US1415026A - Fuel-feed apparatus - Google Patents

Description

W. J. FRISBIE.

FUEL FEED APPARATUS.

APPLlcATloN FILED SEPT. 1s. 1920.

Patented May Y9, 1922.

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WILLIAM J. FRISBIE, OF CHICAGO, ILLINOIS, ASSIGNOR TO JUSTRITE MANUFAC- TURING COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS.

FUEL-FEED APPARATUS.

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Specification of Letters Patent.

yPatenteil May 9, 1922,

Application filed September 13, 1920. Serial No. 410,056.

To all wlw-m t may concern:

Be it known that I, \V1LLIAM J. FRISBIE, a citizen of the United States, and a resident of Chicago, in the county of Cook, State of Illinois, have invented certain'new and useful Improvements in Fuel-Feed Apparatus, of which the following is a specification.

My invention relates ,to fuel feed ap-A paratus for controlling the flow of fuel to thecarburetor of an engine from a main supply tank situated below the level of the carburetor. My inventionbelongs to that class in which the impulse principle of operation is used, and the invention may be considered as an improvement over the structure disclosed in Carter Patent No. 1,146,133 of July' 13, 1915. One important object of my -invention is to simplify the construction and operation of the check valve mechanism. Another important object of the invention is to so arrange and control the float member which is connected with one of the check valves, that such valves wi-ll` be free from any strain and neither the valve nor the fioat will at any time stick and fail to operate properly.

My improved apparatus is shown on the accompanying drawing in which- Fig. 1 is a vertical diametral section land Fig. 2 is a sectional view on plane 2 2, Fig. 1.

The apparatus shown comprises a cylindrical reservoir 5 which is located above the level of the main fuel tank and also above the carburetor. In its base the reservoir has the fitting 6 providing the central passageway 7 adapted for connection by pipe 8 with the main'oil tank. The fitting has also the outlet passageway 9 for connection by the pipe 10 with the carburetor to be served. On top of the reservoir is the impulse producing mechanism I, which comprises upper and lower dish shaped halves 11 and 12 secured together at their flanges b v screws13. The flangesv of the members receive between them the peripheral section of the diaphragm 14 which is of suitable material as for example, layers of canvas treated with suitable substance to make the y diaphragm air tight and also to preserve it.

The lower member 12 of the impulse mechanism forms the closure for the reservoir and it has the opening 15 with which registers and communicates the chamber 16 formed in the fitting 17. Near its upper end the fitting has the annular shoulder 18 forming a seat for the compression spring 19 which extends upwardly to the opening 15 and abuts against the stitfener disk or plate 20. At the lower side of the plate, the nipple 21 receives the upper end of the spring and the spring thus keeps the stiHening plate centralized with reference to the diaphragm.

Extending upwardly from the upper impulse device member 11 in axial registration with the spring 19 is the valve housing 22 having the valve chamber 23 for the ball valve 24. The spring 19 normally presses the diaphragm against the inner side of the member 11 but between the diaphragm and the member is the pedestal 25 between whose base 26 and the member 11 is inserted the spiral spring 27. kThe, pedestal 25 extends through the passageway 28 but is of lesser diameter in order to permit clearance space. At its upper end the pedestal is concave to 'form a seat for the ball valve. Then the diaphragm is up, the pedestal holds the ball valve a distance above the conical seat 29 formed between the valve chamber-23 and the upper end of the passageway 28, vbut when the diaphragm is down, the pedestal will be withdrawn from the ball valve to permit it to rest on the seat 29.

In the housing is also seated' the plug 30 provided with the passageway 31 whose lower end is tapered to form a seat for the ball valve when it is raised. A fitting 32 secures a pipe 33 in the end of the housing which pipe is in practice connected with the engine cylinder or other impulse producing mechanism. Seated in the upper wall of the impulse mechanism is the vent frame 34 having the vent outlet 35 and containing the ball valve 36.

Through the lower end of the fitting 17 is the passageway 37 of less diameter than that of the chamber 16 ,and the annular shoulder 38 forms a seat for the inlet check .valve 39. At its lower end the fitting 17 is in threaded engagement with the upper end of the pipe 40 which at its lower end threads into the fitting l6 to communicate with the oil inlet pasageway 7.

The fitting 17 has the enlargement 41 at one side in which is the vertical valve chamber 42 for the conical valve 43 which seats in the upper end of the pasageway 44 leading from the valve chamber 16 to the chamber 42, the latter chamber having the side outlet 45 just above 4the pasageway 44. lin the upper end of the valve chamber 42 is the guide plug 46 through which extends the stem 47 on the valve 43, the upper end of the stem being threaded to receive the abutment nut 48 and the loc'kf-nuftv49f f Depending from the enlargement- 4f17at the lower end thereof are the arms 50 and 5l for supporting the float member 52 which may be of any suitable material, as for example, cork. The float has the opening here shown in the form of a radial slot 53 for receiving the pipe 40'and the lower end of the fitting 17. Secured on the float by pins 54 and extending across the slot is the plate 55 whose outer end hinges around the pin 56 supported by and between the brackets 5() and 51` so that the float may swing verticallyv around the, pin as a pivot. At its inner end the lplate supports the pin 57 on which hinges at its lower end the strut 58, this strut at its upper end being deflected inwardly and provided with thel opening 59 for receiving the valve stem 47 belowthe abutment nut 48.

1When the oil in the reservoir 5 is below a certain levelv the weight of the float 52 act ingvon the strut or link 58 will cause the check valve 43 to be held down against its seat to close the passageway 44. 'lhe pipe 33 being connected with the impulse mechanism` each impulse will act against the diaphragm 14 against the resistance of the spring 19. 1Vith each impulse the diaphragm is depressed, and with it, the pedestal 25 to permit the ball valve 24 to engage with the seat 29 and thereby shut off any further inflow from the impulse mechanism. Also when the diaphragm is being depressed the vent 34 is opened and part of the impulse medium will escape, the adjustment with reference to the spring 19, vent 35 and other parts being such that enough force is taken from. each impulse to depress the diaphragm without straining it. AWhen the impulse effort is released from the diaphragm, the spring' 19 restores it to upper position and such upward movement of the diaphragm causes suction effect in the chamber 16. raising ot' the check valve 39, andthe drawing of oil from the main tank through the pipe 40 and into the chamber 16. During each impulse the oil ac`1 cumulated in the chamber 16 is forced outwardly through the passageway 44, past the check valve 43 and into the reservoir 5 through the outlet 45. Such intermittent charging of fuel into the reservoir goes on until the fuel reaches a certain, level` the check valve 43 being free to vibrate vertically to close the passageway 44 during suction in the chamber 16 and to permit the outflow of fuel during pressure in the cham ber 16. However, when the level of the Liliana@ fuel rises above a certain limit the float .52 will swing upwardly about its pivot 56 thereby raising the strut. 58, and as the float continues to swing upwardly, the upper end of the strut' will encounter the abutment nut 48 and the check valve 43 will be raised off its seat, so that it can no longer function to Qglose the passageway 44 during suction effort in the chamber 16.1Vhenever/the diaphragm is vthen raised, the suctionefl'ect is prevented from drawing oil into the chamber 16 and spends itself entirely in drawing air through the ventv 60 formed in the side of the reservoir 5. 11n other words` whenever the oil lever passes beyond a certain predetermined limit, the check valve 43 is incapacitated and no oil can be drawn into the chamber 16 and fed to the reservoir 5. However, as oil is used in the carburetor, this `oil flowing from the reservoir to passageway 9, the level in the reservoir drops and the float can again swing down to release the check valve 43 and permitit to operate. rllhe reservoir 5 is thus kept well supplied with oil but overflow is prevented.

By positively supporting ithe float yet permitting it to swing freely to control the check valve, the float is held away from the pipe 40 and fitting 17 and also the walls of the reservoir 5 and its operation cannot be interfered with as might be the case if the float were free as in other structures where it might bind at times and prevent efficient control of the valve mechanism. rllhe strut 58 is also free to move, that is, it can swing freely on its pivot 57 and the opening 59 at its upper end is sufficiently larger than the valve stem to prevent binding. 'lhe check valve 43 is therefore never hampered or impeded in any of its movements no matter at what angle the reservoir 5 is tipped during ordinary running of a vehicle and also when the float is raised suliciently to cause raising of the check valve, the valve willnot be strained. lhe abutment screw 48 being adjustableon the check valve stem` adjust-l ment can be made for the maximum height of fuel inthe reservoir at which the check valve will be incapacitated and further feed of fuel to the reservoir stopped.

llpon return ofthe diaphragm to upward position by the spring l9`` any accumulated air or gas in the upper diaphragm space is blown out through the vent 34. 1t' any ou.y or other matter is carried into such diaphragmspace during the impulses, such`oil or matter is blown out through the vent and prevented from accumulating.

My improved feed. apparatus is very simple and can be inexpensively manufactured while at the same time, it operates most efficiently under all ordinary travel or movement of a vehicle.

l claim as follows:

1. ln a fuel feed mechanism of the class described, the combination of a reservoir, a fitting within said reservoir providing a fuel chamber, a conduit for leading fuel Ito said chamber from the exterior of the reservoir, an inlet check valve at the entrance to said chamber, said chamber having an outlet to the reservoir, a check valve controlling said outlet, means for alternately raising and lowering the pressure in said chamber, decreased pressure causing fuel to be drawn into said chamber past said inlet check valve and increasing pressure causing expulsion of fluid from said chamber' `past the outlet check valve into said reservoir, a float member surrounding said. fitting and hinged thereto to swing vertically, anda link connecting between said ioat memberl and said Aoutlet check valve for holdingsaid check valve off itsseat when the float member is raised by the fuel in said reservoir.

2. In fuel feed apparatus of the class described, the combination of a reservoir. an impulse device at the top of said reservoir having aV diaphragm, means for reciprocating said diaphragm to cause alternately increase and decrease of pressure, a fitting within the reservoir connected with the lower diaphragm chamber and having a chamber subjected. to such increase and decrease of ressure, a duct extending to said chamber from the exterior of the reservoir, an inlet check valve controlling the inlet to said chamber from said duct, there being an outlet from said chamber to said reservoir,I an .outlet check valve for controlling said outlet, said outlet check valve responding normally to the increase and decrease of pressure in said chamber whereby fuel is reservoir providing a fuel space, a connecdrawn into .the chamber and expelled there'- from in said reservoir, a float member in said reservoir, means entirelyindependent of said outflow check valve for supporting and positively guiding the movement of said fioat with chan es in the level of fuel. in said reservoir, and a connection'between said 'fioat and said outflow check valve for causing said valve to bey raised olf its seat and thereby incapacitated when the fuel reaches a certain level' in saidreservoir.

3. In fuel supply apparatus 'of the class described. the combination of a reservoir having an outlet for fuel, a fitting in said tion between said space and the exterior of said reservoir for the flow 'of fuel to said space from a supply source, means for alternately increasing and decreasingthe pressure in said space, a-check valve at the inlet to said chamber, there being an outow passageway from saidsspace to the reservoir, a check valve controlling the outlet passageway from said space, said check valve normally `responding to said changes in pressure to cause fuel to be drawn into said space and expelled to said reservoir, said fitting havon said fitting to swing vertically with the change of fuel level in said reservoir, and a strut connecting between said float and said valve stem for causing said valve to be raised off its seat when the fuel in the reservoir reaches a certain level. i

4. ln fuel supply apparatus of the class described, the combination of a reservoir having an outlet for fuel, a fitting in said reservoir providing a fuel space` a connection betwen said space and the exterior of said reservoir for the flow of fuel to said space from a supply source, means for alternately increasing and decreasing the pressure in'said space. a check valve at the inlet to said chamber, there being an outlet passageway from said space to the reservoir. a check valve normally responding to said changes in pressure .to cause fuel to be drawn into said space and expelled to said reservoir, an abutment on said valve, a float member hinged at one side to said fitting to swing vertically with the change of fuel level in said reservoir, and a strut lextending upwardly from said float into position' reservoir providing a fuel space, al connec-` tion between said space and the exterior of said reservoir for the flow of fuel to said space from a supply source, means for alterna-tely increasing and decreasing the; pressure in said space, a check valve at'the inlet to said chamber. therebeing an feutlet assageway from said space to the reser'volr, a'

check valve controlling the outlet passageway from said space, said check valve normallyresponding to said changes in pressure to cause fuel. to be drawn into said space and expelled to said reservoir, a stem on" said valve having an abut-menue float member hinged at one side to said fitting to swing vertically as the level of fuel changes, a strut extending upwardly from said float member and normally res'ting on said fitting to hold the float member in lower position,` said strut being below said abutment whereby-k` when said doat is raised it will engage with said abutment to raise said out- 'letvalve and hold itlfrom its seat tethereby incapacitate saidvalve until the -level of' the fuel again reaches normal: ln witness whereof, l hereunto subscribe my name this tenth day of September, A. D.

` WILLIAM J. missin,

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