US1424486A

US1424486A - Fuel-feeding apparatus

Info

Publication number: US1424486A
Application number: US476597A
Authority: US
Inventors: Kinzie Phillip Alexander
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-06-10
Filing date: 1921-06-10
Publication date: 1922-08-01
Anticipated expiration: 1939-08-01

Description

P. A. KINZIE.

FUEL FEEDING APPARATUS.

APPLICATION FILED IuNE 1o, I92I.

I 1,424,486. y l Patented Aug. l, 1922,

Il Il INy "iff .5.5.7. K ULL l2 zo 7* '//V w.

72 *IIIIIIIIIIII I 5/ II\IV\I 'U M y 262207 f- ,7429 27 5" u 0 FUEL-FEEDIN G APPARATUS.

Specification of Letters Patent.

Patented Aug. l, 1922.

Application filed June 10, 1921. Serial No. 476,597.

To all whom t ,ma concern.'

Be it known that PHILLIP ALEXANDER KIetzIE, a citizen of the United 'States of America, residing at Littleton, county of Arapahoe and State of Colorado, have invented a new and useful Fuel-Feeding Arapahoe, and State of Colorado, have inspecification.

My invention relates to a new automatically operating pressure feeding apparatus for the gasoline or other fuel used in internal combustion engines.

And the objects of my invention are:

First. To provide a pressure feeding apparatus thatwill force the gasoline or other fuel into the carburetor by air pressure and that will automatically regulate the pressure of the air.

Second. To provide a pressure feeding apparatus for internal combustion engines that is so connected to one of the cylinders of the engine that the explosions in that cylinder will act to pumpingly compress air and deliver it to the top of the main gas'- oline or other fuel supply tank, and that forces the gasoline from the main supply tank into an auxiliary tank placed above it, from which it flows to the carburetor, and from the carburetor as an explosive mixture, into the engine cylinder, to which my pressure fuel feeding apparatus is connected, as well as to the other cylinders of the engine.

Third. To provide a pressure feeding gasoline or other fuel apparatus for internal combustion engines, that automatically compresses air by apumping-mechanism that receives its operative power from the expansive force of the exhaust gases at the time of the spark explosions of the gasoline or other fuel explosive mixture in one of the cylinders of the engine, and that conveys the air to the main f uel supply tank of the engine,and that is provided with a safety valve that automatically regulates the air pressure in the fuel supply tank to that pressure best adapted to even pressure flow of the fuel to the carburetor.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a side elevation of my gasoline fuel pressure feeding apparatus, operatively connected to the main gasoline supply tank and to a cylinder of an internalcombustion engine.

Fig. 2 is a plan view of my gasoline pressure feeding apparatus for internal combustion engines, showing a small portion of its casing broken away to show the internal construction of a part of it.

Fig. 3 is a section through the back fiame preventing chambered casing of the pressure feeding apparatus.

F ig.' 4 is a longitudinal, central section through the air compressing pump portion f liy gasoline pressure feeding apparatus.

Fig. 5 is a longitudinal, central sectional view of the air compressing pump showing slight variations and changes in some of its parts, and of its back flame preventing chambered casing. l

Similar letters of reference refer to similar parts throughout the several views.

My invention has been especially designed to be attached to the already installed and operatin internal combustion engines of automoblles, trucks, marine boats, flying machines, and especially to the engines of tractors; and it is directly connected to one of the cylinders of the engines and also to their gasoline supply tank and to their carburetors; and the preferred arrangement and construction of my gasoline or other pressure fuel feeding apparatus is as follows:

In Figures 1 2, 3 and 4 I illustrate a different shaped air compressing pump than is shown in Figure 5, and there are slight differences in construction between the two, but the general constructive features and arrangement of the several parts relative to each other is practically the same, while their operating function of compressing air and forcing it into the main gasoline supply tank is the same.

As Figures -i and 5 are complete sectional views. and as they show the two different arrangenlents of some of the partsof the air compressing pumps through their piston cylinders, they will be described first, and the same reference numerals will be used for both of these views wherever the parts are alike or similar to each other.

