MX2014000069A - Drain assembly for a bathtub and the like. - Google Patents

Abstract

A drain assembly including a drain pipe with a threaded portion and a nut is provided. The drain pipe includes a first end, an elbow portion, and a second end. The first end includes an annular flange and the threaded portion. To interconnect the drain assembly to a bathtub, the second end of the drain pipe is inserted through a drain port of the tub until the annular flange abuts a bottom wall of the tub. The nut is then threaded onto the threaded portion of the drain pipe to secure the drain pipe to the bathtub. The second end of the drain pipe is then interconnected to drain plumbing.

Description

DRAIN ASSEMBLY FOR A BATHTUB AND SIMILAR DESCRIPTION OF THE INVENTION The traditional method for interconnecting a drain and plumbing associated with a bathtub generally involves coupling a flange associated with the drain pipe to the lower surface of the bathtub while aligning an opening of the flange and the drain outlet of the bathtub, which is an "occultation" operation. Next, while maintaining the position of the flange, a filter body, which includes an outwardly extending flange, is inserted into the drain outlet and interconnected to the drain pipe where the flange of the filter body It fits on the inside surface of the bathtub. The filter body has a threaded outer surface that interconnects with the threaded inner surface of the drain pipe. Tightening the filter body over the drain pipe rigidly attaches the drain pipe to the bathtub. Frequently, a seal is also placed between the drain pipe flange and the bottom surface of the tub. The traditional installation method is problematic and difficult because it requires several components to remain in place during assembly.

In addition, traditional drainage assemblies are difficult to test. More specifically, pipes associated with the tub drain and the overflow outlet must undergo leakage testing after installation. The leak test involves filling the entire plumbing system with water through a vent connected to the drain. After a predetermined amount of time, the leaks will be apparent if the water level in the vent pipe falls. To perform the leak test, the drain outlet and the overflow port are plugged or otherwise sealed. Due to the risk of damage, plumbers prefer not to use the final closing valve, that is, plug, to block drainage. Therefore, the common test method requires the removal of a plug supplied by the plumber, which adds a stage to the installation method.

Thus, there is a long-standing need for a drain assembly that can be installed by an individual that also facilitates leak testing.

It is an aspect of the present invention to provide a drainage assembly that can be installed by an individual. More specifically, in one embodiment of the present invention a drainage pipe having a threaded outer surface receiving a nut is provided. The upper edge of the drain pipe includes an outwardly extending flange that engages the interior surface of the bathtub. The nut threadably couples the threaded portion of the drain pipe from under the tub that intercalates the bottom wall of the bathtub between the flange and the nut. As used herein, a "tub" may include, but is not limited to, a bathtub, a shower base, or any other fluid retention basin. Because the drain pipe is placed inside the outlet from the inside of the tub and secured with the nut after the drain pipe is supported by the bottom surface of the tub, an individual can install the drain assembly contemplated. After associating the drain pipe with the tub, the plumber can interconnect the drain pipe to the drain plumbing.

In one embodiment, the drain pipe includes a first end, a second end, and an elbow positioned therebetween. In one embodiment, a maximum diameter of the second end, the elbow portion, and a substantial portion of the first end is less than the diameter of the drain port. In this way, the second end of the drain pipe can be placed through the tub drain port and effectively "hung" from the bottom surface of the tub. More specifically, the first end includes an annular flange having a maximum diameter that is larger than the diameter of the drain port. When placed in this manner, the threaded portion will be placed at least partially on the outside of the tub. The threaded portion has a maximum diameter that is smaller than the diameter of the drain port, and is configured to receive a threaded nut. A sealing element can be provided between the lower surface of the tub and the nut to improve the interconnection between the tub and the drain port.

In one embodiment, a drain pipe accommodates at least one selectively removable membrane, an integrated filter body, and a drain closure. The drain closure can also be removed selectively from the drain pipe. The drainage closure, i.e., the plug, is operatively interconnected to the drainage pipe by a support post which is interconnected to the cross bars integrated in or selectively associated with the drain pipe. For example, the cross members of one embodiment are associated with a ring that is threadably secured to an interior surface of the drain pipe or fit by interference in the drain pipe.

Other embodiments of the present invention do not require a filter body. More specifically, a threaded bore or bore for receiving a drain plug can be integrated into the elbow or other portions of the drain pipe. In addition, crossbars and buckets for receiving drain plugs can be integrated into the drain pipe. In yet another embodiment of the present invention, the crossbeams for receiving a drainage assembly They are associated with the ring that fits inside the drain pipe. The ring can be adjusted by interference inside the drain pipe or threadedly attached to the threads located in the drain pipe.

Regardless of whether a filter body or other member is used to receive a drain plug assembly, embodiments of the present invention are capable of receiving shutters of various types and manufacturers. More specifically, Push / Pull drainage closure devices, which are described in U.S. Patent No. 6,418,570, Elevating and Spinning Drain Closing Devices, which are described in U.S. Patent No. 5,758,368. , and Pressflo ™ drainage closure devices, which are described in U.S. Patent No. 6,226,806, can be accommodated. This list is not exhaustive, and one of skill in the art will appreciate that other drainage closure devices may be used in conjunction with the contemplated drainage pipe without departing from the scope of the invention. In addition, the claims concealing the devices, such as Quick Trim ™, which are described in U.S. Patent No. 7,503,083 can be used with the drain pipe described herein. All of the above patent references are incorporated herein by reference.

It is another aspect of the present invention to reduce the leak points in the drain assembly. More specifically, one embodiment of the present invention employs an elbow that is integrally interconnected with a straight portion of the drain pipe that is interconnected to the home plumbing system, for example. In this mode, the elbow is melted, emptied or molded together with the linear portion of the drain pipe. In this way a cut is removed, which is often required to couple the linear portion of the drain pipe with the elbow. In addition, a seal is also removed. One skilled in the art will now appreciate that the reduction of the joints is advantageous.

The drain pipe, and related components may be made of common materials used in the art, including, but not limited to, copper, PVC, plastic, or any other suitable material.

It is another aspect of the present invention to provide a drain assembly adapted for interconnecting a tub having a drain port formed in a bottom wall, the drain port having a diameter, the drain assembly comprising: a drain pipe that includes a first portion, a second portion, and an elbow portion positioned therebetween, and integrally connecting the first portion and the second portion, the first portion includes an annular flange and a portion threaded placed between the annular flange and the elbow portion, wherein the threaded portion, the elbow portion, and the second portion have a maximum diameter that is smaller than the diameter of the drain port, and wherein the annular flange has a maximum diameter that is larger than the diameter of the drain port; a nut configured to threadably couple the threaded portion of the drain pipe to secure the drain pipe in the bottom wall of the tub; and a crossbar insert positioned within the first portion of the drain pipe.

Yet another aspect of the present invention is to provide a drain elbow adapted to interconnect a tub having a drain port formed in a bottom wall, the drain port has a diameter, the drain elbow comprises: a first portion that includes an annular flange and an externally threaded portion, the annular flange has a maximum diameter that is larger than the diameter of the drain port; a second portion; and an elbow portion positioned between and integrally connecting the first portion and the second portion, wherein the externally threaded portion is positioned between the annular flange and the elbow portion, and wherein the externally threaded portion, the elbow portion, and the second portion have maximum diameter that is less than the diameter of the drainage port.

