Pump

March 7, 1939. a. g horvath 2,149,602 .PUMP' '

Filed Dec. 2^ 1937 2 Sheets-Sheet 1

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2ΓΓΤΟ#Ν£Ύ·5

March 7, 1939. a. g horvath 2,149,602

PUMP

Filed Dec. 24, 1937 .2 Sheets-Sheet 2

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Patented Marl 7, 1939

2,149,602

UNITED STATES PATENT OFFICE

2,149,602 . ' PUMP ' . . .

Anthony G. Horvath, Dayton, Ohio, assignor to

The Dayton Pump &amp; Mfg. Co., Dayton, Ohio, a corporation of Ohio

Application December 24, 1937, Serial No. 181,504

Claims.

This invention relates to fluid dispensing •equipment and particularly to gasoline filling station equipment.

. The object of this invention is to provide a L y. -motor driven pump the motor Of which is remote from the pump, the pump being located in an : underground tank. '

It is an Object of this invention to provide in such aii arrangement a pump that is self-priming, ! κι that does hot pump air, and in which the valve construction may permit slight leakages without rendering the pump inaccurate in service.

It is an object to provide such a valve arrangement in association with the pump in the remote _: burled tank so that stich a valve does not need frequent repairs and, when it wears, the slight leakage resulting will not be serious.

It is a further object to provide in such an ar^; rangement a valve control that is readily accessi20 ble and can be located in the motor pit where it can be readily reached. Such a valve is utilized to prevent the draining of gasoline back between the tank and pump.

ⁿ further object to provide a third valve 2.7 which is also accessible that relieves the pressure beyond the check valVe just mentioned into the interior of the tank through the space between the impeller and the impeller shaft pipe of the pump. This arrangement makes the relief valve inaccessible for adjustments to different pressures.

By placing the pressure relief valve adjacent·:a location in the discharge line outside of the storage tank and remote therefrom, the various advantages indicated result.

.- Referring to the drawings, Figure 1 is an elevation with the tank partially in section and with the ground and pump pit in section, showing generally the arrangement of the apparatus.

Figure 2 is a detail section from a point just 4 o below the motor to the bottom of the pump.

^: Figure 3 is a detail elevation of the motor and the upper part of the pump and valve construction showing the upper pressure relief check valve and associated valve mechanism.

Figure 4 shows in detail a section through the pump and the primary check valve, which prevents the flow back of fluid and prevents the pumping of air.

Figure 5 is a section through the pump to show 50 its nature on the line 5—5 of Figure 4.

Referring to the drawings in detail, I is the ground on which is mounted a concrete platform 2, formed into a concrete pit 3 in which is mounted the motor and a portion of the top of the

Piping, etc. On top of the ground is mounted the (Cl. 103—42) dispensing apparatus 4 and 5 having the usual dispensing hose and nozzles 6 and 7. Such hose and nozzles 6 and 7 are fed by the pipes 8 and 9 which are connected to the outlet 10 of thp pump mechanism hereinafter; described. An actuating motor 11 is brought into electrical circuit through the wires 12 and 13 by the lifting of the nozzle 6 or 7 from the switch 14.

When this takes place the motor is brought in circuit and rotates its armature shaft 15 and in ₁₀turn the impeller shaft 16. Around this impeller shaft Is a spring packing 17 to seal the shaft from ; the passage of lubricant 18 in the lubricant chamber 19. This shaft is hollow. It is connected at its lower end by the keys 20 to the pump impeller _]5shaft 21 on which are mounted the impellers 22 of the pump that travel inside of the stator guides 23 of any conventional centrifugal pump. The bottom, of the pump impeller shaft rides upon a ball bearing 24. The tank 25 in which this pump is submerged contains the gasoline 26 that enters through the strainer 27 into the bottom of the pump and its casing 28 which supports the stator guides 23.

At the top of this pump there is a partition 29 having ports 30 that are closed by the pump pririiary check valve 31 that is spring pressed downwardly by the spring 32. The pressure of the fluid pumped by the pump lifts this check valve. When the pump stops, the spring plus any pressure of on fluid above the pump closes the valve. This pre; vents the pump from pumping air. The port 30α is used for evacuating the air from the pump as it. provides a means of escape for the entrapped air so that the pump will pump, primarily, the liquid ,which in turn lifts the valve 31. If there are any ^d5slight inaccuracies in the valve, such leakages as result are small and not serious. Therefore it is .seldom necessary .to have access to this remote valve. The fluid so pumped is pumped through the port 33, upwardly through the pipe 34 through ⁴⁰a space 35 formed by the pipe 34 and the inner pipe 36, the function of which consists of a protection for the drive shaft 16 and for other purposes hereinafter specified. The gasoline so as pumped travels to the top of the pipe 34 through the space 35, whence it turns at right angles into the chamber 37, and thence passes into the laterally disposed valve chamber 38 within the casing 39. The pressure lifts the valve 40 which is ro- sn tated by the wings 41 and is limited in its upward movement by the stud 42. The gasoline passes into the chamber 43 and thence out the discharge opening 10 to be dispensed as hereinafter described. This second valve is a check valve to gg

3,149,602 prevent the draining of gasoline from the dispensing pumps back to the tank and is accessible. It is located within the pit 3 and can be readily adjusted for accuracy by removing the screw plug 5 42α. The opening thus uncovered by removing the screw plug 42α is larger than the valve 40 so that it can be readily removed, adjusted and replaced. A spacing pipe 60 extends between an upper collar 61, fastened to the casing 39, and 10 a lower collar 62 surrounding the opening in the tank 25, such spacing pipe serving through said collars to connect the casing 39 with the tank, and acting as a protecting covering for the pipe 34 between the tank and casing.

The third valve construction which is one of the essential features of this pump is the check valve 44 which is normally spring pressed downwardly by the spring 45. Access to this valve is secured by removing the plug 46. This valve is 20 located to control the passage of fluid through the passageway 47 leading from the chamber 37 and the passageway 48 leading from the chamber 49. This chamber 49 communicates with the space 50 formed between the tube 36 and the drive shaft or 25 tube (6. The bottom of this space 50 communicates with the drain opening 5i for the return of gasoline to the tank 25. By adjusting the screw plug 46 and the compression of spring 45, an accurate adjustment can be effected readily from 30 within the pit 3 to regulate the pressure of delivery by the pump so that any excess over that pressure will be relieved by the relief valve 44 returning the by-passed gasoline back into the tank. This pressure relief valve may be located beyond 35 valve 40 so that the by-pass pressure will return from chamber 43 into the space 50 or it may be arranged as indicated.

It will be understood that it is desired to comprehend within this invention such modifications 40 as come within the scope of the claims and the invention.