US2111852A

US2111852A - Automatic filling nozzle

Info

Publication number: US2111852A
Application number: US158288A
Authority: US
Inventors: Henry K Flinchbaugh
Original assignee: Individual
Current assignee: Individual
Priority date: 1937-08-10
Filing date: 1937-08-10
Publication date: 1938-03-22
Anticipated expiration: 1955-03-22

Description

March 22, 193s.

H. K. ELINCHBAUGH 2,111,852

AUTOMATIC FILLING NOZZLE 'Filel Aug. 1'0, 1937 2 sheets-sheet 1 ATTORNEYS.

-|11. K. FLINCHBAUGH 2,111,852

AUTOMATIC FILLING NOZZLE v March 22, 193s.

Filed Aug. lo, i957 2 Sheedzz-s-ShevetY v22 FIC- W.

[NVE/WOR.b ng h. Flin/bbw 1 `r @and ATTORNEYS.

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Patented Mar. 22,l 1938 UNITED .STATES PATENT OFFICE 8 Claims.

My invention relates to automatic valves and particularly to ones which are actuated to close by the submergence of the nozzle end' in the liquid which has been discharged into a receptacle.

Still more specically, my invention is concerned with automatic valves for gasoline dispensing nozzles which automatically stop the flow of 4gasoline when ,the gasoline in the container being filled submerges the end of the dispensing nozzle.

l0 This invention is a modication of my previous invention shown in my applications for United States Letters Patent tiled September 16, 1936,

Serial No. 101,022, and the present application is a continuationI in part of the said earlier application as to all common subject-matter. Accordingly the principal object of my present invention is the provision of a simple and positively operating automatic valve for the nozzle of a gasoline dispensing unit, which can'be depended upon to shut off the flow of gasoline when the end of the nozzle becomes submerged. Other objects and advantages will appear from the following'detailed description of a preferred embodiment of4 my invention, reference being had to the accompanying drawings.

20 Fig. I of the drawings is a side view of a nozzle and hand valve, partially in section to show the automatic valve of my invention placed in the end. of the nozzle, the automatic valve being open.

FigpII is a side view in section of the automatic valve portion of the nozzle shown in Fig. I, with the automatic valve closed.

Fig. III is la sectional view taken on the line III- III of Fig. I. Fig. IV is a sectional view takenon the line Je Iv-IV of Fig. I. j

Fig. V is a perspective view of the closure valve. Fig. VI is a perspective view of the operating cylinder in which the stem of the closure valve moves.

Fig. VII is a perspective view of the spray control tube positioned at the end of the nozzle. Fig. VIII is a perspective view of the internal nozzle/positioned between the spray control tube and the operating cylinder mentioned above.

Fig.' IX is a perspective view of the removable end of the operating cylinder having an automatic slide valve formed therein.

For the purposes of a detailed description of the device shown in the drawings, that device may be conveniently analyzed into an outer nozzle l with hand control valve 2, an automatic valve .3 having an operating cylinder 4, an internal nozzle 5 and a, spray control tube 6 separated by an annular recess 1 from said internal nozzle 5.

. ment Il! in or out.

The outer nozzle l and hand control valve 2 are of a conventional type and need not occupy us. The automatic valve 3 has a stem I0 formed integrally therewith and extending into the operating cylinder 4. The valve 3 is formed to cause a convergence of the fluid stream into the internal nozzle 5 in which a valve seat Il is formed. This J convergence makes the internal nozzle 5 the constriction I5.

Extending longitudinally through the valve 3 10 and its stem I0 is a conduit1 I6. 'I'he lower end of the conduit i6'is enlarged to receive in a press fit an adjustment element I1. This adjustment element Il regulates the sensitivity of the valve and this adjustment is Aeffected by moving the ele- '15 The farther the element I1 projects, the greater impediment it is to the fluid stream through the valve 3. When a `greater port-ion of the element I'l is exposed to the pressure -of the fluid stream, it isclear that the resolved force urging the element Il downward 20 against the pressure of the operating cylinder 4 is correspondingly increased. The angle of the uid stream impinging on the element Il causes this resultant downward force. Hence the sensitivity of the automatic operation of the valve 3 may be regulated by varying this resultant force through changing the degree of projection of the element I1.

' On the end of the valve stem ID is a piston I3 which works in the cylinder 4. in an obvious manner. Around the stem l0 is a coil spring I9 urging the piston I8 upward and the valve 3 open.` In order to avoid the danger of uid collection in the cylinder Il, drainage conduits 20 are provided leading into conduit i6.

. At the upper end of the cylinder 4 is a head 23 in threaded engagement with the cylinder I. This head 23 is shown in perspective in Fig. IX. In the head 23 is formed an inlet conduit 25 communicating with the cylinder 4 as will be hereinafter explained. A slide valve 28 slides in conduit 29 at the bottom of which isiormed a valve seat 3i). From the lower part of valve 28 a stem 3i depends and extends through a conduit 32 into 45 cylinder 4,. resting on top of valve stem I0. The bottom portion of stem 3| is formed as shown in' Fig. IX with a flattened end in order to avoid interfering with the free ow of liquid through .conduit I6 in stem I0. The stem 3| ilts very loosely in conduit 32 in order to permit the free flow of liquid therethrough when the conduit 25 is open. i

The cylinder 4 `is held in position by radially extending segments 34, permitting the free flow of liquid through the spaces between the seg ments 36. At the bottom of each segment, ports 35 are formed, with conduits 36 connecting the ports 35 to the spaces between the segments liti. The cylinder ll is shown in perspective in Fig. VI.

These ports 35 prevent air pockets from forming during the flow of liquid through the closure valve 3, and the interference with the proper functioning of the device caused by such air pockets. Thus, there is in' eiect one solid stream through closure valve 3 instead of three separate ones from the spaces between segments 34.

The internal nozzle t is constricted by the bevel form of the-valve 3 as explained above and its discharge side is flared to direct the fluid stream over and without touching the annular recess 'l before hitting the wall of spray control tube t at points fr0. The discharge side of the tube Ei is also constricted by a converging wall to eiect a good fluid discharge. Two air ports 3B are formed between the inside of the outer nozzle i and the outside of the spray control tube ii, see Fig. III. These ports 38 lead from the end of the outer nozzle i to the annular space l between the spray control tube 5 and the internal nozzle Ei. The function of these air ports 3d is that of breathers which induce the 'luidistream discharged froml the internal nozzle 5 to follow its natural course over the annular recess l without filling up the clearance space between the stream and the spray control tube 6 at its inner end. Dotted lines in Fig. I indicate the normal course of the iluid stream from inner nozzle 5.

From the above it will be seen that the flow of liquid through the outer nozzle i is restricted at the oonstricted portion of the internal nozzle t, consequently forcing the liquid through by pressure. The lower or outer end of the internal nozzle t is tapered allowing the liquid to spread and to that degree guiding the spread of the flow to contact the spray control tube t at points till creating an air chamber around the annular recess l that has ports 33 to allow the how of liquid its natural breathing of air as it spreads. As the liquid flows through the internal nozzle ii it is also ilowing through the conduit 25 into a pressure chamber il of the cylinder d, out through the conduit it in the valve stem il! and the valve 3, continuing through the adjustment element il into the center of the main ilow of liquid.

As the pressure increases or decreases in the vouter nozzle I the ow of liquid through the internal nozzle 5 and through the adjustment element Il also increases ordecreases with the pressure. It is to be noted that ythe conduit in element l'l is of a smaller cross sectional area than that of the conduit i6 and hence this adjustment element I1 is effective as a small nozzle at the end of conduit i6. Now as the flow of liquid increases through the adjustment element i'l the flow of liquid that encircles the element Il increases, increasing the pull of the liquid exhaust of the pressure chamber 4| out through the conduit IB. This creates a more uniform pressure in the pressure chamber lll, thus creating a Wider range of operating pressures of the automatic shut-olf nozzle than exists in the pump installations now in use.

The automatic shut-011 ltakes place when the liquid in the container being lled reaches the discharge end of outer nozzle` I closing oil' the air ports 38 from the atmosphere which cuts oii" the air that is being breathed in by the ilow of liquid spreading as it ilows out of the internal atmete duit 25 and completing the automatic shut-off.

To reopen

valves

3 and 28, the hand control valve 2 is closed which relieves the pressure on the valves 3 and 2d and permitsv them to be lifted from their respective seats il and 3i) by the pressure of the spring i9 to their normal position.

The adjustment element i7 is held by a press fit which can be moved to extend out of the valve t to a variety of lengths, which counteracts the pressure of the valve spring by the ow of liquid contacting the surface oi the sides of the adjustment element il from the angle of the flow at that point. This creates an adjustment Iof the sensitivity of the automatic valve by the amount of the surface of the element il' exposed to the flow.

While I have described this preferred embodiment of my invention in detail, it is obvious to one skilled in the art that numerous changes might be made and such modications are deemed to be within the spirit of the invention as hereinafter claimed.

Having thus described my invention, claim:

1. The combination of an outer nozzle. a closure valve within said nozzle, a closure valve stem, a conduit formed in said valve and valve stem longitudinally thereof, a pressure means urging said valve open, a closing piston attached to the end of said valve stern, an operating cylinder in which said piston operates, said cylinder having an inlet port at the supply end of said cylinder, a control valve closing said inlet port when said closure valve is in the closed position, an internal nozzle into which said closure valve opens, a spray control tube positioned at the discharge end of said internal nozzle and extending to substantially the end of said outer nozzle, and an air duct leading from the end of said outer nozzle to a point between said inner nozzle and said spray control tube.

2. The invention of claim l wherein the opera ating cylinder is supported within said outer nozzle by radially projecting portions having dis- .charge ports formed in the ends of said radially 4. The invention of claim 1 wherein an adjustment member is positioned at the discharge end of said conduit formed longitudinallyin said closure valve and valve stem, said adjustment member having capacity for adjustment longitudinally of said valve stem.

5. The invention oi.' claim l wherein said internal nozzle and said spray control tube are separated from each other by an annular recess.

6. l'I'he invention offc'laim 1 wherein said control valve is of the sliding type and has a depending stem connected to the valve piston and which rests on said closure valve stem vfollowing the movement thereof.

'7. In combination, an outer nozzle, a closure j l guasta 3 valve within said nozzle, a pressure means foresure from said closing piston, when said closure lng said valve open to allow uidvsdischarse past valve is closed.

said valve, a closing piston within said nozzle and 8. The invention of claim 7 wherein the exnormally exposed to the iluid pressure in said haust duct has an adjustable projecting nozzle 5 nozzle, an exhaust duct leading through said element attached toits lower end, the crossclosure valve and discharging centrally into vthe sectional area of said nozzle being smaller than stream of liquidflowlng past said closure valvel ,that of said exhaust duct and a control valve for cutting ol! said iluid pres- HENRY K. FLINCHBAUGE.