US2275628A - Sealing means - Google Patents

Description

March 10, 1942. 1, HlRsHsTElN 2,275,628

SEALING MEANS Filed May 9, 1940 INV ENT OR. JOSEPH HRsHsTs/N BY, www* ATTORNEY 3.

Patented Mar. l0, 1942 UNITED STATES PATENT OFFICE SEALING MEANS Joseph Hirshstein, Cleveland, Ollio Application May 9, 1940, Serial No. 334,232

7 Claims.

This invention relates to sealing means for roof drains andthe like and' has for itsprimary object the provision of an effective liquid seal between the drainage member and the surface to be drained.

While concrete is now most generally in use for roof or deck constructions, other materials such as wood, metal or pre-cast slab may also be used for this purpose. The drainage members for use on roofs or decks are then anchored or embedded in one or another of these materials during the usual course of construction. In many instances it is desirable to use a flashing material about the drain body to thereby extend the effective perimeter of the drain body beneath any roofing material which is later applied. A flashing for this type of construction is generally formed by pressing a sheet of flexible copper, or other material, to a shape which will. t about the contour of the drainage member. It is apf parent however that the utility of a flashed drain resides entirely in the effectiveness with which the ilashing material is sealed to the drain body. To this extent it has sometimes been the practice to assemble and seal the flashing material to the drain member before it leaves the place of manufacture, as the tools and facilities for accomplishng this purpose are more readily available in a shop or factory than they are at the place of installation. This practice, however, has been found to be objectionable for the reason that each drainage member so assembled musty be shipped individually to avoid unnecessary bending of the flashing. However, even if such precautions are taken, the flashing material will be subjected to further abuse when it arrives at the place of installation and the concrete is poured about the drain member.

Having considered the difficulties which are experienced in the sealing of drainage members, it is anv object of my invention to provide a drain `body with an effective liquid seal in which the flashing material may be sealed to the drain body at the place of installation. A further object is the provision of an effective liquid seal for a drainage member in which the sealing of the flashing material may be accomplished independently of the sealing of any roofing material which may thereafter be applied.

Further objects of my invention will become more apparent from the following description given in connection with the accompanying drawing, in which Fig. 1 is a sectional viewtaken through a drainage member embodying my invention; Fig. 2 is an enlarged sectional View taken adjacent one of the clamping members illustrated in Fig. 1; and Fig. 3 is a plan view of the clamping arrangement'illustrated in Fig. 2.

Referring now to Fig. 1 there is illustrated a drainage member I, which is usually anchored or embedded in a layer of concrete for use on a roof or the like, wherever such an installation is required. The drainage member I comprises a hollow drain body 2, having a removable strainer 3 and a waste pipe 4. The drain body 2 of flanged outwardly as at 5, in the direction of the surface to be drained and provision is made for a continuous sealing well'll), at the base of the flanged' portion 5. The well I Il is preferably formed by the addition of a vertical flange I I to the usual drain body construction, to thereby provide a dam for retaining a quantity of plastic sealing material I2 within the well. The top-of the flange II determines the sealing level for the drain body 2, as indicated by the broken line S. L. in Fig. 2, and it is of considerable importance that the sealing level S. L. be disposed below the level of the surface to be drained to thereby avoid anyv seepage from creeping beneath the roofing material, which is thereafter applied. The sealing material I2 is preferably made from a good tar or pitch or any other plastic material which will not become brittle and crack after it has been in use.

After the drain body 2 has had sufficient time to become set in the concrete the refuse and excess material may be removed from about the drain body and the well I 0 be filled with tar or other suitable plastic material. A flashing material I5, which has been pressed to yfit about the contour of the drain body is thereafter pressed into the well Ill, thus causing a quantity of the sealing material to be squeezed upwardly in between the flashing material and the drain body. In instances however where the particular specifications require several layers of roofing material it maybe desirable to lay several layers of felt before the flashing is applied, in which event the procedure will be substantiallythe same. A final roofing material I6 may thereafter be applied at any time, the selvaged edge of which is cut so that it will extend into the sealing material I2 and thus force a quantity of the sealing liquid between the respective layers I5 and I6.

