US 8196968: "Lateral pipe connection assembly"



The above example shows the number of issued patents in USPTO Class 360 by filing date. The year that US Patent 4131919: "Electronic still camera" was filed appears in orange. Learn more about Patent-In-Context


Patent Overview

Patent Title: Lateral pipe connection assembly
Patent Number: 8196968 Filing Date: Jun 07, 2007
Application Number: 11759765 Issue Date: Jun 12, 2012
Back to Search Results

Claims

(click to expand)

1. A pipe connection assembly, comprising: an elastomeric sleeve having a peripheral, radially outwardly protruding stop formed thereon, the stop having a circumferential length that defines a sinusoidal-shaped path configured for engaging an aperture in a pipe wall; and a generally cylindrical rigid hub having an outer surface, one end of the hub having an outer diameter larger than an inner diameter of the sleeve but configured to fit inside of the sleeve by compression fit; wherein the hub has a rigid shoulder projecting radially outwardly from the outer surface of the hub, such that the shoulder abuts an inner surface of the sleeve adjacent to the peripheral stop and conforms to the sinusoidal shaped path of the peripheral stop, when the hub is inserted into the sleeve; wherein the sleeve and hub are assembled with the shoulder inside of the sleeve so that the shoulder on the hub is adjacent to the stop on the sleeve; and wherein a pair of diametrically opposed bosses protrude outwardly from the shoulder.

2. The connection assembly of claim 1 wherein the shoulder has a circumferential length that extends substantially continuously around the outer surface of the hub.

3. The connection assembly of claim 2 wherein the shoulder has a beveled leading edge.

4. The connection assembly of claim 3 wherein the beveled leading edge is sloped by an amount that varies along the length of the shoulder so that some portions of the leading edge have a slope that is steeper than other portions of the leading edge.

5. The connection assembly of claim 1 wherein the shoulder is comprised of discrete portions.

6. The connection assembly of claim 1 wherein the shoulder is integrally formed with the hub.

7. The connection assembly of claim 1 wherein the shoulder is attached to the hub.

8. The connection assembly of claim 1 wherein the shoulder has a beveled leading edge and wherein the bosses are contiguous with the leading edge of the shoulder.

9. A pipe connection assembly, comprising: a flexible sleeve having first and second peripheral protruding ridges formed thereon, each of the ridges having a circumferential length that defines a sinusoidal valley between the ridges for engaging an aperture in a pipe wall; and a generally cylindrical rigid hub comprising: an outer surface; an insertion end having an outer diameter larger than an inner diameter of the sleeve but configured to fit inside of the sleeve by compression fit; and a shoulder extending around and projecting radially outwardly from the outer surface of the hub; wherein, when the hub is inserted into the sleeve, the shoulder abuts an inner surface of the sleeve adjacent to one of the ridges, thereby pressing the sinusoidal valley of the flexible sleeve against the aperture in the pipe wall wherein the sleeve and hub are assembled with the shoulder inside of the sleeve so that the shoulder on the hub is adjacent to one of the ridges on the sleeve; and wherein a pair of diametrically opposed bosses protrude outwardly from the shoulder.

10. The connection assembly of claim 9 wherein the shoulder has a circumferential length that extends substantially continuously around the outer surface of the hub.

11. The connection assembly of claim 10 wherein the shoulder has a beveled leading edge.

12. The connection assembly of claim 11 wherein the beveled leading edge is sloped by an amount that varies along the length of the shoulder so that some portions of the leading edge have a slope that is steeper than other portions of the leading edge.

13. The connection assembly of claim 9 wherein the shoulder is comprised of discrete portions.

14. The connection assembly of claim 9 wherein the shoulder is integrally formed with the hub.

15. The connection assembly of claim 9 wherein the shoulder is attached to the hub.

16. The connection assembly of claim 9 wherein the shoulder has a beveled leading edge and wherein the bosses are contiguous with the leading edge of the shoulder.

