CA1229329A - Shaping element for manhole opening and gasket - Google Patents
Shaping element for manhole opening and gasketInfo
- Publication number
- CA1229329A CA1229329A CA000504912A CA504912A CA1229329A CA 1229329 A CA1229329 A CA 1229329A CA 000504912 A CA000504912 A CA 000504912A CA 504912 A CA504912 A CA 504912A CA 1229329 A CA1229329 A CA 1229329A
- Authority
- CA
- Canada
- Prior art keywords
- shaping element
- flange
- mating
- wall
- mating parts
- 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
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/0056—Means for inserting the elements into the mould or supporting them in the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/0043—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects with gaskets or sealing elements, e.g. for tunnelings or man holes
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/0401—Gullies for use in roads or pavements
Abstract
ABSTRACT OF THE DISCLOSURE
This shaping element is designed to form a sewer pipe receiving opening during pouring of concrete to mound a manhole.
The shaping element also holds a gasket seal in position until the concrete has set. The shaping element is made of two axially separable parts each having a flange to form part of the sewer pipe receiving opening. The inner end of one flange has an L-shaped extension defining a radially-inwardly-extending step and an axially-extending end portion, the inner end of the other part extends short of the step and overlaps the axial extension whereby there is formed a gasket seal receiving peripheral channel of L-shaped cross-section. The two parts are completely closed at their outer ends and are assembled by means of non-circular telescopic tubes at their center to maintain the same in a predetermined relative orientation.
This shaping element is designed to form a sewer pipe receiving opening during pouring of concrete to mound a manhole.
The shaping element also holds a gasket seal in position until the concrete has set. The shaping element is made of two axially separable parts each having a flange to form part of the sewer pipe receiving opening. The inner end of one flange has an L-shaped extension defining a radially-inwardly-extending step and an axially-extending end portion, the inner end of the other part extends short of the step and overlaps the axial extension whereby there is formed a gasket seal receiving peripheral channel of L-shaped cross-section. The two parts are completely closed at their outer ends and are assembled by means of non-circular telescopic tubes at their center to maintain the same in a predetermined relative orientation.
Description
~L;229~;29 FIELD OLD live I~IV~rIIION
This invention relates to a slipping element for the formation of a sewer pipe receiving opening ~urlng pouring of wettable material to form a manhole ail also to hold the scaling gasket in position within said Sue pipe receiving opining, BACKGROUND OF To lNVEN'r.ION
In the present invent '5 US, patent 4,598,918 issued July 8, 198S for a GASKET SAL BETWEEN SEWER PIPE AND
MANUEL. OPENING, and corresponding Canadian patent # 1,207,815 issued July 15, 1986 , there is described a new scaling gasket to effect a very good seal butter a sewer pipe and a manhole openirIg.
OBJECTS OF TIE INVENTION
The main object of Eli present invention is the provision of a shaping element specifically designed to install the above-noted sealing gasket in tire Muriel oF?nln~ and to form said opening during pouring of wettable material to form the molehill Anther object of tile involution is to provide a shaping elernerIt of the character discord which is of simple and inexpeIlsive construction which is made of two parts made in such a way as to prevent ingress into the shaping element of the wettable material and which is provided with simple gulping and securing means which maintain the two parts of the shaping elements in their proper relative orir?Iltation.
, ho Jo ~`~
SUl~MAR~ OF TOE INVENTION
The shaping element defines the inner surface of revolution of an opening through a wall of wettable material as it is being formed between an exterior and an interior wall form.
The shaping element comprises exterior and interior mating parts, securing means to secure said mating parts in assembled position and which allows their axial separation, each part having an inwardly-extending flange to mound a corresponding portion of the wall opening. The flange of the outer part is substantially straight in cross-section, the flange of the inner part has at its inner end an extension of L-shaped cross-section, one leg defining a radially-inwardly-extending step and the other free leg extending parallel to the long axis of the shaping element.
The flange of the outer part extends short of the step whereby there is formed at the inner ends of the two flanges a peripheral channel to receive and retain the radially-inward cross-sectionally angled scaling lip of the annular sealing gasket in accordance with the above-noted US. patent # 9,598,918 and corresponding Canadian patent # l,207,815 issued July 15, 1986 .
Preferably, outer walls completely close the outer ends of the sealing element to prevent ingress of wettable material within the assembled shaping element. Preferably, these outer walls radially-outwardly protrude from the respective flanges...
These outer walls conform in shape and abut against the respective wall forms.
Preferably, guiding means in the form of axial telescopic non-circular tubular elements fixed to the center of ~l~293z~
the respective outer walls are provided for the ease in the axial assembly of the two parts and their axial separation. Slot and tab means are also preferably provided so as to permit assembly of the two parts for one relative orientation of the two parts.
The securing means are simply a tie bolt extending through the tubular telescopic elements and through the wall forms.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an exploded, perspective view of the various components of the shaping element of the seal gasket to be installed on the same and of the two wall forms between which the shaping elements are installed;
Figure 2 is a partial cross-section of a manhole with the shaping element and sealing gasket in position;
Figure 3 is a cross-section taken along line 3-3 of figure 2;
and figure 4 is a cross-section of the manhole wall with the gasket installed therein, the shaping element having been removed.
DETAILED DESCRIPTION OF THE INVENTION
The shaping or mounding element is generally indicated at 1 and! it designed to be inserted in position between an inner wall form 2 and an outer wall form 3 to mound the inner surface B
of a side opening made in manhole C for receiving a sewer pipe (not shown). The shaping element is also designed to hold in position the gasket seal A during pouring of the concrete to form , :, ~2;~29 the manhole wall C between the wall forms 2 and 3, Since a manhole is normally cylindrical, the two wall forms 2 and 3 are cylindrical and co-axial. The shaping element 1 is made of an inner shaping part 4 and an outer shaping part 5 which are assembled by axial movement toward each other and disassembled by axial separation after the concrete or other wettable material has set and after the wall forms 2 and 3 have been stripped away.
Inner shaping part 4 has an outer wall 6 while outer shaping part has an outer wall 7. Each outer wall 6 and 7 has a shape to conform with and abut against the respective inner and outer wall forms 2 and 3. More specifically, each outer wall 6, 7, is curved in cross-section along a horizontal diameter to conform with the horizontal curvature of the wall worms 2 and 3 and are cross-sectionally straight in the vertical direction, i.e. along a diameter normal to the first-named diameter. The inner shaping par has a flange 8 which is secured to the outer wall 6 near the periphery of the latter and which extends inwardly. This flange 8 serves as a mounding surface to mound a portion of the inner surface B of the manhole side opening.
Similarly, the outer shaping part 5 has a flange 9 which extends inwardly from the peripheral zone of outer wall 7 and serves to shape the remaining part of the manhole opening.
Flange 9 is substantially straight in cross-section and has an inner end 10. Flange 8 is formed at its inner end 11 with an extension of generally L-shaped cross-section defining as a first leg a radially-inwardly-extending step 12 and as a second leg a 12;~:~3329 generally cylindrical portion 13 which, when the two shaping parts 9 and 5 are assembled or mated, laps the inner end portion 10 of flange 9 and is radially and inwardly spaced from the same.
When the two shaping parts 4 and S are assembled, there is thus formed between step 12 and inner end 10 a peripheral channel 14 which opens radially outwardly and which it of L-shaped cross-section, so as to be adapted to receive and retain between the two mating parts the gasket seal A in accordance with the teachings of the above-noted US. patent 4,598,918 and corresponding Canadian patent 1,207,815 issued July 15, 1986 .
As described in this US. patent # 4,598,918 and corresponding Canadian patent # 1,207,815 issued July 15, 1986 , the gasket seal A is made of elastomeric material as a continuous awns and includes in unstressed state a radially-outer cylindrical flange mcmber 15 from the mid-plane of which extends a radial web 16 from the radially-inner end of which, in turn, extends a pear-shaped enlargement 17 which tapers radially-inwardly and which is extended by a cross-sectionally angled sealing lip 18. As shown in Figure 2, the angled portion of the sealing lip 18 engages into the L-shaped channel 14 and this lip is squeezed between the step 12 and the inner end 10 of the flange 9 so that the enlargement 17 and web 16 are maintained in a generally radially-outwardly-directed position so that part of the enlargement 17 and the whole of the web 16 and flange 15 will be embedded into the wettable material 20, Preferably, the outer walls 6 and 7 protrude radially-~Z293Z~3 outwardly from the respective flanges 8 and 9 to form annular flanges 21, 21' , which provide a still better seal between the wall forms 2 and 3 and the shaping element 1. These annular flanges 21, 21' together with the outer walls and 7, completely prevent ingress of the wettable material 20 within the assembled shaping element 1 during pouring of the wettable material. The outer walls 6 and 7 serve also as a support for the means for guiding and securing the two shaping parts 4 and 5 together.
These means include the following elements: to the center of the outer wall 6 of inner shaping part 4 is rigidly secured a tubular section 22 of non-circular cross-section preferably of square cross-section) and which extends axially of the shaping element 1 being completely opened at its inner end 23. Similarly, a tubular section 24 is secured to the center of the outer wall 7 of outer shaping element 5 and extends axially of the shaping element 1 to telescopically engage within the tubular section 22.
The shaping parts 4 and S may be made in one piece of glass-fibres reinforced synthetic resin and the tubular sections 22, 24, are made of steel and attached to the outer walls 6 and 7 by means of short metal rods 25 welded to the tubular sections 22, 24, and embedded within the synthetic resin of the outer walls. Obviously, shaping parts 4 and S could be made of any other suitable material.
The tubular section 22 which is the outer element of the two telescopic elements is provided with a longitudinally-extending slot 26 at one corner thereof and which opens at the ~2~33Z9 inner end 23. The other tubular section 24 carries at its inner end an outwardly-pro~ecting tab 27 which engages the slot 26 upon assembly of the two shaping parts 4 and 5 only when these two shaping parts are properly oriented one with respect to the other; otherwise, the tab 27 cannot engage the slot 26 and the two shaping parts cannot be properly assembled. Once assembled with the gasket seal A properly retained on the shaping element 1, the assembly of the shaping element 1 of the gasket A are properly located between the wall forms 2 and 3 and are secured in position and tightened one against the other my a tie-bolt 28 with a nut I the tie-bolt extending through holes maze in the wall forms 2 and 3 and through the tubular sections 22, 2q.
When the material 20 has sufficiently set, the wall forms 2 and 3 can be stripped away after removal of the tie-bolt 28. The two shaping parts 9 and 5 can then be disassembled by axial separation outwardly and inwardly of the manhole. The gasket seal therefore remains in anchored position within the concrete surrounding the sewer pipe receiving opening.
Inner end 10 is radially-inwardly offset from inner end 11 to form a sewer pipe abutment in concrete C when the sewer pipe is excessively loaded. Yet, lip I can flex in the direction of arrow D during and after pipe insertion The pipe abutment prevents damage to the gasket seal A.
This invention relates to a slipping element for the formation of a sewer pipe receiving opening ~urlng pouring of wettable material to form a manhole ail also to hold the scaling gasket in position within said Sue pipe receiving opining, BACKGROUND OF To lNVEN'r.ION
In the present invent '5 US, patent 4,598,918 issued July 8, 198S for a GASKET SAL BETWEEN SEWER PIPE AND
MANUEL. OPENING, and corresponding Canadian patent # 1,207,815 issued July 15, 1986 , there is described a new scaling gasket to effect a very good seal butter a sewer pipe and a manhole openirIg.
OBJECTS OF TIE INVENTION
The main object of Eli present invention is the provision of a shaping element specifically designed to install the above-noted sealing gasket in tire Muriel oF?nln~ and to form said opening during pouring of wettable material to form the molehill Anther object of tile involution is to provide a shaping elernerIt of the character discord which is of simple and inexpeIlsive construction which is made of two parts made in such a way as to prevent ingress into the shaping element of the wettable material and which is provided with simple gulping and securing means which maintain the two parts of the shaping elements in their proper relative orir?Iltation.
, ho Jo ~`~
SUl~MAR~ OF TOE INVENTION
The shaping element defines the inner surface of revolution of an opening through a wall of wettable material as it is being formed between an exterior and an interior wall form.
The shaping element comprises exterior and interior mating parts, securing means to secure said mating parts in assembled position and which allows their axial separation, each part having an inwardly-extending flange to mound a corresponding portion of the wall opening. The flange of the outer part is substantially straight in cross-section, the flange of the inner part has at its inner end an extension of L-shaped cross-section, one leg defining a radially-inwardly-extending step and the other free leg extending parallel to the long axis of the shaping element.
The flange of the outer part extends short of the step whereby there is formed at the inner ends of the two flanges a peripheral channel to receive and retain the radially-inward cross-sectionally angled scaling lip of the annular sealing gasket in accordance with the above-noted US. patent # 9,598,918 and corresponding Canadian patent # l,207,815 issued July 15, 1986 .
Preferably, outer walls completely close the outer ends of the sealing element to prevent ingress of wettable material within the assembled shaping element. Preferably, these outer walls radially-outwardly protrude from the respective flanges...
These outer walls conform in shape and abut against the respective wall forms.
Preferably, guiding means in the form of axial telescopic non-circular tubular elements fixed to the center of ~l~293z~
the respective outer walls are provided for the ease in the axial assembly of the two parts and their axial separation. Slot and tab means are also preferably provided so as to permit assembly of the two parts for one relative orientation of the two parts.
The securing means are simply a tie bolt extending through the tubular telescopic elements and through the wall forms.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an exploded, perspective view of the various components of the shaping element of the seal gasket to be installed on the same and of the two wall forms between which the shaping elements are installed;
Figure 2 is a partial cross-section of a manhole with the shaping element and sealing gasket in position;
Figure 3 is a cross-section taken along line 3-3 of figure 2;
and figure 4 is a cross-section of the manhole wall with the gasket installed therein, the shaping element having been removed.
DETAILED DESCRIPTION OF THE INVENTION
The shaping or mounding element is generally indicated at 1 and! it designed to be inserted in position between an inner wall form 2 and an outer wall form 3 to mound the inner surface B
of a side opening made in manhole C for receiving a sewer pipe (not shown). The shaping element is also designed to hold in position the gasket seal A during pouring of the concrete to form , :, ~2;~29 the manhole wall C between the wall forms 2 and 3, Since a manhole is normally cylindrical, the two wall forms 2 and 3 are cylindrical and co-axial. The shaping element 1 is made of an inner shaping part 4 and an outer shaping part 5 which are assembled by axial movement toward each other and disassembled by axial separation after the concrete or other wettable material has set and after the wall forms 2 and 3 have been stripped away.
Inner shaping part 4 has an outer wall 6 while outer shaping part has an outer wall 7. Each outer wall 6 and 7 has a shape to conform with and abut against the respective inner and outer wall forms 2 and 3. More specifically, each outer wall 6, 7, is curved in cross-section along a horizontal diameter to conform with the horizontal curvature of the wall worms 2 and 3 and are cross-sectionally straight in the vertical direction, i.e. along a diameter normal to the first-named diameter. The inner shaping par has a flange 8 which is secured to the outer wall 6 near the periphery of the latter and which extends inwardly. This flange 8 serves as a mounding surface to mound a portion of the inner surface B of the manhole side opening.
Similarly, the outer shaping part 5 has a flange 9 which extends inwardly from the peripheral zone of outer wall 7 and serves to shape the remaining part of the manhole opening.
Flange 9 is substantially straight in cross-section and has an inner end 10. Flange 8 is formed at its inner end 11 with an extension of generally L-shaped cross-section defining as a first leg a radially-inwardly-extending step 12 and as a second leg a 12;~:~3329 generally cylindrical portion 13 which, when the two shaping parts 9 and 5 are assembled or mated, laps the inner end portion 10 of flange 9 and is radially and inwardly spaced from the same.
When the two shaping parts 4 and S are assembled, there is thus formed between step 12 and inner end 10 a peripheral channel 14 which opens radially outwardly and which it of L-shaped cross-section, so as to be adapted to receive and retain between the two mating parts the gasket seal A in accordance with the teachings of the above-noted US. patent 4,598,918 and corresponding Canadian patent 1,207,815 issued July 15, 1986 .
As described in this US. patent # 4,598,918 and corresponding Canadian patent # 1,207,815 issued July 15, 1986 , the gasket seal A is made of elastomeric material as a continuous awns and includes in unstressed state a radially-outer cylindrical flange mcmber 15 from the mid-plane of which extends a radial web 16 from the radially-inner end of which, in turn, extends a pear-shaped enlargement 17 which tapers radially-inwardly and which is extended by a cross-sectionally angled sealing lip 18. As shown in Figure 2, the angled portion of the sealing lip 18 engages into the L-shaped channel 14 and this lip is squeezed between the step 12 and the inner end 10 of the flange 9 so that the enlargement 17 and web 16 are maintained in a generally radially-outwardly-directed position so that part of the enlargement 17 and the whole of the web 16 and flange 15 will be embedded into the wettable material 20, Preferably, the outer walls 6 and 7 protrude radially-~Z293Z~3 outwardly from the respective flanges 8 and 9 to form annular flanges 21, 21' , which provide a still better seal between the wall forms 2 and 3 and the shaping element 1. These annular flanges 21, 21' together with the outer walls and 7, completely prevent ingress of the wettable material 20 within the assembled shaping element 1 during pouring of the wettable material. The outer walls 6 and 7 serve also as a support for the means for guiding and securing the two shaping parts 4 and 5 together.
These means include the following elements: to the center of the outer wall 6 of inner shaping part 4 is rigidly secured a tubular section 22 of non-circular cross-section preferably of square cross-section) and which extends axially of the shaping element 1 being completely opened at its inner end 23. Similarly, a tubular section 24 is secured to the center of the outer wall 7 of outer shaping element 5 and extends axially of the shaping element 1 to telescopically engage within the tubular section 22.
The shaping parts 4 and S may be made in one piece of glass-fibres reinforced synthetic resin and the tubular sections 22, 24, are made of steel and attached to the outer walls 6 and 7 by means of short metal rods 25 welded to the tubular sections 22, 24, and embedded within the synthetic resin of the outer walls. Obviously, shaping parts 4 and S could be made of any other suitable material.
The tubular section 22 which is the outer element of the two telescopic elements is provided with a longitudinally-extending slot 26 at one corner thereof and which opens at the ~2~33Z9 inner end 23. The other tubular section 24 carries at its inner end an outwardly-pro~ecting tab 27 which engages the slot 26 upon assembly of the two shaping parts 4 and 5 only when these two shaping parts are properly oriented one with respect to the other; otherwise, the tab 27 cannot engage the slot 26 and the two shaping parts cannot be properly assembled. Once assembled with the gasket seal A properly retained on the shaping element 1, the assembly of the shaping element 1 of the gasket A are properly located between the wall forms 2 and 3 and are secured in position and tightened one against the other my a tie-bolt 28 with a nut I the tie-bolt extending through holes maze in the wall forms 2 and 3 and through the tubular sections 22, 2q.
When the material 20 has sufficiently set, the wall forms 2 and 3 can be stripped away after removal of the tie-bolt 28. The two shaping parts 9 and 5 can then be disassembled by axial separation outwardly and inwardly of the manhole. The gasket seal therefore remains in anchored position within the concrete surrounding the sewer pipe receiving opening.
Inner end 10 is radially-inwardly offset from inner end 11 to form a sewer pipe abutment in concrete C when the sewer pipe is excessively loaded. Yet, lip I can flex in the direction of arrow D during and after pipe insertion The pipe abutment prevents damage to the gasket seal A.
Claims (15)
1. A shaping element to define the inner surface of revolution of an opening through a wall of settable material as it is being formed between an exterior and an interior wall form, said shaping element comprising: exterior and interior mating parts, securing means to secure said mating parts in assembled position, said mating parts, when in assembled position, providing a peripheral wall configured to produce said inner surface of revolution of a desired size and shape, each of said parts having a longitudinal axis which is co-axial with said opening when the mating parts are assembled and each said mating part having a peripheral flange with an outer end and an inner end, said outer end adapted to abut against the respective wall forms, each flange extending inwardly from its outer end and each defining a portion of said peripheral wall, the inner end of the flange of said exterior mating part being radially-inwardly-offset relative to the inner end of the flange of said interior mating part, the inner ends of said flanges being axially-spaced in the assembled position of said mating parts and providing a peripheral channel to receive and retain the radially-inward lip portion of an annular sealing gasket which has a radially-outward anchoring portion adapted to radially protrude from said peripheral wall to be anchored in said settable material.
2. A shaping element as defined in claim 1, wherein said interior and exterior wall forms are cylindrical and co-axial, said shaping element further including an outer closure wall for each said mating part secured to the outer end of the respective flanges and extending in a plane generally normal to said longitudinal axis said closure walls having a curvature in one diametrical direction and being straight in a second diametrical direction normal to said one diametrical direction, the curvature of the respective closure walls adapted to conform with and abut against said interior and exterior wall forms respectively.
3. shaping element as defined in claim 2, wherein said outer closure walls have a peripheral extension radially-outwardly-protruding from the associated flange.
4. A shaping element as defined in claim 2, wherein said securing means further includes guiding means for guiding axial movement of said mating parts towards and away from each other while preventing their relative rotation, said guiding means maintaining said mating parts in a relative rotated position in which their respective one diametrical direction lies in one plane when said mating parts are assembled.
5. A shaping element as defined in claim 4, wherein said guiding means includes non-circular telescopic tubular elements fixed to the center of the closure wall of the respective said mating parts, extending along said longitudinal axis within said shaping element and telescopically engaged when said mating parts are assembled.
6. A shaping element as defined in claim 5, wherein said telescopic tubular elements include an outer element provided with a longitudinal slot opening at its free end, and an inner element having an outwardly-protruding tab engaging said longitudinal slot when said inner element is telescoped within said outer element.
7. A shaping element as defined in claim 6, wherein said securing means includes tie bolt means extending through said telescoped tubular elements.
8, A shaping element to define the inner surface of revolution of an opening through a wall of settable material as it is being formed between an exterior and an interior wall form, said shaping element comprising: exterior and interior mating parts, securing means to secure said mating parts in assembled position, said mating parts, when in assembled position, providing a peripheral wall configured to produce an inner surface of revolution of a desired size and shape, each of said mating parts having a longitudinal axis which is co-axial with said opening when said mating parts are assembled and each mating part having a peripheral flange with an outer end and an inner end, said outer end adapted to abut against the respective wall forms, each peripheral flange extending inwardly from its outer end and defining a portion of said peripheral wall, the flange of said exterior mating part being substantially straight in section, the flange of said interior mating part being extended at its inner end by an extension of generally L-shaped cross-section having one leg forming a radially-inwardly-extending step transverse to said longitudinal axis and having another leg extending generally parallel to said longitudinal axis, said another leg radially-inwardly-spaced from and lapping the inner end of said exterior mating part, the inner end of said exterior meting part being axially spaced from said step in the assembled position of said mating parts, the inner end of the flange of the exterior mating part and said extension providing a peripheral channel of generally L-shaped cross-section to receive and retain the radially-inward cross-sectionally angled sealing lip of an annular sealing gasket which has a radially-outer anchoring portion adapted to radially protrude from said peripheral wall to be anchored in said settable material.
9. A shaping element as defined in claim 8, wherein the external surface of each said flange is of least diameter at said peripheral channel and increases in diameter towards the outer end of each said mating part, the minimum diameter of the flange of the exterior mating part being less than the diameter of the flange of the interior mating part in the zone of said step.
10. A shaping element as defined in claim 9, wherein said interior and exterior wall forms are cylindrical and co-axial, said shaping element further including an outer closure wall for each said mating part secured to the outer end of the respective flanges and extending in a plane generally normal to said longitudinal axis, said closure walls having a curvature in one diametrical direction and being straight in a second diametrical direction normal to said one diametrical direction, the curvature of the respective closure walls adapted to conform with and abut against said interior and exterior wall forms respectively.
11. A shaping element as defined in claim 10, wherein said outer closure walls have a peripheral extension radially-outwardly-protruding from the associated flange.
12. A shaping element as defined in claim 10, wherein said securing means further includes guiding means for guiding axial movement of said mating parts towards and away from each other while preventing their relative rotation, said guiding means maintaining said mating parts in a relative rotated position in which their respective one diametrical direction lies in one plane when said mating parts are assembled.
13. A shaping element as defined in claim 12, wherein said guiding means includes non-circular telescopic tubular elements fixed to the center of the closure wall of the respective said meting parts, extending along said longitudinal axis within said shaping element and telescopically engaged when said mating parts are assembled.
14. A shaping element as defined in claim 13, wherein said telescopic tubular elements include an outer element provided with a longitudinal slot opening at its free end, and an inner element having an outwardly-protruding tab engaging said longitudinal slot when said inner element is telescoped within said outer element.
15. A shaping element as defined in claim 14, wherein said securing means includes tie bolt means extending through said telescoped tubular elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000504912A CA1229329A (en) | 1986-03-24 | 1986-03-24 | Shaping element for manhole opening and gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000504912A CA1229329A (en) | 1986-03-24 | 1986-03-24 | Shaping element for manhole opening and gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1229329A true CA1229329A (en) | 1987-11-17 |
Family
ID=4132731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000504912A Expired CA1229329A (en) | 1986-03-24 | 1986-03-24 | Shaping element for manhole opening and gasket |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1229329A (en) |
-
1986
- 1986-03-24 CA CA000504912A patent/CA1229329A/en not_active Expired
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| JPS5912283Y2 (en) | retaining wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |