Lift rod pop-up drain assembly
AssigneeCompass Manufacturing International, LLC
InventorsKen Sapp, DeChang Li
Life of this patent
Estimating the term…
Abstract
The invention describes a quick install lift rod pop-up sink drain assembly comprising a drain body, a drain plug, a horizontal pivot rod used as a lever for raising and lowering the drain plug, a lock ring which rotatably secures the horizontal pivot rod to the drain body, and a lift rod rotatably connected to the outer free end of the horizontal pivot rod and used to raise or lower the free end of the horizontal pivot rod. A spherical portion of the horizontal pivot rod is rotatably captured inside a free end of a connector which is integral with the drain body and which contains pawls which capture the spherical portion of the rod and allow up and down movement of the rod with respect to the drain body, causing the drain plug to open and close.
Claims1
A pop-up drain assembly comprising a drain body, a drain plug, a horizontal pivot rod, a lock ring, and a lift rod rotatably connected to the outer free end of said horizontal pivot rod;
- said drain body being mostly cylindrical and comprising a lower unthreaded section, an upper threaded section and a middle unthreaded section with a drain tee connector stem extending outward perpendicularly from said middle section, said drain tee connector stem including a smooth section terminated by a castellated section containing at least two pawls, each of said at least two pawls including a radially outward protruding step and an inward facing ramped step;
- said horizontal pivot rod including an integral spherical ball located about two inches from a first end, said drain plug having an aperture formed therein at a bottom end, said drain plug inserted downward into said drain body, said aperture in said drain plug end aligned with said drain tee connector stem, said first end of said horizontal pivot rod pushed through said castellated section of said drain tee connector stem, said ball of said horizontal pivot rod pushed through said pawls and snapped into said drain tee connector stem, said drain tee connector stem having an inner square annular void formed therein, said annular void capable of receiving a flat ring seal, a curvature of said inward facing ramped steps, matching a curvature of said ball, said drain tee connector stem having inner vertical guide walls said horizontal pivot rod having square vertical shoulders cooperatively and slidably engaging said vertical guide walls, said lock ring comprising a hollow cylinder with two wings extending radially outward from outer walls of said lock ring and two downward extending lugs integral to bases of said two wings, said lugs cooperatively pressing against said drain body when said lock ring is tightened, said lock ring having an inner diameter equal to an outer diameter of a circle formed by said outer walls of said at least two pawls, said lock ring having a cylindrical void formed in an outer end thereof for receiving said pawl steps extending radially outward from said free edges of said at least two pawls, said drain body having two stop lugs extending radially outward therefrom providing a positive stop to locate said lock ring in a position which causing said pawls to apply holding pressure against said ball, said drain plug comprising a cap, a longitudinal body with four longitudinal perpendicular walls and a downward extending drain plug lug having an aperture formed therein, said first end of said horizontal pivot rod being inserted into said drain tee connector stem and then inserted into said aperture of said plug lug, said four longitudinal perpendicular walls together forming a cross, said drain body having an integral arcuate lug extending radially inward, providing a guide cooperatively engaging two of said walls of said cross to help insure that said drain plug is positioned properly in said drain body.
Dependencies are inferred from the claim text.