References

(click to expand)

Patent Number Author Title Cited by:
1291578 McPhail Full text not available (PDF only) examiner
2039009 Lampman et al. GROMMET OR THE LIKB (OCR) examiner
2308310 Ruemelin, Jr. Jan. 12, 1943. R. RUEMELIN, JR., ET AL 29308t3lO FILTER BAG ATTACHING MEANS FOR DUST ARRESTING APPARATUS Filed May 7, 1942 (OCR) examiner
2316724 Sperry OUTLET CONNTCTOR WITH STRAINER FOR TANKS (OCR) examiner
2543909 Hatheway, Jr @T WITH SPACED, FLEXIBLE, PERIPHERAL FLANGES, RELEASABLY CONNECTIBLE TO THE RIM OF April CARTON OPENING (OCR) examiner
3033514 Grosch .IRRIGATION GATE VALVE (OCR) examiner
3246132 Jordan et al. SUPPORTING STRUCTURE FOR WASTE DISPOSAL AFFARATUS (OCR) examiner
3406988 Jones JOINT (OCR) examiner
3424481 Fulghum CLOSURE FITTING FOR DRUMS (OCR) examiner
3477745 Williams et al. QUICK CONNECTION OF PIFE TO DUCTING (OCR) examiner
3481310 Alburger PRESSURE INSERTABLE ANIMAL ACTUATED NIPPLE VALVE (OCR) examiner
3663042 Fowler Full text not available (PDF only) other
3879069 Oostenbrink Full text not available (PDF only) examiner
3922107 Fowler other
3981061 Jackson et al. Method for joining pipes examiner
4232421 Tucker Alternative diameter gasket other
4365829 Fowler Sewer tapping apparatus examiner
4441744 Oostenbrink et al. Branch pipe part examiner
4654942 Rush et al. Method of making a branched hose construction examiner
4706999 Hynes Flexible, resilient saddle for swingjoint examiner
4718700 Horch et al. T-shaped hose examiner
4738310 Luttenberger Heat exchanger other
4747625 Mignet et al. Branch pipe mounting assembly examiner
4759459 Bailey et al. Fillable tank with filler pipe retainer examiner
4887851 Rush et al. Branches hose construction, joint construction and part therefor, and methods of making the same examiner
5111858 Aittama et al. Interengageable plastic fuel flange and plastic filler tube examiner
5129684 Lawrence et al. Sealed bulkhead fitting examiner
5150928 Lodder et al. Coupling sleeve for connection of a branch pipe to a main pipe examiner
5207461 Lasko Fluid distribution apparatus examiner
5314212 Sanders Duct connector for leakfree attachment to the curved sidewall of highly flexible trunkline duct examiner
5326139 Corcoran Coupling device for branch points on a pipe examiner
5466016 Briody et al. Solderless filler neck joint examiner
5518277 Sanders Single piece duct connector for leakfree attachment to sidewall of highly flexible trunkline duct examiner
5692858 Vaughan Apparatus for soil irrigation examiner
5826919 Bravo et al. Flexible penetration fitting examiner
6051795 Fisher et al. Gimballed grommet having sections with different melt temperatures examiner
6089615 Jappinen Branch pipe connection examiner
6113156 Bea Pipe connector examiner
6224115 Blasch et al. Bulkhead fitting for underground sump examiner
6357617 Kido Hollow resin container examiner
6406067 Pritchatt Lateral pipe adaptor examiner
6508490 Hoffman Universal pipe-tank connection assembly examiner
6761380 Pachciarz et al. Filler neck assembly for fuel tank examiner
7055867 Faller Brake servo comprising a connecting element with a defined angular position examiner
20040041397 Murphy examiner
20040135367 Otsuga et al. examiner
20070181342 Duncan Hole coring system other

Description

(click to expand)

FIELD OF THE INVENTION


This invention pertains to what is known as a service connection between a main wastewater or storm water pipe and a lateral connecting pipe.

BACKGROUND AND SUMMARY OF THE INVENTION


Gravity-type pipe conveyance systems for waste or storm water generally include a mainline pipe or conduit to which service lateral pipes are connected. Many applications call for the connection of the lateral pipes to be made such that the lateral is perpendicular to the mainline pipe. Such connections are often referred to as ?Tee? connections or service connections. Alternatively, the service lateral pipe can be connected at an angle (although with the long axis intersecting the long axis of the mainline pipe) and is thus designated, for example, as a ?Wye? or 45-Degree service connection.