The respective materials I5 and I6 are preferably held in place by an annular clamping ring I1 for the flashing material and a similar ring I8 for the roofing material, the latter of which is also provided with a gravel retaining wall I9, in the event that this type of roong is to be used. To secure the respective clamping rings to the drain body a series of clamping posts 20 are positioned on lugs 2I, projecting inwardly from the drain body 2. The clamping posts 2B may be constructed in the form illustrated in the drawing, or as shown in my previous patent for Clamping means No. 1,601,498 and it is lpreferable that the clamping postsV 20 be readily removable to thereby provide enough clearance for positioning the flashing material I5 or the clamping ring I1. The clamping post is provided with a clamping bolt 25 for thread-V ed engagement with the upper curved portion 26 of the post. The bottom of the bolt 25 is` positioned for vertical alignment with the top of the ring I'I and if it is found desirable the surface of the ring may be provided with a groove 21, or other suitable aligning means by which to receive the direct pressure of the bolt 25.

After the flashing material has been sealed and secured in place, the nal roofing material I6 may be applied at any time depending upon the convenience and sequence of operations which are taking place in the course of the building construction. If a single layer or roofing material is used, as illustrated in Fig. 2, the selvaged edge is cut so that it will extend into the sealing material I2. The clamping ring I8 is thereafter applied and an arm 30, carried by the clamping bolt is swung into Contact with a step-up lug 33 positioned on the upper surface of the ring I8. The arm is preferably provided with a small projection 3l adapted to be received by an aligning recess 32 in the lug 33. When the arms are thus aligned the ring I8 may be clamped to the material I6 by rotating the nut 34 carried on the upper stemcf the bolt 25.

It may therefore be seen that while the same Cil clamping post may be employed for securing both rings to the drain body the roofing material may be clamped independently and at a later time than the sealing and securing of the ashing material. During such an interval the larms 1 30 may be swung out of alignment with the ring I3 as `indicated by the broken lines in Fig. 3. The present arrangement is also advantageous where several layers of felt are used beneath the surface roofing material as the flashing may be r inserted between any desired layers of material to accommodate the successive stages of operation taking place on the roof. It is further apparent that the respective layers of ashing or roofing material are sealed below the Water level of the roof, thereby eliminating any seepage which may otherwise occur.

I claim:

l. In a seal for a drainage member, a drain body adapted to receive individual layers of flashing and roong material, the flashing extending into said drain body beyond the edge of the roofing material and means for independently clamping the respective edges of said material to the drain body.

2. In a seal for a drainage member, a drain Abody having a recessed portion adapted to receive the cut edges of individual layers of roofing material below the level of the surface to be drained, one of said layers extending into said drain body beyond the edge of the other layer, a plastic sealing material within the recess and means for independently clamping the respective edges of said material to the drain body.

3. In a seal for a drainage member, a drain body having a continuous recessed portion disposed internally therein for receiving a quantity of a plastic sealing material, a roofing material and a flashing material extending into the sealing material, the ashing material extending into said drain body beyond the edge of the roofing material, a clamping post carried by the drain body and means associated with the clamping post and the drain body to independently clamp the inner edges of the respective materials to the drain `body below the level of the sealing material in the recess.

4. A seal for a drainage member comprising a drain body having a continuous Well for receiving the internal edges of a roofing and a flashing material respectively, a clamping ring for the roofing material and a second clamping ring for the flashing material, a clamping post carried by the drain body and means carried by the clamping post for independently securing the respective clamping rings to the drain body.

5. A seal for a drainage member comprising a drain body having a continuous recess for receiving sealing material and the internal edges of a rooiing and a flashing material respectively, a clamping ring for the roofing material and a second clamping ring for the flashing material, a clamping post carried by the drain body and means carried by the clamping post for independently clamping the edges of the respective materials to the drain body, below the level of sealing material in the recess.

6. A seal for a drainage member comprising a pair of clamping rings adapted for individual engagement with respective layers of roong and ashing material, a clamping post carried by the drain member, means carried by the clamping post for securing one of the clamping rings to the drain member and a second means swingable about the first named means to secure the other ring to the drain member.

7. A seal for a drainage member comprising a drain body having a continuous internal recess for receiving a quantity of a plastic material, a pair of clamping rings adapted to secure the edges of a flashing and a roofing material to the Vdrain body Within the recess, a clamping post carried by the drain body, and clamping means for engagement with one of the rings and a second clamping means swingable about'the rst clamping means for positioning the same in engagement with the other ring, and means carried by the post for independently exerting a clamping pressure on the respective rings to thereby secure the respective materials to the drain body'.

JOSEPH HIRSHSTEIN.

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