CA1076920A - Basement sump construction - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE

A basement sump construction characterized by a sump chamber indlucing a side wall provided with a drain outlet opening. A trap apparatus for the unidirectional flow of water is removably mounted on the sump side wall so as to be easily accessible cleaning and servicing through a top access opening in the sump.

Description

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Backg~ound of the Invention This invention relates generally to basement sump constructions and mGre particularly to a device of this character which is provided with a trap for the prevention of back flow of flood water.
Problems_in the Art In the construction of sumps for basements a problem has been preænt in the art in that bac~-flow preventing traps for flood prevention have always tend3d to clog and become inoperative so as to be useless at the time flo~ding c~ndltions occur. Moreover, such prior trap constructions have generally been inaccessibly mounted in drain pipas beneath concrete slab floors whereby their cleaning or replacement has heretofore been extr~mely difficult and exFensive.
Summary of the Invention The invention is a basement sump construction comprising, in aombination, a sump cham~er including a top access opening, a sump side wall provided with an innar wall surface and a drain outlet opening; a trap frame plate mLunted on said inner wall surface and including a plate side facing said dr~ n outlet opening and a trap opening comm~nicating with said drain outlet opening; a trap door pivotally mounted to said frame plate above said trap oFenLng for unid~rectional opem ng mDvement tcwards said drain outlet opening responsive to pressure exerted on said door when water is present in said sump chamber, said door being normally disposed in a alosed position covering said trap opaning; and mounting means acaessible through said top access opening and removably securing said trap frame plate to said sump side wall.
Further cbjects and advantages of the present invention will ba apparent from the following description, reference being had to the accompanying drawings wherein a preferred form of ~,

- 2 - embodiment of the invention is clearly shown.
B~IEF: DESCRIPTION OF THE DRAWINGS
Fig. 1 ~s a partial top elevational view of a sump const:ructed in accordance with the present invention;
Fig. 2 is a side sectional view taken along line 2--2 of Fig. l; and Fig. 3 is a front elevational view of the sump constrNction of the present invention.

DE~SCRIP~ION OF THE PREFE~æD EMBOM~IENT
Referring in detail to the drawings, Fig. 1 illustrates a basement sump constructed in accordance with the present invention which includes a sump chamber 8 formed by poured concrete side walls 14 and 16 and a bottom wall 12, said walls -being positioned beIow a basement floor 20.
Side walls 14 includes a drain outlet opening 31 that communicates with a sewer tile 44 and such opening is provided with a removable trap assembly indicated generally at 15.
Such trap assembly 15 comprises a frame plate 2Z
including an outlet opening 40 with such plate being removably mounted on side wall surface 18 by bolts imbëdded in the concrete and nuts 28.
A gasket or suitable sealing mastic 24 is disposed between frame plate 22 and side wall surface 18.
The trap mechanism further includes a door assembly indicated generally at 35 which consists of a main door plate 3a mounted to the outer surface of frame plate 22 by a hinge 42 with such ~nge being secured to the frame ~ate by bolts and nuts 46 - 48 and to door plate 30 by cap screws ~7.
Door assembly 35 is further provided with a flexible seal 3Z, formed of synthetic rubber or the like which is sandwiched between floor plate 30 and a seal retainer plate 34 with such`plates being joined together by bolt and nut 36 - 38.

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-3- In ~eration, the sump is normally drained by water passing from chamber 8 to tile 44 since the trap door assembly 35 is free to open outwardly. When sump chamber 8 is empty the action of gravity will maintain door assembly 35 normally closed such that any flood water that may occur in the surround-ing earth fill will exert pressure ~ainst the outer surface of the door and thereby urge it in a sealed closed position.
In the event that door assembly 35 should become clogged open it can readily be cleaned via the top opening of the sump chamber 8.
Moreover, the entire trap assembly 15 can be easily removed from the sump merely by loosening the nuts 28 whereby the assembly can be easily repaired or replaced.
While the form of embodiment of the present invention as herein disclosed constitutes a preferred form, it is to be understood that other forms might be adopted.

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Claims (3)

-4- The embodiment of the invention in which an exclusive property or privilege is claimed is defined as follows:

1. A basement sump construction comrpising, in combination, a sump chamber including a top access opening, a sump side wall provided with an inner wall surface and a drain outlet opening; a trap frame plate mounted on said inner wall surface and including a plate side facing said drain outlet opening and a trap opening communicating with said drain outlet opening; a trap door pivotally mounted to said frame plate above said trap opening for unidirectional opening movement towards said drain outlet opening responsive to pressure exerted on said door when water is present in said sump chamber, said door being normally disposed in a closed position covering said trap opening; and mounting means accessible through said top access opening and removably securing said trap frame plate to said sump side wall.

2. The apparatus defined in Claim 1 that includes a resilient seal between said trap door and said trap frame plate.

3. The apparatus defined in Claim 1 that includes a gasket mounted between said trap frame plate and said sump side wall.