CA1291954C - Protective device for pipe ends - Google Patents
Protective device for pipe endsInfo
- Publication number
- CA1291954C CA1291954C CA000570882A CA570882A CA1291954C CA 1291954 C CA1291954 C CA 1291954C CA 000570882 A CA000570882 A CA 000570882A CA 570882 A CA570882 A CA 570882A CA 1291954 C CA1291954 C CA 1291954C
- Authority
- CA
- Canada
- Prior art keywords
- insert
- cover
- protective device
- peripheral
- seal
- 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
- 230000001681 protective effect Effects 0.000 title claims abstract description 46
- 239000002184 metal Substances 0.000 claims abstract description 54
- 239000013536 elastomeric material Substances 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 28
- 210000002105 tongue Anatomy 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 10
- 230000004308 accommodation Effects 0.000 claims description 6
- 230000001012 protector Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000969 carrier Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 229940042472 mineral oil Drugs 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D59/00—Plugs, sleeves, caps, or like rigid or semi-rigid elements for protecting parts of articles or for bundling articles, e.g. protectors for screw-threads, end caps for tubes or for bundling rod-shaped articles
- B65D59/06—Caps
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
- F16L57/005—Protection of pipes or objects of similar shape against external or internal damage or wear specially adapted for the ends of pipes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Cable Accessories (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Gasket Seals (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Buffer Packaging (AREA)
Abstract
A protective device for pipe-ends comprises, depending upon whether it is used as a cap or a plug, a metal housing having a sleeve-like insert of elastomeric material or a metal plug having a sleeve-like cover of elastomeric material. In order to improve the stability of the protective device, the metal housing or metal plug, each of which is of tubular design, comprises, at the outer end, a knurled or folded edge, preferably in the form of a rolled edge. In order to facilitate production of the protective device, the insert or cover may consist of at least two partly cylindrical casing parts adapted to be joined together.
Description
7466-88 ~2919S~
TITLE: PROTECTIVE DEVICE FOR PIPE-ENDS
SPECIFICATION
The invention relates to a protective device for pipe-ends according to the preamble to claim 1.
Protective devices consisting of a metal housing and a one-piece insert, or of a metal plug and a one-piece sleeve-like cover, have long been known, cf. German Patent 29.39 384 and German OS 28 00 747. The disadvantage of these is that the inserts and covers must be produced with rela-tively costly tools and either the cover of the thread must be screwed out of the injection-moulding, or the insert or the coating must be screwed from the core. Because of their complex design, tools with so-called drop-out cores can be used economically only for the production of large numbers of devices.
Moreover only plastic protective devices have been known for a long time.
Protective devices with one-piece inserts or covers, and protective devices made only out of plastic, also have the disadvantage that, as a result of contraction of the plastic, they are difficult to remove, and even more diffi-cult to f~t, at low temperatures. When such protectivedevices are used for mineral-oil pipes at widely varying temperatures, this may lead to considerable problems, espec-ially when large-diameter pipes are involved.
Also known are protective devices in which the metal housing or metal plug is simply bent over at the upper edge, in order to provide increased stability for the protec-tive caps or plugs. In many cases, especially with large-diameter or very heavy pipes, however, the stability obtained is not enough to protect the pipe-end and the thread effect-ively against impact damage.
3~
~Z91954 It is therefore the purpose of the present inven-tion to design a protective device of the type mentioned at the beginning hereof in such a manner as to achieve increased stability and as to facilitate production.
This purpose is accomplished as indicated in the characterizing portion of claim 1. Production is substant-ially facilitated by the designs according to Figs. 3 to 6.
Advantageous and practical developments appear in the remain-ing claims.
Protective devices of the type given in claim 1 and sub-claims 2 to 5 are considerably more stable than hitherto-known devices, because of the knurled, folded or rolled edges.
The design according to claims 6 to 9 makes it possible to produce inserts or plugs with simple tools which are less costly to make than those used in the prior art.
These tools need be provided merely with ejector-pins for removal of the parts from the injection-moulds. Cooling times and production times may thus be substantially shortened.
The metal housings and metal plugs according to the invention are equally advantageous for use with inserts and covers made in one or more parts.
The grooves formed in the insert may be used, for example to insert an end, in order to form a closed protec-tive cap from an open protective cap. Separate sealing elements may also be placed in the grooves, as may be gathered from claim 9. Thin-walled webs applied by injection moulding may also be provided as axial sealing rings instead of these sealing elements.
The development according to claim 10 makes it possible to push a rod-shaped auxiliary tool through for the purpose of fitting and removing protective devices. In this case, the bent-out tongues serve to reinforce the surfaces of the auxiliary tools. They also act as carriers for the plastic insert, since they bear against the lateral bound-aries of the insert or cover.
7466-88 -3_ lZ9195~
The development according to claim 11 makes it possible to secure the insert or cover particularly satis-factorily to the metal body in the axial direction.
The devices according to Figs. 14 and 15 are part-icularly advantageous.
The invention will be explained hereinafter in greater detail in conjunction with the example of embodiment illustrated in the drawing attached hereto, wherein:
Fig. 1 shows a first example of a two-piece insert for a protective device according to the invention;
Fig. 2 is a plan view of one of the two supporting surfaces of one half of the insert according to Fig.1;
Fig. 3 shows a second example of an insert according to the invention;
Fig. 4 is a third example of an insert according to the invention;
Fig. 5 shows a fourth example;
Fig. 6 is a diagrammatical representation of a first example of a metal housing for the protective device according to the invention;
Fig. 7 is an axial section through the metal hoùsing according to Fig.6;
Fig. 8 shows a second example of a metal housing;
Fig. 9 shows a third example of a metal housing;
Fig.10 is a perspective view of an insert consisting of two halves;
Fig.11 is a perspective representation of a metal housing adapted to fit over an insert accord-ing to Fig.10;
Fig.12 is a first example of a cylindrical metal plug for a protective device according to the invention;
Fig.13 is a section of the metal plug according to Fig.12;
Fig.14 is a second example of a metal plug;
Fig.15 is a third example of a metal plug;
Fig.16 is another example of a protective cap;
Fig.17 is still another example of a protective cap;
As far as technically practical, similar compon-ents in the drawings bear the same reference numerals.
The drawing shows, in Figs. 1 to 5 and 10, and insert 2 consisting of two halves 4,6 for a metal housing 8 according to Figs. 6 to 9 and 11. Each half of the insert is semi-cylindrical and has a thickened end 10. A thread 12 is formed on the internal surface. A peripheral groove 14 may be formed on the external surface.
Each half has two'stop-surfaces 16,18 and 16',18'.
Only that marked 16,16' is to be seen in Figs. 1 to S.
The stop-surfaces of the one insert-half 4 comprise a groove 20 and the stop-surfaces of the other insert-half comprise a matching tongue 22. One of the stop-surfaces of insert-halves 4 and 6 may also be provided with a groove and the other stop-surface may be provided with a corresponding tongue.
In the vicinity of thickened end 10, the tongue and groove exhibit bends or deflections 24 which are directed radially inwardly.
Insert-halves 4 and 6 according to Figs. 1 and 2 also comprises grooves 26 internally in the vicinity of thickened end 10.
When the two insert-halves are in the assembled condition, groove 26 forms an internal peripheral groove into which a plastic cover 28, for example, may be inserted in order to form a closed protective cap as shown in Fig.3.
12919~4 The cover may also be in the form of a pot 30, as shown in Fig. 5.
Fig.5 shows an example of embodiment in which a lip-seal 30 is inserted into groove 26, the said seal exhib-iting a lip projecting sealingly over the sealing gap 32 between the pipe 34 and insert 2.
The thickened end of each insert-half is provided with a rectangular recess 38, 38'. This may be gathered particularly clearly from Fig.10 which shows insert-halves 4 and 6 in the assembled condition.
Reference should now be made to Figs.6,9 and 11 showing various examples of embodiment of me~tal housing 8.
Fig.6 shows a metal housing, the outer front edge of which is provided with an inwardly rolled edge 40. Cylindrical metal housing 8 comprises, below the said rolled edge, two diamet-rically opposite openings 42, 42' with two tongues 44,46 bent laterally inwarldly, as may be gathered particularly clearly from Figs.7 and 11. When metal housing 8 is fitted to insert 2, cf. Figs.10 and 11, tongues 44 and 46 engage in recesses 38, 38', thus producing a locking effect in the peripheral direction. During fitting and removal of the protective device, a rod-shaped tool may be inserted through openings 42, 42' and recesses 38, 38'.
The lower part of the metal housing carries inwardly directed tongues 48 distributed peripherally. These engage in peripheral groove 14 in insert 2, thus providing axial locking.
In the example of embodiment according to Fig.8, the rolled edge is spiral 50 and the said spiral may be carried far enough to fill the cavity entirely.
Fig.9 shows a rolled edge in the form of an oval 52.
Figs.12 to 16 show a hollow-cylindrical metal plug 54, the outer end of which comprises an outwardly rolled edge 56. The said plug is surrounded by cover-halves which are not shown but are identical with insert-halves 4 and 6 according to Figs.1 to 5. Metal plug 54 has two diametric-ally opposite openings 58 with tongues 60,62 directed laterally outwardly, see Fig.13 also. As in the case of metal housing 8, these tongues engage in corresponding recesses in the cover, not shown.
Figs. 14 and 15 show two further examples of the metal plug. In the case of Fig.14, the rolled edge is in the form of a spiral 64, whereas in the case of Fig.15 it is in the form of an oval 66.
In order also to seal the protective device from pipe 34 at the end remote from the front end and at the beginning of thread 68, insert 2 may comprise at this end, internally, a peripheral groove for an 0-ring 72, as shown in Fig.4 in broken lines for insert-half 6; or it may comprise, at this end 68, internally, a moulded-on, peripheral sealing web 74 converging to an edge, as shown in broken lines in Fig.3 for insert-halves 6.
In a similar manner, the cover in a protective plug may comprise, externally, a groove for an 0-ring or for a moulded-on, peripheral sealing web, not shown in the draw-ing.
Fig.16 shows a cross-section of a protective cap 80 comprising a hollow-cylindrical metal housing 82 with a sleeve-like insert 84 made of an elastomeric material and bearing closely against the metal housing. At its outer end, metal cylinder 82 comPrises an inwardly bent knurled edge 86.
Insert 84 projects into the knurling of knurled edge 86 in such a manner that the inwardly bent part of the knurled edge lZ91954 7466-88 -7~
overlaps the end of the insert and the free edge 88 engages in the insert or bears clampingly against it. Insert 84 comprises internally a peripheral stop 90 for pipe-end 92. A
space 94, in the form of a groove, is left between stop 90 and knurled edge 86 of metal housing 82, in which space a removable resilient cover 96 may be engaged. As in the example according to Fig. 5, stop 90 comprises a peripheral seal 30 which cover sealing gap 32 between the said stop and pipe-end 92.
Fig. 17 shows a cross-section of a protective plug 100 comprising a hollow-cylindrical metal plug 102 with a sleeve-like cover 104 made of an elastomeric material. The end of the hollow-cylindrical metal plug carries an outwardly bent knurled edge 106. Cover 104 projects into the knurling of knurled edge 106 in such a manner that the outwardly bend part of the knurled edge overlaps the end of cover 104 and free knurled edge 107 engages in the cover or bears clamp-ingly against it. Cover 104 exhibits, externally, aperipheral stop 108 for pipe-end 110. The metal plug exhib-its, internally and in the vicinity of knurled edge 106, a peripheral recess or a plurality of spaced recesses 112 in which a removable resilient cover 114, having a peripheral rib or a plurality of spaced projections 114, may be engaged.
Formed onto the annular pipe-stopping surface of stop 108, for the purpose of covering the gap between the stop and the pipe-end, is a peripheral seal 118 in the form of a sealing lip which, when not under load, points obliquely outwardly ~shown broken lines). However, a groove 120 (shown in broken lines) may also be arranged there for the accommodation of an insertable seal.
TITLE: PROTECTIVE DEVICE FOR PIPE-ENDS
SPECIFICATION
The invention relates to a protective device for pipe-ends according to the preamble to claim 1.
Protective devices consisting of a metal housing and a one-piece insert, or of a metal plug and a one-piece sleeve-like cover, have long been known, cf. German Patent 29.39 384 and German OS 28 00 747. The disadvantage of these is that the inserts and covers must be produced with rela-tively costly tools and either the cover of the thread must be screwed out of the injection-moulding, or the insert or the coating must be screwed from the core. Because of their complex design, tools with so-called drop-out cores can be used economically only for the production of large numbers of devices.
Moreover only plastic protective devices have been known for a long time.
Protective devices with one-piece inserts or covers, and protective devices made only out of plastic, also have the disadvantage that, as a result of contraction of the plastic, they are difficult to remove, and even more diffi-cult to f~t, at low temperatures. When such protectivedevices are used for mineral-oil pipes at widely varying temperatures, this may lead to considerable problems, espec-ially when large-diameter pipes are involved.
Also known are protective devices in which the metal housing or metal plug is simply bent over at the upper edge, in order to provide increased stability for the protec-tive caps or plugs. In many cases, especially with large-diameter or very heavy pipes, however, the stability obtained is not enough to protect the pipe-end and the thread effect-ively against impact damage.
3~
~Z91954 It is therefore the purpose of the present inven-tion to design a protective device of the type mentioned at the beginning hereof in such a manner as to achieve increased stability and as to facilitate production.
This purpose is accomplished as indicated in the characterizing portion of claim 1. Production is substant-ially facilitated by the designs according to Figs. 3 to 6.
Advantageous and practical developments appear in the remain-ing claims.
Protective devices of the type given in claim 1 and sub-claims 2 to 5 are considerably more stable than hitherto-known devices, because of the knurled, folded or rolled edges.
The design according to claims 6 to 9 makes it possible to produce inserts or plugs with simple tools which are less costly to make than those used in the prior art.
These tools need be provided merely with ejector-pins for removal of the parts from the injection-moulds. Cooling times and production times may thus be substantially shortened.
The metal housings and metal plugs according to the invention are equally advantageous for use with inserts and covers made in one or more parts.
The grooves formed in the insert may be used, for example to insert an end, in order to form a closed protec-tive cap from an open protective cap. Separate sealing elements may also be placed in the grooves, as may be gathered from claim 9. Thin-walled webs applied by injection moulding may also be provided as axial sealing rings instead of these sealing elements.
The development according to claim 10 makes it possible to push a rod-shaped auxiliary tool through for the purpose of fitting and removing protective devices. In this case, the bent-out tongues serve to reinforce the surfaces of the auxiliary tools. They also act as carriers for the plastic insert, since they bear against the lateral bound-aries of the insert or cover.
7466-88 -3_ lZ9195~
The development according to claim 11 makes it possible to secure the insert or cover particularly satis-factorily to the metal body in the axial direction.
The devices according to Figs. 14 and 15 are part-icularly advantageous.
The invention will be explained hereinafter in greater detail in conjunction with the example of embodiment illustrated in the drawing attached hereto, wherein:
Fig. 1 shows a first example of a two-piece insert for a protective device according to the invention;
Fig. 2 is a plan view of one of the two supporting surfaces of one half of the insert according to Fig.1;
Fig. 3 shows a second example of an insert according to the invention;
Fig. 4 is a third example of an insert according to the invention;
Fig. 5 shows a fourth example;
Fig. 6 is a diagrammatical representation of a first example of a metal housing for the protective device according to the invention;
Fig. 7 is an axial section through the metal hoùsing according to Fig.6;
Fig. 8 shows a second example of a metal housing;
Fig. 9 shows a third example of a metal housing;
Fig.10 is a perspective view of an insert consisting of two halves;
Fig.11 is a perspective representation of a metal housing adapted to fit over an insert accord-ing to Fig.10;
Fig.12 is a first example of a cylindrical metal plug for a protective device according to the invention;
Fig.13 is a section of the metal plug according to Fig.12;
Fig.14 is a second example of a metal plug;
Fig.15 is a third example of a metal plug;
Fig.16 is another example of a protective cap;
Fig.17 is still another example of a protective cap;
As far as technically practical, similar compon-ents in the drawings bear the same reference numerals.
The drawing shows, in Figs. 1 to 5 and 10, and insert 2 consisting of two halves 4,6 for a metal housing 8 according to Figs. 6 to 9 and 11. Each half of the insert is semi-cylindrical and has a thickened end 10. A thread 12 is formed on the internal surface. A peripheral groove 14 may be formed on the external surface.
Each half has two'stop-surfaces 16,18 and 16',18'.
Only that marked 16,16' is to be seen in Figs. 1 to S.
The stop-surfaces of the one insert-half 4 comprise a groove 20 and the stop-surfaces of the other insert-half comprise a matching tongue 22. One of the stop-surfaces of insert-halves 4 and 6 may also be provided with a groove and the other stop-surface may be provided with a corresponding tongue.
In the vicinity of thickened end 10, the tongue and groove exhibit bends or deflections 24 which are directed radially inwardly.
Insert-halves 4 and 6 according to Figs. 1 and 2 also comprises grooves 26 internally in the vicinity of thickened end 10.
When the two insert-halves are in the assembled condition, groove 26 forms an internal peripheral groove into which a plastic cover 28, for example, may be inserted in order to form a closed protective cap as shown in Fig.3.
12919~4 The cover may also be in the form of a pot 30, as shown in Fig. 5.
Fig.5 shows an example of embodiment in which a lip-seal 30 is inserted into groove 26, the said seal exhib-iting a lip projecting sealingly over the sealing gap 32 between the pipe 34 and insert 2.
The thickened end of each insert-half is provided with a rectangular recess 38, 38'. This may be gathered particularly clearly from Fig.10 which shows insert-halves 4 and 6 in the assembled condition.
Reference should now be made to Figs.6,9 and 11 showing various examples of embodiment of me~tal housing 8.
Fig.6 shows a metal housing, the outer front edge of which is provided with an inwardly rolled edge 40. Cylindrical metal housing 8 comprises, below the said rolled edge, two diamet-rically opposite openings 42, 42' with two tongues 44,46 bent laterally inwarldly, as may be gathered particularly clearly from Figs.7 and 11. When metal housing 8 is fitted to insert 2, cf. Figs.10 and 11, tongues 44 and 46 engage in recesses 38, 38', thus producing a locking effect in the peripheral direction. During fitting and removal of the protective device, a rod-shaped tool may be inserted through openings 42, 42' and recesses 38, 38'.
The lower part of the metal housing carries inwardly directed tongues 48 distributed peripherally. These engage in peripheral groove 14 in insert 2, thus providing axial locking.
In the example of embodiment according to Fig.8, the rolled edge is spiral 50 and the said spiral may be carried far enough to fill the cavity entirely.
Fig.9 shows a rolled edge in the form of an oval 52.
Figs.12 to 16 show a hollow-cylindrical metal plug 54, the outer end of which comprises an outwardly rolled edge 56. The said plug is surrounded by cover-halves which are not shown but are identical with insert-halves 4 and 6 according to Figs.1 to 5. Metal plug 54 has two diametric-ally opposite openings 58 with tongues 60,62 directed laterally outwardly, see Fig.13 also. As in the case of metal housing 8, these tongues engage in corresponding recesses in the cover, not shown.
Figs. 14 and 15 show two further examples of the metal plug. In the case of Fig.14, the rolled edge is in the form of a spiral 64, whereas in the case of Fig.15 it is in the form of an oval 66.
In order also to seal the protective device from pipe 34 at the end remote from the front end and at the beginning of thread 68, insert 2 may comprise at this end, internally, a peripheral groove for an 0-ring 72, as shown in Fig.4 in broken lines for insert-half 6; or it may comprise, at this end 68, internally, a moulded-on, peripheral sealing web 74 converging to an edge, as shown in broken lines in Fig.3 for insert-halves 6.
In a similar manner, the cover in a protective plug may comprise, externally, a groove for an 0-ring or for a moulded-on, peripheral sealing web, not shown in the draw-ing.
Fig.16 shows a cross-section of a protective cap 80 comprising a hollow-cylindrical metal housing 82 with a sleeve-like insert 84 made of an elastomeric material and bearing closely against the metal housing. At its outer end, metal cylinder 82 comPrises an inwardly bent knurled edge 86.
Insert 84 projects into the knurling of knurled edge 86 in such a manner that the inwardly bent part of the knurled edge lZ91954 7466-88 -7~
overlaps the end of the insert and the free edge 88 engages in the insert or bears clampingly against it. Insert 84 comprises internally a peripheral stop 90 for pipe-end 92. A
space 94, in the form of a groove, is left between stop 90 and knurled edge 86 of metal housing 82, in which space a removable resilient cover 96 may be engaged. As in the example according to Fig. 5, stop 90 comprises a peripheral seal 30 which cover sealing gap 32 between the said stop and pipe-end 92.
Fig. 17 shows a cross-section of a protective plug 100 comprising a hollow-cylindrical metal plug 102 with a sleeve-like cover 104 made of an elastomeric material. The end of the hollow-cylindrical metal plug carries an outwardly bent knurled edge 106. Cover 104 projects into the knurling of knurled edge 106 in such a manner that the outwardly bend part of the knurled edge overlaps the end of cover 104 and free knurled edge 107 engages in the cover or bears clamp-ingly against it. Cover 104 exhibits, externally, aperipheral stop 108 for pipe-end 110. The metal plug exhib-its, internally and in the vicinity of knurled edge 106, a peripheral recess or a plurality of spaced recesses 112 in which a removable resilient cover 114, having a peripheral rib or a plurality of spaced projections 114, may be engaged.
Formed onto the annular pipe-stopping surface of stop 108, for the purpose of covering the gap between the stop and the pipe-end, is a peripheral seal 118 in the form of a sealing lip which, when not under load, points obliquely outwardly ~shown broken lines). However, a groove 120 (shown in broken lines) may also be arranged there for the accommodation of an insertable seal.
Claims (19)
1. A protective device for pipe-ends comprising, depending upon its use as a cap or a plug, a metal housing and a sleeve-like insert of elastomeric material, or a metal plug and a sleeve-like cover of elastomeric material, characterized in that the metal housing, or the metal plug, is of tubular design and exhibits, at the outer end, a knurled or folded edge that is rolled in the form of a circle, an oval, or a partial or complete spiral; said insert, bearing closely against the metal housing, or the cover, bearing closely against the metal plug, projects into the knurled edge of the metal housing or of the metal plug, and in that the free knurled edge, which overlaps the end of the insert or of the cover, engages in said insert or cover or bears clampingly against the said insert or cover.
2. A protective device according to claim 1, characterized in that the insert comprises internally, and the cover comprises externally, a peripheral stop for the pipe-end, a space being left between the stop on the insert and the knurled edge on the metal housing, and a removable resilient cover being adapted to be engaged in the said space.
3. A protective device according to claim 1 or 2, characterized in that the metal plug comprises, internally, in the vicinity of the knurled edge, a peripheral recess or a plurality of spaced recesses in which a removable resilient cover, comprising a peripheral rib, or a plurality of spaced projections, is adapted to be engaged.
4. A protective device according to claim 1, characterized in that the insert consists of at least two partly cylindrical casing parts adapted to be joined together.
5. A protective device according to claim 4, characterized in that the axial supporting surfaces of the casing parts are provided with axially arranged tongues and grooves for a tongue-and groove-joint.
6. A protective device according to claim 5, characterized in that the tongues and the grooves exhibit an inwardly directed bend or deflection at the front, thickened end of the insert or of the cover.
7. A protective device according to claim 2, characterized in that the insert comprises, internally and in the end-area, a peripheral groove for the accommodation of a cover or a lip-seal which projects sealingly between the insert and the pipe-end.
8. A protective device according to claim 4, characterized in that the insert comprises, internally and in the end-area, a peripheral groove for the accommodation of a cover or a lip-seal which projects sealingly between the insert and the pipe-end.
9. A protective device according to claim 7, characterized in that the insert, or the insert-parts or the cover or the cover-parts comprises recesses at their ends, and in that the metal housing, or the metal plug, comprises, under the knurled edge, openings, associated with the said recesses, each having tongues directed inwardly or outwardly at right angles, the said tongues engaging in the recesses when the protective device is in the assembled condition.
10. An apparatus according to claim 9, characterized in that the insert or the insert-parts or the cover or the cover-parts comprises, externally or internally, at least one peripheral groove in which outwardly or inwardly directed tongues, on the metal housing or the metal plug, engage.
11. A protective device according to claim 10, characterized in that the insert, or the cover, comprises, at the opposing end, internally or externally, a peripheral groove for the accommodation of an O-ring or a moulded-on, peripheral sealing lip.
12. A protective device according to claim 7, characterized in that the insert comprises, instead of the groove with the lip-seal, a correspondingly designed, moulded on, peripheral lip-seal.
13. A protective device according to claim 2, characterized in that the cover comprises, on the annular pipe-stopping surface of the stop, a peripheral groove for the accommodation of a seal or, on the said pipe-stopping surface, a moulded-on peripheral seal.
14. A protective device according to claim 12, characterized in that the moulded-on peripheral seal is a lip-seal pointing obliquely outwardly.
15. A protective device according to claim 8, characterized in that the insert, or the insert-parts or the cover or the cover-parts comprises recesses at their ends, and in that the metal housing, or the metal plug, comprises, under the knurled edge, openings, associated with the said recesses, each having tongues directed inwardly or outwardly at right angles, the said tongues engaging in the recesses when the protective device is in the assembled condition.
16. An apparatus according to claim 14, characterized in that the insert or the insert-parts or the cover or the cover-parts comprises, externally or internally, at least one peripheral groove in which outwardly or inwardly directed tongues, on the metal housing or the metal plug, engage.
17. A protective device according to claim 15, characterized in that the insert, or the cover, comprises, at the opposing end, internally or externally, a peripheral groove for the accommodation of an O-ring or a moulded-on, peripheral sealing lip.
18. A protective device according to claim 8, characterized in that the insert comprises, instead of the groove with the lip-seal, a correspondingly designed, moulded on, peripheral lip-seal.
19. A protector for the threads of a pipe-end, comprising:
(a) a longitudinally extending metallic tubular member;
(b) an elastomeric sleeve adapted to engage the threads of a pipe-end and affixed co-axially and co-extensively relative to said tubular member, thereby forming a unit;
(c) means for securing said sleeve to said tubular member;
(d) said unit having first and second spaced end portions;
(e) said unit first end portion including an annular groove;
(f) an elastic lid removably secured to said annular groove;
(g) said sleeve is disposed within said tubular member;
(h) said tubular member including a first end portion curved inwardly;
(i) said tubular member including an edge section extending transversely thereto and engaging an end portion of said sleeve, thereby securing said sleeve to said tubular member;
(j) said sleeve including a radially extending annular flange adjacent said tubular member first edge section for engaging an end portion of the pipe-end; and (k) said flange is spaced from said tubular member edge section, thereby forming said annular groove.
(a) a longitudinally extending metallic tubular member;
(b) an elastomeric sleeve adapted to engage the threads of a pipe-end and affixed co-axially and co-extensively relative to said tubular member, thereby forming a unit;
(c) means for securing said sleeve to said tubular member;
(d) said unit having first and second spaced end portions;
(e) said unit first end portion including an annular groove;
(f) an elastic lid removably secured to said annular groove;
(g) said sleeve is disposed within said tubular member;
(h) said tubular member including a first end portion curved inwardly;
(i) said tubular member including an edge section extending transversely thereto and engaging an end portion of said sleeve, thereby securing said sleeve to said tubular member;
(j) said sleeve including a radially extending annular flange adjacent said tubular member first edge section for engaging an end portion of the pipe-end; and (k) said flange is spaced from said tubular member edge section, thereby forming said annular groove.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3721541.8 | 1987-06-30 | ||
| DE19873721541 DE3721541A1 (en) | 1987-06-30 | 1987-06-30 | PROTECTIVE DEVICE FOR PIPE ENDS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1291954C true CA1291954C (en) | 1991-11-12 |
Family
ID=6330578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000570882A Expired - Lifetime CA1291954C (en) | 1987-06-30 | 1988-06-30 | Protective device for pipe ends |
Country Status (9)
| Country | Link |
|---|---|
| EP (2) | EP0519524B1 (en) |
| JP (1) | JP2610652B2 (en) |
| CN (1) | CN1015403B (en) |
| AT (2) | ATE130416T1 (en) |
| BR (1) | BR8803252A (en) |
| CA (1) | CA1291954C (en) |
| DE (3) | DE3721541A1 (en) |
| ES (2) | ES2046240T3 (en) |
| SU (1) | SU1669406A3 (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3392229B2 (en) * | 1993-08-17 | 2003-03-31 | ザ ウィタカー コーポレーション | Crimp terminal assembly |
| US5749756A (en) * | 1995-10-27 | 1998-05-12 | The Whitaker Corporation | Sealed corrosion-proof crimped terminal of splice |
| CH692429A5 (en) * | 1997-05-22 | 2002-06-14 | Nueva Ag | Pipe coupling with connector sleeve and end cap rings having ribbed surface |
| KR100955454B1 (en) | 2002-05-31 | 2010-04-29 | 후지필름 가부시키가이샤 | Positive resist composition |
| UA92374C2 (en) * | 2005-11-15 | 2010-10-25 | Тред Гард Текнолоджи Лтд. | Assembled protector for a pipe end provided with external or internal thread |
| AR051775A1 (en) * | 2005-11-22 | 2007-02-07 | Siderca Sa Ind & Com | A PROTECTIVE ASSEMBLY FOR THE EXTREME THREADED OF A TUBE AND OF ITS INTERIOR THAT INCLUDES AN OPEN THREADED PROTECTOR AND A BLIND COVER ENCASTRABLE TO THE SAME |
| RU2474751C2 (en) * | 2007-08-21 | 2013-02-10 | Сидерка С.А.И.С. | Protective device for pipe end |
| MD3982G2 (en) * | 2008-05-22 | 2010-06-30 | Николай БАРБУЛ | Input and output assembly of the polymeric gas conduit and process for manufacturing thereof |
| DE102009017973A1 (en) * | 2008-12-23 | 2010-07-08 | Rosen Swiss Ag | Covering device for a pipe and pipe with such a covering device |
| NL2003992C2 (en) * | 2009-12-21 | 2011-06-22 | Pipe Proteq B V | Wellbore pipe protection device. |
| CN103482215B (en) * | 2013-09-23 | 2015-11-11 | 河北新兴铸管有限公司 | For the protection of the eversion type protecting sleeve of the ductile iron pipe mouth of pipe |
| DE102014011082A1 (en) * | 2014-07-30 | 2016-02-04 | Airbus Ds Gmbh | Protective device for an elongate hollow body |
| CN105438630A (en) * | 2014-08-24 | 2016-03-30 | 天津市津英达塑料制品有限责任公司 | Check device of outer thread protector |
| CN105366192A (en) * | 2014-08-24 | 2016-03-02 | 天津市津英达塑料制品有限责任公司 | Check device for inner thread protector |
| CN104613276A (en) * | 2015-01-28 | 2015-05-13 | 苏州洛特兰新材料科技有限公司 | Zirconia ceramic open casing pipe |
| CN106402571A (en) * | 2016-10-20 | 2017-02-15 | 陈红玲 | Seal locking support sleeve |
| RU178318U1 (en) * | 2017-06-01 | 2018-03-29 | Акционерное общество "Выксунский металлургический завод" (АО "ВМЗ") | Protective cap for pipes |
| RU184845U1 (en) * | 2018-05-15 | 2018-11-12 | Публичное акционерное общество "Трубная металлургическая компания" (ПАО "ТМК") | Thread guard of the nipple element of the threaded connections of oil and gas field pipes |
| DE102021112801A1 (en) * | 2021-05-18 | 2022-11-24 | Voss Automotive Gmbh | screw connection |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE163744C (en) * | ||||
| US2543960A (en) * | 1947-02-20 | 1951-03-06 | Pittsburgh Screw And Bolt Corp | Thread protector |
| US3000402A (en) * | 1958-02-12 | 1961-09-19 | Phillips Petroleum Co | Thread protector |
| US4020873A (en) * | 1975-07-18 | 1977-05-03 | Precise Metals & Plastics, Inc. | Thread protector for an externally threaded pipe |
| DE2939383A1 (en) * | 1979-09-28 | 1981-04-02 | Dreyfuß GmbH, 3111 Eimke | Protection for housing or pipe interiors - uses stopper made from elastic material pressed into pipe end and with flexible sealing lips |
| FR2499030A2 (en) * | 1981-01-30 | 1982-08-06 | Flimon Jacques | PROTECTIVE DEVICE FOR DRILLING TUBES, ESPECIALLY OIL |
| JPS58174472U (en) * | 1982-05-18 | 1983-11-21 | 日豊工機株式会社 | Tube end screw protector |
| DE3226794A1 (en) * | 1982-07-17 | 1984-01-19 | Gummi-Jäger KG GmbH & Cie, 3000 Hannover | DEVICE FOR PROTECTING THE THREAD ON PIPE ENDS |
| GB8303753D0 (en) * | 1983-02-10 | 1983-03-16 | Ae Plc | Piston and assemblies |
| EP0153315A1 (en) * | 1983-04-26 | 1985-09-04 | Hydril Company | Tubular member thread protector |
| JPS6071793U (en) * | 1983-10-21 | 1985-05-21 | 日鐵建材工業株式会社 | Pipe end screw protector |
| JPS6076660U (en) * | 1983-10-31 | 1985-05-29 | 日鐵建材工業株式会社 | pipe thread protector |
| US4655256A (en) * | 1985-01-14 | 1987-04-07 | Ampco-Pittsburgh Corporation | Threaded end protector and component |
-
1987
- 1987-06-30 DE DE19873721541 patent/DE3721541A1/en active Granted
-
1988
- 1988-06-28 ES ES198888110251T patent/ES2046240T3/en not_active Expired - Lifetime
- 1988-06-28 ES ES92115143T patent/ES2082307T3/en not_active Expired - Lifetime
- 1988-06-28 EP EP92115143A patent/EP0519524B1/en not_active Expired - Lifetime
- 1988-06-28 EP EP88110251A patent/EP0297493B1/en not_active Expired - Lifetime
- 1988-06-28 AT AT92115143T patent/ATE130416T1/en not_active IP Right Cessation
- 1988-06-28 DE DE3854698T patent/DE3854698D1/en not_active Expired - Fee Related
- 1988-06-28 DE DE8888110251T patent/DE3882451D1/en not_active Expired - Fee Related
- 1988-06-28 AT AT88110251T patent/ATE91765T1/en not_active IP Right Cessation
- 1988-06-29 JP JP63159585A patent/JP2610652B2/en not_active Expired - Lifetime
- 1988-06-30 BR BR8803252A patent/BR8803252A/en not_active IP Right Cessation
- 1988-06-30 CN CN88104307A patent/CN1015403B/en not_active Expired
- 1988-06-30 CA CA000570882A patent/CA1291954C/en not_active Expired - Lifetime
- 1988-06-30 SU SU884356102A patent/SU1669406A3/en active
Also Published As
| Publication number | Publication date |
|---|---|
| EP0519524A2 (en) | 1992-12-23 |
| DE3721541C2 (en) | 1993-04-22 |
| CN1030822A (en) | 1989-02-01 |
| DE3721541A1 (en) | 1989-01-12 |
| DE3882451D1 (en) | 1993-08-26 |
| EP0297493A3 (en) | 1989-10-18 |
| EP0297493A2 (en) | 1989-01-04 |
| ES2046240T3 (en) | 1994-02-01 |
| EP0519524B1 (en) | 1995-11-15 |
| JP2610652B2 (en) | 1997-05-14 |
| EP0297493B1 (en) | 1993-07-21 |
| JPS6479498A (en) | 1989-03-24 |
| CN1015403B (en) | 1992-02-05 |
| DE3854698D1 (en) | 1995-12-21 |
| ATE130416T1 (en) | 1995-12-15 |
| EP0519524A3 (en) | 1993-06-09 |
| ATE91765T1 (en) | 1993-08-15 |
| BR8803252A (en) | 1989-01-31 |
| SU1669406A3 (en) | 1991-08-07 |
| ES2082307T3 (en) | 1996-03-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |