KR100210826B1 - System and method of draining window frames - Google Patents

Abstract

Drainage systems and drainage methods of extruded windowsill frames 22 and 72 are presented.

This drainage system has a drain cap 54 which provides two separate drainage passages 66 and 68 to the windowsills 22 and 27. The drain cap 54 is installed at the drain hole of the bottom edge of the outer jaw surface 34. The drain cap 54 has an inclined portion 64 for guiding water drained through one drainage passage 68 from the front of the windowsill and water drained through another drainage passage 66 from the rear of the windowsill. . Since the drain cap 54 is installed using a predetermined method, the windowsill 22 and 72 located between the drain hole of the bottom of the outer jaw surface 34 and the drain holes 46, 48, 50 and 52 of the window surface 38. A predetermined longitudinal partition of the through is formed. The drainage channel is formed using a horizontal drilling machine with drill bits 52 having at least two diameters capable of drilling two concentric holes in one operation. Alternatively, two or more bits 74 and 76 are used to drill two or more holes extending together in an eccentric state.

Description

[Name of invention]

Drainage system and method of window frame

[Technical Field]

The present invention relates to an extrusion window component, and more particularly to a drainage system of an extrusion window frame jaw.

Draining rainwater and condensate from windowsills is a long known problem in the window industry. This problem is particularly acute on windowsills that accommodate windows of both horizontal and vertical sliding type, but is not limited thereto. In general, all windowsills require some form of drainage system, and the more complex the windowsill design, the more difficult it is to provide an effective drainage system at a reasonable cost.

[Background]

There are many conventional patents relating to the drainage system of the windowsill that effectively drains rainwater and / or condensate while preventing the moisture in the wind from penetrating into the building. Known prior art patents relating to this aspect are as follows.

Canadian Patent No. 996,820-David Paull

United States Patent No. 4,003,171-Mitchell

United States Patent No. 4,156,998-Grover

British Patent No. 1,537,347-Clive Investment Pty.

British Patent No. 2,022,179-Braithwaite

French Patent No. 2,288,211-Monteau

French Patent No. 2,240,341- Schinhofen

French Patent No. 2,250,888-Monteau

French Patent No. 2,336,860-Schurmann

The prior art patents described above describe various drainage systems of windows and windows, many of which are suitable for use in extruded window frame jaws. A common problem with these prior art systems is their complexity, which is unreliable or difficult to manufacture and therefore not cost effective.

Building standards in many countries around the world are very stringent in preventing rainwater or condensate from entering the building through the window structure. Window drainage systems are generally the most common solution for storm intrusion through window structures. Ideally, the window drainage system facilitates drainage of rainwater and / or condensate while preventing strong water from entering rainwater or condensate across the window into the interior of the building.

The design of effective drainage systems is further complicated by state-of-the-art extrusions, in particular plastic extrusions, which are designed to maximize the strength of the extruded window frame jaws while minimizing the use of plastic material. Modern window jaws made of extruded thermoplastic to maximize strength complicate the problem of extruded into multiple spaces to provide adequate drainage systems.

DESCRIPTION OF THE INVENTION

It is an object of the present invention to provide a drainage system for an extruded window frame jaw that is economical and easy to install.

It is another object of the present invention to provide a drainage system of an extruded window frame jaw configured to have windowsills capable of responding to stringent regulations concerning the penetration of water through wind through closed windows.

According to the present invention there is provided a drainage system for an extruded windowsill having predetermined gaskets in the windowsill and a drainage opening through the outer surface of the windowsill, which is necessary to provide a drainage path from the drain hole in the windowsill surface to the drain hole in the face of the windowsill. In addition, a drain cap is provided that is inserted into the drain confinement formed on the surface of the windowsill. The drain cap covers the drain on the windowsill and forms two separate drains at the bottom of the drain. The drain cap also has a slope that guides the water entering the front part of the windowsill through one drain, while allowing water entering the rear part of the windowsill to drain through the other drain. By guiding the water through separate drains from each part of the windowsill, the wind pressure in the water drained through each drain is reduced and the water drained from one drain is not mixed with the water drained through the other. The likelihood of this intrusion is significantly reduced. The drain cap according to the present invention is provided with elastic locking tabs on both sides to be easily inserted into the drain hole of the windowsill and automatically fixed in the inserted state.

In more detail and according to the first aspect of the present invention, it has a windowsill surface that engages an outer window sills, an inner window sills, a bottom wall and at least one window pane, the windowsill surface allowing the windows to pass through the hollow portion of the windowsill. An extrusion having at least one drain hole laterally spaced so that the at least one drain hole is adjacent to the outer jaw surface than the other drain hole to provide a drain to the surface and at least one drain hole of the outer jaw surface for draining water to the hollow of the windowsill A drain cap for a window sill has a cover portion for covering the drainage port on an outer window sill, wherein the cover portion has a front wall having a front surface, a rear surface, and an outer circumferential protrusion contacting the outer jaw surface, wherein the drain cap is a windowsill. The water drained into the water is guided from the drain hole on the surface of the windowsill near the outer window through the drainage channel of the cover part. The inclined portion fixed to the rear surface of the cover portion, and the cover portion and the ramp portion together for discharging water entering laterally from the drainage hole near the outer window silt and the outer drainage for discharging the water guided by the inclined portion. And an inner drainage channel formed separately from the drain cap, wherein the drain cap has a means for fixing the drain cap to a drainage confinement of the outer windows.

According to another feature of the invention, an extruded windowsill having an outer jaw surface, an inner jaw surface, a bottom wall and a windowsill surface engaging with at least one windowpane is formed by at least two longitudinally extending partitions extending longitudinally within the windowsill. A hollow chamber and formed on the windowsill surface for draining water from the windowsill surface to the hollow chamber of the windowsill, each row having at least one drain hole and laterally spaced closer to the upper edge of the outer jaw surface than the other rows. At least two rows of drainage holes and at least one drain and a horizontal drainage of the windowsill surface having at least one diameter passing through the outer jaw surface and the middle partitions in the windowsill to provide a drainage path from the drain holes of each row of the windowsill surface to the outer jaw surface. It consists of an outer circumferential part in contact with the cover, the rear surface and the outer window sill. A drainage system having a drainage cap providing a drainage channel, the drainage cap having an inclined portion fixed to the rear of the cover portion for guiding water drained into the windowsill through the drainage channel from a drainage hole of the windowsill surface adjacent to the outer window silt, The cover portion and the inclined portion together form two separate drainage passages, an outer drainage for discharging water guided by the inclined portion and an inner drainage passage for discharging water that enters the windowsill through a drain hole away from the windowsill surface. The drain cap is also provided with a drain system, characterized in that it has means for securing the drain cap to the drain hole of the outer jaw face.

According to another feature of the invention, an extruded windowsill having an outer jaw surface, an inner jaw surface, a bottom wall, a windowsill surface engaging with at least one window glass, and at least two hollow chambers extending in a longitudinal direction by a longitudinal partition within the windowsill In order to provide a drainage system for the dragon, at least two rows of drains on the windowsill surface are formed to drain water on the windowsill into the hollow chamber in the windowsill, each row having at least one drain hole and one longitudinal row. Is formed so as to be adjacent to the outer jaw surface than the outer row, and to provide a drainage through the window jaw and the drain holes of the diameter between the predetermined partitions and the outer jaw surface in the windowsill located between the windowsill and the drain of the windowsill surface A method of providing a drainage system for an extruded windowsill comprising forming a drainage opening. And a drainage channel, wherein the water entering the windowsill from the drain hole located near the outer window surface is discharged through the first drain and the water entering the other drain hole is discharged from the windowsill so as to be discharged through the second drainage channel. And providing a second drainage channel, wherein a drain cap having means for guiding water through the first drainage channel is provided at a drainage port of the outer jaw surface.

[Brief Description of Drawings]

The present invention will be described by way of example with reference to the following drawings.

1 is a vertical sectional view of a horizontal sliding window structure configured to have an extruded window frame.

FIG. 2 is an isometric view of one end and part of the jaw surface of the window frame jaw shown in FIG. 1 showing a typical pattern for the distribution of drainage holes on the windowsill surface.

3 is a cross-sectional view of the window frame jaw schematically illustrating the position of a double diameter drill to form a drainage opening of the windowsill.

4 is a front view of the drain cap according to the present invention.

5 is a side view of the drain cap shown in FIG.

6 is a plan view of the drain cap shown in FIG.

7 is a cross-sectional view taken along the line A-A of the drain cap shown in FIG.

8 is an elevational view of a portion of an extruded window frame jaw showing a cutting corner for mitered joints of the windowsill and a drain cap according to the invention installed on the windowsill.

9 is a cross-sectional view of the window frame jaw shown in FIG. 3, in which a drain cap according to the invention is installed in the drain and the drain flow path from the window sills is schematically shown.

10 is a cross-sectional view of another extrusion frame structure showing the location of a drill used to make a drain in the window frame.

11 is a cross-sectional view of the window frame jaw shown in FIG. 7 in which a drain cap according to the present invention is installed in a drain.

12 is a table showing the results of a comparative test of a horizontal sliding window provided with a drainage system and a conventional drainage cap according to the present invention.

Best Mode for Carrying Out the Invention

1 shows a vertical sectional view of the latest horizontal sliding window structure indicated by reference numeral 20, which is a window frame jaw, window frame header 24 and inner window glass 26 indicated by reference numeral 22. ) And an outer window glass 28. State-of-the-art windows also often have a window screen 30 to prevent the ingress of insects and wind debris through the open window. The window screen 30 is supported by the window screen frame 32 held in place by the extruded window screen frame retainer 33 as an integral part of the window frame.

Most window frame jaws require drainage to prevent rainwater and / or condensation from entering the building through the windows. As will be appreciated by those skilled in the art, the general window structure shown in FIG. 1 presents a unique problem in providing adequate drainage of the windowsill. The present invention provides an apparatus and method for draining rainwater and condensate into a multi-space extruded window frame jaw that can be used in the construction of various entities including horizontal sliding windows, vertical sliding windows and other window structures.

2 is a coaxial view of one end of the window frame jaw 22 and a part of the upper surface, and the window frame jaw 22 includes an outer jaw face 34, an inner jaw face 36, an outer jaw face 34, A jaw surface 38 extending between the upper corners of the inner jaw surface 36 and a bottom wall 40 are provided. Jaw surface 38 has two jaw tracks 42 and 44. In the jaws of this embodiment, the tracks 42 and 44 are parallel side caps that accommodate various different track attachments to accommodate various types of horizontal and / or vertical sliding panes. The jaw surface 38 can likewise be a continuous wall similar in construction to the bottom wall 40.

Jaw surface 38 should be provided with a drain to prevent rainwater or condensation from accumulating on the windowsill. 2 shows a typical drainage configuration for this kind of windowsill. This drainage arrangement comprises a window screen frame retainer drain hole 46 of the jaw surface of the window screen frame retainer 33, an outer jaw track drain hole 48, and two inner jaw track drain holes 50 and 52. do. The pattern of the drain holes is usually repeated at least twice more along the entire length of the windowsill depending on the window size. As can be seen these drainage holes in the window sills 38 allow water to enter the hollow chamber of the window frame jaw extruded to have multiple spaces. Therefore, in order to drain the water entering the windowsill frame to the outside of the windowsill, a drainage channel should be provided.

3 illustrates one method of providing a drainage path through the chamber of the windowsill frame 22 to allow water to drain in from the windowsill surface. Due to this unique configuration of the windowsill extrusion structure, one double diameter drill bit 53 may be used to form a drainage through the partition of the windowsill extrusion structure. Drilling operations are conveniently and most accurately carried out in the drilling machine, and various models are known. A double diameter drill bit 53, also known as a hole, is drilled in the outer jaw surface 34. The first portion or the small diameter portion of the drill bit 53 is appropriately sized to form a hole through a partition in the chamber below the inner jaw track 44. The second or large diameter portion of the drill bit 53 is sized to drill the bottom wall of the chamber below the window screen frame retainer 33 and the chamber below the outer jaw track 42. You can see that some of these holes are spaced along the entire vagina. These holes are positioned to coincide with the respective drainage pattern on the jaw surface 38 for rapid machining. In practice, however, it is desirable to shift the drains for each drain hole pattern on the jaw surface because this prevents strong winds from entering through the windowsill. Nevertheless, the effect of the invention does not depend on the location of the drains and other spacings may be used.

The drain, traditionally provided by the drain of the jaw face 34, is masked by a drain cap that may have a net or screen to prevent insects and other debris from entering the windowsill. However, extensive experiments have shown that conventional standard drainage caps do not always meet building code specifications, including strict regulations that specify the ingress of moisture blown through the closed window. To avoid this problem, a new drain cap was invented. This drain cap is shown in FIGS. 4-7, where FIG. 4 is a front view of a preferred embodiment of the drain cap, FIG. 5 is a side view, FIG. 6 is a top view, and FIG. 7 is a vertical view taken along line AA of FIG. It is a cross section. This drain cap is indicated at 54. The drain cap includes a cover portion 56 having an outer surface 58, an inner surface 60 (FIG. 7), and an outer circumferential protrusion 62 (FIG. 6). As can be seen in FIG. 7, the inclined portion 64 of the drain cap is generally L-shaped in the centerline cross section. Both sides of the inclined portion are attached to the inner surface 60 of the cover portion 56 (FIG. 6). Since the cover portion 56 has a lateral edge extending to the rear of the bottom leg of the L-shaped inclined portion 64, as shown in FIG. Provide independent drainage. Thus, as shown in cross section in FIG. 7, the drain cap according to the present invention provides an inner drain 66 and an outer drain 68. The inner drainage path 66 drains water from the inner tuck tracks 44, while the outer drainage path 68 drains water from the outer tuck tracks 42 and the window screen frame retainer 33. The outer drainage 68 is also protected by a grid or net 70 to prevent insects and other debris from blowing into the window jaw through the outer drainage 68 due to its width.

In order to easily and simply install the drain cap 54 in the drain on the outer surface of the window frame jaw, an elastic locking tab 65 (FIG. 6) fixed to both edges of the inner surface 60 of the drain cap is provided. Is provided. The locking tab 65 has a tapered end for easily entering the drainage confinement when the drainage cap is pressurized into the drainage confinement and a rectangular slot engaging with both sides of the drainage confinement. This locking tab 65 allows the drain cap 54 to be automatically fixed in a hole of the appropriate size when the drain cap is pressed into the drain confinement.

8 shows a portion of the window frame jaw 22 having a miter cut at the right end and a drain cap 54 installed adjacent the right end. It is preferable that all the drain holes are formed in the jaw surface 38 and all the drain holes are formed in the outer jaw surface 34 before the window frame jaw 22 is welded to the jam to construct the window frame.

9 is a cross-sectional view of the window frame jaw 22 of FIG. 3 in which the drain cap according to the present invention is installed in the drain port 67 of the outer jaw surface 34. 9 also schematically shows the flow path of rainwater and condensate drained into the hollow chamber of the windowsill 22. As can be seen, the water drained through the drain holes 46 and 48 respectively positioned in the window screen frame 33 and the outer jaw track 42 is the window screen frame retainer 33 and the outer jaw track 42. It is drained through the large diameter drain hole 67 of the bottom wall and the outer jaw wall of the lower chamber. Therefore, all the water drained through the jaw surface adjacent the outer jaw surface 34 is guided through the outer drainage channel 68 by the inclined portion 64 of the drain cap 54. On the other hand, the water drained through the drain holes 50 and 52 and the inner jaw track 44 flows through the small diameter drain water 69 sandwiched therebetween and is discharged through the inner drain passage 66. Similarly, the air pressure applied to the window structure by the wind is divided through the inner drain 66 and the outer drain 68. This drainage provides a beneficial effect of dividing the water flow from each part of the windowsill such that there is no intermixing of water drained through the inside of the jaw surface with water drained through the front of the windowsill. Splitting the drainage in this way helps prevent large amounts of water from entering the inner walls of the building by strong winds. In addition, dividing the drain into two independent drains reduces the air inlet, reducing the air pressure inside the windowsill. As determined by the experiment, the effect of this drainage system will be explained in more detail with reference to FIG.

10 shows another window frame jaw, indicated at 72. This window frame jaw is similar to that shown in FIGS. 2 and 9 except that the inner jaw track 44 and the outer jaw track 42 are located on a common surface. The drain hole on the surface of the jaw is preferably formed in the same pattern as shown in FIG. However, it should be understood that various other patterns may likewise be used successfully. Providing the horizontal drainage of this windowsill is more complicated and easier to achieve than shown in FIG. However, when the boring machine is used, the drainage path is easily formed by three boring operations. A first square shoulder bit 74 is used to form a large diameter hole through the outer jaw surface 34 of the window frame jaw 72. A small diameter bat 76 is then used to drill the drain port 71 directly above the bottom wall of the chamber below the outer jaw track 42 and the drain port 73 directly below. These two drilling operations provide a drainage path through which water can enter the jaw surface from the inner jaw track 44. As can be seen in FIG. 11, the water entering the jaw adjacent to the outer jaw surface 34 is guided by the inclined portion of the drain cap 54 to pass through the outer drainage channel 68 while the water entering the jaw of the portion of the inner jaw is Since the water is drained through the inner drain 66 provided by the drain cap 54, the above-described beneficial effect can be obtained.

Although the present invention described so far has been described only in relation to two window frame jaw structures, those skilled in the art will appreciate that the techniques of the present invention can be readily applied to a window frame jaw structure extruded to have any multiple chambers.

As shown in FIG. 12, the waterproof test performed on the horizontal sliding window proves the effect of the technique of the present invention. This test was conducted using horizontal sliding windows because these windows are the most susceptible to intrusion of moisture from the wind. All tests were carried out using the windowsills of the type shown in Figures 3 and 9, since this type of jaw is one of the most difficult to drain according to building code. These windowsills were tested in a controlled laboratory in accordance with the International Testing Standard, or Canadian Standard Association (CAS-440, National Window Standard), which standard was selected from Table 2 of ASTM S.11.3.2. The test specifies that the test should be conducted in accordance with ASTM standard E547). 34L / on window according to this regulation Minutes (5 OU, S, Gal. f ² ), while the input difference through the window of 150 to 300 Pa is applied in 4 cycles, each cycle is pressurized for 5 minutes and deactivated for 1 minute, during which water is continuously applied. This window was also tested with and without insect screens.

As can be seen in FIG. 12, windows with insect screens are generally better in waterproof testing because insect screens change the flow of water from the jaw and also reduce the water pressure and / or wind pressure in the drain hole on the jaw surface. to be. Three windows were tested as shown in FIG. The number of drainage holes on the jaw surface of each window is different. Column 1 and column 2 show the comparison of the window with the insect screen. Column 1 represents a window with an improved drainage system according to the invention and column 2 represents a window with a conventional drainage system. Columns 3 and 4 show the results of the window tested without insect screens. Column 3 represents the result of a window with an improved drainage system according to the invention while column 4 represents a window with a conventional drainage system.

The window cross section below the table in FIG. 12 represents the actual level of the inner jaw track of the window during each test. Although the water level of the inner jaw track is quite high in the city of A through E, water has not passed through the jaws and windows of A through E and thus has passed the immersion test. However, the figures A-1 to E-1 did not pass the immersion test because water penetrated through the windowsill and the window even when very small water exists in the inner jaw track. Figures A-1 through E-1 are for illustration only and are not intended to show the actual movement of water through the windowsill. As can be seen from the table, the window provided with the insect prevention screen and the improved drainage system according to the present invention has passed the submersion test. However, windows with insect screens and conventional drainage systems have not passed testing at high wind pressures. For example, Window # 1 with insect screens and conventional drainage systems failed at a pressure of 300 Pa (and above). Window # 2 with insect screen and conventional drainage system also failed at water resistance at 300 Pa. Window # 3 with the same screen and drainage system failed at 200 Pa and 300 Pa.

Since the drainage system of windows without insect screens encounters a lot of water, it is not easy to shut off the water at high pressure. As can be seen from column 3 and column 4 of the table of FIG. 12, the drainage system according to the present invention maintained a lower water level in the inner jaw track than the conventional drainage system. However, no system passed the 300 Pa pressure test. In window # 2 the two tests for the improved drainage system according to the invention were successful while the two tests for windows with conventional drainage systems were unsuccessful. In the tests conducted on window # 3, all three tests on the window with the improved drainage system according to the invention were successful. However, the conventional drainage system failed at 300 Pa.

[Industrial availability]

It can be seen from the above description that the improved drainage system according to the present invention improves the drainage of the storm rainfall at the extrusion windowsill.

Therefore, a drain cap is provided and a method of installing a drain cap useful for draining water from the extrusion windows of multiple chambers of the type generally made of an extruded thermoplastic or light metal alloy is provided. The drainage system is particularly suitable for windows constructed for residential structures or for retrotit markets, but can also be used for certain commercial and industrial window systems. The drainage system can also be advantageously applied to any multi-chamber windowsill associated with movable window glass. Various modifications and variations of the embodiments described so far may be made without departing from the scope of the invention as defined by the appended claims.

Claims (8)

It has a sill surface 38 that engages an outer sill surface 34, an inner sill surface 36, a bottom wall 40, and at least one pane 26, 28, wherein the sill surface 38 has water windowsill. At least two drain holes 46 laterally spaced apart so that at least one drain hole 46 is closer to the outer jaw surface 34 than the other drain holes 52 to provide a drain for the window surface 38 through the hollow portion of The drainage cap 54 for the extruded windowsill 22,72 having the 48,50,52 and at least one drainage opening 67 of the outer jaw surface for draining water to the hollow of the windowsill, the outer window sills 34 Has a cover portion 56 for covering a drain 67 thereof, the cover portion 56 having a front surface 58, a rear surface 60, and an outer circumferential protrusion 62 in contact with the outer jaw surface 34. In the drain cap having a front wall, the drain cap 34 enlarges the water drained into the windowsill from the drain holes 46 and 48 of the windowsill surface near the outer windowsill 34. The inclined portion 64 is fixed to the rear surface of the cover portion 56 for guiding through the discharge path 68 of the portion, and the cover portion 56 and the lamp portion 64 together are guided by the inclined portion. An inner drain 66 formed separately from the outer drain 68 to discharge the water entering laterally from the outer drain 68 and the drain holes 46 and 48 near the outer window silt, Cap 34 is a drainage cap for extruded windowsill, characterized in that it has a means for fixing the drainage cap in the drainage port 67 of the outer sill surface 34. 2. The locking tab according to claim 1, wherein the means for securing the drain cap (54) into the drain hole (67) of the outer jaw surface (34) is fixed to both sides of the inner surface of the cover portion (56) of the drain cap (54). And a locking tab 65 extending rearward of the lateral edge of the cover portion 56 and having a tapered end for easy entry into the drain port 67 and having a notch adjacent the lateral edge of the cover portion 56. When the drain cap 65 is pressurized into the drain port 67, the tab 65 slides both edges of the drain port 67 into the notch and the tab 65 protrudes to drain the drain cap 54. (67) The drainage cap for extruded windowsill, characterized in that it is bent in the side until it is fixed in the. The inclined portion 64 according to claim 1 or 2, wherein the inclined portion 64 has an L-shaped thin body at a central longitudinal section and an upright side both edges forming a drainage passage for guiding water drained from the windowsill 20. And a short leg spaced apart in parallel to the rear surface 60 of the bottom of the cover portion 56 and having a partition for separating into two drainage channels 66 and 68. Drain cap for extruded windowsill. The extrusion windowsill as claimed in claim 1, wherein the drain cap 54 also has a grid or net 70 covering the bottom of the inner drain 66 or the outer drain 68. Drain cap. Longitudinal partitions in the outer jaw surface 34, the inner jaw surface 36, the bottom wall 40, the window surface 38 engaging the at least one pane 26, 28, and the window sills 22, 72. At least two hollow chambers extending in the direction, at least two rows of drains 46,48 of the windowsill surface 38 for draining water on the windowsill surface 38 into the hollow chambers in the windowsills 22,72. Each row has at least one drain hole (46, 48, 50, 52) and one longitudinal row is located closer to the outer jaw surface 34 than the outer row, and the windows 22, At least one diameter penetrating certain ledges in the windowsill and the outside jaw surface 34 located between the windowsill surface 34 and the drainage openings 46,48,50,52 of the windowsill surface to provide a drainage through 72. A method of providing a drainage system for extruded windowsills 22 and 72 having drainage outlets 67 of the present invention, the drainage openings 67 covering and providing drainage passages, Water coming into the windowsill from the drainage holes 46 and 48 located near the outer window surface 34 is discharged through the first drainage passage 68 and water flowing from the other drainage holes 50 and 52 passes through the second drainage passage 66. A drain cap having means for guiding the water through the first drain channel 68 and providing first and second drain channels 66 and 68 for discharging water through the windowsills 22 and 72; 54) is provided at the drainage port (67) of the outer jaw surface (34). 6. A method according to claim 5, wherein said drain (67) is formed as a horizontal boring machine. 7. The drainage passage (68) according to claim 5 or 6, wherein the drain hole penetrates the longitudinal barrier in the outer jaw surface 34 and the windows 22 and runs through the drain holes 46 and 48 located near the outer jaw surface 34. Is formed concentrically with the first hole 67 through the large diameter hole 67 of the first diameter providing the c) and the other longitudinal diaphragm providing the drainage path 66 from the other drain holes 50,52. A method of providing a drainage system for an extruded windowsill, characterized in that it consists of a small hole (69) of a second diameter. 7. The outer jaw surface 34 and the windowsill 72 according to claim 5 or 6, wherein the drain opening 67 provides a drainage passage 68 from the drain openings 50 and 52 located near the outer jaw surface 34. The large diameter 67 of the first diameter penetrates the longitudinal diaphragm in the diaphragm and is disposed around the large diaphragm 67 through the other diaphragm to provide a drainage passage 66 from the other drainage ports 50 and 52. A method of providing a drainage system for an extruded windowsill, characterized in that it comprises at least one small hole (71,73) of a second diameter but not concentric with the large hole.