US1289790A - Vacuum feeding device. - Google Patents

Description

J. JACOBSEN. VACUUM FEEDING DEVICE. APPLICATION FILED NOV. 8. 1917.

Patented Dec. 31, 1918k www INVENTOR. Jaffa WITNESS:

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VACUUM FEEDIN G DEVICE.

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Specification of Letters Patent.

Patented Dec. 31, 1918.

Application led November 8, 1917. Serial No. 200,927.

actuated, gasolene from a tank or reservoir located below the carbureter of the engine to an auxiliary elevatedvtank, from which the gasolene may How by gravity to the bowl of the carthe present invention is to provide a novel form ofautomatic valve mechanism; to increase the storage capacity of the auxiliary tank; to simplify the mechanism tainty of the operation; and also to improve other features which will hereinafter be described.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described claimed, having reference to the accompanying drawing, in which- Figure l is a central, yertical, longitudinal One of the objectsiof section through the device.

Fig. 2 is a plan view of same.

Fig. 3 is a diagrammatic view, showing the a plication of the invention. v

Referring to the drawings in detail, A indicates the automatic fuel-feeding device,

2 an internal combustion engine, 3 the in-l take manifold, 4 the bowl of the carbureter, and 5 the main gasolene supply tank. This tank is generally located below the bowl of the carbureter, and it is the purpose of this invention to provide means for automatically transferring gasolene from the main tank 5 to the auxiliary tank A through a pipe 6 and to permit the gasolene to flow by gravity from the tank A to the bowl of the carbureter through a pipe 7.

The device shown-consists of a main tank A and an interior tank or container B, these tanks being-secured together by means of a as shown. The inner a bottom 9, to which pipe l0, in the lower head or cover plate 8, tank is provided with is attac-hed a discharge end of which is mounted an automatic checkwithout sacrificing the cer- 4 and i 7 being extended upwardly within the tank, as shown at 13, to form a trap which will always maintain a fuel level 'above the valve 1l.

'Formed in the head l8 connected with the intake he engine while the pipe 19 1s extended upwardly to serve the function of a vent, as will hereinafter be described. The pipe 6 is extended downwardly within the 'tank B to deliver the gasolene elevated from the tank 5 at a point where it will not disturb the action of a float shown at 20.

Thisioat 20 is provided with an upwardly provided with a enters the lower discharge pipe l() and is guided with relation by means of afbea'ring bracket 24. The valve stem 2l and lthe lower projecting form a perfect guide for the float and on y permit a vertical movement of same.

end in the head, lower end by a bracket 27. The upper end of the rod is provided with a valve head 28 which is adapted to be raised or lowered with relation to a seat 29. The connection 16 is'also provided with a lateral venting passage 30 which communicates with an annular chamber 31 formed between vthe tanks and B and with the vent pipel 19.

The construction and positionof the lower check ,valve v11 form one of the important features of the present invention. This check valve is positioned directly below and in alinemen-t with the pipe 10 and is supported in this position by a guide bracket lla secyred on the lower end of the pipe. A seat is also formed on the lower end of the pipe l0 for the reception of the valve and as only a comparatively small movement is required, it can readily be seen that this valve will quickly open or close to permit fuel admitted to the inner tank to discharge into i suction produced also causes |the check valve 11 to close and thereby prevents the gasolene or fuel admitted fromdischarging into the main 'tank A. The float valve under such conditions reaches its lowermost position and permits the venting valve 28 to remain on its seat and thereby prevents outside air from entering. Continued suction and admission of fuel to the inner tank ,causes the float 20 to gradually rise in proportion to the increase in fuel level. and a point is finally reached where the valve '21 will engage the seat and close off the suction connection. The 'valve 28 is simultaneously lifted from'itsseat as 'the upper end of the float engages the stem and air is then admitted through the vent pine, thereby breaking the vacuum and permitting the check valve 11 yto open and the fuel collected in l'the tank B to discharge into the main tank A.

The float remains in its uppermost position until the fuel level in the tank B has receded a coi'isiderable distance; that is, it might be stated that valve 21 adheres to the seat 22 due to the constantsuction in the pipe 18. The weight of the float is, however, sutlicient to pull the valve away from the seat the' moment the fuel level has receded a certain distance and it. therefore. pulls/away quickly the moment this point is reached. Valve 28 is simultaneously permitted to seat as the recession of the tioat allowssaid valve to drop. Suction is again produced in lthe inner is, of course, automatically closed, thereby preventingthe fuel already delivered in the main -tank from'retu'rning or backing up into the inner tank. The lateral venting passage, which is in constant communication with the pipe 19, maintains atmospheric pressure in the main tank A, thereby permitting the fuel delivered'thereto to run b v gravity throughpipe 7 directly to the bowl of the carbureter, while the vent connection formed between the inner tank and the pipe 19 is intermittently opened and closed, it being closed while fuel is being admitted and opened during the time period when the fuel is transmitted through the pipe l() to the main tank.

The structure as a whole is very simple 'charge pipe on the lower end tank B and valve 11 and compact in arrangement. There are,

practicallyv speaking, only three moving parts, lto-wit, the valve 28, the 4float 20 and f the check valve 11, and as these are as elemenltary and simple in construction and arl rangement as it is possible to produce any mechanical element, it is obvious that cer-l tainty of operation can always be relied on. The manner 0f securing the inner tank .to the outer tank and in turn the two tanks to the head v8 is also of importance as it reduces the cost of manufacture materially.

The device as a whole does not only serve the function of an elevatedauxiliary reservoir for fuel, but it also acts as a pump for transferring fuel from the source of supply thereto, and as its action is positively automatic it-can readily be seen that its application and use as here shown are of considerable importance.

The materials and finish of the several parts of the device may be such as the experience and judgment of the manufacturer may dictate.

l lwish it understood that various changes in form, proportions, and minor details of construction may be 'resorted to within the scope of the appended claims and thatl I do not wish to limit myself to Athe specific desien and construction here shown.

aving thus described my invention.

vwhat l claim and desire to secure by Letters Patent is- 1. A. vacuum feeding device comprising an inner and an outer tank, a head member adapted to form a closure for' the inner and outer tanks and to separate said tanks one from the other, a discharge pipe secured in thelower end of the inner tank forming a communication between said tanks, a check valve on the lower end of said pipe, a dis'- of the outer tank and extending up thereinto above the check valve whereby to provide a liquid trap thereabout; a feeding pipe connected with the upper end of the inner tank, a suction pipe connected with the upper end of the inner tank, a venting pipe connected with the upper end of the inner and outer tank, a tioat within the inner tank, a stem on each endl of the float, guides for said stems securing the float against lateral displacement but permitting 1t to move .freely vertically, a valve member on the upper stem section, a valve seat in the suction pipe with which said valve is engageable, a valve adapted to close the venting opening in the head communicating with the inner tank, a stem projecting downwardly into the inner tank adapted to be engaged by the tioat and a passage in the head connecting the interioreof the outer tank with the venting pipe.

2. A vacuum feeding device comprising an outer tank having its upper edge turned inwardly, an inner tank having its upper edge turned outwardly over the inturned edge of the outer tank for being supported thereby, a head secured to the upper edges of the tanks `and provided with a venting opening communicating with the outer tank, a second opening for connection with the intake manifold and a third opening for connection with a liquid supply, a valve controlled passage between the two tanks, an outlet leading from the outer tank, a valved communication between the venting opening and the inner tank, a float in the inner tank,` a stem extending upwardly from the float and through the second opening of the head formed on its uppel` end with a valve, and a removable valve seat secured to the head over the second opening for engagement by the valve end of the stem.

' 3. A vacuum feeding device, comprising a pair of tanks mounted one within the other, means for producing a suction in the inner tank, means connecting the inner tank with a source of liquid supply, means for venting the inner tank, a float within the inner tank, a slidably mounted valveadapted to open or close the vent connection, a valve attached to the oat adapted to open or close the suction connection, a stem on the venting valve adapted to be engaged by the :fioat and lifted thereby to open the venting connection, a discharge pipe connecting the inner tank lwith the outer tank, a vertically movable check valve mounted directly below the discharge pipe'in alinement therewith for seating thereon, and a bracket carried by the discharge pipe for guiding the check valve to its seat.

4. The combination with the discharge pipe forming a comn'iunication between the inner and outer tanks 1n the device described, of a bearing bracket secured on the lower end of the pipe, a valve seat on the lower end of th bracket eXtends in spaced relation to the seat, a valve adapted to engage said seat, and a vertically positioned stem to which said valve is secured slidably mounted in the bearing bracket.

5. The combination with the inner and outer tanks described, of a head member adapted to form a closure for the inner and outer tanks and to separate said tanks one from the other, a discharge pipe' in the lower end of the inner tank forming a communication lbetween said tanks, a check valve on the lower end of said pipe, a float within the inner tank, a guide rod on each end of the float, a valve member formed on the upper end of one of said rods, a seat in the head with which said valve is adapted to engage, an extension a vent pipe connected with said extension, a central opening formed in said extension communicating with the inner tank, a lateral opening in said extension communicating with the interior of the outer tank, a valve seat in the vcentral ope-ning, a valve adapted to engage said seat, a stem on said valve projecting downwardly into the inner tank, said valve adapted to, be raised and lowered from its seat by engagement of the float with the rod, and a bearing bracket for the rod.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JACOB JACOBSEN. Witnesses W. W. HEALEY, M. E. EWING.

e pipe across which vthe formed on the head,

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