Service connections require a hole to be cored through the sidewall of the mainline pipe. The diameter of the cored hole is made slightly larger than the diameter of the service lateral pipe, which has a smaller diameter than the mainline pipe.

One effective service connection system is available from Inserta Fittings Inc., the assignee of the present application (www.insertatee.com) and marketed under the trademark INSERTA FITTINGS. That system comprises a three-piece service connection that is compression fit, without special tooling, into the hole that is cored through the wall of a wastewater or storm water mainline pipe. The three-piece service connection consists of a substantially rigid, cylindrical, hollow hub, one end of which fits into an elastomeric sleeve. The sleeved hub end is compression fit into the cored hole in the mainline pipe. A stainless steel band is fastened around the sleeve to secure it to the hub. The exposed end of the hub defines a conventional bell component of a bell and spigot joint, and receives the spigot end of the service lateral that is to be connected. This type of service connection may be used with any of a wide variety of pipe types (concrete, PVC, corrugated, etc).

In some instances the cored hole in the mainline pipe is not properly formed. As a result, the central axis of the hole does not intersect the long axis of the mainline pipe. Consequently, the misaligned hole made in the sidewall of the mainline pipe will be oblong rather than circular. This may result in attendant misalignment of the service connection with the mainline pipe, hence misalignment of the service lateral.

It is also possible for an installer to apply excessive axial force on the service lateral pipe when fitting the spigot end of that pipe into the connection hub. In such an instance, and especially where the cored hole is not quite circular, the excessive force may cause an undesirable amount of penetration of the sleeved end of the hub into the mainline pipe, which can result in interference with the operation and/or inspection of the mainline pipe.

The present invention is directed to an improved lateral pipe connection assembly that effects proper alignment of the lateral connection and restricts to the desired amount the penetration of the hub into the cored hole of the mainline pipe.

BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 is side view of one preferred embodiment of a service lateral pipe connection assembly constructed in accord with the present invention.

FIG. 2 is an exploded view of the service lateral pipe connection assembly.

FIG. 3 is front view of the hub component of the service lateral pipe connection assembly.

FIG. 4 is a cross sectional view of the service lateral pipe connection assembly, taken along line 4-4 of FIG. 1.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT


The service lateral pipe connection assembly 20 (hereafter referred to as ?service connection?) is shown in FIG. 1 completely connected to the mainline pipe 22, which is shown partly cut away. FIG. 1 shows the service connection 20 made to a solid-walled mainline pipe such as a PVC sewer pipe. It will be understood, however, that any of a variety of pipe configurations (ribbed, corrugated, thick-walled concrete etc) may be used as a mainline pipe. Moreover, the structure into which the service connection is made is not limited to pipes. The service connection may be similarly made to any structure requiring a lateral pipe connection, such as manholes, catch basins, vaults, and electrical boxes for example, such structures being made from any of a variety of materials (concrete, fiberglass etc).

With reference to FIGS. 1-4, the service connection 20 includes a generally cylindrical elastomeric sleeve 24, which is preferably made of rubber. The end of the sleeve that fits into the mainline pipe 22 is shaped to match the curvature of that pipe. In this embodiment, the sleeve includes an outwardly protruding stop 26 that is integrally formed with the sleeve and abuts the outer surface 28 of the mainline pipe 22 (FIG. 1). Specifically, the stop 26 is located on the outer surface of the cylindrical sleeve 24 and arranged so that when the sleeve is inserted into the hole 30 that is cored through the mainline pipe 22, the stop will rest against the upper surface 28, at the edge of the hole 30. As such, the stop 26 is shaped to define a sinusoidal path around the sleeve. The repeating curvature ?RS? of the sinusoidal stop 26 (FIG. 2) conforms to the radius of the mainline pipe to which the service connection is made (here the radius being measured to the outside diameter of the mainline pipe 22).

In this embodiment, where the connection is made to a relatively thin-walled pipe 22 the outermost end of the sleeve 24 is also provided with a resilient rib 32 that is compressed or folded and moved through the cored hole 30 as the sleeve is inserted. Once inside of the pipe 22 the rib 32 resiles or unfolds and bears against the inner wall of the pipe to resist removal of the sleeve from the hole. The rib 32, like the stop 26, extends around the sleeve in a sinusoidal path.

