US2283160A - Roof drain - Google Patents

Description

May 19, 1942.

E. W. N. BOOSEY ROOF' DRAIN Filed March l5, 1941 l2 4 fww.

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Patented May 19, 1942 arance Unirse s'rg'rss earner orifice nooF DRAIN Edward W. N. Boosey, Detroit, Mich. Application March 15, 1941, serial No. 383,515

5v Claims. (C

This invention relates to rcof drains, the object being to provide a drain for a substantially fiat roof of such construction that a sheet of water will tend to be maintained on the roof in the summer time to protect the roonng material from disintegration from the eifects of the hot sun and with which is provided a means for preventing the retaining of Va sheet of water on the roof.

Ordinary flat roofs are usually covered with a sheet material together with tar and/or gravel and the hot sun tends to destroy it by causing the tar to ow and causing the edges of the sheets to turn upwardly which eventually provide for ingress of water to the building. If a coinparatively thin film or sheet `of water is maintained on the roof in the summer time which may be replenished from time to time, disintegration by heat of the sun will be prevented at least to a major degree and such sheet of water maintained on the roof lis to a considerable degree preventive of the transfer of heat through the roof to the interior of the building.

A further object and feature of the invention is to provide a roof drain of a character to maintain a sheet of water on a r-oof that is of simple and inexpensive construction and useable in the summer period for the said purpose of maintaining water on the roof and adapted by removal of a convenient portion thereof to prevent accumulation of water on the roof as would be desirabler during the winter period in order to prevent an accumulation of ice.

These and other objects and various novel features of the invention are hereinafter more fully described and claimed, and the preferred character of construction of a roof drain embodying my invention is shown in the accompanying drawing in which-v Fig. 1 is a section in plan view taken on line I-I of Fig, 2.

Fig. 2 is a vertical section taken on line 2 2 of Fig. 1.

A roof drain in accordance with my invention is provided with a main body I having side walls tapered at the bottom and terminating in a cylindrical lower end 2 adapted for connection of a conduit therewith indicated by dotted lines 3 which may be caulked in place. The body of the drain has at its open upper end a peripheral outer flange over which thevroof material or hashing 5 may be laid. The roof material has a central aperture f5 of a diameter approximately the same as the inner diameter of the upper end of the drain body. The flange 4 is preferably provided with a circular recess I to receive a sealing material and over which the roof flashing 5 may extend. The flashingissecured in place by a head 8 vwhich is provided at its lower end with a peripheral flange 9 having a rib I in its lower surface aligning with the recess 'I of the body and forcing the roof hashing vdownwardly thereinto torseal the'iiashing to the body flange 4. 4The head 8 is secured in place by means of cap Screws II which extend through the flange 9 of the head into the flange I of the body thereby clamping the roofing in; place.

A featured this invention is in the character of the head. It is. of a tubular material having an upstanding wall I2 providing a drain substantially circular in form throughout the greater part of its periphery and on one side is formed with the re-entrant portion I3 as shown more clearly in Fig. 1. At this re-entrant portion the base extends inwardly of the flange 9 forming a Aflat surface substantially'on ythe same level as the roof flashing `5 and within the re-entrant the yupper end of the member I2 from the roof -Y flashing is sunicient toprovide a desired depth of water on the roof in areasV beyond the depres- 1 sion (if any) in which the roof drain may be positioned. Preferably also', to prevent an accu- `mulation of debris on or about the head, I provide aV slotted cover member I5 which has a bottom flange I6 resting on the flange 9 of the head and secured thereto as by screws Il. The grat'- ing member I5 extends above the upper end .of Y

the tubular portion I2 of the head and is also apertured at its top as indicated at I8. The grating member thus shields the drain head as well as the plugged aperture from an accumulation of material that might otherwise pass down into the head or accumulate over the plugged aperture and choke the flow therethrough.

