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Publication numberUS3029744 A
Publication typeGrant
Publication dateApr 17, 1962
Filing dateMay 24, 1960
Priority dateMar 8, 1957
Publication numberUS 3029744 A, US 3029744A, US-A-3029744, US3029744 A, US3029744A
InventorsGoettl Albert B
Original AssigneeMc Graw Edison Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Impeller housing
US 3029744 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

April 17, 1962 A. B. GQETTL IMPELLER HOUSING Original Filed March 8, 1957 m m m m ALBERT B. GOETTL The present invention relates to an impeller housing and more particularly to an impeller operable in connection with small fractional horsepower electric motors for pumping liquid.

The present application is a division of my copending application Serial No. 644,897 for Impeller filed March 8, 1957, now Patent No. 2,952,213.

In the manufacture of evaporative coolers, pumps are used to force water from the sump in the bottom of the cooler to manifolds or distributors which direct the water into troughs at the upper edges of the evaporative cooler pads. .In these coolers small high speed electric motors are used and it is desirable to operate pump impellers in direct connection with shafts of such motors in order to provide for the construction of a very economical pump.

It is an object of the invention to provide a pump having a very simple housing, pump inlet, screen and supporting structure which is very simple and economical to produce, assemble and maintain.

Another object of the invention is to provide a pump housing and inlet screen wherein resilient shoes are frictionally engaged with legs on the housing and the shoes retain the screen in position relative to the housing and also support the entire assembly in spaced relation from the bottom of a liquid sump.

Other objects and advantages of the invention may be apparent from the following specification, appended claims and accompanying drawings in which:

FIG. 1 of the drawing is a fragmentary side elevational view of a pump having the impeller of the present invention mounted therein and showing portions of the pump housing in section;

FIG. 2 is a bottom plan view of a pump showing the impeller of the present invention mounted therein and showing portions of the pump housing broken away to permit a full view of the impeller in connection with the end of a motor shaft and;

FIG. 3 is an enlarged fragmentary sectional view taken from the line 33 of FIG. 2.

As shown in FIG. 1 of the drawing the pump which houses the impeller of the present invention is located in a sump wherein liquid 10 is being transferred from a sump through a conduit 12 to a use location.

, The conduit 12 extends from a centrifugal pump housing 14. The conduit 12 serves as an outlet which com- 18, 19, and 23. These shoes are provided with an envelope portion which fits over the legs 17 and grips them frictionally due to the resilient character of the shoes which may be made of any suitable material such as plastic, rubber, or any other synthetic material. Each of the shoes is provided with an inwardly extending toe portion such as the toe portion of the shoe 17 and these toe portions extend under a cup shaped screen which covers the lower side of the pump housing member 26 wherein a central opening 24 thereof communicates with the inlet of the pump impeller 30.

As shown in FIG. 3 of the drawings the pump housing 3,029,744 Patented Apr. 17, 1962 member 26 is provided with a flange which is fixed to the lower inner side 15 of the pump housing 14 while a housing support 46 is provided with a flange 48 secured to the upper side 13 of the housing 14. The flanges 27 and 48 may be secured to the housing 14 by rivets or any other suitable means as desired. The support 46 may be secured to the supporting frame structure or may be mounted on a motor which drives the shaft 28 in connection with the impeller 30.

The opening 24 of the housing 26 is concentric with a motor shaft 28 which supports the impeller 30 of the present invention. The opening 24 is smaller than the outside diameter of the area traversed by the impeller 30. As shown in FIG. 2 of the drawings the motor shaft is provided with a diametrically disposed slot 32 which is open at the end of the shaft and extends axially thereof. Positioned in this slot 32 is the middle portion of a flat piece of sheet metal which forms the impeller 30. Opposite sides' of this fiat piece of sheet metal are parallel to the axis of the shaft 28. This flat piece of sheet metal at opposite ends of the slot 32 is wound tightly around the shaft for substantially degrees and each end of the fiat piece of sheet metal extends in a flat spiral directed around the shaft and outwardly thereof in progressively curved configuration.

It will be noted that when the impeller 30 is formed, portions 34 and 36' which are contiguous with the shaft 28 for substantially 180 degrees are formed slightly closer together than the over all diameter of the shaft. Thus, the middle portion 35 of the impeller if fitted in the slot 32, the arcuate portions 34 and 36 frictionally engage the outer sides of the shaft 28 and tend to force the bifurcated portions of the shaft toward the middle portion 35 of the impeller whereby it is held securely in the slot 32 and around the periphery of the shaft near the end thereof, all as shown best in FIG. 2 of the drawings.