The numeral 1, designates the casing of my complete air compressing pump, the principal difference being that the casing in Figure 4 is provided with a back fire preventing chambered casing 2, that is cast on one side of the casing l, while the cascasing 31, that is provided with a back liring tubular casing 2A. Each of these back firingv chambered members will be fully explained hereinafter.

The casings 1, of Figures 4 and 5, are provided with an air compressing chamber 3, which is provided with air inlet apertures 3A, that extend into and through the casing 1. y

The casing 1, of both Figures 4 and 5, is preferably cast integrally with a removable cover 4, of an auxiliary gasoline tank 5, although the cover may be removably secured to it ifA desired.

One end 6, of the casing is either provided with a reduced nipple portion 7, or Withan interiorly threaded aperture 7A, to which one end of a pipe 18, is connected. This pipe 8, is provided with any suitable connecting fitting that can be threaded over the nipple 7, or threaded into a removable valve seat bushing 8A, which is preferably inserted in the end of the casing 1, of Figure 4, rather than forming the valve Seat in the casing itself. The opposite end 9, of the pipe 8, is threaded into a threaded aperture 10, that is formed in the top portion of one of the cylinders 11, of the engine 12', just above the end of the upper stroke of the engines piston, which is not illustrated.

The threaded aperture 10, in the cylinder, is one of those that was originally'made to receive a priming cup, but the priming cup has been removed, and the end 9,.of the pipe 8, is connected to it.

The engine 12, is provided with the commonlv used gasoline supply tank 14, which I will call the main gasoline supply tank,`

and a pipe 15, extends from the bottom of the main gasoline supply tank 14, to the bottom of the auxiliary tank 5, through which it extends upwardly within the tank 5,.from its bottom by means of an extension pipe 16, that is connected to the pipe 15, at the bottom of the tank by suitable pipe and tank fittings. This pipe 16, extends from the bottom of the tank upwardly to close to the underside of its cover 4, and the gasoline in the main gasoline supply tank 14, is forced up into the auxiliary tank 5, which is positioned above it, by compressed air, as will be fully described hereinafter.

To the bottom of the auxiliary tank I secure one end of a pipe 17, the opposite end of which extends to and. is connected to a carburetor 18, which is connected by a manifold 18A, to the cylinder 11. The carburetor is positloned enough below the auxiliary tank to allow the gasoline therein to flow readily from the auxiliary tank 5, to it.

The casing 1, of the air compressing cylinder 3, is preferably made about three and a half inches lon and it is preferably only about seven-eig ths of an inch in diameter,

and to facilitate making c0nnections,its opposite ends 19, are preferably made of hexagon form. y

The air compressing chamber 3, is preferably about a half inch in diameter, and extends throughout its length to close to its nipple end.7, where it is intersected by a small aperture 7A, that is formed through4 the axial center of the nipple 7, of Figure 5, or through the valve seat plug 8B. The intersecting shoulder of the cylindrical chamber 3, and the axial aperture through the terminal nipple 7, or at the end of the bushing 8A, is provided with a valve seat 8C, and a ball valve 20, (which is only shown in Figure 5,) which is normally held against its seat by a reciprocating piston 21, that is actuated in one direction of its reciprocal movement by an expansion spring 22; the piston after passing the air inlet port 3A acts to compress the air that freely enters the chamber 3, through the air inlet apertures 3^, that are formed through the shell of the casing 1.

The entrance to the rear end of the cylinder bore of the air compressing chamber 3, is interiorly threaded, and an adjustable plug 23, is. threaded into it, and the rear end of the spring 22, bears against a shoulder 22A, formed on it. The outer end of which is provided with a wrench receiving end 24, by which it may be adj ustably turned in the casing. This plug 23, is provided with

axial apertures

25 and 26, of different diameters, which extend in end to end alinement entirely through it. The largest aperture 25, is` at its outer end, and -it contains a tapered valve seat 27, at its inner end, against which a ball valve 28, that -controls the s aperture 26, is normally held by an expansion tension spring 29, the outer end of which abuts against the end of a reduced threaded nipple portion 30, that is formed on the end ofa T-shaped safety valve casing 31, in Figure 5, andagainst a disk' 31A,

in Figure 4, which is secured in the outer end of the plug 23. This safety valve casing 31, which is only shown in Figure 5, contains an axial bore of two different di-v ameters, 32 and 33, and an air outlet hole 34, is formed through the casing into the largest aperture 32, close to the tapered shoulder at the junction of these two apertures, which forms a seat for a ball valve 35, and an expansion tension spring 36, that is adjustably held against the ball Valve by a plug 37, that is adjustably threaded into the end of the aperture 32, of the casing 31. This safety valve casing 31, comprises a small T-shaped casting that has a depending nipple portion 38, which `is provided with an axial aperture 39, and the terminal end of the nipple is connected to one` end of the back fire preventing chambered casing 2A, and the opposite end of the a countersunk recess that back lire preventing chambered casing 2A, is threadedto one end of a pipe 40, in Figure 5, and this pipe 40, is also connected in Figure 1, to the lower end 41, of the back lire preventing chambered casing 2, and the opv posite end of the pipe 40, extends to and is connected to the top portion of the main gasoline supply tank 14.

The piston 21, is provided with oil grooves 21A, and the front end of the piston shown in Figure 5, is provided with lits partially over the ball valve 20. This ball valve 20, is dispensed with in Figure 4, and instead of it, the end of the piston is taper pointed to lit against the valve seat 8C.- The rear end of the spring 22, bears expansively against a shoulder 41, formed on the inner end of the plug 23. Consequently this expansion tension spring 22, holds the piston normally under a constant resilient pressure that normallly holdsl the inner end of the aperture 7A, closed so that no gases or air can escape past it and iow back into the cylinders 11, through the pipe 8, when the piston thereof makes its downward strokes, as will be fully explained hereinafter. Consequently, the piston 21, Ican be used either with or without the ball valve 20, as described.

The air compressing cylinder, with its two valves and the piston and the springs that actuate them in one direction of their movement, I term an air compressing pump, as it intermittently pumps air on top of thegasoline. in the main ga'solline supply tank 14.

The back lire preventing chambers 2 and 2A, are arranged as follows: The air compressing pump construction of Figures 2, 3 and 4, and its back lire preventing chambered casing 2, represents my preferred co-nstruction, as it is especially adapted for use on engines ofhigh powered automobile cars, trucks, tractors, marine and flying machine engines, although the air pump illustrated lin Figure 5, and its back firing preventing chambered casing may be used if desired.A Its smaller back firing preventing casing and pressure escaping mechanismadapts itI more for use on the general sizes of smaller motors of cars and trucks than the larger sizes shown in Figures 2, 3 and 4. The principle of construction and operation, owever, is substantially the same in both devices.

The chambered casing 2, is larger in diameter than the chambered casing 2A, but each is provided with a number of disks of fine wire gauze screens' 42, of which there are ve shown in each of the chambers 43, of the

casings

2 and 2^, and they are held in place by turned-up or cupped edges 44, that lit against the wall of the chamber.

The 10W/er screen disk rests o-n a shoulderv piston.

45, and the other four disk screens rest on top of each other at their edges.

In the air compressing pump illustrated in Figures 1 and 4, the air, as it is compressed by the piston 21, flows from rthe large axial aperture 25, which contains the spring 29, through radial holes 46, into and through a passageway 47 that is formed in the casings 1 and 2', into the chamber 43, of the casing 2, instead of through the safety T-shaped member 31, of Figure 5, and instead of the pressure relief valve 35, and its spring 36, in Figure 5, the chambered casing 2, is provided with a removable cap 48, that is secured to the casing by screws 48A, and that is provided with an upwardly projecting hub 49, that contains a threaded aperture, in which an adjustable plug 50, is threaded. The plug 50, is provided with an axial aperture in which a valve stem' 51, fits slidingly, on the lower end of which a flat thin beveled edge valve 52, that sets on a bevel edged valve seat that is formed inl the upper edge of the chamber 43, is placed.

