Fast flow thread in lavatory drain

Abstract

A splash-proof lavatory drain consists of a top, a tailpiece tube, and a flanged threaded pipe penetrating a drain hole in a vessel interior, wherein the flange engages the rim of the drain hole and is tightened by a nut and seals against the underside of the vessel. The top is a laterally perforated tube surmounted with a dome. The tube portion of the top inserts into the upper interior of a central perforation of the flange such that the dome prevents splash back from the drain interior and the rectangular perforations allow for drainage. This top is attached to the flanged threaded pipe by a range of means including a thread mate or a press fit. Drainage flow is increased by notching the lower edge of each perforation. Drainage flow is increased by notching the bottom of the perforations either partly or fully to the bottom of the top tube.

Claims

1. A flanged threaded pipe with a tubular top surmounted by a dome, wherein: the tube part of the top is rectangularly perforated laterally and the tube is inserted concentrically into a top central perforation of the flanged threaded pipe to a set depth that leaves the bottom edge of the lateral perforations of the tube flush with the pipe flange and available for water to drain through, constituting a drain fitting for a vessel.

2. A drain fitting as claimed in claim 1, wherein: the cylindrical ring of the tube part of the top distal from the dome top is notched at the bottom of the tube perforations, this notching being fully to the bottom of the tube part of the top.

3. A drain fitting as in claim 1, wherein: the cylindrical ring of the tube part of the top distal from the dome top is partly notched at the bottom of the tube perforations, this notching not reaching the bottom of the tube part of the top.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG. 1 shows a lateral view of the lavatory drain with top inserted.

[0008] FIG. 2 shows an exploded lateral view of the lavatory drain with a fully notched top above a drain plug.

[0009] FIG. 3 shows an exploded lateral view of the lavatory drain with a partly notched top above a drain plug.

[0010] FIG. 4 shows a lateral view of a fully notched top.

[0011] FIG. 5 shows a lateral view of a partly notched top.

DETAILED DESCRIPTION OF THE INVENTION

[0012] The lavatory drain in FIG. 1 show a top 13 with a convex upper surface 1 to shed water, the planar underside from which supports a tubular portion bearing perforations 2 interspersed with posts 3. Said top 13 inserts concentrically into a plug 14. The plug 14 comprises a flange 4 for engaging the rim of a drain hole in the bottom of a lavatory vessel, said flange supporting a pipe 5 attached to said flange 4 by a plurality of means. Said pipe 5 bears an external thread 7 onto which an internally threaded nut 9 is threaded in a helical fashion. A slip washer 8 can enable tightening of said nut 9 against a seal 6. At the free end 10 of the externally threaded plug 14 a tailpiece 11 is attached by a plurality of means, its downward free end 12 further connected to a water trap contiguous with piping leading to a sewer.

[0013] An exploded view of this drain in FIG. 2 shows a fully notched top 13 that will insert concentrically into a plug 14. The attachment of the two pieces is achieved by a plurality of means including a threadmate, or a press fit stopped by a stop internal to the plug.

[0014] An exploded view of this drain in FIG. 3 shows a partly notched top 15 that will insert concentrically into a plug. The attachment of the two pieces is achieved by a plurality of means including a threadmate, or a press fit stopped by a stop internal to the plug.

[0015] The fully notched top 13 shown in FIG. 4 displays a plurality of notches fully interrupting the tubular portion distal to the dome top. The tubular portion may be decorated with a fastening feature including a thread, or may be bare tube.

[0016] The fully notched top 15 shown in FIG. 5 displays a plurality of notches only partly interrupting the tubular portion distal to the dome top. The tubular portion may be decorated with a fastening feature including a thread, or may be bare tube.