US1338323A - Fuel-feeding device for vehicles and airplanes - Google Patents

Description

W. H.. MUZZY. FUEL FEEDING DEVICE FOR VEHICLES AND AIRPLANES.

APPLlCATlON FILED DEC. 13, 1917.

1,338,323. .-Papentd Apr. 27, 1920.,-

WITNESSES INVENTOR.

UNITED sT Parana: OFFICE.

WILLIAM H. MUZZY,- F CHICAGO. ILLINOIS, ASSIGNOR TO STEWART-WARNER SPEEDOMETER CORPORATION, OF CHICAGO, ILLINOIS, A CORPORATION OF VIRGINIA.

FUEL-FEEDING DEVICE non VEHICLES Ann YAIRPLANIES.

Specification of Letters ]?atent.. fPatented Apr; 27, 1920.

Application filed Ilecember 13, 1917. Serial No. 206,902. T"

.To all whomz't may concern .5

' a citizen of theIInited States, residing at for Vehicles and Airplanes, of which Chicago, in the county of Cook and State of Illinois, have'invented certain new and use ful improvements inFuel-Feeding DeIviees c eclare the following to be a .-full,- clear, and exact description.

This invention relates to improvements in fuel feeding systems for automobiles or the like and has more particular relation .to improvements in devices of the character shown and described in my co-pending application Ser. No. 206385.for' patent filed on the 10th day of December, 1917 One of the several objects of the invention is to provide improved means in vacuum systems of the type mentioned for intermittently pumping gasolene from the rear main tank to an elevated tank and then admitting atmospheric pressure to the elevatedtank' to allow the gasolene to descend and be fed to the carbureter of the engine. Another object of .the invention is to provide'improved means for cutting off the feed of gasolene from the main tank .to .the elevated tank when the latter is filled to its maximum level and at the same time opening the elevated tank to atmospheric air pressure.

A further object of the invention is to provide means fora correlated operation of parts for stopping the feed of gasoleneto an el'evatedtank. and admitting atmospheric pressure thereto. I I Another object of the invention 1sto ut1- lize the moving volume of fuel between the main tank and the elevated tank to impart a ram like blow to a closing out off and thus snap an atmosphericvalve off its seat against the suction ofthetank, and admit atmospheric pressureto' the tank as th'e cut off closes.-- f

Another object of the invention is to pro vide an improved float and connections in a vacuum tank for governing, without operating, a cut off valve and an atmospheric In carrying these and other objects of the invention into effect I utilize certain con- I structions, combinations and arrangements of parts all of which will be hereinafter more particularly set forth and claimed.

In the accompanying drawings forming part of this specification; Figure 1 represents a central vertical section through a vacuum fuel feeding tank and connections embodying my invention, and

Fig. 2 represents'a detail front elevation of the flap valve.

In general terms the invention may be said to operate by the vacuum created in the manifold of the engine of the machine and which is transferred to my tank to draw the gasolene from a relatively low main fuel tank in intermittent pumping operations as described in mysaid co-pending application and also described in my Patents No. 1,201,- 077 issued Oct. 10, 1916, and No. 1,222,235, issued Apr. 10,1917, and reference is made to these patents for any detail description-of the general operation of tanks ofthistype.

After being drawn into the elevated tank the gasolene is let down intermittently into a lower compartment where itis held under atmospheric pressure and fed to the carbureter of the engine by gravity.

In the aforesaid drawings -1 chamber, 3- the sealing cover of the same, 4

cage.

The-tank 1 is of cylindrical construction and is" providedat its lower end with a fitting; 34 for attachment of the pipe leading tofthe carburetor and adrain cook 35 for drawing ofl sediment and water. The upper end of the tank-is formed with an outwardly turned flange, which is secured to a ring 30 having an air vent passage 27 for admittingtairto the tank 1, The tank 2 at its upper end is also provided with a similar flange which rests upon the flange-of the tank 1, the parts allbeing secured together 7 represents theouter tank or shell, 2the vacuum tank or by screws 28, with a packing washer 29 of cork interposed between the flange of the tank 2 and the top 3. The tank 2 is thus closed air tight. v

The contents of the tank 2 are discharged by gravity through a pipe 31 and a flap valve 32 into the tank 1, the valve 32 being held in position on its seat by headed screws with which the lever contacts when moving in opposite directions. The valve cage 6 screws into the plate 3 and is formed with a-valve seat 22 upon which the valve 8 seats when in its lower positlon and thus prevents any further gasolene passing into the chamber 2. A strainer 21 is secured in the cage 6 by an attaching nut 37 which also forms the attaching member for the pipe which connects it to the main supply tank.