The shaft 28 and impeller 30 rotate in the direction as indicated by the arrows in FIG. 2 of the drawings whereby the spiral configuration of the impeller tends to wind tightly about the shaft when loaded. The load of fluid on the outwardly directed flat spiral portions of the impeller tend to tighten the arcuate portions 34 and 36 against the sides of the shaft and to squeeze the bifurcated portions of the shaft toward the middle portion 35 of the impeller which is fitted in the slot 32.

In operation, rotation of the impeller by the shaft 28 causes centrifugal action of liquid in the housing 26 whereby water enters the opening 24 in the housing and is dispelled outwardly through the conduit 12.

Due to the spiral configuration of the impeller centrifugal displacement of liquid from the shaft to the outer ends 38 and 40 of the impeller requires a greater amount of revolution on the part of the shaft than would be required for a straight radial vane type impeller. It will be seen that as the shaft 28 rotates the impeller forces water centrifugally but only permits the Water to move outwardly within the limits of the spiral configuration at sides 42 and 44 of the outwardly extending spiral portions of the impeller. Thus, the impeller, due to its flat spiral configuration tends to act as a centrifugal impeller and at the same time has the effect of a reduction gear between the high speed fractional horsepower motor and the liquid being pumped thereby.

In operation, the shoes 18, 19, 20 and 21 are frictionally retained upon the legs 17 of the housing 14 and firmly hold the screen 22 in position. However, when the screen 22 becomes encrusted with minerals the shoes may readily be removed from the legs 17 to permit cleaning of the screen and replacement thereof. The toes 25 of the shoes support the screen in spaced relationship relative to the sump bottom 16.

It will be obvious to those skilled in the art that various modifications of the present invention may be resorted to in a manner limited only by a just interpretation of the following claims.

I claim: 7 t

1. In a pump and impeller: a housing for said impeller comprising a substantially cup shaped housing member inverted and having downwardly extending legs; shoes frictionally engaged with said legs and having inwardly directed toe portions extending toward the interior of said housing and a cup shaped screen extending upwardly into said housing and having its bottom portion engaged by the toes of said shoes for holding said screen in said housing.

2. In a pump and impeller: a housing for said impeller comprising a substantially cup shaped housing mem- 'ber inverted and having downwardly extending legs; shoes frictionally engaged with said legs and having inwardly directed toe portions extending toward the interior of said housing and a cup shaped screen extending upwardly into said housing and having its bottom portion engaged by the toes of said shoes for holding said screen in said housing; another housing member secured to the inner side of said inverted cup shaped housing and having an opening therein communicating with the center of said impeller.

3. In a pump and impeller: a housing for said impeller comprising a substantially cup shaped housing member inverted and having downwardly extending legs; shoes frictionally engaged with said legs and having inwardly directed toe portions extending toward the interior of said housing and having its bottom portion engaged by the toes of said shoes for holding said screen in said housing; another housing member secured to the inner side of said inverted cup shaped housing and having an opening therein communicating with the center of said impeller; a pump support secured to the upper side of said first mentioned housing.

4. In a pump and impeller: 21 housing for said impeller comprising a substantially cup shaped housing member inverted and having downwardly extending legs; shoes frictionally engaged with said legs and having inwardly directed toe portions extending toward the interior of said housing and a cup shaped screen extending upwardly into said housing and having its bottom portion engaged by the toes of said shoes for holding said screen in said housing, said shoes disposed to engage the Wheeler May 14, 1957 Tsiguloff Jan.'19, 1960 rim

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2792192 *Oct 20, 1953May 14, 1957North American Aviation IncAircraft fuel pump and tank arrangement
US2921532 *Feb 17, 1956Jan 19, 1960Tokheim CorpSubmerged motor pump
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4735551 *Nov 19, 1984Apr 5, 1988Vaillant Gmbh U. Co.Radial blower
US5584656 *Jun 28, 1995Dec 17, 1996The Scott Fetzer CompanyFlexible impeller for a vacuum cleaner
US5626461 *Mar 26, 1996May 6, 1997The Scott Fetzer CompanyStranded impeller
US5642986 *Mar 27, 1996Jul 1, 1997The Scott Fetzer CompanyFlexible impeller with one-piece hub
US5655884 *Mar 14, 1996Aug 12, 1997The Scott Fetzer CompanyFor a vacuum cleaner
US7220355 *Sep 2, 2004May 22, 2007Adobeair, Inc.Evaporative cooler pump strainer
EP0599204A1 *Nov 18, 1993Jun 1, 1994Grundfos A/SSubmersible pump assembly
Classifications
U.S. Classification415/121.2, 415/206, 222/189.11
International ClassificationF04D13/06, F04D29/44
Cooperative ClassificationF04D29/445, F04D13/06
European ClassificationF04D29/44P, F04D13/06