US3181796A

US3181796A - Spray pump

Info

Publication number: US3181796A
Application number: US291752A
Authority: US
Inventors: Keller Paul
Original assignee: Cornelius Co
Current assignee: Cornelius Co
Priority date: 1963-07-01
Filing date: 1963-07-01
Publication date: 1965-05-04
Anticipated expiration: 1982-05-04
Also published as: DE1958413U; GB1055733A

Description

May 4, 1965 P. KELLER 3,181,796

SPRAY PUMP Filed July 1, 1963 2 Sheets-Sheet 1 INVENTOR.

Rzal Kai er A TTORNEYS y 4, 1965 P. KELLER 3,181,796

SPRAY PUMP Filed July 1, 1963 2 Sheets-Sheet 2 ivy-'5 a4 37 1 5O z I L as i INVENTOR.

-Paa Hex er Z i TOM EYS United States Patent 3,181,796 SPRAY PUMP Paul Keller, Coon Rapids, Minn., assignor to The Cornelius Company, Anoka, Minn., a corporation of Minnesota Filed July 1, 1963, Ser. No. 291,752 6 Claims. (Cl. 239-216) This invention relates generally to a spray pump, and more specifically to novel structural features thereof.

The term spray pump as used herein refers to a member which is rotated about its axis with its lower end inserted in a sump so that liquid in the sump is drawn by centrifugal force along a surface of such pump or member to a point Where such liquid is centrifugally discharged or sprayed.

The present invention is directed tospecific structure for such a pump by which the same is more efficiently manufactured and operated. In particular, where such a pump is made hollow for internal liquid flow, it is necessary to provide a discharge aperture, and it is desirable that such member be so constructed that access may be had to the interior thereof for cleaning. Further, in operation, it has been noted that the effect of inertia on liquid in the sump has been such as to lessen the efiiciency of the pump.

Accordingly, it is an object of the present invention to provide an improved structure for a spray pump.

A further object of the present invention is to provide structure which may be readily assembled and disassembled for cleaning without use of tools.

A still further object of the present invention is to provide structure by which the discharge aperture is accurately provided.

Yet another object of the present invention is to provide a connection between portions of the pump for holding such portions together, such connection serving the further function of defining the liquid discharge aperture.

Another object of the present invention is to provide spray pump structure by which liquid which has been picked up will be more efiiciently propelled.

Yet another object of the present invention is to provide structure by which liquid in the sump which has not been picked up will be precluded from moving to efi'iciency-destroying positions.

Many other advantages, features and additional objects of the present invention will become manifest to those versed in the art upon making reference to the detailed description and to the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

On the drawings:

FIGURE 1 is an elevational view of a spray pump which is provided in accordance with the principles of the present invention;

FIGURE 2 is an enlarged fragmentary view of a portion of FIGURE 1;

FIGURE 3 is a cross-sectional view taken along line III-III of FIGURE 2; V

FIGURE 4 is an enlarged fragmentary cross-sectional view taken along line IVIV of FIGURE 2; and

FIGURE 5 is an enlarged cross-sectional view taken along line V-V of FIGURE 1.

As shown on the drawings:

The principles of this invention are particularly useful when embodied ina spray pump for a liquid, such as water, such as the pump illustrated in FIGURE 1, generally indicated by the numeral 19. The spray pump includes a hollow member 11, a cap 12, a detachable connection 13 between the member 11 and the cap 12, a motor 14 having a driving connection with the cap 12, and a liquid sump generally indicated at 15.

The hollow member 11 has an apertured lower end 16 extending into the sump 15, and into which liquid may flow by gravity. The interior of the hollow member 11 includes an upwardly diverging interior conical surface 17 which emerges with a larger diameter interior surface, such larger diameter interior surface here including a further conical surface 18 and a cylindrical surface 19. Surrounding the interior conical surface 17, there is an external cylindrical surface 20 which also extends into the sump 15 and which is of such length as to extend upwardly from liquid therein. At the larger diameter interior surface, and near the upper end thereof, there is provided a number of liquid-discharge apertures 21 which communicate with the interior surface 18, the aperture 21 in FIGURE 1 being illustrated as being at the upper edge of the cylindrical portion or surface 19.

The cap 12 is cup-shaped and opens in a downwardly directed direction so that it receives the upper cylindrical portion 22 of the member 11. The upper or closed end 23 of the cap 12 thus closes the upper end of the larger diameter interior surface and prevents upward escape of liquid. The closed upper end 23 of the cap 12 further comprises the means by which the member 11 is supported and rotated.

The motor 14 has a shaft 24 which rigidly supports a flange 25 to which the cap 12 is secured as by a pair of screws 26, 26 (FIGURE 3) for corotation.

In operation, the motor 14 acting through the shaft 24, the flange 25, and the cap 12, drives or rotates the member 11 about a vertical axis with its lower end projecting into a liquid in the sump 15; Rotation of the conical surface 17 imparts rotational movement to liquid therein, thereby providing a centrifugal force thereto. Under the influence of such centrifugal force, the liquid within the conical surface 17 is directed against the conical surface 17, and because of the slope thereof, such liquid is caused to flow upwardly in a diverging manner along the conical surface 17, the larger diameter surface 18, and the larger diameter surface 19. In its upward flow, the centrifugal force is increased owing to the increase in length of moment arm, the liquid ultimately being discharged as a flow or spray through the aperture 21.

The liquid sump 15 includes a reservoir or tray 27 V which receives a quantity of liquid. Due to surface tension, there is a tendency for liquid to rise along the outer surface of the member 11. Therefore, and to preclude such movement, the cylindrical exterior surface 20 serves as a trap to prevent upward escape of liquid from the sump. If the liquid were allowed to flow upwardly along' the exterior of the member 11, it would be flung therefrom at a point below the level or height of the aperture 21, whereby there would be little or no control as to the point of impingement or the direction in which the spray is directed. The external cylindrical surface 20 thus serves to prevent a liquid loss or etficiency loss due to an unwanted secondary type pumping.

- The sump 15 further includes stationary baflle means 28, 28 disposed in the liquid, and extending radially to the cylindrical surface 20. There is a tendency for the cylindrical surface 20 to cause the external water or liquid to spin, and to form a vortex within the sump 15, thereby limiting the height of liquid within the conical surface 17.

Accordingly, the baffle means 28 serve to break up or prevent such vortex formation, thereby producing a level of liquid within the conical-surface 17 which is higher,

and hence more eflicient, than would be the caseif the due to inertia of rest. In order to ensure that the liquid within the conical surface 17 will be provided with a maximum of centrifugal force, there is provided further baflie means 29, 29 within the conical surface 17, the bafile means 29 being supported by the member 11. The baiiie means 29, as best seen in FIGURE 5, comprise a pair of elongated fins or paddles which carry the liquid along rotationally so that the centrifugal force present within the conical surface 17 is applied to a maximum volume of the liquid therein. The structural detail of the baffle means 29 is exemplary, and the baflle means 29 may be constructed in any particular manner which will ensure such corotation of the liquid with the conical surface 17.

The connection 13 which joins the member 11 to the cap 12 is detachable, is preferably of the bayonet type, and preferably also defines the liquid discharge aperture 21. To that end, as best seen in FIGURES 2 and 3, the wall 30 of the cap 12 is provided with means which defines a slot 31, the slot 31 extending in a direction parallel to the rotational axis of the cap 12, and extending through the wall 30. At the upper end of the slot 31, there is a branch portion or slot 32 defined in part by a ramp or cam 33, the slot 31 extending upwardly into the interior surface of the closed end 23 of the cap 12. The member 11 has an ear 34 which is rigid therewith. The ear 34 is of such width as to be freely slidably receivable in the slot 31 when the member 11 is inserted into the cap 12. Thereafter, relative rotation between the cap 12 and the member 11 directs the ear 34 into the branch portion or slot 32, the ear 34 coacting with the ramp or cam 33 to draw the member 11 upwardly into the cap 12 in tightly seated relation to the inner surface of the closed end 23 thereof. By reversing these movements, the member 11 and the cap 12 may be disassembled for cleaning.

As shown in FIGURE 3, there are preferably provided three such slots 31 which may be uniformly spaced. The upper end of each of the slots 31, as best seen in FIGURE 4, comprises a recess 35 which opens into the inner surface 36 of the closed end 23 of the cap 12, which extends adjacent to the upper end of the member 11, and which opens radially outwardly to define the upper and the lateral edges of the aperture 21. The lower edge of the aperture 21 is defined by the upper edge of the member 11 which seats firmly against the interior end surface 36. An annular groove 37 in the interior surface 36 adjacent to the upper edge of the member 11 receives liquid from the larger diameter surface 19 and communicates such liquid to the various recesses 35.

Where the cap 12 is produced by molding, the slot 31 is formed by a pin having a cylindrical configuration. Where the slot 31 is to be performed by machining, it may be made by a circular cutter or borer. Such production tool is so disposed that it projects through or breaks through the wall 30 to define the slot 31, and such tool projects axially beyond the plane of the surface 36 to provide at the end of the slot 31, the recess 35 which is nearly circular. The cap 12 has a skirt or flange 38 of increased external diameter through which such production tool would extend to define a circular opening 39, thereby providing clearance for movement of the ear 34 therethrough.

Thus, the ear 34 and the slots 31, 32 provide a detachable bayonet connection between the member 11 and the cap 12, the slot-defining means 31 further defining the recess 35 by which the liquid discharge aperture 21 is provided. The cam or ramp 33 thus acts on the ear 34 to bring the upper edge of the member 11 into seating engagement with the surface 36, thereby controlling or closely regulating the effective size of the aperture 21.

