US3523552A

US3523552A - Passageway forming sleeve

Info

Publication number: US3523552A
Application number: US612695A
Authority: US
Inventors: John F Ogden
Original assignee: Individual
Current assignee: Individual
Priority date: 1967-01-30
Filing date: 1967-01-30
Publication date: 1970-08-11
Anticipated expiration: 1987-08-11

Description

United States Patent [72] Inventor John F. Ogden 3005 Olive St., Columbus, Ohio 43204 [21] Appl. No. 612,695 [22] Filed Jan. 30, 1967 [45] Patented Aug.ll,l970

[54] PASSAGEWAY FORMING SLEEVE 10 Claims, 6 Drawing Figs.

52 u.s.c|. 137/592, 4/172, 249/150, 249/43 [51] lnt.Cl E03b11/02, E04h 3/16, E04g 17/06 50 FieldofSearch 249/150,

152,183,184,186,65,l77,178;25/l28D,R,S, 128.1; 137/592; 248/356; 285/226; 4/172; 249/43 Primary Examiner Daniel Blum Atmmey- Jerome R. Cox

ABSTRACT: A resiliently extendible sleeve for forming voids in molded structures such as for example the walls of concrete swimming pools. The sleeve may be placed between juxtaposed mold walls where it is resiliently extended into contact with those mold walls. The preferred embodiment is a sleeve comprising two telescopically related tubes having a helical spring urging the sleeve to longitudinal extension. Each end of the sleeve is partially enclosed by a closure with a hole therethrough. Fluid carrying conduits may be positioned within the sleeve and extend out through the holes. The holes may be formed to mate with various conduits, couplings, and fixtures.

[56] References Cited UNITED STATES PATENTS 350,422 10/1886 Duffy 285/226 1,539,550 5/1925 Emery ..25/128(D)UX 2,563,578 8/1951 Candee 285/226 2,733,885 2/1956 Brownetal 248/356XR Patented Aug 11, 1970 Sheet L of 3 wwwmzw/zv INVENTOR.

JOHN F. OGDEN J ATTORNEY 5 Patented Aug. 11, 19 70 SheetiofS INVENTOR. JOHN F. OGDEN A TTORNE Y Patented Aug. 11, 1970 3,523,552

Sheet 3 of3 INVENTOR. JOHN F. OGDEN BY ym 4.1

ATTORNEY vide passageways through such layers. These may be for the PASSAGEWAY FORMING SLEEVE BACKGROUND OF THE INVENTION Field Of The Invention My invention is primarily for use in the construction and 5 building industry. Its advantages are best realized when a passageway is desired through a molded layer of concrete or similar material or structure. For example, if a passageway is to be constructed through a layer (such as a foundation wall) of concrete, plaster, asphalt or other moldable substance so that a fluid carrying pipe or electrical wire, for example, will be able to pass through such a layer, my device may be used. Specifically, l invented my passageway forming sleeve to provide water inlets for a swimming pool, the inlets being positioned below the water surface and around the periphery of the pool.

Description of the Prior Art When a contractor is constructing a molded layer, such as a concrete floor or a concrete vertical wall, he often must pro passage of conduits for water, electricity, gas, sewage, etc. from one side of the layer to the other.

One of the least desirable methods for providing such a passageway is to simply pour the moldable substance into a simple mold and let it solidify. Then remove the mold and drill or chisel the passageway through the wall. Obviously, this method produces an irregular passageway which could not mate closely with any standard conduits, fixtures, or couplings. More efficient means are available for the provision of passageways.

One of such means involves the use of a simple tube of length greater than the total thickness of the molded layer and the juxtaposed mold walls. Prior to pouring the moldable substance into the mold, circular holes of diameter equal to the outside diameter of the tube, are drilled through the juxtaposed mold walls. The tube is inserted through these holes so that it extends beyond the outer surfaces of the mold walls. The moldable substance is then poured into the mold and conformably surrounds the tube. After the moldable substance solidifies, the mold walls are removed and the ends of the tube may be cut away so that the tube does not protrude from the molded layer.

