Abstract A device for preventing floating of swimming pools by allowing ground water to enter the pool when the pressure thereof is greater than the pressure in the pool includes a conical member tapering upwardly set in the bottom wall of the pool and ending a slight distance below the upper face of the finished pool bottom. Above this conical member and having its upper edge flush with the finished bottom is a check valve arrangement which includes a ring set in the concrete and having an upwardly tapering portion which ends in a very thin upper edge flush with the upper face of the concrete and having a plug portion which is hollow and likewise has a very thin upper edge. These two parts have opposed seats which can engage an O-ring. The hollow plug is filled with concrete which is the same as that used in finishing the bottom of the pool so that the device is only slightly noticeable. If ground water is present at a pressure greater than that of the water pressure in the pool, it will move upwardly through the cone and lift the plug valve so as to enter the pool.
A check valve arrangement for installation in the bottom of swimming pools comprising an annular member having an upwardly extending part with a thin upper edge and having an upwardly directed seating surface within such upwardly extending part, and an upwardly open hollow plug member having an upwardly extending part with a thin upper edge within and slightly spaced from the inner edge of the upwardly extending part of the annular member and having a downwardly directed seating surface opposite the seating surface of the ring, whereby when an O-ring is inserted between such parts it is engaged by the upwardly and downwardly directed seating surfaces and the upper edges of the two members are substantially at the same level, and whereby filling of the hollow plug with material of the same appearance as that used for the finish surface of the pool bottom will render the arrangement inconspicuous.
Claim 2
Dependent Claim
149 words
A check valve arrangement for installation in the bottom of swimming pools comprising an annular member having an upwardly extending part with a thin upper edge and having an upwardly directed seating surface within such upwardly extending part, and an upwardly open hollow plug member having an upwardly extending part with a thin upper edge within and slightly spaced from the inner edge of the upwardly extending part of the annular member and having a downwardly directed seating surface opposite the seating surface of the ring, whereby when an O-ring is inserted between such parts it is engaged by the upwardly and downwardly directed seating surfaces and the upper edges of the two members are substantially at the same level, and whereby filling of the hollow plug with material of the same appearance as that used for the finish surface of the pool bottom will render the arrangement inconspicuous.
Claim 3
Dependent Claim
34 words
In combination with a valve arrangement as claimed in claim 1, an upwardly tapering downwardly open cone having at its top an outer diameter greater than the interior diameter of said annular seat part.
Claim 4
Dependent Claim
42 words
An arrangement as claimed in claim 2, in which said cone has a wall closing its upper end and lines of weakness around and adjacent the said outer edge of said wall to permit the cutting out of such wall after installation.
Claim 5
Dependent Claim
109 words
In a swimming pool having a concrete bottom resting on a base, an inwardly and upwardly open cone which tapers upwardly resting on such base and enclosed in the concrete, and a valve arrangement as claimed in claim 1 located above said cone and having the opening in said annular member in communication with the opening in the cone, and an O-ring between said seating surfaces, said upper edges of the two members being flush with the upper face of the pool bottom and said plug member being filled with concrete at least a top layer of which is of the same mix as that of such upper surface.