With this arrangement of parts, I provide a means for maintaining water to certain depth on a roof, any excess water readily flowing Vover the top of the tubular portion I2 of the head and thence to the outlet and further, whensuch 4accumulation of Water is not desired, as forl instance in winter time, the plug Iii is removed and thus all the water may drain from the roof.

The height of the dam I2 may be varied, depending yupon the depth of the water required to be retained on the roof and the plugged aperture I4 is at the level of the flashing to prevent any retention of water from the drain head. The plug I4 may be of brass and the threaded ferrule I Ia may be inserted in the iron casting and a pin Mb inserted to prevent rotation thereof. By use of such brass plug and brass ring 14a, the rusting of the plug in place is prevented, and also the threads to receive the plug do not disintegratel as would be the case if the remov-V able plug were threaded directly in the threaded opening in the cast iron member.

The essential feature of the invention resides in the provision of a dam which is of a height to determine the desired water level and water rising above the determined level flows over the top of the dam I2 through the head to the outlet. The plug I4 has a socket in its upper face and a wrench having an end to iit the socket may be introduced vertically downward through an opening in the top of the grating to permit the plug to be removed or screwed back to place without necessity of removal of the grating member I5. I

From the foregoing description, it is believed evident that the various features and objects of the invention are attained by the structure described; that it is simple and inexpensive in construction, and that various changes may be made in the structure without departing from the spirit and scope of the invention as set forth in the appended claims.

Having thus briefly described my invention, its utility and modeof operation, what I claim and desire to secure by Letters Patent of the United States is:

1. A roof drain comprising a body member having an open upper end and a peripheral flange thereabout and an opening at the bottom for reception of a conduit, a head having a flange adapted to be mounted on the body flange, a roof flashing secured between the said flanges, said head having' an integral vertical tubular portion extending upwardly and having an open upper end normally determining the depth of water that may accumulate on a roof, and a shield for preventing debris entering the body through the tubular portion comprising an apertured* member enclosing the head.

2. A roof drain comprising a body member having an open upper end and an opening at the bottom for the reception of a conduit, a peripheral flange provided at the upper end of the body, a head having a flange adapted to be mounted on the body ange for the securing of a roof flashing therebetween, said head having an integral vertical open ended tubular portion extending to above the iiange and providing a dam for retaining water to a deiinite depth about the drain, said flange having an opening eXteriorally of said tubular portion through which water may completely drain from the roof, to said conduit, and means manually operable to open or close said opening.

3. A roof drain comprising a peripherally hanged body member having an open upper end shaped at the bottom to receive a conduit, a head therefor including an open ended tubular portion having a peripheral ange for mounting on the body flange, said tubular portion having on one side thereof above the flange a re-entrant portion, said ange of the head at the said reentrant portion having a threaded opening, a plug for closing the opening, the height of the tubular portion above the ange determining the level of water maintained on a roof, and an apertured shield enclosing the said upper end of the tubular portion and secured to the flange of the head.

4. A roof drain comprising a peripherally anged body member having an open upper end and shaped at the bottom to receive a conduit,

a drain head constructed to provide a dam and having a peripheral flange for mounting on-the body iiange, said dam being of a height to maintain a predetermined level of water about the drain head, a roof flashing secured between the said anges, said head flange having an opening at one side of the dam practically at the roof level through which liquid from the roof may drain into the conduit, and a plug for closing the opening whereby the dam is made eiective to maintain a denite water level on the roof, an apertured shield secured to the flange at the edge and enclosing said dam and the opening in the flange.

5. In a roof, a body member through which liquid may discharge from a roof, a conduit providing for discharge of liquid from the body member, said body member being arranged to provide a dam for maintaining a predetermined level of water on the roof and permitting water tending to accumulate to a greater depth to flow through the drain head into the conduit, arid means associated Vwith the body member and spaced from the dam operable to provide for discharge of water through the drain head to prevent an accumulation of water on the roof.

EDWARD W. N. BoosEY. n

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