The upper end of the valve stem is provided with a screw driver'receiving slot 53, by which the valve can be turned and ground on .its seatto insure that it will seat much more evenly than it would if left in a stationary position thereon.

On the valve stem 51, below the end of the plug 50, and between it and the top of the valve 52, an expansive coiled spring 54, is placed, which normally holds the valve 52,- against its seat, by its expansive resilient pressure against the valve.

The bottom of the cap 48, of the chambered casing 2, is provided with radial grooves 55, which permits the excess air pressure that flows into th-e chamber 2. from the air compressing chamber 3, of the casing 1, to escape to the atmosphere, where it is under pressure to lift the flat valve 52. This adjustable valve mechanism with its air escaping grooves 55, is the equivalent of the ball valve 35, and its spring 36, and the air escaping apertures 34, in the T-shaped casing 31.

The operation of my pressure fuel feeding apparatus is as follows:

As each and every spark explosion takes place at the upper end of the cylinders 11,

enough exhaust gas is forced by the compreive explosion in the cylinder through the pipe 8, and the aperture 7A, of the nipple 7, of the casing 1, to move the piston 21, backward against its spring 29, which com,- p-resses air in the chamber 3, that enters it through the air inlet apertures 3A, which are positioned in the casing 1, at the rear end of Consequently, the j interior of the chamber 2, is always normally lilled with air that Hows freely into it through the apertures 3A, in the shell of its casing, and at each ex- 3, of the a1r compressing cylinder plosion stroke ofthe engine of the cylinder 11, asmall quantity of exhaust gases-is driven through the pipe 8, and the aperture 7A, against the liston 21, which is driven vio- -lently back from its seat against its spring 22, and the piston 21, on this violently quick backward stroke compresses the air in the chamber 3, and forces it through the aperture 26, in the plug 23, through which it is forced against the ball valve 28,- that is moved back a ainst its spring 29, allowing the compresse air to flow into the apertures 33 and 39, in the T -shaped safety valves casing 31, from which it flows through the depending tubecasing 2A, containing gauze wire screen 42, which. prevents any possibility of flame from the explosion in the cylinder 11, from moving through the pipe 40, to the main fuel tank 14. The compressed air, however, flows throughl the pipe 40, into the 4tank 14, and exerts a pressure on the top surface of the gasoline supply therein, that forces it to flow up through the pipes and 16, into the top of the auxiliary gasoline supply tank 5, and from this auxiliary tank the gasolineflows also by pressure, through the pipe 17, to the carburetor 18, through which it passes and'flows from it through the manifold 18A, as explosive gas into the cylinder 11, of the engine 12. Consequently, air is pumped intermittently at each explosive stroke of the piston in the cylinder 11; as the pipe 8, of my pump is connected to only one of the four or more cylinders the engine motor may have, but the explosions in this one cylinder are suflicie-ntto keep the main gasoline supply tank 14, filled with an air pressure that forces an abundant supply of gasoline up into the auxiliary tank 5, and more air will be compreed and pumped into the main gasoline supply tank than is necessary, for when the airv pressure is too great, the gasoline is forced too fast into the auxiliary tank and from it into the ca-rburetor, and it is consequently necessary to use the tension of the spring 36, of the safety ball valve 35, so that it will let the air pressure escape through the aperture 34, in Figure 5, to maintain onlythat pressure which will force the gasoline to feed properly from the main gasoline tank tothe auxiliary tank, and from it to the carburetor.

My invention provides a positive and reliable pressurefuel feeding apparatus for internal combustion engines requiring no attention or assistance lfrom the driver, which removes the necessity of having an auxiliary unit such as the commonly used hand or manually operated pump vrequired in present systems in use, for producing pressure upon the main gasoline tank, when the motor has been stopped and left standing in an inoperative condition for any length of time, and while I have illustrated its re- 35 ferred construction and arrangement, do

lll)

not wish to be limited to it, as changes may be made without departing from the spirit of my invention. r

Having described my invention, what l claim as new and desire to secure byv Letters Patent, is:

' 1. A pressure having an apertured member connected to the cylinders of said engine at its fuel explosion end, and provided with an air compressing chamber, a valve seat in said chamber at the passage leading to said cylinder, and means including a piston lreciprocally mounted in said chamber and bearing against said valve seat for controlling said passage. Y

ternal combustion engines, comprising a casing having an apertured member connected to the cylinders of said' engine atlits fuel explosion end, and provided with an air compressing chamber, a. valve seat in said chamber, controlling the passage leading to said cylinder, a sprlng actuated reciprocating member in said chamber arranged to control said valve seat, and an adjustable plug in said chamber arranged to adjust the pressure of said spring aga-inst said reciprocating member. i

3. A pressure feedingl apparatus for internal combustion engines, comprising a casing having an apertured member connected to the cylinders of said engine at its fuel explosion end, and provided with an air compressing chamber, and a vpassageway from said cylinder into said chamber; with a reciprocating member in said chamber arranged to control said passageway, and an adjustable plug in said chamber arranged to adjust the pressure o f said spring against said piston, said casing being provided with air inlet apertures between said reciprocating member and said plug.

4. A pressure feeding apparatus for inter- -nal combustion engines, comprising. a casing having an apertured member connected to the cylinders of said engine at its fuel explosion end, and provided with an air compressing chamber, avalve in said chamber controlling the passage leading -to said cylinder, a spring actuated piston .reciprocally mounted in said chamber and bearing against said valve, and an adjustable plug in said chamber arranged t0 adjust the pressure of said spring against said piston, said casing being provided with air inlet aperfeeding apparatus for internal combustion engines, comprislng a. casing pressure feeding apparatus for iny tures between said piston and said plug, said plug being provided with an axial aperture, and a spring controlled valve seated in said aperture. f

5. A pressure nal combustion engines, comprising a casing having an apertured member connected to the cylinders of said engine at its fuel exfeeding apparatus for interl plosion end, and provided with an air compressing chamber, a valve in said chamber controlling the passage leading to said cylinder, a spring actuated piston reciprocally mounted Ain said chamber' and bearing against said valve, and an adjustable plug in said chamber arranged to adjust the pressure of said spring against said piston, said casing being provided with air inlet apertures between said piston and said plug, said plug being provided with an axial aperture, and a spring controlled valve seated in said aperture, and an axial aperture T-'shaped casting provided with an outlet aperture and provided with a pressure relief valve in its axial aperture.

6. A pressure feeding apparatus for internal combustion engines, comprising a casing having an apertured member connected to the cylinders of said engine at its fuel explosion end, and provided with an air compressing chamber, a valve in said chamber controlling the passage leading to said cylinder, a spring actuated piston reciprocally mounted in said chamber and bearing against said valve, and an adjustable plug in said chamber arranged to adjust the pressure of. said spring against said piston, said casing being provided with air inlet apertures between said piston and said plug, said plug being provided with an axial aperture, and a spring controlled valve seated in said aperture, and an axial apertured T-shaped casting provided with an outlet aperture and provided with a pressure relief valve in its axial aperture, said engine being pro-vided with a main supply tank, and said casing j being provided with an axially apertured depending nipple member, and a pipe connected at one end to said nipple member and to thetop of the said main fuel supply tank.

7. A pressure feeding apparatus for internal combust-ion engines, comprising a casing having an apertured member connected to the cylinders of said engine at its fuel explosion end, and provided with an air compressing chamber, a valve in said chamber controlling the passage leading to said cylinder, a spring actuated. piston reciprocally mounted in said chamber and ,bearing against said valve, and an adjustable plug in said chamber arranged to adjust the pressure of said spring against said piston, said casing being provided with air inlet apertures between said piston and said plug, said plug being provided with an axial aperture, and a spring controlled valve seated in said aperture, and an axial apertured T- shaped casting provided with an outlet aperture and provided with a pressure relief valve in its axial aperture, said engine beingv provided with a main supply tank, and said casing being provided with an axially apertured depending nipple member,and a pipe connected at one end to said nipple member and to the top of said main fuel supply tank, means for securing said air compressor to said auxiliary tank, and a pipe connected at one end to the bottom of said main fuel supply tank, and extending to and through and up into the top portion of said auxiliary tank.

8. A pressure feeding apparatus for internal combustion engines, comprising a casing having an apertured member connected to the cylinders of said engine at its fuel explosion end, and provided with an air compressing chamber, a valve in said charnber controlling the passage leading to said cylinder, a spring actuated piston reciprocally mounted in said chamber and bearing against said valve, and an adjustable plug in said chamber arranged to adjust the pressure of said vspring against said piston, said casing being' provided with air inlet apertures between `said piston and said plug, said plug being provided with an axial aperture, and a spring controlled valve seated in said aperture, and an axial apertured T-shaped casting provided with an outlet aperture and provided with a pressure relief valve in its axial aperture, said engine being pro.- vided with a main supply tank, and said casing being provided with an axially apertured depending nipplev member, and a pipe connected at one end to said nipple member vand to the top of the said main fuel supply tank, an auxiliary fuel holding tank above said main fuel tank, means for securing said air compressor to said auxiliary tank, andl a pipe connected at one end tofthe bottom of said main fuel supply tank, and extending to and through and up into the top portion of said auxiliary tank, and a pipe secured to the lbottom of said auxiliary tank and extending to said carburetor.

9. A pressure feeding apparatus for internal combustion engines, comprising acasing having an apertured member connected to the cylinders of said engine at its fuel explosion end, and provided with an air compressing chamber, a valve in said chamber controlling the passage leading to said l cylinder, a spring actuated piston reciprocally mounted in said chamber and bearing against said valve, and an adjustable plug in said chamber arranged to adjust the pressure of said spring against said piston, said casing being provided with air inlet apertures between said piston and said plug, said plug being provided with an axial aperture, and a spring controlled valve seated in said aperture, and an axial apertured T- shaped casting provided with an outlet aperture and provided with 'a' pressure relief valve 125 in its axial aperture, said engine being provided with a main supplytank, and said'casing being provided with an axially apertured depending nipple member, and a pipe connected at one end t0 said nipple member and 18,0

tothe top of the said main fuel supply tank, an auxiliary fuel holding tank above said main fuel tank, means for securing said air compressor to said auxiliary tank, and a 'pipe connected at one end to the bottom of y to the bottom of said auxiliary tank and extending to said carburetor, and means Within the air compressing chamber of said air pumping cylinder for preventing back firing of the explosions in thefcylinder of said engine to which said air ump is attached.

10. A fuel pressure eeding apparatus for gasoline or other explosive fuel used in the cylinders of internal combustion engines', provided With a carburetor .comprising an intermittent pump mechanism connecte-rl to oneof the cylinders of said engine, and an automatically operated pressure regulating and safety valve, and arranged to'pump air into the main fuel supply tank of the engine, and means for forcingithe fuel from the main supply tank and feeding it to the carburetor of the engine. i 11. A pressure feeding apparatus for internal combustion engines, comprising a casing having an apertured member connected to the cylinders of said engine at its fuel explosion end, and provided with an air compressing chamber, ber controlling the passage leading to said cylinder, a spring actuated piston recipro- `cally mounted in said chamber and bearing against said valve, and an adjustable plug in said chamber arranged to adjust the pressure of said spring against said piston, said.

. casing being provided With air inlet aperaperture, said axial bear 4against said valves actuating spring,

tures between said piston and said Plug, said plug being provided With` an axial aperture, and a spring controlled valve seated in said apertures beingvof two different diameters, a spring actuated ball valve at the junction ofthe two diameters, and an adjustable Aplug threaded into the end of the valve' aperture and arranged to whereby the said valvmaybe regulated to automatically regulate the pressure of the air being compressed in lsaid casings chamber and pumped into said main fuell supply tank by said reciprocatingpiston actuated by the explosive force of the explosions of 'the explosive mixture in the cylinder toy which said air compressor is attached. 12. A pressure feeding apparatus f or internal combustion engines, comprising a casing having an apertured member connected to the cylinders of said engine at its fuel explosion end, and provided -With an air compreing chamber,-a valve in said chamber controlling thepassage leading to said cylinder, a s ring actuated piston reciproeally inoun in said chamber and bearing a valve in said cham-- der and and connected thereto, to receive main fuel supply ta-nk, means for securing l fsaid air compressing cylinder to the cover of said auxiliary tank, said carburetor piping connected to the bottom of Said auxiliary tank and extending to said carburetor, and means including a pipe for conveying the air compressed in said chamber to the top of said main fuel supply tank, whereby a small portion of the explosive force of the intermittent explosions o-f the explosive mixture in the cylinder to Which said air compressing and pumping cylinders is attached, compresses air in said cylinder and pumps it int-o the tcp of said main fuel supply tank, from Which it is forced by said air pressure up into said auxiliary tank, from Which. it flows to said carburetor from which, the explosive mixture flows into the cylinders, said air compressing and pump-ing cylinder is attached to.

13. ln a gasoline or other explosive fluid pressure feeding apparatus of the carburetors and cylinders of internal combustion engines, the combination of a cylinder of the engine, and the main fuel supply tank, with an air compressing pump connected at one end to the fuel exploding part of said cylinarranged to force air into said main fuel supply tank, and provided With a back fire stopping and preventing chambered casing, the chamber of which is provided With a plurality of gauze Wire screens, and with a spring controlled pressure relief valve. lll. In a gasoline or lother explosive fluid pressure feeding apparatus for the carburetors and cylinders of internal combustion engines, the combination of acylinder of the engine, andthe main fuel supply tank, With an air compressing pump connected at one end to the fuel exploding part of said cylinder and arranged to force air into said main fuel supply tank, and provided with a back fire stopping and preventing chambered casing, the chamber of which is provided With aplurality of auze vvirescreens,

and with a spring contro ed pressure relief A valve, an auxiliary fuel holding tank positioned above said main fuel supply tank e therefrom, and a carburetor connected operatively to said auxiliary tankand to said cylinder, whereby said pump receives explosive pulsations from said cylinder and compresses and forces air into said main fuel tank and forces the fuel from it up into said auxiliary tank, from which it flows by pressure into said carburetor, an'd from it into said cylinder.

l5. In a gasoline or other explosive fluid pressure feeding apparatus for the carburetors and cylinders of internal eombustio-n engines, the combination of a cylinder of the engine, and the main fuel supply tank,

- with an air compressing pump connected at one end to the fuel exploding part of said cylinder and arrange-d to force air into said mainfuel supply tank, and provided with a back fire stopping and preventing chambered casing, the chamber of which is provided with a plurality of gauze wire screens, and with a spring controlled pressure relief valve, said screens being arranged across said chamber in the path of the compressed air flowing into said main fuel supply tank, and said pressure relief valve comprising a disk-shaped valve seated in said chamber,

an adjustable plug threaded in said chamber, a valve stem on said valve slidably mounted on said plug, and an expansive pressure spring mounted on said valve stem between said plug and said disk Valve, and arranged to normally hold said disk valve closed against its seat in said chamber casing, and against the air pressure therein, and air escaping apertures extending through said casing from said chamber above the opening movement of said valve.

In testimony whereof I ailiX my signature in presence of two Witnesses.

Witnesses THEO. BORGSTEDT,

GLADYS SPENGLER.