US2269202A - Vent lift - Google Patents

Description

Jan. 6, 1942. P. R. HOLLAENDER VENT L-IFT Filed March 22, 1940 2 Sheets-Sheet l /V/////////////llflt I VII/llIII/IIIIIIIII IIIIVIIl I I INVENTOR. BY 5 $2M WMKM ATTORNEYS Jan. 6, 1942. P. R. HOLLAENDER VENT LIFT Filed March 22, 1940 2 Sheets-Sheet 2 /lllllllllllllllllllll/J7%W,"

INVENTOR.

WMWMZATTORNEYS Patented Jan. 6, 1942 UNITED STATES PATENT OFFICE VENT/:LIFT I Peter R. Hollaender, Cincinnati, Ohio Application March 22, 1940, Serial No. 325,456

, 9 Claims. 1. 285-31) This invention is directed to vent pipes of the type adapted to [discharge obnoxious gases through the roofs of buildings. More specifically, the invention concerns the provision of a watertight seal at the area where the pipe passes through the roof, and a vent pipe which is constructed and arranged to make the provision of such seal very easy and convenient.

The vent or lift fittings to which the invention is directed are those commonly used in building construction for the purpose of extending a discharge pipe above the roof line, as required by law in most municipalities. In the usual'con-- struction, a pipe leads from the source of exhaust or plumbing system to be vented, for instance, a bath soil stack or an appliance discharging fumes, to some point just below the roof line, and an extension fitting is mounted upon thispipe to project through the roof to discharge the gases at some point substantially above it, for instance, one or two feet.

It is necessary that there be a water-tight seal at the juncture where the extension passes through the roof, in order that rain water or melting snow be prevented from leaking through the roof and causing rotting of the timbers or damage to the plaster below. 'Heretofore it has been conventional to surround the vent pipe with lead flashing and the like for this purpose. The flashing usually extends under the roofing material and is calked tightly about the pipe, in some instances, roof cement also being used'so as to make the joint as waterproof as possible. However, through exposure of the joint to heat and cold. the expansion and contraction which takes place eventually causes a fracture or separation of the joint and the seepage of water through it is permitted, which usually results in damage to plastered ceilings below. Moreover, it is a tedious job to calk a' lead gasket or a poured joint and the installation, particularly on sloping roofs, is a relatively expensive one.

The primary object of the invention has been to provide an inexpensive vent fitting which is constructed and arranged to simplify these installation requirements, and to provide a watertight seal at the aperture in the roof through which the vent extends.

A further object of the invention is to provide, a vent fitting which can be used on roofs of various pitches, as well as on flat roofs.

, Other objects of the invention, and the advantages of the structure, are disclosed in the followingdescriptionof the drawings, in which preferred embodiments of. the invention areil-. lustrated.

In the drawings:

Figure 1 is a cross-sectional view through a vent fitting constructed in accordance with the invention.

Figure 2 is a perspective view showing the appearance of the fitting when installed upon a roof. I

Figure 3 is a cross-sectional view of a modifie type of fitting.

Figure 4 is a perspective type of fitting.

In the preferred embodiment, the device is comprised of one or more sections which normally resid below the roof and one or more sections which extend above the roof. tions may be mad of cast iron or other metal view ofthe modified or ceramic ware, and may, conveniently, be

termed the lower and the upper sections respectively. I

The lower end of the lower section which may be called an adapter is constructed to receive, or be received by, the vent pipe, and the upper end of it terminates in a bell mouth. The upper or lift section, in turn, is provided with an annularlip or flange which is constructed to cooperate with the bell mouth of the lower part to ting by screwing the upper and lower sections together.

The lower section of the fitting may be in two parts, if desirable, these joining one another obliquely to the axis of the unit. Otherwise expressed, a collar fittingmay be clamped between the annular flange of the upper section and the adapter fitting so as to provide two joints, either of which is suitable for receiving the flashing; one of these joints is normal to the axis ofthe These secmolding of the flashing to the contour of the roof is therefore avoided. It is desirable that the joint which is normal to the axis of the fitting be uppermost, though this is not necessary. It will be understood, however, that it is desirable to mount the fitting relative to the roof line, so that that joint which is to be used is either on a line with, or adjacent to, the plane of the roof. It is usually also desirable that a gasket be installed in the juncture which is not used to receive flashing, in order that the escape of gases be prevented except at he discharge mouth of the vent.