Once the sleeve 24 is seated within the cored hole 30 of the pipe 22, the inner end 34 of the rigid, cylindrical hub 35 is inserted into the sleeve. Preferably, the hub 35 is made of lightweight, sturdy, incompressible material, such as PVC.

The outside diameter of the inner end 34 of the hub 35 is slightly larger than the inside diameter of the sleeve 24 so that the sleeve stretches slightly to snugly fit over the hub. The innermost end of the hub is tapered 36 to facilitate insertion of the hub into the sleeve. When the hub inner end 34 is fully inserted into the sleeve 24 and the sleeved end of the assembly inserted into the cored hole, the sleeve is compressed by the wall of the hub (see FIG. 4) against the edge of the hole 30 in the pipe 22, thereby sealing the connection between the sleeved hub and pipe.

As noted earlier, the exposed end 38 of the hub 35 (FIG. 4) is shaped to define a conventional bell component of a bell and spigot joint. That end 38 carries a conventional internal gasket 39, and receives the spigot end or the service lateral pipe (not shown) that is to be connected to the mainline. The bell-component end of the hub is shown by way of example only. It will be appreciated that the exposed end of the hub can be configured for other connections.

With particular reference to FIGS. 2 and 3, the hub 35 made in accordance with the present invention includes a shoulder 40 that projects outwardly from the outer surface of the hub 35 between the inner end 34 and remainder of the hub. Along its length, the shoulder 40 is shaped to conform to the sinusoidal shape of the stop 26 on the sleeve, described above. The leading edge 42 of the shoulder is sloped or beveled.

When the hub 35 if fully inserted in the sleeve 24, the shoulder leading edge 42 bears against the interior of the sleeve 24 in a manner such that an axial, installation force applied to the hub, as depicted by arrow F in FIG. 4, will have the effect of seating the hub shoulder 40 against the stop 26 around the entire edge of the hole 30.

The seating provided by the interaction of the shoulder 42 and stop 26 as just described effects proper alignment of the hub 35 (hence, the lateral pipe) in the hole 30, and prevents undesired excessive penetration of the hub into the cored hole 30 of the pipe, which might occur, as noted above, in instances where the hole 30 is not properly formed and/or excessive axial force is applied to the connected lateral service pipe.

A pair of optional, diametrically opposed bosses 44 (FIGS. 2 and 3) are also formed in the hub. Each boss 44 comprises a generally rounded projection of the outer wall of the hub, extending outwardly slightly more than the outward extent of the shoulder 40. The leading face or edge 46 of each boss 44 is generally contiguous with the leading edge 42 of the shoulder 40 but is shaped to be relatively steeper (that is, closer to orthogonal with the outer surface of the hub) than the sloped leading edge 42 of the shoulder 40. Thus, the bosses 44 serve to provide sure stops or limits against excessive penetration of the hub into the pipe 22, and supplement the seating and aligning effect of the sinusoidal shaped shoulder 40 discussed above.

Moreover, the relatively greater extent of projection of the bosses 44 from the outer surface of the hub 35 causes a relatively tight engagement with the elastomeric sleeve 24, thereby restricting the inadvertent removal of the sleeve 24 from the hub 35 should the hub or connected lateral pipe be pulled slightly (away from the mainline pipe 22) during the connection process.

When the sleeved hub 35 is properly fit into the hole 30 in the mainline pipe, a simple stainless steel band 50 is tightened (using a fastener as shown at 52) around the outer end of the sleeve to secure the sleeve and hub.

While the foregoing description was made in the context of a preferred embodiment, it is contemplated that modifications to that embodiment may be made without departure from the invention as claimed. For example, the shoulder 40 may be a separate piece that is fastened to the separately manufactured hub. Also, the shoulder need not be a continuous member but could instead be made up of a few discrete projecting portions extending along the same sinusoidal path defined by the continuous version of the shoulder.

Patent 8196968 has been saved.
View workspace.

Welcome to Archpatent!



Want to be "in the know" about patents and patent searching?


Close this box to view patent #8196968