US 11,680,397 B2
Kitchen sink drain stopper and strainer
Sanjay Ahuja, Katy, TX (US)
Assigned to PF Waterworks LP, Houston, TX (US)
Filed by PF Waterworks LP, Houston, TX (US)
Filed on Jun. 23, 2021, as Appl. No. 17/355,916.
Claims priority of provisional application 63/043,124, filed on Jun. 23, 2020.
Prior Publication US 2021/0395986 A1, Dec. 23, 2021
Int. Cl. E03C 1/262 (2006.01); A47K 1/14 (2006.01); E03C 1/23 (2006.01)
CPC E03C 1/262 (2013.01) [A47K 1/14 (2013.01); E03C 1/2306 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A drain stopper and strainer for a kitchen sink having a drain opening and a flanged drain fitting attached to the kitchen sink at the drain opening, wherein the flanged drain fitting comprises a tube having an upper end, a radial-extending flange on its upper end and an inside shoulder spaced away from the upper end, wherein the radially-extending flange has an upper surface, and wherein the upper surface is at or below a lowermost inside surface of the kitchen sink while in operation, the drain stopper and strainer comprising:
an open-close mechanism having upper and lower ends and open and closed positions;
a cap engaged with the upper end of the open-close mechanism;
a cap seal engaged with the cap;
a strainer element engaged with the lower end of the open-close mechanism, wherein the strainer element has a sealing surface, wherein the cap seal seals against the sealing surface of the strainer element, wherein the sealing surface of the strainer element is at or below the upper surface of the radially-extending flange while in operation, and wherein the strainer element is designed and sized to be sealed with the flanged drain fitting; and
an annular seal engaged with the strainer element, wherein the annular seal is designed and sized to prevent water from flowing through an annular space defined between the strainer element and the flanged drain fitting, and wherein the drain stopper and strainer is designed, sized and configured to be removably received in the flanged drain fitting and to rest on the inside shoulder of the flanged drain fitting.