The extension unit which is illustrated in Figure 1 is of a simplified type adapted for flat roofs or those with relatively slight pitch. The lower section of this type of fitting is indicated generally at I (Figure 1) and comprises a cylindrical member terminating at its lower end in a hub 2 which is adapted to be connected to the soil pipe. If the vent line is of relatively small diameter, the hub 2 may be threaded, as shown, for convenience in connecting it to the pipe;.if the vent line be of relatively large diameter, the hub may be of bell or spigot or other formation, depending upon the nature of the vent line at which it is to be connected. The lower section I is of enlarged diameter above the hub, as shown at 3 in the drawings; its internal diameter may be appreciably greater than that of the preceding vent pipe, for preventing frost accumulation at the exposed portions from choking the outlet.

The upper end of the lower section terminates in a bell mouth, indicated generally at 4. This portion, more specifically, comprises an annular seatfi which preferably is chamfered, and a lipportion 6 surrounding the seat and extending above it. The edge of the lip is preferably of rounded formation and free of sharp edges, so that the typical lead or copper sheathing may be peened around the lip and downwardly within it, without being cut or torn by the edge.

At a portion of the lower section I intermediate the bell mouth and the lower hub, the internal surface of the lower section contains threads '8. These preferably are cast or formed into the section at the time that it is made and are of relatively slight pitch. By rotating the one section relative to the other, parts are screwed together and pressure is applied upon the flashing Which is received between the members forming the joint, so that a waterproof connection is provided.

The upper section of the fitting, that is, the portion which extends generally above the roof line, is indicated at 8 and comprises a tubular vent portion 9 and a shank H). The shank fits telescopically down within the lower section and is provided with threads II for engagement with the threads I.

A lip l2, providing an annular flange and a recess l3, extends from the exterior of the upper section 8 at some point along its length relative to the threads on the shank ID, for engagement with the lip 6 of the lower section. It is preferable that the portion of the upper section beneath the recess be configurated to complement the seat of the lower section, in order that the two fit together relatively snugly. Thus, by rotating the upper section relative to the lower one, it will be seen that the hp 6 is caused tobe seated within the recess l3.

In utilizing the fitting on a construction job, the lower section is first installed upon the vent pipe, then a hole of diameter smaller than the diameter of the lip 6 is cut centrally in a sheet of flashing, for instance, a piece of sheet lead about 18" square overall, so that the flashing can surround the bell mouth of the lower section and rest upon the roof. Then, with a hammer, the marginal portion of the flashing surrounding the hole is piened down into the bell mouth and, finally, the upper part of the fitting is inserted into the lower section and screwed down until the lip 6 compresses the flashing against the lip l3 in sealing relationship. The flashing surrounding the vent may be attached to the roof sheeting to reside eventually under the roofing material proper, when it is applied.

There are several features of considerable practical importance which reside in the present construction.

It is not necessary to use molten lead nor calk the flashing joint, and no tools except a knife and a hammer are required to complete the installation. More important, however, all apertures, through which water might seep, drain into the vent line so that any leakage which does occur can cause no damage.

The shank portion ill of the fitting serves the purpose of providing means for connecting the upper and lower parts, so that the lip 6 resides within the recess [3 in clamping relationship, and of preventing the extention of the vent above the roof from coming loose and falling from its position.

The fitting which is disclosed in Figure l is adapted particularly for use on flat roofs or those of slight pitch, but may also be used on roofs of substantial pitch by bending the sheathing surrounding the fitting to complement the pitch of the roof.

Figure 3, on the other hand, illustrates a universal device adapted to be used on flat or pitched roofs, as the case may be, without substantial bending or forming of the sheathing to the roofs slope. In this structure, the lower section is comprised of twomembers [4 and [5. The collar section, l5, terminates at its one end in a similar bell mouth which, however, is disposed in a plane oblique to the axis of the fitting; for instance, at an angle corresponding approximately to the pitch of the roof upon which it is to. be used. The lowermost section of the assembly is provided with the threads I for engagement with the threads ll upon the shank of the extension member, and the intermediate section [5 is therefore clamped between the upper and lower members when they are screwed together at the time the fitting is installed. A gasket I6 is installed in the bell and spigot not in use.

If the extension is to project through a flat roof, the sheathing is connected to the fitting within the upper bell mouth, as at A; while if the roof is of substantial pitch, the sheathing is inserted into the oblique bell mouth, as at B. The oblique bell mouth may reside at an angle of approximately 30 to the normal to accommodate a range of roof pitches from approximately 15 to 45. A variety of sections of different angles may be made if desirable, though the sections shown will accommodate most roof pitches.