Although various minor modifications might be suggested by those versed in the art, it should be understood that I wish to embody within the scope of the patent warranted hereon all such embodiments as reasonably and properly come within the scope of my contribution to the art.

I claim as my invention:

1. A spray pump comprising:

(a) a hollow member;

(12) said member having an apertured lower end with an upwardly diverging interior conical surface for being disposed in a liquid;

(0) said member having a larger diameter interior surface with which said interior conical surface communicates and extending upwardly therefrom;

(d) a cap adapted to be rotatably driven and closing the upper end of said larger diameter surface; and (e) means comprising a bayonet connection between said member and said cap, said connection constructed as to define a radially directed liquid-discharge aperture.

2. A spray pump comprising:

(a) a hollow member;

(b) said member having anapertured lower end with an upwardly diverging interior conical surface for being disposed in a liquid;

(c) said member having a larger diameter interior surface with which said interior conical surface communicates and extending upwardly therefrom;

(d) a cup-shaped cap adapted to be rotatably driven, and receiving and closing the upper end of said larger diameter surface;

(6) means defining a slot extending through the wall of said cap and extending in an axial direction beyond said member, said slot having a branch portion extending transversely to said direction, said slot-defining means and said member jointly defining a radially directed liquid-discharge aperture; and

(1) an ear rigid with said member and movable through said slot into said branch portion to form a detachable connection between said member and said cap.

3. A spray pump comprising:

(a) a hollow member;

(e) means defining a slot extending through the wall of said cap, and extending in an axial direction beyond said member, said slot-defining means and said member jointly defining a radially directed liquiddischarge aperture;

(f) means defining a branch slot extending transversely to said direction but sloping toward said upper end; and

(g) an ear rigid with said member and movable through said slot into said branch slot to form a detachable connection between said member and said cap, said ear being cammable by said branch-slot defining means to effect partial closing of said liquid-discharge aperture to a predetermined size.

4. A spray pump comprising:

(a) a hollow member;

(b) said member having an apertured lower end with an upwardly diverging interior conical surface for being disposed in a liquid;

(d) a cup-shaped cap adapted to be rotatably driven, and receiving and closing the upper end of said larger diameter surface; and

(e) means defining a recess in the inner side .of the closed end of said cap, said recess extending radially enemas past said upper end of said member and through the wall of said cap to define with said upper end a liquid-discharge aperture communicating with said larger diameter interior surface of said member.

5. A spray pump comprising:

(a) a hollow member;

(e) means defining a plurality of recesses in the inner side of the closed end of said cap, each of said recesses extending radially past said upper end of said member and through the wall of said cap, said recesses defining with said upper end a corresponding plurality of liquid-discharge apertures; and

(1) an annular groove in said inner side of said cap adjacent to said larger diameter interior surface, and connecting said recesses together.

6. A spray pump comprising:

(a) a hollow member;

(b) a said member having an apentured lower end with an upwardly diverging interior conical surface for being disposed in a liquid;

(c) said member having a larger diameter interior sur- 6 face with which said interior conical surface communicates and extending upwardly therefrom;

(e) means defining a slot through the wall of said cap terminating in a recess in the inner side of the closed end of said cap at said upper end of said member, said recess and said upper end jointly defining a radially directed liquid-discharge aperture;

(f) means defining a branch slot extending transversely to and connected with said slot; and

(3) an ear rigid with said member and movable through said slot into said branch slot to form a detachable connection between said member and said cap.

References Cited by the Examiner UNITED STATES PATENTS 1,864,797 6/32 Braemer 239-2l5 2,149,921 3/36 Lea 239217 2,157,416 5/39 Kjos 239216 2,766,071 10/56 Flury 239-217 3,110,748 11/63 Myklebust 239216 FORElGN PATENTS 523,157 3/56 Canada. 860,708 12/52 Germany.

LOUIS J. DEMBO, Primary Examiner.

3O EVERETT W. KIRBY, Examiner.

Claims

1. A SPRAY PUMP COMPRISING: (A) A HOLLOW MEMBER; (B) SAID MEMBER HAVING AN APERTURED LOWER END WITH AN UPWARDLY DIVERGING INTERIOR CONICAL SURFACE FOR BEING DISPOSED IN A LIQUID; (C) SAID MEMBER HAVING A LARGER DIAMETER INTERIOR SURFACE WITH WHICH SAID INTERIOR CONICAL SURFACE COMMUNICATES AND EXTENDING UPWARDLY THEREFROM; (D) A CAP ADAPTED TO BE ROTATABLY DRIVEN AND CLOSING THE UPPER END OF SAID LARGER DIAMETER SURFACE; AND (E) MEANS COMPRISING A BAYONET CONNECTION BETWEEN SAID MEMBER AND SAID CAP, SAID CONNECTION CONSTRUCTED AS TO DEFINE A RADIALLY DIRECTED LIQUID-DISCHARGE APERTURE.