Pool drain assembly

Claim 1

A pool drain assembly for a swimming pool having a vinyl liner comprising a drainage receptacle defined by sidewall and bottom wall means, said drainage receptacle having an upper edge portion substantially at a level defining a bottom of a swimming pool, means defining a seating surface extending from said edge portion to said sidewall defining means and toward said bottom wall means, a vinyl liner sheet having means defining an aperture therethrough, said aperture defining means comprising lip means on said seating surface clamping ring means having a triangular cross section and being defined by a conical peripheral surface, a cylindrical inner surface and a planar top surface, said conical peripheral surface being seated on said lip means, said top surface being substantially co-planar with a top surface of said vinyl liner surrounding said lip means, means clamping said ring means to said seating surface to securely sandwich said lip means therebetween, a strainer plate having a top surface substantially co-planar with said top surface of said vinyl liner and said top surface of said clamping ring means, said strainer plate being surrounded by said cylindrical inner surface of said clamping ring means and having a peripheral edge supported by said seating surface.