It is another aspect of the present invention to provide a drain elbow adapted for interconnecting a tub having a drain port formed in a bottom wall, the drain port having a diameter, the drain elbow comprises: a first portion that includes a annular flange and an externally threaded portion, the annular flange has a maximum diameter that is larger than the diameter of the drain port; a second portion; an elbow portion positioned between, and integrally connecting the first portion and the second portion, wherein the externally threaded portion is positioned between the annular flange and the elbow portion, and wherein the externally threaded portion, the elbow portion, and the second portion has a maximum diameter that is smaller than the diameter of the drain port; and a crossbar insert placed within the first portion The Summary is not intended nor should be construed as representative of the full extent and scope of the present disclosure. The present description is established in several levels of detail in the Summary of the invention as well as the attached drawings and the Detailed Description and no limitation as to the scope of the subject matter claimed is intended by the inclusion or non-inclusion of the elements, components, etc., in this Summary of the invention. Furthermore, reference is made herein to "the present invention" or aspects thereof should be understood to signify certain embodiments of the present disclosure and should not necessarily be construed as limiting all modalities to a particular description.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side elevation view of a modality of a drainage assembly interconnected to a bathtub; Figure 2 is a side elevational view of an embodiment of a drainage assembly interconnected to a bottom wall of the bathtub; Figure 3 is a side elevation view of another embodiment of a drainage assembly interconnected to a bottom wall of the bathtub; Figure 4 is a side elevational view of another embodiment of a drainage assembly interconnected to a bottom wall of the tub; Figure 5 is an exploded perspective view of one embodiment of a drain assembly and a T-connector; Figure 6 is a cross-sectional view of another embodiment of a drain assembly interconnected to a T-connector; Figure 7 is a perspective view of a drain pipe of one embodiment of the present invention; Figure 8 is a top plan view of the Figure 7; Figure 9 is a front elevational view of Figure 7; Figure 10 is a view in straight elevation of the Figure 7; Figure 11 is a cross-sectional view of Figure 7; Figure 12 is a detailed view of the Figure eleven; Figure 13 is a perspective view of a nut used by an embodiment of the present invention; Figure 14 is a top plan view of Figure 13; Figure 15 is a cross-sectional view of Figure 13; Figure 16 is a perspective view of a sealing element used by an embodiment of the present invention; Figure 17 is a top plan view of the Figure 16; Figure 18 is a side elevational view of Figure 16; Figure 19 is a cross-sectional view of Figure 18; Figure 20 is a cross-sectional perspective view of an embodiment of a drainage assembly including a drainage closure threadably coupled to a transverse bar insert; Figure 21 is a cross-sectional perspective view of an embodiment of a drainage assembly including a membrane and a crossbar insert; Figure 22 is an elevation view in cross section of a drainage assembly embodiment including a crossbar insert; Figure 23 is an elevation view in cross section of a drainage assembly embodiment including a threaded cross bar insert; Figure 24 is a perspective view of a crossbar insert used in conjunction with some embodiments of the present invention; Figure 25 is a top plan view of the Figure 24; Figure 26 is a side elevation view of Figure 24; Figure 27 is a cross-sectional view of Figure 26; Figure 28 is an elevation view in cross section of a drainage pipe embodiment that includes an integral cross member for receiving a drain plug carrier; Figure 29 is an elevation view in cross section of a drainage pipe embodiment including a bucket extending upwardly for receiving a drain plug carrier; Figure 30 is an elevation view in cross section of a drainage pipe embodiment including a threaded hole formed in the elbow portion that receives a drain plug carrier; Figure 31 is a perspective cross-sectional view of a drainage assembly including a membrane, a nut, a sealing element, and a drainage pipe having a concave inner surface; Figure 32 is a cross-section elevation view of an embodiment of a drain assembly including a finishing plate and a drain closure interconnected to a drain pipe; Y Figure 33 is an elevation view in cross section of a drainage assembly embodiment including a finishing plate extending downwardly with a drainage closure associated therewith.

To aid in the understanding of the drawings, the following is a list of the associated components and numbering found in the drawings.

# Components 2 bathtub 6 Drainage louver 10 Bottom wall 14 Overflow lumenra 18 Side wall 22 Drainage assembly 26 Overflow assembly 30 T-connector 34 Drainage pipe 38 Nut 42 Grifo 46 Interior wall 50 First extreme 54 Second extreme 55 Pipe adapter 56 Pipe 57 Primary drainage 58 Annular tab 62 Threaded portion 66 Membrane 70 Top surface 74 Bottom surface 78 Elbow 82 Drainage closure 86 Cross members 90 Cover 94 Insert crossbar 98 Cube 102 Threaded aperture 106 Carrier 110 Filter body cover 114 Sealing element 118 Annular flange 122 Inside surface of drain pipe 126 Ring ring 130 Internally threaded portion 134 Threaded hole 138 Concave portion 142 Insertion of drain closure 146 Annular notch 150 Threads 154 Top surface 158 Bottom surface 162 Upper boss 166 Lower protuberance 170 Outside surface It should be understood that the drawings do not necessarily They are to scale. In certain cases, details that are not necessary for an understanding of the description or that make other details difficult to perceive may have been omitted. It should be understood, of course, that the subject matter claimed is not necessarily limited to the particular embodiments illustrated herein.

