US2902939A

US2902939A - Evaporative cooler pump

Info

Publication number: US2902939A
Application number: US734298A
Authority: US
Inventors: Elton T Massingill
Original assignee: Lennox Industries Inc
Current assignee: Lennox Industries Inc
Priority date: 1958-05-09
Filing date: 1958-05-09
Publication date: 1959-09-08
Anticipated expiration: 1976-09-08

Description

P 8, 1959 E. T. MASSINGILL 2,902,939

. EVAPORATIVE COOLER PUMP Filed May 9, 195a ELTON TI MASS/NG/LL INVENTOR.

A TTORNEY United States Paten EVAPORATIV E COOLER PUMP Elton T. Massingill, Fort Worth, Tex., assignor to Lennox industries, Inc., Marshalltown, Iowa, a corporation of owa Application May 9, 1958, Serial No. 734,298

1 Claim. (Cl. 103-87) This invention relates to pumps and has reference to partially submerged units such as those used in the tanks of evaporator Window coolers.

More particularly, the invention is directed to pumping units wherein a centrifugal pump having a vertical axis is located beneath a liquid level and is driven by a motor positioned thereabove. While the invention is not limited to a particular use, the class of pumps referred to are generally employed when recirculating relatively small volumes of water, for example, in window coolers where water is raised from a tank through a tube to a perforated distributor pipe over an evaporator pad or the like. The water then trickles downwardly through the pad, Where it is aerated, and thence returns to the tank. Ordinarily, tap water is used for this purpose, but it is well known that such water frequently includes corrosive elements due to unfiltered impurities and chemical content.

An object of the invention is to provide a pump unit of the described class which will more effectively resist corrosion and thereby reduce repairs and replacements.

A particular object of the invention is to provide a simplified construction which may be quickly and economically assembled.

A further object of the invention is to provide a centrifugal pump housing which may be conveniently opened and closed, when necessary, by means of a single locking ring.

These and other objects will become apparent from the following description of the accompanying drawings, wherein:

Figure l is an elevational view of a pump unit embodying the features of the invention.

Figure 2 is an enlarged vertical broken sectional view of the lower portion of the pump unit and particularly showing the centrifugal pump including the base, pump housing, impeller, removable bottom and locking ring holding the latter in place.

Figure 3 is a bottom plan view, shown partly in broken section, and illustrating the housing bottom and locking ring in assembled position.

The form of the invention shown is generally comprised of a circular base 10, a vertical hollow cylindrical body 11 mounted thereon, and a motor 12 mounted on the upper end of the body. As shown in Figure 1, integral ears 13 on the upper outer surface of the body 11 are provided for securing the motor in place.

As shown in Figure 2, the base includes a pump housing 14 which encases an impeller 15, the latter being mounted on the lower end of a downwardly extending motor shaft 16. Immediately below the housing 14 the base includes an enlarged circular cavity 17 for receiving a disk-shaped housing bottom 18 which fits against a shoulder 19 between said cavity and said hous- Patented Sept. 8, 1959 ice ing. A groove 20 is formed around the wall of the cavity 17 for receiving a locking ring 21, preferably of stainless steel. Similarly, the depending motor shaft 16 is preferably of stainless steel, but may be coated with a synthetic resin or other non-corrosive protective material, such as paint or lacquer.

The base 10, housing bottom 18 and body 11 are of moldable synthetic resin, preferably of the polyamide group and it has been found that polyethylenes are particularly suitable since they are not subject to cracking due to sharp blows or sudden temperature changes.

Other details of the pump shown include slotted integral lugs 22 on the upper surface of the pump housing 14 for receiving portions of the lower periphery of the body 11, inlet port 23 in the lower wall of said body, and a housing inlet 24 which is an enlarged circular opening in said housing around the motor shaft 16. There is a tangential discharge port 25 in the side of the housing 14.

The impeller 15 shown may be stamped from a single sheet of metal, preferably of non-corrosive metal such as stainless steel, or may be of molded non-corrosive material. In the event the impeller 15 is molded of non-metallic material, the hub thereof (not numbered) would be relatively thick so as to resist flexing and breaking.

It is to be noted that the base 10 is relatively wide as compared with the height of the unit; accordingly, for most purposes, it is not required that the base be secured to the bottom of the tank in which the unit operates. It is also pointed out that the assembly of the disk housing bottom is capable of quick and convenient installation, and that the unit as a whole will resist corrosion due to chemicals found in water ordinarily used in evaporative coolers.

The invention is not limited to the exemplary construction herein shown and described, but may be varied within the scope of the appended claim.

What is claimed is:

A pump comprising a horizontal base, a vertical cylindrical hollow body thereabove, a motor mounted on the upper end of said body and having the axis thereof in axial alignment with the axial center of said body, a circular pump housing in said base and a circular cavity in said base beneath said housing, the diameter of said cavity being larger than the diameter of said housing providing the shoulder therebetween, a disk-shaped housing bottom positioned against said shoulder, a groove in Wall of said circular cavity, a locking ring in said groove and bearing against the lower surface of said disk-shaped housing bottom, an impeller within said pump housing, a vertical shaft connecting said motor with said impeller, slotted integral lugs on the upper surface of said pump housing receiving portions of the lower periphery of said body, inlet ports in said body between said lugs, a circular inlet in said housing around said shaft, and a tangential discharge port in the vertical wall of said pump housing.

References Cited in the file of this patent UNITED STATES PATENTS 2,098,621 Gollnick Nov. 9, 1937 2,701,529 Finzel Feb. 8, 1955 2,747,513 Atkinson May 29, 1956 2,782,720 Dochterman Feb. 26, 1957 2,791,182 Scheidl May 7, 1957 2,884,863 Hartmann May 5, 1959