A second means for the provision of passageways through molded layers involves the use of a tube having outward annular flanges at each end. Such a tube is positioned between juxtaposed mold walls so that the ends of the tube and the flanges are flush with the inner surfaces of the juxtaposed mold walls. This tube is then nailed to the mold walls by driving several nails through the flanges into the mold walls. After the molda- 5Q ble substance has been poured and allowed to solidify, the mold walls are removed. Protruding nails may then be cut away.

There are, however, several difficulties produced by the above described means which create especially troublesome problems in the field of swimming pool construction. These difficulties can best be appreciated through an examination of the qualities or features desired in a passageway forming sleeve.

Ease and rapidity of installation and convenient use are desired by any contractor. Consequently, a passageway forming sleeve which requires a minimum of manipulation to install has a highly desirable quality.

Because passageways through moldable layers are needed for such a variety of purposes, another desirable quality in a passageway forming sleeve is its adaptability to various conduits, couplings, and fittings. A sleeve should be adaptable to mate with various component parts of a system.

Often repairs must be made or new parts introduced in a system. This could necessitate demounting from the sleeve and passageway the associated conduits, couplings, or fittings.

It is therefore a desirable quality of a passageway forming sleeve that it permit demounting of associated parts without extensive manipulation and without destruction of the passageway or the sleeve. Furthermore, reassembly should be possible without extensive manipulation.

The sleeve should be capable of cooperating with other parts to seal the passageway to avoid unintended leakage of water or other fluid.

Finally, one of the most desirable qualities of such a sleeve is that it be capable of modifying itself to compensate for a change in the mold walls. When a moldable substance is poured into a mold, the weight of the moldable substance tends to separate juxtaposed mold walls. The rods are commonly used to deter this tendency. in spite of the use of tie rods, some separation will occur. Consequently, it is desirable that a sleeve be extensible so that it is at least as long as the distance between the mold walls after they separate.

A simple tube inserted through holes in juxtaposed mold walls, as described above, requires considerable manipulation. l-loles which are the same size as the outside diameter of the tube must be drilled in mold walls to install this tube. When the molds are removed, part of this tube must be cut away to make the tube ends flush with the molded layer surfaces. Because the ends of this simple tube must be cut away after installation, the tube ends may not be specially formed to mate with associated conduits, couplings and fittings. Because the ends of the tube may not be formed to mate with other associated parts, demounting, remounting, and sealing become more difficult. It is common practice for contractors to lease forms from suppliers. The contractor is charged in proportion to the damage and destruction of the forms. Holes as large as the outside diameter of a sleeve cause substantial damage to the forms. Small holes are not objectionable.

When the tubular sleeve having annular end flanges is used, such a sleeve must be manufactured so that its length equals the exact width of the desired molded layer. Further extensive manipulation is required to nail this sleeve to the mold walls and to remove the protruding nails from the layer after the 5 mold walls have been removed. Nailing would be impossible where the mold walls are close together. Furthermore, this flanged sleeve is incapable of extending whenever the mold walls separate. Therefore, if the walls separate, the sleeve ends will be recessed within the molded layer.

Objects It is therefore an object of my invention to provide improved means for forming a passageway through a molded layer.

A further object of my invention is to provide a passageway forming sleeve requiring very little manipulation to install.

A further object of my invention is to provide a passageway forming sleeve to which associated conduits, couplings, and fittings may be conveniently, demountably and replaceably attached.

A still further object of my invention is to provide a passageway forming sleeve which expands or contracts to remain in contact with juxtaposed mold walls.

A still further object of my invention is to provide a passageway forming sleeve which may be manufactured to have portions formed to mate with a particular conduit, coupling, or fitting.

Yet a further object of my invention is to provide a sleeve which may be installed with minimal destruction of the mold wall.

Yet a further object of my invention is to provide a sleeve which permits use of non-corrosive conduits, fixtures, and couplings.

