DRAIN
A grid drain for use on a sink to prevent large objects from entering the drain. The drain includes a tube (12) and a cover (20) that attaches to the top of the tube. The cover has a flat middle (72) and has a peripheral portion (74) that is curved to form a dome, with two circles of holes (46, 52).
Sinks that temporarily hold fluid such as water, commonly have a drain through which water rapidly leaves. The drain has holes that pass small solid objects such as hair without the hair blocking the drain. It is desirable to construct the drain so the holes are oriented and shaped to minimize blockage from debris.
SUMMARY OF THE INVENTIONIn accordance with one embodiment of the invention, a grid drain is provided that can be constructed at low cost and that minimizes blocking. By increasing air flow through the drain, the drain can be used as a cleanout to service the drain. The drain includes a vertical tube and a dome cover that is removably mounted on the top of the tube, the cover having multiple holes. The cover holes are arranged in two circles, including a middle circle where the cover is flat (horizontal), and an outer circle where the cover is curved to form a dome.
The novel features of the invention are set forth with particularity in the appended claims. The invention will be best understood from the following description when read in conjunction with the accompanying drawings.
The cover 20 (
The inner ring 40 of holes have hole axes 92 that are vertical. This allows efficient flow because when water reaches the inner holes 40, the water is moving close to the vertical. The outer ring 42 of holes have hole axes 94 (
Thus, the invention provides a drain that facilitates the flow of water and of solid particles such as hair. The drain includes a cover of a generally dome shape, formed by a curved periphery and a flat (horizontal) middle. Holes in the cover include a ring of inner holes that lie in a flat (horizontal) wall of the cover, while a ring of outer holes lies in a curved periphery of the cover. The inner holes have vertical hole axes. The outer holes have axes that are angled about an eighth circle (about 45°) from the horizontal and from the vertical. The fact that the cover 20 is held by a screw and therefore can be easily removed from the tube 12, allows a plumber to remove the cover and run a “snake” through the tube and pipes to clean them.
Although particular embodiments of the invention have been described and illustrated herein, it is recognized that modifications and variations may readily occur to those skilled in the art, and consequently, it is intended that the claims be interpreted to cover such modifications and equivalents.
Claims
1. A drain that allows water to pass through while blocking large pieces of solid material, said drain including a tube (12) with a vertical axis (14) and a tube top forming a support surface (24), said drain including a cover (20) that covers said tube top and that has a plurality of drain holes, wherein:
- said cover is dome-shaped, with a cover periphery (30) that lies on said tube support surface, and with a cover top (70) lying along said vertical axis, said cover having a ring of inner holes (50) spaced about said axis and said cover has a ring of outer holes (44) spaced about said axis and lying further from said axis than said inner holes;
- each of said inner holes has a primarily vertical hole axis (92) and each of said outer holes has a center with an outer hole axis (94) angled between 15° and 75° to said tube vertical axis.
2. The drain described in claim 1 wherein:
- said cover has twice as many of said outer holes as said inner holes, with each outer hole lying radially halfway between two inner holes as seen in a top view taken along said axis.
3. The drain described in claim 1 wherein:
- said cover has a flat middle portion (72) lying on said axis, that forms said inner holes;
- said cover has a radially outer part (74) that is radially spaced from said vertical axis by more than half a radius of said cover periphery, with said outer part having curved inner and outer surfaces, that form a dome.
4. A drain that allows water to pass through while blocking solid material, said drain including a tube with a vertical axis and an open top, and a cover that covers said open top and that has a plurality of holes, wherein:
- said cover is dome-shaped, with a cover periphery (30) that lies on said tube top, with a cover upper part (70) having an inner circle of holes (40), and with a cover peripheral portion (70) having an outer circle of holes (46);
- said holes of said outer circle of holes having vertical axis (92) and said holes of said lower circle of holes have axes angled between 15° and 75° from the vertical.
5. The drain described in claim 4 wherein:
- said cover has a periphery with top and bottom surfaces (80, 82) that each extends in a quarter of a circle, as seen in a sectional view taken on said vertical axis, to form said dome.
Type: Application
Filed: Oct 2, 2013
Publication Date: Apr 2, 2015
Inventor: Norman Usher (Inglewood, CA)
Application Number: 14/044,656