Gasket seals for drain closures

Patent metadata

Field	Value
Publication number	US-11566407-B2
Application number	US-201816161475-A
Country	US
Kind code	B2
Filing date	Oct 16, 2018
Priority date	Oct 26, 2017
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

An exemplary embodiment, among others, of the present disclosure is directed to a drain closure assembly. Such an assembly has a head of the drain closure assembly that is fastened to a top end of a stem, wherein the bottom end of the stem is insertable in a drain shoe. The assembly further includes a gasket fastened around an outer cylinder of the stem below the head. Accordingly, the gasket comprises a series of concentric annular platforms such that a force applied to a top surface of the gasket causes an upper concentric annular platform having a smaller outer diameter to be compressed before the lower concentric annular platform having a larger outer diameter is compressed, thereby creating a seal between the head of the drain closure assembly and the drain shoe.

First claim

The invention claimed is:

1. A drain closure assembly comprising:
a head of the drain closure assembly that is fastened to a top end of a stem, wherein a bottom end of the stem is insertable in a drain shoe; and
a gasket fastened around an outer cylinder of the stem below the head, wherein the gasket comprises a series of concentric internal annular platforms of at least an upper concentric internal annular platform and a lower concentric internal annular platform, wherein the upper concentric internal annular platform is in contact with and supported by the lower concentric internal annular platform such that a force applied to a top surface of the gasket causes the upper concentric internal annular platform having an outer diameter to be compressed before the lower concentric internal annular platform having a larger outer diameter is compressed, wherein the upper concentric internal annular platform has a right circular cylindrical shape and the lower concentric internal annular platform has a right circular cylindrical shape,
wherein the gasket further comprises an upper outer portion and a lower outer portion that each meet at a line that defines a hinge at which the gasket is able to bend, wherein the lower outer portion features a sloped surface from a bottom edge of a rim of the gasket to the line at a top of the lower outer portion, wherein the upper outer portion has a right circular cylinder shape.

2. The drain closure assembly of claim 1 , wherein the gasket is an elastic resilient material.

3. The drain closure assembly of claim 1 , wherein the head of the drain closure assembly is a metallic material.

4. The drain closure assembly of claim 1 , wherein a bottom end of the stem is threaded.

5. The drain closure assembly of claim 1 , wherein a height of the drain closure assembly is 2.25 inches.

6. The drain closure assembly of claim 1 , wherein a width of the head is 2.0 inches.

7. The drain closure assembly of claim 1 , wherein the head of the drain closure assembly is threaded onto the top end of the stem.

8. The drain closure assembly of claim 1 , wherein the head of the drain closure assembly is spring actuated to move to an open position from a closed position.

9. The drain closure assembly of claim 1 , wherein the stem comprises a ⅜ inch threaded post.

10. The drain closure assembly of claim 1 , wherein the stem comprises a 5/16 inch threaded post.

11. The drain closure assembly of claim 1 , wherein the head of the drain closure assembly is a plastic material.

12. The drain closure assembly of claim 1 , wherein the stem comprises the outer cylinder at a top end of the stem that is positioned around an inner cylinder at a bottom end of the stem.

13. The drain closure assembly of claim 12 , wherein the outer cylinder is movable in a vertical direction over the inner cylinder of the stem.

14. The drain closure assembly of claim 13 , wherein the head of the drain closure assembly is adapted to slide downwardly until the gasket is flattened against a flange of the drain shoe.

Assignees

• Danco Inc

Inventors

• Jones Jr Robert Clifton
• Hossain Muhammad Towheed
• Fregoe Casey J

Classifications

• F16J15/3268

  Mounting of sealing rings · CPC title

• F16J15/3284

  characterised by their structure; Selection of materials · CPC title

• E03C1/2306 Primary

  the plug being operated by hand contact · CPC title