US 3638372 A
A window sash rebate profile adapted to be made from plastic material and comprising a longitudinal condensate eduction channel having parallel sidewalls supporting the window rim sash the channel bottom being continued outwardly from the channel from wall into a window frame cover plate, a condensate reception gutter being attached to the outer side of the channel backwall at a short distance below the rim sash bottom, slit-shaped apertures through said backwall just above the bottom of said gutter leading into the said channel and similar openings through the channel front wall leading to the outside above the said cover plate.
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Description (OCR text may contain errors)
United States Patent Rosenthal Feb. 1, 1972 GUTTER  Inventor: Carl Rosenthal, Willem de Zwijgerplantsoen 3, Utrecht, Netherlands  Filed: July 2,1969
 Appl.No.: 838,432
 U.S.Cl ..52/97,52/209,49/476  lnt.Cl ..E06b7/l4  FieldotSearch ..52/97,209,172,17l,232, 52/11; 49/408, 471, 476
 References Cited UNITED STATES PATENTS 1,857,883 5/1932 Sjolander ..52/232X 1,894,529 1/1933 Anderson ..52/209X 2,787,034 4/1957 l-lauck ..52/209 2,791,011 5/1957 Heep ..52/209 3,221,453 12/1965 Lietaert ..52/209 FOREIGN PATENTS OR APPLICATIONS 326,006 2/1903 France ..52/209 1,11 1,798 7/1961 Germany ..52/209 716,833 10/1954 Great Britain ..52/209 1,086,087 10/ 1967 Great Britain ..52/97 Primary Examiner-Alfred C. Perham Att0rney--Woodhams, Blanchard and Flynn  ABSTRACT A window sash rebate profile adapted to be made from plastic material and comprising a longitudinal condensate eduction channel having parallel sidewalls supporting the window rim sash the channel bottom being continued outwardly from the channel from wall into a window frame cover plate, a condensate reception gutter being attached to the outer side of the channel backwall at a short distance below the rim sash bottom, slit-shaped apertures through said backwall just above the bottom of said gutter leading into the said channel and similar openings through the channel front wall leading to the outside above the said cover plate.
5 Claims, 2 Drawing Figures PATENTED FEB i972 ATTORN EYS WINDOW SASH REBATE PROFILE WITH A CONDENSATE RECEPTION GUTTER The invention relates to a window sash rebate profile with a condensate reception gutter behind and with a condensate eduction channel under the window rim sash, the wall of the latter channel having a closed cross section but provided with transverse apertures to the reception gutter and to the exteri- It is a main object of the invention to give a shape to such a profile by which it can be made from artificial resin, more especially as a profile manufactured by extrusion of thermoplastic material, in order to obtain the advantages of this material compared with the conventional aluminum profiles. These advantages bear for a great part upon the heat-insulating properties of plastics as it has been found that the great troubles caused by rot in the window frames are mainly caused by moisture which condensates on the faces of aluminum profiles which are in contact with window frame parts. Even intense maintenance operations at regular intervals and especially very accurate painting could not eliminate these drawbacks, but moreover in the practice one cannot rely upon regularity and accuracy with which such maintenance service should be executed.
It is a further object of the invention to obtain a solid watertight connection between the sash rebate part and a protective piate for the outer window frame which may be formed in one piece with the profile. Another object of the invention is to obtain a shape of sufficient strength to bear the window without danger of deformation of the plastic material and of the discharge apertures even when the latter are shaped as rather long slits.
In relation thereto it is another object of the invention to meet the difficulty that the condensate may freeze in the eduction apertures and channels, by whichin known constructions the reception gutter for the condensate flows over with all inconveniences connected therewith.
The invention and details to be applied in connection therewith are defined in the added claims and clarified in the description with reference to the drawing in which an embodiment is represented.
FIG. 1 represents diagrammatically a cross section and FIG. 2 is a perspective view of a detail.
The sash rebate profile l for the glazing depicted in FIG. 1 is entirely made of plastic e.g., polyvinylchloride. The window frame is indicated by 2, the inner threshold by 3 and an outer threshold by 4. The lower rim of a glasspane 5 is disposed in the channel-shaped sash rebate 6 proper. Although plastic material is applied still a sufficient portative force is obtained because the front wall 7 and the backwall 8 of the channel 6 run downwardly as to parallel walls on to the supporting crosswall 25 which is at the same time the bottom of an eduction channel 12. The upper wall 24 of the latter shapes another crosswall between the vertical walls 7 and 8 and is at the same time the bottom wall of the sash rebate 6.
The bottom wall 25 of the eduction channel 12 is continued outwardly into a cover plate 9 for the window frame threshold 4. The leg 8 is glued to the inner threshold 3 and the cover plate 9 to the threshold 4 in a manner which will be described in detail later on.
The reception gutter 11 for the condensate is attached to the wall 8 just below the sash bottom 24 so that discharge apertures 13, indicated by arrows in FIG. 1 can be provided leading from the bottom of the reception gutter 11 into the channel 12. The latter has a closed substantially rectangular cross section and discharge apertures indicated by the arrow 14 lead from the channel 12 to the exterior.
From the perspective representation in FIG. 2 it can be seen that the discharge apertures 14 are staggered with respect to the discharge apertures 13; in the figure the section runs through an aperture 13, so that a direct passage of draft is prevented.
In the construction according to the invention the apertures like 13 and 14 have the shape of longitudinal slits, whereby the the outlet of water is enlarged and the risk of freezing is reduced. This risk is further reduced on account of the large dimensions of the channel 12. Further the elongation of the holes 13, 14 makes it easy to obliquely insert a pin from the inner side through both the slits l3 and 14 in order to clean the apertures and the channel 12.
As the channel 12 has the shape of a channel with its longer sides upstanding there is sufficient space to provide a draft preventer strip or shelve 15 extending from the backwall 8 of the channel 12 between the transverse discharge apertures 13 in this wall and the discharge apertures 14 in the front wall 7 of the channel 12. The draft preventer strip 15 is downwardly inclined from its edge of attachment toward its free end edge. The direction of a current of air penetrating through the slits 14 is thereby changed and its vigor is weakened. It appears that in this way troublesome draft and penetration of rain through the discharge slits 13 are completely prevented, whereas the condensate can freely flow off toward the exteri- An inwardly inclining marginal strip 16 as indicated by dash lines in FIG. 1 may be provided on the turned up edge of the reception gutter 11 contributing to guiding penetrated external air upwards along the glass pane 5 when there is a strong wind. To a considerable extent the gutter 11 is thereby also prevented from becoming filthy.
The present profile has a sufficient constructional strength to be made of plastic material and thus the profile can be manufactured by extrusion of thermoplastics. Thereby important advantages can be obtained with respect to metal profiles, like aluminium profiles.
Such known metal profiles owing to the highthermal conductivity practically take the temperature of the open, whereby important differences of temperature arise between the wood of the window frame and the portions of the profile which are in contact with the wood. As a consequence water from the wood condenses, e.g., under the bottom of the gutter 11, that is at a location which is not accessible for maintenance operations and there a process of decay will start. Also condensate will form on the free outer side of the gutter 11 and this condensate caused a continuous moistness in the area where the outer side is bearing on the threshold 3. Analogous symptoms occurred at the outer threshold. A drawback of the conventional aluminium profiles is further that ice forms swift thereon. Water between the profile and the wood will freeze again and again. Progressive damage and decay are caused on account of the dilation.
The thermal conductivity of plastic material as is preferably used according to the invention, e.g., polyvinylchloride, differs little from the thermal conductivity of wood, so that the drawbacks described hereinbefore which in practice give rise to great economic loses are entirely eliminated. It has been found that condensate practically no longer freezes, not at least at locations which cause danger for the corrosion of the wooden thresholds.
It is therefore entirely within the scope of the invention to complete the results thereof by avoiding, too, moisture on the upper side of a wooden window frame, for which purpose the outer threshold 4 is entirely covered by the profiled plate 9. This plate 9 bears by downwardly protruding ribs, like 17, 18 and 19. Two of them, 18 and 19, which are situated in the central area, have a turned over edge 20 resp. 21 shaping an enlarged supporting foot. The closure on the outer edge of the threshold 4 is ensured by a downwardly turned over marginal strip 22, protruding beyond a rib 23. The latter projects perpendicularly from the marginal strip 22 and bears against the outer edge of the threshold 4. The lower faces of the window frame cover 9 and of the channel bottom 25 are glued to the corresponding surfaces of the window frame.
In order to obtain a perfectly adjoining glue surface even when irregularities in the window frame surface occur, while maintaining a perfectly smooth upper surface of the cover plate 9, the underneath space of the cover plate comprising the ribs l7, l8, l9 and 23 is provided with a layer of porous material 26 (FIG. 1) such as foam plastic with a closed cell structure, like polyurethane foam. A glue layer may be provided upon the lower side of the foam plastic filling, but instead thereof glueing properties may be given to the foam plastic filling itself.
By this means at the same time an excellent closure is obtained in the corner joints, where the ends of the cover plate 9 meet the uprights of the window frame.
It is obvious that for sash rebate profiles according to the invention no screws or like fastening means need be used, so that the risk of penetration of water and corrosion of wood connected with such means can be avoided.
The risk of fracture of the glass pane is also reduced when plastic profiles and foam plastic are used as elastical materials since a certain flexibility is obtained.
Thanks to these properties the profile can even be brought under a window pane in the position shown in HO. 1 if a round shape is given to the corner where the walls and 8 meet.
Under special circumstances like application in regions where very low temperature below zero and strong wind pressures prevail an additional measure can be advantageously used, viz the provision of an antifreeze compound in the discharge path of the condensate. The channel 12 is well adapted for receiving a filling consisting of granulated antifreeze compound at least in the area where the apertures 13 open into the channel, the compound dissolving sufficiently on getting into contact with water to thereby prevent the water from freezing. When there is a sufficiently coarse granularity a large quantity of the agent may be accommodated in the channel 12 without same being obstructed for the passage of water. Since the process of dissolution is only gradually effected and only in periods wherein condensate passes this stock will last long. Replenishment can also take place, however, through the slits 13 and 14.
1. A one-piece windowsill cover member adapted to be positioned on a conventional windowsill, comprising a pair of laterally spaced vertically directed sidewalls extending in the longitudinal direction of said cover member, a first crosswall extending between and fixedly connected to said sidewalls at a vertical location between the upper and lower ends thereof whereby said first crosswall and the upper portions of said sidewalls define an upwardly opening channel for receiving therein the lower edge of a panel, a second crosswall disposed below said first crosswall and extending between and fixedly connected to said sidewalls substantially adjacent the lower ends thereof, whereby said first and second crosswalls and the lower portions of said sidewalls define a closed channel extending longitudinally of said cover member, said second crosswall extending laterally outwardly a substantial distance beyond one of said sidewalls to form a cover plate adapted to totally cover said windowsill, wall means fixedly secured to and extending laterally outwardly from the other sidewall for defining a condensate receiving gutter which extends longitudinally of said cover member, said wall means including a vertical flange laterally spaced from said other sidewall on the side thereon opposite from said one sidewall and a third crosswall extending between and fixedly connected to said vertical flange and said other sidewall, said third crosswall being fixedly connected to said other sidewall at an elevation above said second crosswall and slightly below said first crosswall, said one sidewall have a first aperture extending therethrough directly above said second crosswall for providing communication between said closed channel and an exterior location directly over said cover plate, said other sidewall having a second aperture therethrough for providing communication between said gutter and said closed channel, said second aperture extending through said other sidewall at a location directly below said first crosswall whereby said first and second apertures are substantially vertically spaced from one another, and a deflector member fixedly secured to said other sidewall directly below said second aperture and extending inwardly into sat closed channel from its point of attachment to said other sidewall for restricting the inflow of air from said first aperture to said second aperture, the free edge of said deflector member being disposed closely adjacent but slightly spaced from said one sidewall and positioned at an elevation above said first aperture.
2. A cover member according to claim 1, wherein said deflector member extends inwardly and downwardly into said closed channel from its point of attachment to said other sidewall with the free edge of said deflector member being positioned at an elevation slightly above said first aperture.
3. A cover member according to claim 1, wherein said cover member is formed from plastics material.
4. A cover member according to claim 1, wherein a downwardly directed flange is fixedly secured to and extends longitudinally along the outer free edge of said cover plate, said flange being adapted to overlap the front edge of the windowsill.
5. A cover member according to claim 1, wherein a plurality of longitudinally extending, downwardly directing ribs are fixedly secured to the lower surface of said cover plate for permitting said cover plate to be spaced upwardly a small distance from said windowsill, and means disposed under said cover plate within the space between said ribs for permitting said cover plate to be selectively positioned on said windowsill, said last-mentioned means comprising a layer of porous plastic material.