With reference to Figures 1-11, a bathtub 2 includes a drain port 6 provided in a bottom wall 10 and an overflow port 14 provided in a side wall 18. A drain assembly 22 is interconnected to the bottom wall 10 and it is associated with the drain port 6, and an overflow assembly 26 is interconnected to the side wall 18 and associated with the overflow port 14. A T-connector 30 interconnects the drain assembly 22 and the overflow assembly 26. The drain assembly 22 includes a drain pipe 34, which may be generally L-shaped, which is connected to the bath 2 with a nut 38. The drain pipe 34 has a first end 50 associated with the bottom wall 10 of the bath 2, and a second end 54 that is interconnected to the T-connector 30. The first end 50 includes an annular flange 58 and an externally threaded portion 62. A membrane 66 can be interconnected to the first end 50 of the drain pipe 34 to assist in the leakage test.

The drain pipe 34 is interconnected to the tub 2 by first inserting the second end 54 through the drain port 6. The annular flange 58 then engages the upper surface 70 of the lower wall 10. The sealing material, which can also create a leak barrier, can be placed on the lower surface of the annular flange 58 to additionally secure the annular flange to the lower wall 10 of the bathtub 2. Next, a nut 38 is placed on the second end 54 of the drain pipe 34 and slides along the drain pipe 34 towards the bottom wall until it reaches the threaded portion 62 of the drain pipe 34. The nut 38 is threaded onto the threaded portion 62 of the drain pipe 34 and is pressed against a lower surface 74 of the bottom wall 10 rigidly connecting the drain pipe 34 to the bathtub 2 around the drain port 6. A sealing element (See Figure 2, With reference to No. 114, for example) can be additionally placed between the nut 38 and the lower surface 74 of the lower wall 10.

The lower wall 10 of the bathtub 2 is interposed between the annular flange 58 of the drain pipe 34 and the nut 38 internally threaded. After the first end of the drain pipe is interconnected to the bathtub 2, the second end 54 of the drain pipe 34 is connected to the T-connector 30. The drainage system that it includes the drain assembly 22, overflow assembly 26, and the T-connector 30, then they are leak tested. Finally, a drainage closure is operatively associated with the first end 50 of the drainage pipe 34. In the above form, a simple individual can interconnect the drain assembly 22 to the drain port 6 of the bathtub 2.

The membrane 66, or diaphragm, is sealed at the first end 50 of the drain pipe 34 in the annular flange 58 for leakage testing. In one embodiment, the membrane 66 is automatically sealed in the first portion 50, and can be constructed of a material that can be easily pierced or removed. For example, the membrane 66 can be constructed of a plastic material, flexible rubber, or the like. After a successful leak test, a plumber can remove the membrane 66 with a pointed object, as described in related US Patent No. 8,302,220.

In most cases, a drain latch 82 is associated with the first end 50 of the drain pipe 34. The drain closure 82 can be of any conventional type, including Raise and Turn, Foot Operated, or PUSH-PULL ™ closures to name a few, which are mentioned in the foregoing. Likewise, a PRESFLO ™ drainage closure, such as that described in U.S. Patent No. 4,457,030 to Burry and U.S. Patent No. 6,226,806, which are incorporated herein by reference. reference herein, may be used in conjunction with some embodiments of the present invention. The drain pipe 34 may include a crosspiece 86 and hub 98, which are typically found in felt bodies. The hub secures a carrier that operatively receives the shutter. The cross member 86 can be integrated into the drainage pipe or otherwise interconnected therewith. A cover 90 can be secured to the flange 58 to substantially cover some and provide a finished appearance. The cover 90 may be comprised of a lining device that effectively hides the annular flange 58 as described in U.S. Patent No. 7,503,083 and U.S. Patent Application Publication Nos. 2011/0209279 and 2013/0055494 , which are incorporated herein by reference.

Figures 3 and 4 show other methods that interconnect drain pipe 34 to primary drain 57. In Figure 3, the drain includes an elbow extending from the annular flange 58. The elbow 34 is interconnected to a pipe 56 by means of an adapter 55. The pipe 56 also interconnects a T-connector 30 that connects the primary drain 57 to a pipe associated with the overflow assembly (see Figure 1, for example) . In Figure 4, the drain assembly includes a vertically oriented pipe extending from the flange 58 cancel. The drain assembly 22 is interconnected directly to the T-connector 30 which is also interconnected to the primary drain 57 and to a pipe 56 associated with the overflow assembly. These two alternative methods for interconnecting the drain assembly 22 provide more installation options and flexibility to the plumber. Those skilled in the art will appreciate that various other forms may be employed to interconnect the drain assembly 22 to the overflow assembly and to the plumbing 57 for primary drainage of the dwelling. For example, portions of the drain assembly 22 that interconnect to the T-connector 30 or the primary drain 57 may be flexible as described in U.S. 2008/0196161, which is incorporated herein by reference.

Figures 6-12 show the drainage pipe 34 of an embodiment of the present invention, which is comprised of a first end 50 that includes the flange 58 extending outwardly. The threads 62 mentioned in the above are located under the flange 58. A second end 54 of the drain pipe 34 is connected to the first end 50 by means of an elbow 78. Because the space is limited under the bathtub, it is advantageous minimize the size of the elbow. However, the elbow should be large enough to allow installation over the tub and to accommodate the nut. In one embodiment of the present invention, the elbow 78 it is interconnected to the second end 54, which may be the schedule 40 pipe, by means of common plumbing interconnection methods. In another embodiment of the present invention, the first end 50, the elbow 78, and the second end 54 are created in a molding process and thus, comprise a single unit. The second end 54 of one embodiment complies with the dimensions and tolerances of Schedule 40 so that they can be received in common drainage attachments. In addition, the second end, which comprises a generally horizontal portion of the drain pipe 34 may be at an angle approximately 0.25 ° from the horizontal plane defined by the flange 58 extending outwardly. In addition, as shown in Figures 11 and 12, the first end 50 can be threaded on an inner surface thereof, which will be described in detail below. In addition, the first end may include a flange 118 for receiving the closure member, such as a membrane 66, which will also be described below.

The threads 62 are formed in such a way as to facilitate the insertion of the drain pipe 34 into the drain port of a bathtub. In one embodiment of the present invention, the threads 62 have a square or round profile, i.e. they are comprised of Recessed rectangles, so they fit easily inside the drain port of the bathtub. Because the drain pipe must be adjusted Through drainage port openings as well as approximately 5.8 centimeters (2.0 inches) in diameter, the main diameter of the threaded portion can not be greater than the diameter of the drain port. The smaller diameter of the threaded portion can not be smaller than the diameter of the drain pipe. The length of the threaded portion should be long enough to accommodate the lower wall thickness of the tub, but small enough so as not to adversely affect the size of the elbow 78.

Drain pipe 34 of one embodiment of the present invention is formed of PVC by ASTM D1784-90, class 12454-B, and is mechanically performed by ANSI / ASTM D-2466-90A. In addition, the drain pipe 34 can be formed of PVC with white pigment that can be laminated in chrome.

Figures 13-15 show the nut 38 used in some embodiments of the present invention. The nut 38 includes internal threads 150 that selectively couple the external threads of the drain pipe. The nut 38 also generally includes the frusto-conical top surface 154 and the bottom surface 158. The upper and lower surfaces may alternatively have a concavity for receiving a sealing member, which can be described in detail below with respect to Figures 16-19. The internal diameter of the threads 150, which may have a commensurate profile so that the drain pipe threads are designed to fit over a schedule 40 drain pipe and are capable of traversing the elbow without bonding or without difficulty.

Figures 16-19 show the sealing member 114 used with some embodiments of the present invention. The sealing member 14 is designed to fit over the second end 54 of the drainage pipe, the transition around the elbow, and engaging the bottom surface of the tub as shown in Figure 2. The sealing member 114 is maintained instead by the nut, which compresses the sealing member 114 against the lower surface of the tub when it is tightened. The contemplated sealing member 114 provides a watertight connection, which may allow installers to forget the use of a sealing mastic. In one embodiment of the present invention, the seal is formed of an elastomeric material having a density of approximately 0.999 g / cm3 (0.0361 pounds) per cubic inch and weighing approximately 0.011 kg (0.025 pounds). The surface area of the sealing member 114 is approximately 59.35 cm2 (9.2 inches2). The sealing member 114 of this embodiment of the present invention may further include an upper protrusion 162 and a lower protrusion 166 which are internally positioned to the outer surface 170 of the sealing member 114. The protuberances are designed to interconnect with the frusto-conical surface of the nut to facilitate the hermetic interconnection between the drain pipe and the tub.

Figure 20 depicts an embodiment of a drainage assembly 22 including a drainage closure 82 interconnected to a cross member insert 94. The crossbar insert 94 includes a hub 98 having a threaded opening 102 configured to receive a threaded end of a carrier 106 that slidably receives the drain seal 82. The carrier 106 is inserted through a filter body cover 110, which interconnects the flange 58. As in the embodiments described above, a nut 38 is threadably engaged on the threaded portion 62 with an element 114. of sealing placed between them Figures 21 and 22 illustrate one embodiment of a drainage assembly 22 employing a membrane 66 and a cross member insert 94 having a threaded hub 98. The membrane 66 is placed over at least a portion of the flange 58 or is fixed to the annular flange 118 of the drain closure 34 at the first end 50 of the drain elbow 34. The annular rim 118 is formed on the upper surface of the annular flange 58 as the flange 58 makes transition on the inner surface 122 of the first end 50 of the drain pipe 34. In an alternative modality, the annular shoulder 118 is formed on an interior surface of the first end 50 of the drain pipe 34. The annular flange 118 can be configured to interconnect several devices to the drain pipe 34, which includes, but is not limited to, a membrane 66, a cover 110, and a filter body.

With reference to Figures 22 and 23, various ways of placing crossbars within the drain pipe are depicted. In one embodiment, the crosspiece 94 is adjusted by interference in the drain pipe 34. The crossbar insert 94 includes at least one cross member 86 interconnecting an annular ring 126 to the hub 98. The hub 98 may include a threaded opening 102 configured to threadably receive the threaded end of a carrier, which operatively receives a drain 82.

With reference to Figures 23-27, a cross member insert 94 includes a threaded annular ring 126 that threadably couples a threaded portion 130 of the drain pipe 34. The cross member insert 94 may alternatively have a smooth outer surface for interference fit within the internal diameter of the drain pipe 34 as shown in Figure 22. Alternatively, the cross members 86 may be formed integrally in the drain pipe 34. as shown in Figure 28.

Figures 29 and 30 illustrate other methods for integrating a bucket for receiving a drain closing mechanism with the drain pipe. In Figure 29, an upwardly extending hub 98 is integrally connected to the elbow 78 of the drain pipe 34. The hub 98 extends into an interior space near the first end 50 of the drain pipe 34 and includes a threaded hole 134 that receives a threaded end of the carrier 106.

Referring now to Figures 31-33, various embodiments of a drainage assembly 22 utilizing a drain seal 82 are provided. Figure 31 depicts a drain pipe 34 that includes a concave portion 138 formed in an interior surface 122 that is configured to receive a drain seal 82 that fits or fits through interference within the concave portion 138 of the pipe 34 of sewer system. In one embodiment, the concave portion 138 of the drain pipe 34 receives a PRESFLO ™ drainage closure. Also as illustrated in Figure 32, a cover 90, which often includes a filter, can be interconnected to the drain pipe 34 to prevent air from entering the drain pipe, for example. In one embodiment, the cover 90 is adjusted by interference on the annular flange 58 and the annular flange 118 of the drain pipe 34.

Figure 33 shows a drainage closure insert 142 interconnected to the drainage pipe 34 and is able to accommodate the drainage closure device, such as the PRESFLO ™ drainage closure. The drainage closure insert 142 may alternatively have external threads that selectively couple the threads located within the drainage pipe 34 similar to that shown in Figure 23.

The drainage assembly as described herein may be used in conjunction with a foot operated drain plug as taught by US Patent Application Serial No. 13 / 912,421, filed on June 7, 2013, which it is incorporated for reference in its entirety herein. The drain plug described in U.S. Patent No. 5, 758,368 (Elevate and Turn), U.S. Patent No. 6,066,119 (PRESFLOW), and U.S. Patent No. 6,418,570 (push / pull), may be used with respect to the embodiments of the present invention. In addition, inserts, which conceal the outer surface of the flange extending outwardly from the drain pipe may be used in conjunction with the embodiments of the present invention. Such devices are described in U.S. Patent No. 5,745,931 and U.S. Patent No. 7,503,083, and pending patent applications related thereto. Such patents and pending applications are incorporated herein by reference.

Although several modalities have been described in detail herein, it is apparent that modifications and alterations of those modalities will be presented to those of skill in the art. It will be expressly understood that such modifications and alterations are within the scope and spirit of the claimed invention, as set forth in the following claims.

Claims (15)

1. A drainage assembly adapted for interconnecting a tub having a drain port formed in a bottom wall, the drain port having a diameter, the drain assembly characterized in that it comprises: a drainage pipe including a first portion, a second portion, and an elbow portion positioned therebetween, and integrally connecting the first portion and the second portion, the first portion includes an annular flange and a threaded portion positioned between the annular flange and elbow portion, wherein the threaded portion, the elbow portion, and the second portion have a diameter that is smaller than the diameter of the drain port, and wherein the annular flange has a maximum diameter that is larger than the diameter of the drain port; a nut configured to threadably couple the threaded portion of the drain pipe to secure the drain pipe to the bottom wall of the tub; Y a crossbar insert positioned within the first portion of the drain pipe.

2. The drainage assembly according to claim 1, further characterized in that it comprises minus one sealing element placed between the annular flange and the nut.

3. The drainage assembly according to claim 1, characterized in that the first portion further comprises a flange associated with the inner surface and adjacent an upper surface of the annular flange.

4. The drainage assembly according to claim 3, further characterized in that it comprises a membrane interconnected to the flange.

5. The drainage assembly according to claim 1, characterized in that the threaded portion comprises a series of blunt threads.

6. The drainage assembly according to claim 1, characterized in that the nut has an upper surface and a lower surface, the surfaces have a frusto-conical shape.

7. The drainage assembly according to claim 6, further characterized in that it comprises a seal that is adapted to contact the upper surface and the lower surface of the bathtub.

8. The drainage assembly according to claim 7, characterized in that the seal includes a protuberance on at least one upper surface and a lower surface thereof.

9. The drainage assembly according to claim 1, further characterized in that it comprises a membrane interconnected directly to the annular flange.

10. A drain elbow adapted for interconnection to a tub having a drain port formed in a bottom wall, the drain port having a diameter, the drain elbow characterized in that it comprises: a first portion that includes an annular flange and an externally threaded portion, the annular flange has a maximum diameter that is larger than the diameter of the drain port; a second portion; an elbow portion positioned between and integrally connecting the first portion and the second portion, wherein the externally threaded portion is positioned between the annular flange and the elbow portion, and wherein the externally threaded portion, the elbow portion, and the second portion has a maximum diameter that is smaller than the diameter of the drain port; Y a crossbar insert placed inside the first portion.

11. The drainage elbow according to claim 10, characterized in that the first portion further comprises a flange formed on an upper surface of the annular flange adjacent to an opening of the drain elbow, wherein the flange is configured to receive at least one of a membrane and a filter body cover.

12. The drainage elbow according to claim 10, characterized in that the transverse insert is threadably secured to the inner surface of the drainage elbow.

13. The drain elbow according to claim 10, characterized in that the crossbar insert is adjusted by interference within the inner surface of the drain elbow.

14. The drain elbow according to claim 10, characterized in that the crossbar insert includes a hub having a threaded opening configured to receive a threaded post of a drain closure.

15. The drainage elbow according to claim 10, characterized in that an interior surface of the first portion includes a concave portion configured to receive a drainage closure.