SUMMARY OF THE lNVENTlON The invention relates to a device for forming voids through molded structure and more particularly relates to a sleeve which is resiliently urged into extension or contraction to maintain its ends in contact with juxtaposed mold walls used to form the molded structure.

The resiliency of such a sleeve maintains the ends of the sleeve in a position contiguous to the mold walls even if the mold walls move apart due to the pressure exerted by a moldable fluid poured into the mold or move inward as the setting moldable material contracts. Additionally, the ends of the sleeve may be partially enclosed by closures which may be formed to mate with other couplings and fixtures so that other couplings, fixtures and conduits may be detachably connected to and through the sleeve and therefore through the molded structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a view in perspective of a structure, specifically a swimming pool, showing the nozzles at the inner ends of preferred embodiments of my invention which serve as water inlets for the swimming pool. Only the nozzle portions of the inlets are exposed in FIG. 1.

FIG. 2 is a view in section of the structure of FIG. 1, taken substantially along the line 2-2 shown in FIG. I, of a water inlet constructed according to the preferred embodiment of my invention, and showing its position in the swimming pool wall.

FIG. 3 is a view in section showing the detail of a water inlet constructed according to the preferred embodiment of my invention and positioned in a molded wall after said mold wall is set.

FIG. 4 is an exploded view of the preferred embodiment of my invention.

FIG. 5 is a view in section of an alternative embodiment of my invention.

FIG. 6 is a view in side elevation showing the preferred embodiment of my invention in position between two mold walls.

In describing in the specification, the preferred embodiment of the invention illustrated in the drawings, specific terminology will be resorted to for the sake of clarity. However, I do not intend it to be limited to the specific terms so selected, and it is to be understood that each specific term includes all technical equivalents which operate in a similar manner to accomplish a similar purpose.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Structure FIG. I shows a swimming pool, indicated generally by l. The pool comprises a base 3, inner pool walls 5 and 7 (only two of four visible), outer walls 9 and 11 (only two of four visible), a deck 13, and a splash trough 15. A plurality of inlet nozzles such as nozzles 17 are visible around the inner walls of the pool.

FIG. 2 shows the swimming pool base 3 embedded in the soil 4, an inner pool wall 7, an adjacent inner pool wall 8, an outer wall 9, and the deck 13.

Positioned below the deck 13 (See FIG. 2) is a water supply pipe 21 which surrounds the inner pool walls below the deck. Water is carried from the supply pipe 21 to my passageway forming sleeve, indicated generally by 22, through an elbow 23, a conduit 25, and a fitting 27. In FIG. 2 the sleeve 22 is seen generally to comprise two telescopically related tubes, an inner tube 31 and an outer tube 33. A helical spring 35 encircles the inner tube 31. The nozzle 36 protrudes from the inner pool wall 8 adjacent to the end of the sleeve 22. A splash trough return gutter 38 is also shown but is not a necessary part of this embodiment. I prefer that the supply pipe 21, the elbow 23, the conduit 25, and the fitting 27 be constructed of a non-corrosive material.

FIG. 4 is an exploded view showing a nozzle 36, an "0 ring 39 and parts of the preferred embodiment of my invention. The inner tube 31 ofthe two telescopically related tubes has an outward annular flange 41, and an end closure 43 having a round hole 45 therethrough. The outer tube 33 of the two telescopically related tubes has an outward annular flange 51 and an end closure (not visible in FIG. 4) having a square hole 55 therethrough. The helical spring 35 is positioned to encircle the inner tube 31. One end of the spring seats against the flange 41 on the inner tube, and the other end seats against the rim 57 ofthe outer tube 33.

Although the nozzle 36 is shown in more detail in FIG. 3 and FIG. 5, FIG. 4 shows that the nozzle 36 has a threaded passage 61, a protruding square boss 63, and a concentric circular groove 65.

