CA1310174C - Expanding probe with expandable seals - Google Patents
Expanding probe with expandable sealsInfo
- Publication number
- CA1310174C CA1310174C CA000572935A CA572935A CA1310174C CA 1310174 C CA1310174 C CA 1310174C CA 000572935 A CA000572935 A CA 000572935A CA 572935 A CA572935 A CA 572935A CA 1310174 C CA1310174 C CA 1310174C
- Authority
- CA
- Canada
- Prior art keywords
- tube
- probe
- probe according
- portions
- elements
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
- B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/02—Camshafts
Abstract
Abstract The invention proposes a fluid pressure loaded probe for expanding a tube in portions and for simultaneously fixing several outer design elements such as cams, bearings and gear wheels, comprising a basic cylindrical member as well as sealing members and spacer sleeves slid on alternately, with tube portions to be expanded being marked off from the tube portions remaining undeformed, by the sealing elements. In accordance with the invention, the probe is characterised by a device for bringing the spacer sleeves closer to each other axially while simultaneously compressing and radially expanding the sealing elements for pressing them against the inside of the tube, and by means for limiting the axial travel of at least part of the spacer sleeves relative to the basic probe member. In this way we provide a probe which permits simultaneous expansion of individual tube portions in accurate positions accurately associated with slid-on design elements and which, while having a simple design, provides improved sealing as compared to prior art probes for expanding several portions; it ensures stability of the seals and is easy to introduce into the tube.
Description
~3~ 7~
EXPANDING PROBE WITH EXPANDABLE SEALS
Descr ! et ion The invention relates to a fluld pressure loaded probe for expanding a tube in portions and for slmultaneously fixing several outer design elements such as cams, bearingsand gear wneels, comprising a basic cylTndrical member as well as sealing elements and spacer sleeves slId on alternately, with the tube port70ns to be expanded belng marked off from tube portions remaining undeformed, by the sealing elements.
A probe of the above-mentioned type is proposed In EP-A-0 213 529 describing a process for simultaneously fixing several drive elments, especlally cams, on a tube member by stmul-taneously expanding the tube member In portions. The problems connected with suitable sealing members are not dealt with in detail; the seals referred to are slmple O-rlngs made of rubber-elastic materials. Practical experience has shown that for such seals are not suitable/maklng probes available on a production basis because when pressure is applied, the seal-ing elements are squeezed Into the annular gap between the tube member and the basTc probe member, and In consequence they survive only a small nember of expanding operations.
There are various prior art probes for hydrau1ically ex-panding tubes for fixing them in tube bases, in the case of which O-rtngs of rubber-elastic materials, prior to being pressure-loaded, are radially expanded in order to bring the O-rings into sealing contact with the wall of the tube before the annular space occurring is loaded with a pressure fluid.
, ,.~ .
EXPANDING PROBE WITH EXPANDABLE SEALS
Descr ! et ion The invention relates to a fluld pressure loaded probe for expanding a tube in portions and for slmultaneously fixing several outer design elements such as cams, bearingsand gear wneels, comprising a basic cylTndrical member as well as sealing elements and spacer sleeves slId on alternately, with the tube port70ns to be expanded belng marked off from tube portions remaining undeformed, by the sealing elements.
A probe of the above-mentioned type is proposed In EP-A-0 213 529 describing a process for simultaneously fixing several drive elments, especlally cams, on a tube member by stmul-taneously expanding the tube member In portions. The problems connected with suitable sealing members are not dealt with in detail; the seals referred to are slmple O-rlngs made of rubber-elastic materials. Practical experience has shown that for such seals are not suitable/maklng probes available on a production basis because when pressure is applied, the seal-ing elements are squeezed Into the annular gap between the tube member and the basTc probe member, and In consequence they survive only a small nember of expanding operations.
There are various prior art probes for hydrau1ically ex-panding tubes for fixing them in tube bases, in the case of which O-rtngs of rubber-elastic materials, prior to being pressure-loaded, are radially expanded in order to bring the O-rings into sealing contact with the wall of the tube before the annular space occurring is loaded with a pressure fluid.
, ,.~ .
For instance, frorn DE 33 12 073 C2 a probe is known in the casa of which 0-rings are arranged in pairs and spaced apart by a spacer sleeve slid onto the probe body, with the 0-rings being able to stop against tensioning cones which may be brought closer to each other. Tapered rings which are positioned on the expanding cones and which may also be expanded radially serve as additional supporting rings. Because of the necessary length of the tensioning cones, such an expanding device is not really suitable for being used in connaction with probes for fixing several external design elements, nor are the 0-rings suitable as sealing elements, even with a greater Shore hardness.
As the 0-rings are fr~ely movable on the expanding cones in the axial direction, it~not possible accuractaly to determlna the position of the seals when final seal1ng contact has to be established. Therefore, in DE 34 08 8b3 C1, dealing with the same probe, both tensioning cones facing each other are unmovably fixed to the basic probe member, there is an additional pretensioning cone facing in the opposite direction and arranged on the basic probe member, and the spacer sleeve, the seals and the supporting rings are jointly movable in one direction relative to the basic probe member. The complicated shape of the basic probe member represents a disadvantage, and it is not possible to arrange multiple devices of this design on one probe. Tne 0-rings used are not suitable for the application mentioned ini~ially. Finally, EP 00 55 101 B1 discloses a probe which, similar to previously mentioned probes,operates with 0-rings which are to run up against expanding cones. This happens exclusively as a result of the internal pressure applied. In this case, too, the uncertain axial position of the seal when achieving the sealing effect relative to the tube body is disadvantageous.
The rubber-elastic 0-rings are unsuitable for the reasons mentioned above.
It is the object of the present invent70n to provide â probe for simultaneously hydraulically expanding several individual longitudinal portlons for the purpose of fixing design elements of the above-clescribed type, which simultaneously permits ~ . .
L
position-accura~e expansion of the individual tube portions so that they are accurately associated with the slid-on design elements and which, while haviny a simple design, provides improved sealing as compared to prior art probes for expanding several longitudinal portions, ensures stable positioning of the seals and an easy introduction of the probe into the tube.
The objective is achieved by providing a probe which is character-ised by a device for bringing the spacer sleeves closerto each other axially while simultaneously compressing and radially expanding the sealing elements for pressing them against the inside of the tube,and by means for limiting the axial travel of at least part of the spacer sleeves relative to the basic probe member. Such a probe design ensures that in a pre-determined position with a small axlal tolerance, the sealing elements arranged in pairs can be brought into sealing contact with the tube and that the forces applied to the sealing elements for expanding purposes remain within certain narrow limits.
According to a first preferred embodiment, a spacer sleeve positioned between the regions to be expanded comprises means for limiting the axial travel, which may consist of radially inserted pins engaging axial grooves of limited length in the basic probe member. Easy assembly of the modular probe is essentially not adversely affected as the stop pins may be threaded for example. According to a further advantageous embodIment, the said pins may contain bores, thereby being suitable for feeding pressure fluid into the portions to be expanded and marked off by the sealing elements and/or for draining leaking fluid from the portions positioned in between and remaining unde-formed.
In a further advantageous embodiment, the seals are axially layered, with the outwardly facing part viewed from the pressure loaded annular space having a greater hardness in order to avoid the familiar feature of material flowing away into the annular gap, thereby embracing~inner more flexible part so as to produce an approximately U-shaped cross-section.
, ~3~7~
According to a second preferred embodIment, the means for limiting the axial travel comprise pressure spring elements which are positioned wlthin the sealing elements and which have to be wlth each other, brought into to contact /thereby limiting the travel of the spacer sleeves relative to each other and thus relative to the basic member. In an advantageous embodiment, these elements are designed as conical annulardiscs which, due to axial compression, are at the same time increased in their radial size and act as sealing elements themselves.
A preferred embodiment comprises a package of several such discs the interior of which comprises a harder material producing the returning forces and whose exterior is provided with a softer sealing support. The conical rings are arranged that in such a way/in the load-relieved condition, as viewed from the fluid pressure loaded annular chamber, they comprise outwardly positioned Imaginary conical points.
The device for bringing the spacer sleeves axially closer together preferably comprises a stop which~axially movable on the basic member and which cooperates with a stop which is axially fixed relative to the basic member, with both of them embracing the sealing elements and the spacer sleeve.
It is particularly advantageous for the spacer sleeves of the probe to be designed as straight tubular pieces with axially normal end faces. Whereas the axially movable stop may directly act on an outer spacer sleeve, it is possible for the axially fixed stop to act on a specially designed design element slid on to the tube end, for example a driving pinion with a sleeve-shaped projection.
Preferred embodiments of the invention are illustrated in the drawing wherein Fig. 1 is a longitudinal section of a probe in accordance with the invention.
. . ~ ..
~ r~
--5~
Fig. 2 shows a probe portion to Fig. 1 in a first embodiment in a larger scale.
Fig. 3 gives details to Fig. 2 in a larger scale.
Fig. 4 shows a probe portion to Fig. 1 in a second embodiment in the course of being expanded, in a larger scale.
ig. 5 illustrates details to Fig. 4 in a larger scale.
Fig. 1 shows a probe wtth a slid-on camshaft for a six cylinder engine, with the camshaft consisting of a tube 1, double cams 2 to be fixed on it and a drive plnion 3 combined with a double cam, with the drive pinion 3 being slid on to the tube end in a sleeve-like way.
As can be seen in Fig. 2, the probe consists of a bas;c member 41 with axially extending channels 42 for 5uppl y i ng pressure fluid and draining off fluid leakages,as well as slid-on spacer sleeves 43 and sealing assemblies 44. In accordance with the positions of the portions to be expanded pre-determTned by the positions of the cams 2, spacer sleeves 43, 45 of changing lengths have been slid on between which the seals 44 arranged in pairsare positioned. The last of the spacer sleeves is axially supported on a shoulder 31 of the pinion 3 which itself rests against a fTxed stop, and the device further comprises a stop 6 which is axially movable relative to the basic probe member and which is shown in two positions. Dis-placement of the stop 6 results in the chain of spacer sleeves 43, 35 coming closer to each other, thereby causTng the sealIng elements to be compressed and expanded, as can be seen in the following Figures.
The details to Fig. 3 indicate that the seals 44 consists of a first ring 441 made of a harder, more resistant material and of a second ring 441 made of a rubber-elastic material and positioned towards the pressure loaded annular space.
~ 3 ~
Whereas the sealing element illustrated on the left indicates the condition prior to pretensioning the sealIng elements with a greater axial length, the sealing element shown on the right is shortened, which results in a radial expansion and firm contact with the wall of the tube 4. As far as the spacer sleeve 43 is concerned it can be seen that a sleeve-like pin 431 has been inserted into a bore which engages an axial gr~ove 411 in the basic probe member 41, thereby lImiting axial travel. The inner bore of the pin 431 is connected to the discharge channel 42 for rernoving fluid leakages.
Fig. 4 which is otherwise similar to Fig. 2 shows a probe with sealing elements 46 consisting of individual annular discs which in the positions shown limit the movement of the spacer sleeves 43, 45 towards each other.
As can be seen in the detail to Fiy. 5, the sealing elements 46, as shown on the left, consist of individual conical annular discs 461 and outer sealing supports 462, with the inner rings of a greater radial diameter producing returning forces in the course of deformation and accurately limiting axial approach of the spacer sleeves because of their greater strength. This can be seen in the compressed conditton shown on the right:
the originally conical discs 461 now have an essentially planar shape, whereas the outer supports 462 sealingly rest against the tube body 1.
.
As the 0-rings are fr~ely movable on the expanding cones in the axial direction, it~not possible accuractaly to determlna the position of the seals when final seal1ng contact has to be established. Therefore, in DE 34 08 8b3 C1, dealing with the same probe, both tensioning cones facing each other are unmovably fixed to the basic probe member, there is an additional pretensioning cone facing in the opposite direction and arranged on the basic probe member, and the spacer sleeve, the seals and the supporting rings are jointly movable in one direction relative to the basic probe member. The complicated shape of the basic probe member represents a disadvantage, and it is not possible to arrange multiple devices of this design on one probe. Tne 0-rings used are not suitable for the application mentioned ini~ially. Finally, EP 00 55 101 B1 discloses a probe which, similar to previously mentioned probes,operates with 0-rings which are to run up against expanding cones. This happens exclusively as a result of the internal pressure applied. In this case, too, the uncertain axial position of the seal when achieving the sealing effect relative to the tube body is disadvantageous.
The rubber-elastic 0-rings are unsuitable for the reasons mentioned above.
It is the object of the present invent70n to provide â probe for simultaneously hydraulically expanding several individual longitudinal portlons for the purpose of fixing design elements of the above-clescribed type, which simultaneously permits ~ . .
L
position-accura~e expansion of the individual tube portions so that they are accurately associated with the slid-on design elements and which, while haviny a simple design, provides improved sealing as compared to prior art probes for expanding several longitudinal portions, ensures stable positioning of the seals and an easy introduction of the probe into the tube.
The objective is achieved by providing a probe which is character-ised by a device for bringing the spacer sleeves closerto each other axially while simultaneously compressing and radially expanding the sealing elements for pressing them against the inside of the tube,and by means for limiting the axial travel of at least part of the spacer sleeves relative to the basic probe member. Such a probe design ensures that in a pre-determined position with a small axlal tolerance, the sealing elements arranged in pairs can be brought into sealing contact with the tube and that the forces applied to the sealing elements for expanding purposes remain within certain narrow limits.
According to a first preferred embodiment, a spacer sleeve positioned between the regions to be expanded comprises means for limiting the axial travel, which may consist of radially inserted pins engaging axial grooves of limited length in the basic probe member. Easy assembly of the modular probe is essentially not adversely affected as the stop pins may be threaded for example. According to a further advantageous embodIment, the said pins may contain bores, thereby being suitable for feeding pressure fluid into the portions to be expanded and marked off by the sealing elements and/or for draining leaking fluid from the portions positioned in between and remaining unde-formed.
In a further advantageous embodiment, the seals are axially layered, with the outwardly facing part viewed from the pressure loaded annular space having a greater hardness in order to avoid the familiar feature of material flowing away into the annular gap, thereby embracing~inner more flexible part so as to produce an approximately U-shaped cross-section.
, ~3~7~
According to a second preferred embodIment, the means for limiting the axial travel comprise pressure spring elements which are positioned wlthin the sealing elements and which have to be wlth each other, brought into to contact /thereby limiting the travel of the spacer sleeves relative to each other and thus relative to the basic member. In an advantageous embodiment, these elements are designed as conical annulardiscs which, due to axial compression, are at the same time increased in their radial size and act as sealing elements themselves.
A preferred embodiment comprises a package of several such discs the interior of which comprises a harder material producing the returning forces and whose exterior is provided with a softer sealing support. The conical rings are arranged that in such a way/in the load-relieved condition, as viewed from the fluid pressure loaded annular chamber, they comprise outwardly positioned Imaginary conical points.
The device for bringing the spacer sleeves axially closer together preferably comprises a stop which~axially movable on the basic member and which cooperates with a stop which is axially fixed relative to the basic member, with both of them embracing the sealing elements and the spacer sleeve.
It is particularly advantageous for the spacer sleeves of the probe to be designed as straight tubular pieces with axially normal end faces. Whereas the axially movable stop may directly act on an outer spacer sleeve, it is possible for the axially fixed stop to act on a specially designed design element slid on to the tube end, for example a driving pinion with a sleeve-shaped projection.
Preferred embodiments of the invention are illustrated in the drawing wherein Fig. 1 is a longitudinal section of a probe in accordance with the invention.
. . ~ ..
~ r~
--5~
Fig. 2 shows a probe portion to Fig. 1 in a first embodiment in a larger scale.
Fig. 3 gives details to Fig. 2 in a larger scale.
Fig. 4 shows a probe portion to Fig. 1 in a second embodiment in the course of being expanded, in a larger scale.
ig. 5 illustrates details to Fig. 4 in a larger scale.
Fig. 1 shows a probe wtth a slid-on camshaft for a six cylinder engine, with the camshaft consisting of a tube 1, double cams 2 to be fixed on it and a drive plnion 3 combined with a double cam, with the drive pinion 3 being slid on to the tube end in a sleeve-like way.
As can be seen in Fig. 2, the probe consists of a bas;c member 41 with axially extending channels 42 for 5uppl y i ng pressure fluid and draining off fluid leakages,as well as slid-on spacer sleeves 43 and sealing assemblies 44. In accordance with the positions of the portions to be expanded pre-determTned by the positions of the cams 2, spacer sleeves 43, 45 of changing lengths have been slid on between which the seals 44 arranged in pairsare positioned. The last of the spacer sleeves is axially supported on a shoulder 31 of the pinion 3 which itself rests against a fTxed stop, and the device further comprises a stop 6 which is axially movable relative to the basic probe member and which is shown in two positions. Dis-placement of the stop 6 results in the chain of spacer sleeves 43, 35 coming closer to each other, thereby causTng the sealIng elements to be compressed and expanded, as can be seen in the following Figures.
The details to Fig. 3 indicate that the seals 44 consists of a first ring 441 made of a harder, more resistant material and of a second ring 441 made of a rubber-elastic material and positioned towards the pressure loaded annular space.
~ 3 ~
Whereas the sealing element illustrated on the left indicates the condition prior to pretensioning the sealIng elements with a greater axial length, the sealing element shown on the right is shortened, which results in a radial expansion and firm contact with the wall of the tube 4. As far as the spacer sleeve 43 is concerned it can be seen that a sleeve-like pin 431 has been inserted into a bore which engages an axial gr~ove 411 in the basic probe member 41, thereby lImiting axial travel. The inner bore of the pin 431 is connected to the discharge channel 42 for rernoving fluid leakages.
Fig. 4 which is otherwise similar to Fig. 2 shows a probe with sealing elements 46 consisting of individual annular discs which in the positions shown limit the movement of the spacer sleeves 43, 45 towards each other.
As can be seen in the detail to Fiy. 5, the sealing elements 46, as shown on the left, consist of individual conical annular discs 461 and outer sealing supports 462, with the inner rings of a greater radial diameter producing returning forces in the course of deformation and accurately limiting axial approach of the spacer sleeves because of their greater strength. This can be seen in the compressed conditton shown on the right:
the originally conical discs 461 now have an essentially planar shape, whereas the outer supports 462 sealingly rest against the tube body 1.
.
Claims (12)
1. A fluid pressure loaded probe for expanding a tube in portions and for simultaneously fixing several outer design elements such as cams, bearings and gear wheels, comprising a cylindrical basic member having sealing elements and spacer sleeves slid onto it alternately, with tube portions to be expanded being marked off by the sealing elements from tube portions remaining undeformed, characterised by a device for bringing the spacer sleeves closer to each other axially while simultaneously compressing and radially expanding the sealing elements for pressing them against the inside of the tube, and by means for limiting the axial travel of at least part of the spacer sleeves relative to the basic member.
2. A probe according to claim 1, wherein the travel limiting means comprise pins which are inserted radially into the spacer sleeves and which engage axial grooves of a limited length in the basic member.
3. A probe according to claim 2, wherein the pins in the spacer sleeves comprise longitudinal boreholes for the purpose of feeding pressure fluid into the portions to be expanded and marked off by the sealing elements and/or for draining off fluid leakages from the portions positioned in between and remaining undeformed.
4. A probe according to claim 2 or 3, wherein the sealing elements each consist of a softer expanding part positioned inwardly towards the fluid pressure loaded portion to be sealed and a harder supporting part positioned outwardly towards the unloaded portions.
5. A probe according to claim 4, wherein the harder supporting part embraces the softer expanding part so as to produce a U-shaped cross-section.
6. A probe according to claim 1, wherein the travel limiting means comprise pressure spring elements positioned within the sealing elements and suitable for acting as stop elements.
7. A probe according to claim 6, wherein the sealing elements and the pressure spring elements jointly consist of preferably layered conical expanding rings.
8. A probe according to claim 7, wherein the conical expanding rings consist of a harder spring ring of a greater radial diameter and of an externally positioned softer sealing support.
9. A probe according to claim 2 or 6, wherein the device comprises at least one stop which is axially movable on the basic member and which cooperates with a stop axially fixed opposite the basic member.
10. A probe according to claim 2 or 6, wherein the spacer sleeves are straight tube pieces with axially normal end faces.
11. A probe according to claim 2 or 6, wherein the movable stop acts directly on an outer spacer sleeve.
12. A probe according to claim 2 or 6, wherein the fixed stop acts on a design element slid over the tube end.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873724904 DE3724904A1 (en) | 1987-07-28 | 1987-07-28 | EXPANDING PROBE WITH SPREADABLE SEALS |
| DEP3724904.5-14 | 1987-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1310174C true CA1310174C (en) | 1992-11-17 |
Family
ID=6332489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000572935A Expired - Lifetime CA1310174C (en) | 1987-07-28 | 1988-07-25 | Expanding probe with expandable seals |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0301425B1 (en) |
| JP (1) | JPH0241725A (en) |
| KR (1) | KR890001654A (en) |
| BR (1) | BR8803722A (en) |
| CA (1) | CA1310174C (en) |
| DE (2) | DE3724904A1 (en) |
| ES (1) | ES2028956T3 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3716986A1 (en) * | 1987-05-21 | 1988-12-15 | Emitec Emissionstechnologie | DEVICE FOR HYDRAULIC EXPANSION |
| US5363544A (en) * | 1993-05-20 | 1994-11-15 | Benteler Industries, Inc. | Multi-stage dual wall hydroforming |
| DE19802484C2 (en) * | 1998-01-23 | 2000-06-08 | Daimler Chrysler Ag | Method and device for producing assembled camshafts |
| DE19821807C2 (en) * | 1998-05-15 | 2000-10-19 | Daimler Chrysler Ag | Built expanding lance |
| DE19905849C1 (en) * | 1999-01-07 | 2000-04-20 | Alusuisse Lonza Services Ag | Hollow profile component transforming unit comprises a stamper section with a flexible plastic section which forms part of its outer area |
| DE10338385B4 (en) * | 2003-08-21 | 2006-09-21 | Daimlerchrysler Ag | sealing arrangement |
| DE102020209633A1 (en) * | 2020-07-30 | 2022-02-03 | Mahle International Gmbh | Process for producing an injection channel in a corrugated tube |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE923964C (en) * | 1942-04-24 | 1955-02-24 | Sulzer Ag | Method and device for fastening and sealing pipes in a wall |
| IT1131143B (en) * | 1980-05-06 | 1986-06-18 | Nuovo Pignone Spa | PERFECTED METHOD FOR THE SEALING OF A SLEEVE FLANGED TO A PIPE, PARTICULARLY SUITABLE FOR REPAIRING SUBMARINE PIPES INSTALLED AT LARGE DEPTHS |
| US4414739A (en) * | 1980-12-19 | 1983-11-15 | Haskel, Incorporated | Apparatus for hydraulically forming joints between tubes and tube sheets |
| JPS5919536U (en) * | 1982-07-28 | 1984-02-06 | 佐野 英一 | carrier bag |
| DE3312073C2 (en) * | 1983-04-02 | 1985-02-07 | Wilfried 4630 Bochum Busse | Pressure build-up mandrel for pressure-tight fastening of a pipe |
| DE3408863C1 (en) * | 1984-03-10 | 1985-06-05 | Wilfried 4630 Bochum Busse | Pressure build-up mandrel for securing a tube in a tube plate or the like |
| DE3530600A1 (en) * | 1985-08-27 | 1987-03-05 | Interatom | METHOD FOR FIXING DRIVE ELEMENTS ON A HOLLOW SHAFT |
-
1987
- 1987-07-28 DE DE19873724904 patent/DE3724904A1/en active Granted
-
1988
- 1988-07-22 EP EP88111821A patent/EP0301425B1/en not_active Expired - Lifetime
- 1988-07-22 DE DE8888111821T patent/DE3868450D1/en not_active Expired - Lifetime
- 1988-07-22 ES ES198888111821T patent/ES2028956T3/en not_active Expired - Lifetime
- 1988-07-25 CA CA000572935A patent/CA1310174C/en not_active Expired - Lifetime
- 1988-07-27 JP JP63185689A patent/JPH0241725A/en active Granted
- 1988-07-27 KR KR1019880009456A patent/KR890001654A/en not_active Application Discontinuation
- 1988-07-27 BR BR8803722A patent/BR8803722A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| ES2028956T3 (en) | 1992-07-16 |
| DE3724904A1 (en) | 1989-02-09 |
| JPH0362492B2 (en) | 1991-09-26 |
| EP0301425A1 (en) | 1989-02-01 |
| DE3724904C2 (en) | 1991-03-21 |
| DE3868450D1 (en) | 1992-03-26 |
| JPH0241725A (en) | 1990-02-09 |
| KR890001654A (en) | 1989-03-28 |
| BR8803722A (en) | 1989-02-14 |
| EP0301425B1 (en) | 1992-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |