Static structures (e.g. – buildings) – Specified terranean relationship – With drain or vent exterior to foundation perimeter
Reexamination Certificate
2000-06-14
2001-08-28
Kent, Christopher T. (Department: 3635)
Static structures (e.g., buildings)
Specified terranean relationship
With drain or vent exterior to foundation perimeter
C052S169140, C052S741300, C405S043000
Reexamination Certificate
active
06279275
ABSTRACT:
BACKGROUND OF THE INVENTION
Waterproofing coatings are frequently applied to the outer surface of concrete foundation walls to prevent water penetration through the wall. An extremely effective waterproofing coating is that described in U.S. Pat. No. 5,352,531. The coating of that patent is a highly adhesive, elastomeric type which is asphalt free and is non-hazardous and non-toxic when cured. The coating when applied to a foundation wall provides an adhesive, water impervious membrane that prevents penetration of water through the wall, even when the wall is subjected to substantial hydrostatic pressure.
To prevent damage to the elastomeric coating when the wall is back-filled through the use of mechanical handling equipment, it has been the practice to apply protection board over the elastomeric coating. A common type of protection board, as used in the past, is polystyrene foam board. The polystyrene board aids in protecting the elastomeric coating and has some insulating value. However, the polystyrene foam can be fractured by back-filling and is not waterproof. Over time the polystyrene foam will absorb water, and in itself does not constitute a waterproofing membrane.
U.S. Pat. No. 5,857,297 describes an improved waterproofing system for a backfilled foundation wall, in which an extruded, rigid, thermoplastic protection board is applied over the elastomeric coating on the foundation wall. The protection board, as described in U.S. Pat. No. 5,857,297, includes an inner face which is bonded to the elastomeric coating and a parallel outer face. A plurality of spaced ribs interconnect the two faces and define a plurality of vertical flow channels which extend the entire height of the board. A series of openings, slots or holes are formed in the outer face of the board and communicate with the flow channels. Water from the soil can enter the openings and flow downwardly through the flow channels to the drain tile, thus draining the water as well as relieving hydraulic pressure against the wall.
With the waterproofing system as described in U.S. Pat. No. 5,857,297, the elastomeric coating applied to the foundation wall is extremely tacky or adhesive and if the protection boards are not properly aligned in side-by-side relation, it is very difficult to remove or shift the boards. When this happens, it is necessary to seal the joints between adjacent vertical edges of the boards by caulking or sealing tape, or re-cut new boards for proper alignment. This manual joint sealing or re-cutting operation requires considerable time and labor.
SUMMARY OF THE INVENTION
The invention is directed to an improved water impervious panel assembly for a foundation wall, and in particular to a novel waterproof joint construction between side edges of adjacent panels that eliminates manual sealing of the joints. The panels are preferably formed of extruded thermoplastic material and are secured in side-by-side relation to the outer surface of the foundation wall. Each panel includes an inner face which bears against the foundation wall and a parallel outer face. A series of spaced ribs interconnect the two faces and define a plurality of vertical flow channels which extend the entire height of the panel. Drain holes are formed in the outer face of each panel and provide communication with the flow channels. With this construction ground water will flow through the drain holes into the channels and then downwardly through the channels to the drain tile. To provide a waterproof joint between side edges of adjacent panels, the inner face of each panel adjacent one vertical side edge is provided with a vertical slot that communicates with a flow channel located adjacent that side edge. Similarly, the outer face of each panel adjacent the opposite vertical side edge is provided with a second vertical slot that communicates with a flow channel located adjacent the second side edge. Both slots extend the entire height of the panel.
With this construction, a rib bordering the first side edge of one panel is received within a slot adjacent the second side edge of an adjacent panel to provide an interlocking joint between the side edges of adjacent panels that is waterproof and requires no auxiliary sealing materials.
As the construction of the invention provides a positive mechanical interlock, as well as a seal between the adjacent side edges of the panels, proper side-by-side alignment of the panels is assured.
The waterproofing system of the invention does not require the use of a continuous elastomeric or asphalt coating on the foundation wall, as used in the past. By eliminating the use of the elastomeric or asphalt coating, the invention also eliminates the need for a solvent spray system which is used to apply such coating.
Other objects and advantages will appear in the course of the following description.
REFERENCES:
patent: 4943185 (1990-07-01), McGuckin et al.
patent: 5534303 (1996-07-01), Roberts et al.
patent: 5692348 (1997-12-01), Ambrosino
patent: 5857297 (1999-01-01), Sawyer
patent: 5899031 (1999-05-01), Nagaoka et al.
patent: 5930960 (1999-08-01), Konnerth
Andrus Sceales, Starke & Sawall
Kent Christopher T.
Thissell Jennifer I.
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