While the fitting has been disclosed particularly in relation to vent lifts used in the construction of residences, it may be used for industrial purposes in the venting of fumes or vapors.

Having described my invention, I claim:

1. A vent fitting which comprises a tubular lift having an annular lip extending from its periphery, a connector fitting adapted telescopically to receive a portion of the tubular lift beyond the lip, thread means provided upon the telescoping portions for screwing them together, a collar fitting extending telescopically around the tubular lift intermediate its lip and the connector, and joint means adapted for the reception of flashing material between the collar and the lip at its one end, and alternately between the collar and the connector at its other end.

2. A vent fitting which comprises a tubular lift having an annular lip extending from its periphery, a connector fitting adapted telescopically to receive a portion of the tubular lift beyond the lip, thread means provided upon the telescoping portions for screwing them together, a collar fitting extending telescopically around the tubular lift, intermediate the lip and the connector, and joint means adapted for the reception of flashing material formedbetween the lip and the collar, at its one end, and between the connector and the collar, at its other end, one of said joints extending about the tubular lift in an axis which is substantially normal to the axis of the lift, and the other joint extending about the tubular lift in a plane which is oblique to the axis of the tubular lift.

3. A vent fitting which comprises a tubular lift having an annular lip extending from its external periphery intermediate its length, a connector fitting telescopically positioned over a portion of the tubular lift below the lip, a collar fitting positioned intermediate the connector fitting and the lip, cooperating threads carried by the connector fitting and the telescoping portion of the tubular lift for clamping the collar between the connector and the annular lip, the collar forming with the annular lip a pressure connection which is substantially normal to the axis of the tubular member, and forming with the connector 2. pres sure connection which is oblique to the axis of the tubular member.

4. A vent fitting which comprises a tubular member having an annular lip extending from its periphery intermediate its length and defining a shank portion at its one side and an extension portion at the other, a collar, of lesser length than the shank portion and greater internal diameter, fitting telescopically around the shank and having a rim cooperating with the lip to form a pressure joint suited for the reception of flashing material therein, and a connector member telescopically fitting around the shank portion, the portion of the shank extending beyond the collar being threadedly connected to the shank and forming another joint suited for the reception of flashing material therein, one of the joints being substantially normal to the axis of the fltting and the other being oblique to the axis of the fitting.

5. A vent fitting of the type described, comprising telescopically interfitting tubular sections which are adapted to be screwed together, means providing an annular pressure joint between the two sections, and means adapted for the reception of flashing material therein.

6. A vent fitting of the type described, comprising telescopically interfitting tubular sections whichare adapted to be screwed together, and means providing a pair of annular pressure joints between the two sections, which joints are adapted alternatively for the reception of flashingmaterial therein, one of the joints being normal to the axis of the tubular sections and suited for the reception of flashing extending from a flat roof, and'the other of the joints being oblique to the axis of the tubular members and suited for the reception of flashing extending from a pitched roof.

'7. A vent pipe construction, comprising a lower section and an upper section telescopically engaged in the lower section, said upper section including an annular lip, flashing having the margin of its opening adapted to be clamped between the upper'end of the lower section and the lip of the upper section, the lip of said upper section overhanging the secured margin of the flashing and forming a deflector adapted to direct rain outwardly away from the joint, and component means on the respective sections adapted to secure them together to clamp said margin of the flashing between the upper end of the lower section and the lip of the upper section.

8. A vent pipe construction, comprising a lower section and an, upper section telescopically engaged in the lower section, said upper section including an annular lip adapted to overhang the upper end of the lower section, said lower section providing an annular recess adapted to receive an inwardly downwardly turned margin of an opening in flashing adapted to be clamped between the upper end of the lower section and the lip of the upper section, the lip of said upper section overhanging the secured margin of the flashing and forming a deflector adapted to direct rain outwardly away from the joint, and component means on the respective sections adapted to secure them together to clamp the flashing between the upper end of the lower section and the lip of the upper section.

9. A vent pipe construction, comprising two sections, the upper section providing an annular lip adapted to overhang the upper end of the lower section, means for drawing the sections together, and a flashing having the margin of its openingsecured between the lip of the upper section and the upper end of the lower section,

said lip overhanging the margin and providing a water shed, said flashing being draped downwardly from the lip to provide a further water shed.

7 PETER R. HOLLAENDER.

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