The atmospheric valve 9 is carried by a stem 10 having an elongated slot 12 through which a pin 11, mounted on the lever 17, pro-v jects. The "alve 9 seats upon a valve seat formed in the lower end ofthe cage 5, which latter is screwed into the top 3. The valve 9 normally tends to move upward under the impulse of a coil spring which connects it to an adjusting screw 24 mounted in a disk 23 which loosely sets upon the top action which is like ahammer stroke and can "of the cage. By this means the disk 23 may be rotated andthe tension of the spring 25 adjusted without rotating the valve 9. Ap-

ertures 26 are formed in the'cage'5 to permit the freepasSage of air.

The attachment 4wl1ich is suitably connected to the manifold ofthe engine is pro- 1 vided with a reducing port 16 of much less area than the port covered and uncovered I v {is deliyered it will; be l l derstoo'd. that lthfi" pin 11 moves freely anddu-ickly"iii' thefslot by the valve 9. V

The operation of the parts is as follows:

When the float 14 is in its lower position the .pin 11' contacting with the lower. wall of the slot 12 drawsthe valve 9 down upon its seat against the tension of the spring 25 and 'the'suction in the chamber 2 holds it there after the float, rises. As the gasolene is drawn from the main tank into the tank 2through' the cage 6 the'float 14 rises and gradually draws the valve 8 downward until the maximum level has been reached when the valve 8 will have been brought into such a position'as to fall under the influence of the suction in the chamber2 a'nd'the impact of the fuel seeking to enter the chain her 2 with the result that the valve-will be forced down upon its seat with a ram like snapping action altogether independent of the movement of the float 14. Asa matter of fact 'the float is partly lifted by this be distinctly heard outside ofthe tank. I

stroke to snap the valve 9 off of its seat against the vacuum suction in the chamber 2. A fter the valve 1S off its seat it is drawn,

upward out of the influence of the suction by the spring 25 and the air passing in through the cage relieves the vacuum in the chamber 2- and allows the fuel therein to flow through the pipe 31 into thetank '1. The valve 9 is permitted to spring upward independently because of the slot and pin connection 11 and 12. As the float 14 descends the valve 9 is gradually drawn downward until it again seats under the action of the air passing'into the chamber 2 and is held on its seat by this suction when the float" again rises, when the above action is again repeated. \Vhen the tank becomes fullthe float 14 remains in its upper position until suff cient gasolene has been used to cause the-tank to again resume its pumplng operations.

l leretofore floats have been used for opening. atmospheric valves in vacuum tanks of the class herein describechsuch floatseither being of sufficient size to force the valves off theirseats because of the buoyancy of the float, or to put spring devices under tension for snapping the valves off their seats, but as far as applicant is aware he is the first to employ either the suction itself or the ram like action of the moving fuel to disengage an atmospheric valve from its seat against the operation of such suction. It will of' course he understood that while I have shown a certain lever arrangement between theftwo valves, the fulcrum of the lever may be moved as desired so that the suction on the valve 8 would always give sufficient of a hammer blow on the valve stem 10 to disengage atmospheric valve 9 from its seat and allow it to snap'upwardhen the [blow not of sufficient size-by itself to force the valve 9 open by straightpressurmand the only way this valve could be opened is by the hammer blow delivered to it from the valve 8 through the lever'17. The float may 'bethussaid to set ,the parts for operation,

but the real action is effected by the Suctionf on the valve 8 and the impact. of the fuel on this valve. This last is no slight force as it has back of it allthe movingliquid the pipe connecting themain tank to the cage 6.

p I do not wish to limit myself to any spe-. eific mechanism for utilizing the suction in the tank or the impact of the moving fluids for accomplishing the desired result as I- be lieve I am the first to utilize such elements in this way. 1

out being built upnfrom cemented laminations which separate under the disintegrat ing influences of the gasoline.

The whole operation 1s slmple and effec tiveand not subject to any disarrangement from road'jars of thevmachine.

The operation of the valve 8 it will be .observed prevents any overflow of the chamber 2 either from overpumping or because of the main tank being moved to an elevation above the vacuum tank as when descending a steep grade, or if employed on an air-plane when a vol-plane is being made.

It willalso be understood that the invention is notlimited to use of automobiles as it can equally well be employed on air planes, boats or any other vehicles.

It will be understoodthat the valves 8 and 9 counterbalance each other as far as atmospheric pressure is involved as the pres-.

sure is practically the same whether it is direct from the air onto valve 9 or indirectly on the valve 8 througli'the gasolene entering I the inlet port. The'valve -9 is thus practically relieved of the atmospheric pressure which holds it closed when the valve 8 approaches its seat and falls directly under the influence of the vacuum in the vacuum I tion with an elevated tank having'a vacuum chamber and a supply chamber, of a vacuum pipe connected to the vacuum chamber,

Ia supply pipe also connected to the vacuum chamber, a cut-off for the supply pipe; an

atmospheric valve operating in conjunction with the cut-0E, andconnectlons between the atmospheric .valve and the'cut-ofi', said valve, cut-off and connections being arranged to counterbalance the atmosph'erlc pressure on sa1d valve and cut-off.

2. In a fuel feeding system, the combina tion with an elevated tank having a vacuum chamber, of a vacuum pipe connected to the vacuum chamber, a fuel supply pipe also connected with the vacuum chamber; means exposed to atmospheric pressure for cutting off the fuel supply, and devices operated by the atmospheric pressure transmitted through said means for opening the chamber to the atmosphere;

3. In fuel feeding system the combina tion with an elevated tank having a vacuum r chamber, a vacuum pipe connected to the vacuum chamber, a fuel supply pipe also connected to the vacuum chamber, a cut off for the fuel supply, an atmospheric valve operated for opening by the closing movement of the cut-off, and. a float connected with the cut-off for initiating said closing movement. I V

4. In a fuel feeding system the combination with an elevated tank having a vacuum chamber, of a vacuum pipe connected to the vacuum chamber, a fuel supply pipe also connected to the vacuum chamber, a, cut off for the fuel supply operated by the moving fuel and an atmospheric valve operated in closing direction by the cut-off.

Infa fuel feeding systemthe combination with an elevated tank having a vacuum chamber, of a vacuum pipe connected to the vacuum chamber, a fuel supply pipe also I connected to the vacuum chamber, a cut off for the fuel supply position for being closed by atmospheric pressure and'an atmospheric valve operate for opening by the closing movement of the cut-off. I V

6. In a fuel feeding system the combination with an elevated tank having a vacuum chamber, of a vacuum pipe connected to the vacuumchamber, a 'fuel supply pipe also connected to the vacuum chamber, a cut-off valve for the fuel supply closin in the direction of the inward flow of t e fuel, an atmospheric valve operated by the cut-off valve, and, a floatin'the vacuum chamber for bringing the cut-off valve into the active path of' the fuel whereby it is snapped closed.

7 In a fuel feeding systemthe'combination with an elevated tank having a vacuum chamber and a supply chamber, of a valve between the two chambers, a vacuum pipe connected to the vacuum chamber,a fuel supply pipe also connected to the vacuum chamber, a cut-ofi' valve for the supply pipe, an atmospheric valve for the vacuum chamber,

operated for opening by the closing movement of the cut-off valve, and means for initiating said closing movement of the cut off valve by the rise of the liquid to a.-predetermined high level in the vacuum chamber.

8. In a fuel feeding system the combination with an elevated tank having a vacuum chamber and a'supply chamber, of a valve between the two chambers, a vacuum pipe connected to the vacuum chamber, a fuel supply pipe also connected to the vacuum chamber, a cut-off for the supply pipe positioned for being closed by the inflow; an atmosphere inlet valve for the vacuum chamber; devlces loosely connecting the cut-off and the atmosphere inlet valve for opening vthe latter by the closing movement of the former, whereby the cutoff-moves through a limited distance and the moving parts ac quire momentum before the atmosphere inlet valve is attacked by said movement for opening it, and a hammer blow is thus debetween the two chambers, a vacuum pipe j connected to the vacuum chamber, a supply pipe also connected to the vacuum chamber,

a cut-off valve for the supply pipe, an at mosphere valve operated by connections from the cut-off valve; means for lost mo-. t1on in said connectlons, means for moving the atmosphere inlet valve for opening through the range of said lost motion, the cut-ofl' valve being adapted to be seated by ment; the operating connections between the cut-off valve and the atmosphere inlet valve causing a lost motion connection with the atmosphere inlet valve; and means for initiating said seating movement of the cut-off valve operating Within the range of said last mentioned lost motion.

In testimony whereof I afiix my signature in the presence of two witnesses.

VILLIAM H. MUZZY; lVitnesses v i E. R. LUoAs;

J. A. MURPHY.

means for initiating such seating move-

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