FIG. 3 shows the preferred embodiment of my sleeve assembled and in position in the swimming pool inner wall. A portion of the wall 8 is also shown. The inner tube 31 is telescopically positioned within the outer tube 33. The flange 41 and the closure 43 of the inner tube 31 are also shown. The outer tube 33 has the flange 51 and the closure 53. The spring 35 is shown seated against the flange 41 and the rim 57 of the outer tube. Both the flange 51 and the flange 41 additionally serve to stabilize the sleeve within the concrete.

The nozzle 36 and the other fixtures, fittings, and conduits shown in FIG. 3 are suggested for use when an embodiment of my invention is used in swimming pool construction. However, it should be clear that other fixtures, fittings, and conduits may be used with my invention by making obvious variations in the preferred embodiments.

In FIG. 3, a conduit 71 is shown positioned centrally within the assembled sleeve and extending through the square hole 55 in the closure 53 and the round hole 45 in the closure 43 at the respective ends of the

tubes

33 and 31. One end of the conduit 71 is threadedly engaged to the nozzle 36. At the other end a jam nut 73 is threadedly secured to hold the nozzle 36 against the closure 53.

The nozzle 36 has a passage 61 and a bore 75 for the passage of water from the conduit 71, through the passage 61, and out the bore 75 into the pool. The nozzle 36 mates with the sleeve by means of the conformable positioning of the square boss 63 within the square hole 55 in the closure 53.

The 0" ring 39 fits within the circular groove 65 of the nozzle 36 and is sealingly compressed between the closure 53 and the nozzle 36. The O ring prevents leakage of water from the pool through the sleeve. The mating of the square boss 63 and the square hole 55 prevents unauthorized removal of the nozzle 36 from the conduit 71 from within the pool.

The material of which the inner tube 31 and the outer tube 33 are constructed could be metal, cardboard, ceramic, plastic, or any other suitable material. However, I prefer that both tubes, both flanges, and both closures be constructed of a synthetic plastic material. All parts of my sleeve may be manufactured in a single injection mold.

FIG. 5 shows an alternative embodiment of a passageway forming sleeve according to my invention. This alternative sleeve is designated 101 and is a corrugated, circular tube. The tube has a series of circumferential coaxial corrugations. One end of the tube is terminated with a closure 143 having a circular hole 145 therethrough. The other end is terminated with a closure 153 having a square hole 155 therethrough. The nozzle 136, conduit 171, and jam nut 173 are attached to the corrugated sleeve in the same manner as the nozzle 36, conduit 71 and nut 73 of the assembly shown in FIG. 3.

The corrugated sleeve must be made of an elastic material, such as steel, rubber, or plastic, so that it will be resiliently compressible and extendible.

FIG. 6 shows the passageway sleeve 22 illustrated in FIG. 3 but positioned in the concrete pool wall 8 between two

mold walls

81 and 82.

Operation and Advantages The advantages of my invention become apparent when the formation of a molded layer with a passageway therethrough is desired.

A molded layer is generally a solid body that is formed by pouring a fluid material into a mold and then allowing or causing the fluid to change to a solid.

A mold is a fluid container of a desired shape comprising a plurality of mold walls. Any portion of the container may be termed a mold wall. juxtaposed mold walls could be any two portions of the container which may have the moldable substance between them.

Common molded layers are the floors, ceilings, and walls of a building, highways, and swimming pool walls and bottoms. The mold used to form these molded layers usually comprises two parallel, planar structures, a bottom, and ends.

For clarity in describing the operation of an embodiment of my invention, I shall describe its operation when used to form a passageway through a vertically oriented layer formed between two parallel planar mold walls. However, it should be clear that use of my invention requires neither parallel nor planar mold walls. It may be used with most mold configurations. l begin with the assumption that a contractor has constructed two parallel, planar mold walls, such as

walls

81 and 82 in FIG. 6, separated by a distance approximately equal to the desired thickness of the molded layer. These planar mold walls may be wooden. The contractor obtains the preferred sleeve shown in FIG. 4. The spring 35 is placed on the inner tube 31, and the end of the inner tube 31 is inserted into the end of the outer tube 33. The length of the sleeve, when the spring is not compressed but is seated against the flange 41 and the rim 57, must be greater than the distance between the juxtaposed mold walls (i.e. greater than the desired wall thickness).

At the position where the passageway through the molded layer is desired, a hole 84 is drilled transversely through both juxtaposed mold walls. The preferred sleeve is then compressed and positioned between the juxtaposed mold walls so that the holes drilled in the mold walls are in substantial alignment with the round hole 45 and the square hole 55 of the sleeve.

A rod 86 may then be inserted so that it passes through all the aligned holes. This rod will hold the sleeve in the desired position. The hole drilled in the mold walls need be of no particular size. lts size is not determined by a sleeve dimension or a fixture coupling, or conduit dimension. It must only be large enough to permit insertion of the rod. The only dimensional requirement of the rod is that it be small enough to permit insertion through the aligned holes. Such small holes do not causeappreciable destruction of the forms.

The moldable substance, such as concrete, is poured into the mold and allowed to solidify.

The rod is then merely pulled from its position, and the mold walls are removed. The sleeve is ready for attachment of the fitting, couplings, and conduits desired. Completely avoided are the steps of fixing the sleeve to and detaching the sleeve from the mold walls. When the mold walls are removed, there is no protrusion of the sleeve from the molded layer. The end closure portions 53 and 43 (FIG. 3) are flush with the surface of the molded layer. Any separation of the mold walls that occurred during pouring was followed by an equal extension of my sleeve so that the outer surfaces of the

closures

43 and 53 were maintained contiguous to the inner surfaces of the mold walls and flush with the surfaces of the moldable substance. Any contractions of the molded layer are followed by an equal contraction of my sleeve. Because the

closures

43 and 53 are always maintained flush with the surfaces of the molded layer and will not be cut away, the closures may be formed into desired shapes before positioning of the sleeve in the molded substance. The shape may be any shape desired in order to allow a mating of the sleeve with the attached conduits, fixtures, and couplings. l use a square boss and hole as described above to prevent removal of the nozzle of my pool inlet. Other shapes desired could be formed on these closures.

If the construction process described above were for a swimming pool wall, the contractor would then place the 0" ring 39 in the groove 65 of the nozzle 36, screw the conduit 71 into the threaded passage 61 in the nozzle, position the conduit 71 longitudinally within the sleeve, and tighten the jam nut 73 onto the conduit 71. The conduit 71 is then attached to the supply pipe 21 as shown in FIG. 2 as described above.

Because the

end closures

43 and 53 of my sleeve may be custom made for particular couplings, fittings, and conduits, and because no moldable substance has hardened in contact with any fixture, coupling or conduit, the fixtures, couplings and conduits may be easily detached, removed, or replaced.

There are other embodiments of my invention. The sleeve could comprise more than two telescoping tubes. An alternative resilient means could be employed. The holes in the end closures could be made after the sleeve has been installed in the molded layer. The spring could be within the sleeve.

There are three essential elements in the sleeve I have invented. First, there must be a portion of the sleeve which has an outer surface. This first outer surface will, when the sleeve is placed in the mold, seat against the inner surface of one mold wall and will be flush with the surface of the molded layer. Second, there must be a second portion of the sleeve which likewise has an outer surface. This second outer surface will similarly seat against a mold wall and be flush with the surface of the molded layer. Third, there must he means for resiliently urging these two outer surfaces in opposite directions so that their position relative to the mold walls and the molded layer surfaces will be maintained if the distance between the mold walls varies.

The embodiment shown in FIG. 5 and described above has these essential elements, yet is quite different from the other embodiment shown. In the embodiment of FIG. 5, the elasticity of the material from which the sleeve is constructed provides the resiliency. The corrugations increase this resiliency. The

end closures

143 and 153 are similar to the

end closures

43 and 53 of FIG. 3. The outer surfaces of

closures

143 and 153, like the outer surfaces of

closures

43 and 53, seat against the mold walls and are flush with the surfaces of the molded layer.

Therefore, it is to be understood that while the detailed drawings and specific examples given describe preferred embodiments of my invention, they are for the purposes of illus tration only, that the apparatus of the invention is not limited to the precise details and conditions disclosed, and that various changes may be made therein without departing from the spirit of the invention which is defined by the following claims:

lclaim:

1. A device for providing a passageway through a molded wall comprising a telescopic sleeve for forming voids in a moldable substance wherein the sleeve comprises (1) a first hollow tube having one end open and having the opposite end partially closed by a first closure having a substantially concentric opening formed therein, the first hollow tube having a longitudinal first passageway therethrough communicating with said concentric opening;

(2) a second hollow tube complementary to said first tube but having a smaller diameter than the first tube, also having one end open and having the opposite end partially closed by a second closure having a substantially concentric opening formed therein, the second hollow tube having a second passageway therethrough communicating with said opening in said second closure, and having its open end slidably telescoped snugly within the open end of the first hollow tube with said second passageway communicating with said first passageway; and

(3) resilient means comprising a spring bearing effectively on both of said hollow tubes to urge them in opposite directions tending to remove the second hollow tube from telescoping arrangement within the first hollow tube.

2. A mold for forming walls of moldable substances and to provide passages therethrough, the mold comprising;

(1) a first mold wall, having a first transverse hole therethrough, for molding one surface of a wall of said moldable substance;

(2) a second juxtaposed mold wall, having a second transverse hole therethrough in substantial alignment with said first hole for molding the opposite surface of a wall of said moldable substances; and

(3) a sleeve located within the confines of the mold walls and substantially aligned with the holes, having a width substantially larger than the holes and having (a) a first end portion of said sleeve which first portion includes a first outer surface formed on a first transverse end wall, said first outer surface positioned adjacent to said first mold wall with the first transverse end wall engaging one of the mold walls;

(b) a second, opposite, end portion of said sleeve which second portion includes a second outer surface, formed on a second transverse end wall, said second outer surface positioned adjacent to said second mold wall with the second transverse end wall engaging the other of the mold walls;

(c) a spring means for resiliently urging said first portion and said second portion in opposite longitudinal directions; and

(d) means cooperating with said holes and said sleeve to prevent substantial lateral movement of the sleeve relative to the mold walls;

whereby said first outer surface and said second outer surface are oppositely forced and held adjacent to said first mold wall and said second mold wall by said spring means.

3. A mold for forming walls of moldable substances and to provide passages therethrough, the mold comprising:

(1) a first mold wall for molding one surface of a wall of said moldable substances;

(2) a second spaced juxtaposed mold wall for molding the opposite surface of a wall of said moldable substances; and

(3) a passageway forming sleeve having (a) a first end portion of said sleeve, which first portion includes a first outer surface, said first outer surface positioned adjacent to said first mold wall;

(b) a second, opposite, end portion of said sleeve which second portion includes a second outer surface, said second outer surface positioned adjacent to said second mold wall the sleeve having a passageway which extends from said first outer surface to said second outer surface; and

(c) a spring means for resiliently urging said first portion and said second portion in opposite longitudinal directions whereby said first outer surface and said second outer surface are oppositely forced and held adjacent to said first mold wall and said second mold wall by said spring means.

4. A telescopic sleeve for forming voids in a moldable substance comprising:

(l) a first portion of said sleeve having a longitudinal first passageway therethrough, which first portion includes a first outer surface at one longitudinal extremity of said sleeve, the first portion being part of a first tube having an end closure with a hole therethrough terminating the tube at a first end and having a first external annular flange intermediate its ends;

(2) a second portion of said sleeve having a second passageway therethrough communicating with said first passageway and in slidable telescopic relation to the first portion, which second portion includes a second outer surface at the other longitudinal extremity of said sleeve the second portion being a part of a second tube having an end closure with a hole therethrough terminating an end, telescopically and slidingly surrounding said first tube at the end opposite said first end of said first tube and having a second external annular flange; and

(3) means for resiliently urging said first outer surface and said second outer surface in opposite directions including means for resiliently urging said first tube and said second tube in opposite directions, said means seating against said first annular flange and said second tube.

5. A fluid transporting structure for conveying a fluid through a moldable wall, the structure comprising:

(1) a telescopic sleeve for forming voids in a moldable substance, the sleeve comprising:

(a) a first portion of said sleeve having a longitudinal first passageway therethrough, which first portion includes a first outer surface at one longitudinal extremity of said sleeve;

(b) a second portion of said sleeve having a second passageway therethrough communicating with said first passageway and in slidable telescopic relation to the first portion, which second portion includes a second outer surface at the other longitudinal extremity of said sleeve;

(c) means for resiliently urging said first outer surface and said second outer surface in opposite directions wherein the telescopic sleeve comprises a tubular conduit, comprising a plurality of coaxial telescopic tubes, having at each opposite end of said conduit a closure with a hole therethrough partially enclosing each opposite end of said conduit, one closure including said first outer surface and the other closure including said second outer surface;

(2) a fluid pipe positioned longitudinally within said conduit;

(3) nozzle means connected to one end of said pipe; and

(4) fluid transporting and supply means connected to the other end of said pipe.

6. The structure of Claim 5 wherein annular flanges are attached to the exterior of said conduit.

7. The structure of Claim 5 wherein the wall of one end of said conduit has a polygonal hole therethrough and wherein said nozzle means has a boss extending therefrom which has a shape complementary to said hole whereby said boss may be fittingly inserted in said hole to prevent rotation of said nozzle means.

8. The fluid transporting structure of Claim 5 wherein (1) said tubular conduit comprises two telescopic tubes of circular cross section, one end enclosed by a closure with a circular hole therethrough, the other end enclosed by a closure with a square hole therethrough, and each of said two tubes having an annular flange;

(2) said resilient means is a helical spring, coaxial with said tubular conduit;

(3) said fluid pipe has threaded ends;

(4) said nozzle means has a circular, planar, base portion having a circular groove concentrically therein and having a square boss protruding therefrom mating into said square hole, and wherein said nozzle means is threadedly connected to said fluid pipe; and

(5) a circular sealing ring is compressed between said circular groove and said closure having a square hole therein.

9. A device for providing a passageway through a molded wall comprising:

(1) a hollow tube having one end open and having the opposite end partially closed by a closure forming a first outer surface at one longitudinal extremity of the sleeve, the closure having a substantially concentric opening formed therein;

(2) a second hollow tube complementary to said first tube but having a smaller diameter than the first tube, also having one end open and having the opposite end partially closed by a closure forming a second outer surface at the other longitudinal extremity of the sleeve, the closure having a substantially concentric opening formed therein and having its open end telescoped snugly within the open end of the first hollow tube; and

(3) a helical spring surrounding said hollow tubes and bearing effectively on both of said hollow tubes comprising means to resiliently urge said first outer surface and said second outer surface in opposite directions and tending to remove the second hollow tube from telescoping arrangement within the first hollow tube.

10. A fluid transporting structure for conveying a fluid through a moldable wall, the structure comprising:

(1) a tubular conduit, comprising a plurality of coaxial telescopic tubes, having at each opposite end of said conduit a closure with a hole therethrough partially enclosing each opposite end of said conduit;

(2) resilient means for resiliently urging said telescopic tubes apart in a coaxial direction;

(5) fluid transporting and supply means connected to the other end of said pipe.

" UNITED STATES PATENT OFFICE 6 CERTIFICATE OF CORRECTION Patent No. 3523552 Dated gust 11, 1970 InventorM/l John F. Ogden It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 2,

lines

8 and 9 should read Tie rods are commonly used... rather than "The rods are commonly used.

SIGNED M RENE OCT 271970 .SEAL

Attest:

Edward M. Fletcher, Jr. W I, m, a, Amsfing Gal-185E116! (if