~8 1998-09-30 damper in accordance with the invention wherein a rubber ring 3 has been pressedunder elastic deformation into the radial gap 6 between the fly ring 1 and the hub ring 2. The radial compression of the rubber ring 3 is thereby adjusted by selection of the width of gap 6 so that a sliding movement of the rubber ring during relative rotation of the fly ring 1 with respect to the hub ring 2 is prevented. The total relative rotation of the fly ring 1 with respect to the hub ring 2 is exclusively achieved by elastic deformation of the rubber ring 3 for the purpose of dampening the causative vibration.
Of course, it is also possible to use a directly vulcanized-in rubber ring instead of an inserted rubber ring 3. For that embodiment, it is only necessary to place the fly ring and the hub ring in an appropriate vulcanization tool, to fill the remaining radial gap between the two rings with a vulcanizable rubber mass, and to solidify the rubber mass by vulcanization for connection thereof with the two rings 1, 2.
Changes and modifications in the specifically described embodiments can be carried out without departing from the scope of the invention which is intended to be limited only by the scope of the appended claims.
Claims (12)
1. Process for the manufacture of a torsion vibration damper including a fly ring, a hub ring and an intermediate elastic ring, comprising the steps of manufacturing the fly ring and the hub ring as a single part with a nominal fracture line in a transition region between the two rings, inserting the elastic ring between the two rings and braking the single part along the nominal fracture line without removal of material before or after insertion of the elastic ring.
2. Process according to claim 1 wherein the step of braking the single part is carried out prior to insertion of the elastic ring.
3. Process according to claim 1 wherein the step of braking the single part is carried out after insertion of the elastic ring.
4. Process according to claim 1 wherein one of the hub ring and the fly ring is axially displaced relative to the other of the hub ring and fly ring for braking of the single part along the nominal fracture line.
5. Process according to one of claims 1 to 4 wherein the elastic ring is a rubber ring.
6. Process according to claim 1 wherein the single part is broken along the nominal fracture line by application of at least one of axial tension and axial pressure to at least one of the hub ring and the fly ring.
7. Process according to claim 1 wherein the step of manufacturing the hub ring and the fly ring as a single part comprises the further step of simultaneously machining radially opposite surfaces of a gap for receiving the elastic ring.
8. Process according to claim 1 wherein the step of manufacturing the hub ring and the fly ring as a single part comprises the step of forming a bridge between the hub ring and the fly ring at the transition region, the bridge having a wedge-shaped cross section to define the nominal fracture line.
9. A torsion vibration damper precursor, comprising a fly ring and a hub ring, the rings being concentrically aligned and together defining an annular intermediate gap for insertion of an elastic ring, the precursor further including an annular bridge for rigidly connecting the hub ring with the fly ring, the annular bridge having a wedge shaped, pointed cross section to define a nominal fracture line for permitting braking of the bridge for separation of the precursor into individual hub and fly rings.
10. A precursor as defined in claim 9 wherein the bridge is made of a material which is sufficiently brittle to permit fracturing of the bridge along the nominal fracture line without the production of loose fragments.
11. A precursor as defined in claim 10, wherein the bridge is made of iron-containing material.
12. A torsion vibration damper, comprising a fly ring and a hub ring, the rings being concentrically aligned and together defining an intermediate gap, an elastic ring frictionally fastened in the gap, and an annular bridge for rigidly connecting the hub ring and the fly ring, the annular bridge having a wedge-shaped, pointed cross section to define a nominal fracture line for permitting braking of the bridge for separation of the hub ring from the fly ring.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19743686A DE19743686C2 (en) | 1997-10-02 | 1997-10-02 | Process for producing a torsional vibration damper |
| DE19743686.2 | 1997-10-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2246058A1 CA2246058A1 (en) | 1999-04-02 |
| CA2246058C true CA2246058C (en) | 2002-09-24 |
Family
ID=7844470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002246058A Expired - Fee Related CA2246058C (en) | 1997-10-02 | 1998-09-30 | Process for the manufacture of a torsion vibration damper |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0907039B1 (en) |
| CA (1) | CA2246058C (en) |
| DE (2) | DE19743686C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264260A (en) * | 2013-05-24 | 2016-01-20 | 株式会社捷太格特 | Method for manufacturing damper pulley and device for manufacturing damper pulley |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002313710B2 (en) * | 2001-08-03 | 2005-04-21 | The Gates Corporation | Crankshaft damper with integral pulse ring and method for production |
| US7681559B2 (en) * | 2006-12-21 | 2010-03-23 | Eaton Corporation | Torsion damping mechanism for a supercharger |
| DE102007013300A1 (en) * | 2007-03-16 | 2008-09-18 | Linnig Trucktec Gmbh | Friction clutch for fan wheel of motor vehicle, has damping device that is arranged between rotor and fan wheel of motor vehicle, where damping device has pretensioned gasket, and fan wheel of motor vehicle is connected with anchor disk |
| WO2008128513A1 (en) * | 2007-04-18 | 2008-10-30 | Neumayer Tekfor Holding Gmbh | Composite body |
| DE102013100450A1 (en) | 2013-01-17 | 2014-07-17 | Winkelmann Powertrain Components Gmbh & Co. Kg | Method for producing a torsional vibration damper |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60141532A (en) * | 1983-12-28 | 1985-07-26 | Toyoda Gosei Co Ltd | Manufacture of rubber spring with metal housing |
| DE3535859A1 (en) * | 1985-10-08 | 1987-04-09 | Schaeffler Waelzlager Kg | PULLEY WITH DAMPING ELEMENT |
| GB2233424B (en) * | 1989-06-29 | 1993-04-14 | Freudenberg Carl | Torsional vibration damper |
| DE4235074C1 (en) * | 1992-10-17 | 1993-11-11 | Freudenberg Carl Fa | Method of manufacturing a torsional vibration damper |
| DE4241156C1 (en) * | 1992-12-07 | 1994-04-07 | Metzeler Gimetall Ag | Production method for torsional vibration damper of IC engine crankshaft - involves producing single metal component which after introduction of rubber spring element has end face machined off to leave damper in completed form |
-
1997
- 1997-10-02 DE DE19743686A patent/DE19743686C2/en not_active Expired - Lifetime
-
1998
- 1998-07-15 DE DE59806262T patent/DE59806262D1/en not_active Expired - Lifetime
- 1998-07-15 EP EP98113159A patent/EP0907039B1/en not_active Expired - Lifetime
- 1998-09-30 CA CA002246058A patent/CA2246058C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105264260A (en) * | 2013-05-24 | 2016-01-20 | 株式会社捷太格特 | Method for manufacturing damper pulley and device for manufacturing damper pulley |
| US10094462B2 (en) | 2013-05-24 | 2018-10-09 | Jtekt Corporation | Damper pulley manufacturing method and damper pulley manufacturing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19743686C2 (en) | 2000-01-05 |
| EP0907039B1 (en) | 2002-11-13 |
| EP0907039A1 (en) | 1999-04-07 |
| CA2246058A1 (en) | 1999-04-02 |
| DE59806262D1 (en) | 2002-12-19 |
| DE19743686A1 (en) | 1999-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |