CA1067928A - Oval sewerpipe with internal or end surface alignment marks - Google Patents
Oval sewerpipe with internal or end surface alignment marksInfo
- Publication number
- CA1067928A CA1067928A CA278,224A CA278224A CA1067928A CA 1067928 A CA1067928 A CA 1067928A CA 278224 A CA278224 A CA 278224A CA 1067928 A CA1067928 A CA 1067928A
- Authority
- CA
- Canada
- Prior art keywords
- pipe
- edge face
- alignment indicia
- planar edge
- female end
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
- B29D23/003—Pipe joints, e.g. straight joints
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/02—Belling or enlarging, e.g. combined with forming a groove
- B29C57/08—Belling or enlarging, e.g. combined with forming a groove using pressure difference
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- 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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
-
- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Joints With Sleeves (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Sewage (AREA)
- Supports For Pipes And Cables (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The expanded, female end of an elliptical drain or sewerpipe is provided with an installation alignment mark on the inner edge surface or on the end face of the pipe to designate at least one major cross-sectional axis point or intersection.
The pipe is installed with such internal alignment mark on the bottom side of the pipe in a ground trench whereby the mark is not burried in or hidden by the trench bottom earth, and is cooperable with a second internal or external alignment mark on the opposite side of the pipe end to facilitate the accurate vertical orientation of the major axis with the aid of a plumb line or the like.
The expanded, female end of an elliptical drain or sewerpipe is provided with an installation alignment mark on the inner edge surface or on the end face of the pipe to designate at least one major cross-sectional axis point or intersection.
The pipe is installed with such internal alignment mark on the bottom side of the pipe in a ground trench whereby the mark is not burried in or hidden by the trench bottom earth, and is cooperable with a second internal or external alignment mark on the opposite side of the pipe end to facilitate the accurate vertical orientation of the major axis with the aid of a plumb line or the like.
Description
- -1~6'79~
1 BACKGROUND OF THE_INVENTION
This invention relates to a major axis alignment indicator for an oval sewerpipe.
Synthetic resin pipes having generally elliptical cross sections, oval or egg-shaped for example, are being increasingly used as drainpipes or sewerpipes in place of con-ventional circular pipes, as waste materials may flow therethrough at considerably high speeds to prevent clogging accumulations.
Elliptical pipes of this type are much more difficult to install than conventional circular pipes, however, since according to hydrographic principles they must be laid with their.
major cross-sectional axes vertically oriented in order to promote optimum flow conditiGns. Such accurate vertical align-ment or orientation is difficult to accomplish wLth the naked :.
eye, and it is thus necessary to employ plumb lines, level rods, .:
or the like during installation.
In the prior art an alignment mark has been placed on ~: -the outer surface of an end.portion of an elliptical pipe to designate the major cross-sectional axis of the pipe, and such mark is used as a vertical plumb guide when laying the pipe.
When the pipe is laid in the typical ground trench, however, the mark on the bottom edge of the pipe sinks into and is ..
obscured by the trench bottom earth and cannot be seen, whereby accurate vertical axis alignment is very difficult. ~A~ ,.,.'''., ,' SUMMARY OF THE INVENTION
The drawbacks and disadvantages of the prior art are e~fectively overcome b~ the present invention, according to which the female end of an elliptical drain or sewerpipe is 30 provided with an installation alignment mark on the inner edge surface or on the end face of the pipe to designate at least one ;r' ~
1C~67~213 1 major Crss-sectional a~is point or intersection. The pipe is installed with such internal alignment mark on the bottom side of the pipe in a ground trench whereby the mark is not buried in or hidden by the trench bottom earth, and is cooperable with a second internal or external alignment mark on the opposite side of the pipe end to fac~tate the accurate vertical orientation of the major axis with the aid of a plumb line or the like.
BRIEF DESCRIPTION OF THE DRAWINGS
9~ In the drawings:
Fig. 1 shows a longitudinal cross-sectional view of an elliptical drainpipe or sewerpipe according to the present invention, Fig. 2 shows a cross-sectional end view taken along line II-II in Fig. 1, and Fig. 3 shows a longitudinal cross-sectional view illustrating a method of producing ths pipe end shown in Fig. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to th~ drawings, reference numeral 1 designates a drainpipe or sewerpipe having an egg-shaped cross-..
section and fabricated from a rigid synthetic resin, such aspolyvinyl chloride. The end portion of the pipe 1 has an increased diameter to form a female opening 2 ~or receiving an inserted, matingly configured male pipe end, and the inner surface of the female opening is provided with an annular recess 21 to accommodate a packing gland or ringO Recesses 3, 4 are provided on the inner surface of the end portion of the opening 2 at the opposite ends of the major axis of tha pipe, and serve as align-ment marks during installation. The pipe is laid with its more 30sharply angled side, correspondiny to recess 4, on the bottom in -- 2 -- : : :
:
- , , ~C~6'7~
1 order to achieve op timum f low conditions. The upper recess 3 is therefore not strictly required for alignment purposes, but rather an outer projection 31 which is inherently produced when forming the recess 3 is used in conjunction with the lower recess 4 to achieve accurate orientation. That is, the pipe 1 is placed in a trench, a plum'b line or the like i5 SUS-pended adjacent the female opening 2, and the pipe is then rolled until a line joining the projection 31 and recess 4 is aligned with or parallel to the vertical plumb line. Alter-10 natively of course, a conventional construction or carpenters level can be used. ~' The recesses 3, 4 can be replaced by marks or grooves molded or scored into the planar end face of the pipe edge, or -on the inner and outer surfaces'thereof, with e~ual facility.
The essential criterion is that the alignment marksj whatever their specific form, be visible to the installing workmen and -not obscured, hidden, or buried when the pipe is in situ.
Referring now to Fig. 3, a core piece or plug 5, 1!. ".,.' ., , whose outer shape corresponds to ~he desired inner configuration 20 of the female openLng 2, is provlded with short proje~tions 51 positioned at the two intersections of the major'cross-sectional axis of the pipe with its end face. A passage 52 therein serves for'~the introduction of a pressurized ~luid.
The end portion of the synthetic reæin pipe is heat softened and force fitted over the core, whereby it expands to ~orm the female opening 2 and the recesses 3, 4 defined by the two projections 51. Split molds 6 are then mounted over the pipe ~end so that their annularly recessed middle portions are aligned with the annular ring communicating with the passage 52. When ~30 a pressurized fluid is applied to the passage 52 the adjacent pipe _ 3 _ :106792~3 1 circumference expands to form the packing recess 21. Reference numerals 7 designate 0-ring seals. After the pipe has been cooled the split molds 6 and then the core plug 5 are removed, to thus complete the molding of the female end configuration shown in Fig. 1.
When an asymmetrical egg-shaped pipe configuration as shown in the drawings, or with a symmetrical oval or elliptical shaped pipe, the insertion alignment of the male pipe end is automatic and inherent since it will only fit when properly tO vertically oriented.
~ ;
: ~ ' :~ 30 4- :
~::
, -, ~ ~ '
1 BACKGROUND OF THE_INVENTION
This invention relates to a major axis alignment indicator for an oval sewerpipe.
Synthetic resin pipes having generally elliptical cross sections, oval or egg-shaped for example, are being increasingly used as drainpipes or sewerpipes in place of con-ventional circular pipes, as waste materials may flow therethrough at considerably high speeds to prevent clogging accumulations.
Elliptical pipes of this type are much more difficult to install than conventional circular pipes, however, since according to hydrographic principles they must be laid with their.
major cross-sectional axes vertically oriented in order to promote optimum flow conditiGns. Such accurate vertical align-ment or orientation is difficult to accomplish wLth the naked :.
eye, and it is thus necessary to employ plumb lines, level rods, .:
or the like during installation.
In the prior art an alignment mark has been placed on ~: -the outer surface of an end.portion of an elliptical pipe to designate the major cross-sectional axis of the pipe, and such mark is used as a vertical plumb guide when laying the pipe.
When the pipe is laid in the typical ground trench, however, the mark on the bottom edge of the pipe sinks into and is ..
obscured by the trench bottom earth and cannot be seen, whereby accurate vertical axis alignment is very difficult. ~A~ ,.,.'''., ,' SUMMARY OF THE INVENTION
The drawbacks and disadvantages of the prior art are e~fectively overcome b~ the present invention, according to which the female end of an elliptical drain or sewerpipe is 30 provided with an installation alignment mark on the inner edge surface or on the end face of the pipe to designate at least one ;r' ~
1C~67~213 1 major Crss-sectional a~is point or intersection. The pipe is installed with such internal alignment mark on the bottom side of the pipe in a ground trench whereby the mark is not buried in or hidden by the trench bottom earth, and is cooperable with a second internal or external alignment mark on the opposite side of the pipe end to fac~tate the accurate vertical orientation of the major axis with the aid of a plumb line or the like.
BRIEF DESCRIPTION OF THE DRAWINGS
9~ In the drawings:
Fig. 1 shows a longitudinal cross-sectional view of an elliptical drainpipe or sewerpipe according to the present invention, Fig. 2 shows a cross-sectional end view taken along line II-II in Fig. 1, and Fig. 3 shows a longitudinal cross-sectional view illustrating a method of producing ths pipe end shown in Fig. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to th~ drawings, reference numeral 1 designates a drainpipe or sewerpipe having an egg-shaped cross-..
section and fabricated from a rigid synthetic resin, such aspolyvinyl chloride. The end portion of the pipe 1 has an increased diameter to form a female opening 2 ~or receiving an inserted, matingly configured male pipe end, and the inner surface of the female opening is provided with an annular recess 21 to accommodate a packing gland or ringO Recesses 3, 4 are provided on the inner surface of the end portion of the opening 2 at the opposite ends of the major axis of tha pipe, and serve as align-ment marks during installation. The pipe is laid with its more 30sharply angled side, correspondiny to recess 4, on the bottom in -- 2 -- : : :
:
- , , ~C~6'7~
1 order to achieve op timum f low conditions. The upper recess 3 is therefore not strictly required for alignment purposes, but rather an outer projection 31 which is inherently produced when forming the recess 3 is used in conjunction with the lower recess 4 to achieve accurate orientation. That is, the pipe 1 is placed in a trench, a plum'b line or the like i5 SUS-pended adjacent the female opening 2, and the pipe is then rolled until a line joining the projection 31 and recess 4 is aligned with or parallel to the vertical plumb line. Alter-10 natively of course, a conventional construction or carpenters level can be used. ~' The recesses 3, 4 can be replaced by marks or grooves molded or scored into the planar end face of the pipe edge, or -on the inner and outer surfaces'thereof, with e~ual facility.
The essential criterion is that the alignment marksj whatever their specific form, be visible to the installing workmen and -not obscured, hidden, or buried when the pipe is in situ.
Referring now to Fig. 3, a core piece or plug 5, 1!. ".,.' ., , whose outer shape corresponds to ~he desired inner configuration 20 of the female openLng 2, is provlded with short proje~tions 51 positioned at the two intersections of the major'cross-sectional axis of the pipe with its end face. A passage 52 therein serves for'~the introduction of a pressurized ~luid.
The end portion of the synthetic reæin pipe is heat softened and force fitted over the core, whereby it expands to ~orm the female opening 2 and the recesses 3, 4 defined by the two projections 51. Split molds 6 are then mounted over the pipe ~end so that their annularly recessed middle portions are aligned with the annular ring communicating with the passage 52. When ~30 a pressurized fluid is applied to the passage 52 the adjacent pipe _ 3 _ :106792~3 1 circumference expands to form the packing recess 21. Reference numerals 7 designate 0-ring seals. After the pipe has been cooled the split molds 6 and then the core plug 5 are removed, to thus complete the molding of the female end configuration shown in Fig. 1.
When an asymmetrical egg-shaped pipe configuration as shown in the drawings, or with a symmetrical oval or elliptical shaped pipe, the insertion alignment of the male pipe end is automatic and inherent since it will only fit when properly tO vertically oriented.
~ ;
: ~ ' :~ 30 4- :
~::
, -, ~ ~ '
Claims (9)
1. In an elongated pipe having an oval cross-section and adapted to be installed in a ground trench such that its major cross-sectional axis is vertically oriented, said pipe having a female end portion adapted to receive a male end of a successive pipe, and the female end of said pipe having installation alignment indicia disposed proximate to and designating the opposite intersections between the major cross-sectional axis of the pipe and said female end portion, the improvement characterized by:
at least one of said alignment indicia being on the interior surface of said pipe adjacent the planar edge face of said female end portion or on said planar edge face, whereby said one alignment indicia remains visible when said pipe is laid in a ground trench with said one alignment indicia on the bottom or lower side thereof.
at least one of said alignment indicia being on the interior surface of said pipe adjacent the planar edge face of said female end portion or on said planar edge face, whereby said one alignment indicia remains visible when said pipe is laid in a ground trench with said one alignment indicia on the bottom or lower side thereof.
2. A pipe as defined in claim 1, wherein there are two alignment indicia, each being on the interior surface of said pipe adjacent the planar edge face of said female end portion or on said planar edge face.
3. A pipe as defined in claim 2, wherein said alignemnt indicia comprise recesses on the interior surfaces of said pipe and corresponding projections on the exterior surfaces thereof.
4. A pipe as defined in claim 2, wherein said alignment indicia each comprises an indentation in said planar edge face.
5. A pipe as defined in claim 4, wherein said indentations comprise elongated grooves coincident with said major axis.
6. A pipe as defined in claim 2, wherein said alignemnt indicia each comprises a projection on said planar edge face.
7. A pipe as defined in claim 6, wherein said projections comprise elongated ridges coincident with said major axis.
8. A pipe as defined in claim 1, wherein said pipe is egg-shaped, and said one alignment indicia is disposed at the more sharply angled end of said major axis.
9. A pipe as defined in claim 1, 2 or 3 wherein said pipe is made of a hard synthetic resin.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1976063712U JPS571189Y2 (en) | 1976-05-18 | 1976-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1067928A true CA1067928A (en) | 1979-12-11 |
Family
ID=13237256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA278,224A Expired CA1067928A (en) | 1976-05-18 | 1977-05-12 | Oval sewerpipe with internal or end surface alignment marks |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS571189Y2 (en) |
| AU (1) | AU502592B2 (en) |
| CA (1) | CA1067928A (en) |
| DE (1) | DE2722300A1 (en) |
| ES (1) | ES229042Y (en) |
| FR (1) | FR2352117A1 (en) |
| GB (1) | GB1548097A (en) |
| IT (1) | IT1084298B (en) |
| NL (1) | NL7705440A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4955411A (en) * | 1981-09-04 | 1990-09-11 | The Goodyear Tire & Rubber Company | Hose having index mark |
| FR2758381B1 (en) * | 1997-01-28 | 1999-02-26 | Alphacan Sa | BI-ORIENTED PLASTIC TUBE |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48105911U (en) * | 1972-03-09 | 1973-12-08 |
-
1976
- 1976-05-18 JP JP1976063712U patent/JPS571189Y2/ja not_active Expired
-
1977
- 1977-05-12 GB GB1989977A patent/GB1548097A/en not_active Expired
- 1977-05-12 CA CA278,224A patent/CA1067928A/en not_active Expired
- 1977-05-16 IT IT4941277A patent/IT1084298B/en active
- 1977-05-17 DE DE19772722300 patent/DE2722300A1/en active Pending
- 1977-05-17 FR FR7715113A patent/FR2352117A1/en active Granted
- 1977-05-17 AU AU25204/77A patent/AU502592B2/en not_active Expired
- 1977-05-17 NL NL7705440A patent/NL7705440A/en active Search and Examination
- 1977-05-18 ES ES1977229042U patent/ES229042Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1548097A (en) | 1979-07-04 |
| FR2352117B1 (en) | 1979-03-30 |
| AU2520477A (en) | 1978-11-23 |
| JPS571189Y2 (en) | 1982-01-08 |
| NL7705440A (en) | 1977-11-22 |
| JPS52153925U (en) | 1977-11-22 |
| AU502592B2 (en) | 1979-08-02 |
| FR2352117A1 (en) | 1977-12-16 |
| IT1084298B (en) | 1985-05-25 |
| ES229042U (en) | 1977-11-01 |
| ES229042Y (en) | 1978-03-01 |
| DE2722300A1 (en) | 1977-11-24 |
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