US1788961A - Vacuum fuel-feeding device - Google Patents

Description

Jan. 13, 1931. T. F. SPACKMAN 1,788,961

VACUUM FUEL FEEDING DEVICE Filed July 15. 1929 110%222021 ams fi ZZZZd Z.

- Patented Jan. 13, 1931 i mama's FR DE ICK sPAoKMAmror; .cHIoAGo, LLINOIS, Assielvo'n msrawAmwannnn; conronar'roiv, or CHICAGO, ILLI No s, alcoarouerron or VIRGINIA P vacuniurunL-rnnnnve.nnvrcn a fuel to an internal 'combu'stion'engine utilizg ing engine suction'for producing vacuumto lift the fuel from the'lower source'toa recep tacle from which it may be delivered to the carbureter. It consists in the elements and features of construction shown anddescribed and as indicated in the claims.

In the drawings forms, r 7

Figure 2 is a similar V ew of the same 1n modlfied form, r

In the drawings, in both'forms shown, the outer shell forming the reservechamber is indicated at A the inner,'upper 'vacuumchamber is shown at B, havingsuctionconuection, 20, fuel inlet, 21and fuel'dis'charge to the reserve chamberat '22, controlled by the check valve, C. Referring to thelform shown in Figure 1: In the vacuum chamber there is mounted fixedly a cup, D, open at the top nearly at the top of the vacuum chamber, and having bottom outlet ports, 24E, 24,,ar-

ranged to be closed by a float valve device,F,

when the latter is buoyed by the liquid in the racuum-chamber rising. nearly to the ,level' of the bottom of the cup. In the cup there Y is a float F havin 'stem 'F extendin out 7 7 b 7 7 1 through the bottom of the cup in which the stem has an approximately llqllld tlgllt ht, and extending througha centralape'rture 1n the float valve, E, and carrying below said" flc-at' valve avalve, G, which, at what may be 'rei'err'edto as the normal position of the float, F,that is, when the cup, D, is emptied of liquid, isf arran ed to; seat at and close an opening, 26, in the bottom of the, vacuum chamber, constituting communication be-," tween the vacuum chamber and the fuel reserve chamber, independent of the fuel discharge port which is controlled by thecheck valve, C. The stem, F is extendeddo'wn through the opening, 26, and below the same is provided with a stop pin, 27, for limiting the rise ofthe float, F, in the cup. j Thereserve chamber has at the top the usual atmosphere vent port, 30. q I

the, bottom of thehcup, V a t alve, E, and the;lattersis;buoyed up- Figure 1 1s a vertical section ofan appara tus embodying the invention in .one of its j the latter and the cup willempty and the float will below- "the vacuum chamber connected with. a source of suction. and with 'readilybe. seen tobe that, starting withboth chambers empty and the vacuum chamber by the suction; and whenthe liquidfrises ;in

the vacuum chamber-nearly to-thelevel of against top; of the cup it will quickly overflow into:

fill the limited space. therein. 7 around the float, causingthe 'float :to be buoyed up and lift the valve, G, unclosing the port, '26, and admitting the atmospheric, pres-' sure and air which will bubble up-through the 1 liquid in the vacuum chamber-{ventingthe vacuum therein and causing'the liquid to be discharged therefrom pastthevalve, G, into in the'vacuum chamber outside the-cup,butfi the reserve chamber, and loweringtheclevel not emptying the cup until thelevel outside the latter has fallenbelow the, level of the",

bottom of the cup'f'ar enough tode-submerge a the flo-at valve, .E, andpermitit to fall so" as touncoverthe p0rts,1-24l, 24; and thereupon l ered, carrying the valve, G, down to its seat, closing the port, 26, cutting ofllthe atmos- ,pherlc pressure; whereuponcontinuously ad mitted suction will re-create' the vacuum in tions will bev repeated. 7

Referring to the form shown in Figure 2, it may be noticed that the cup, D, is upheld and the cycle of opera- 85 by a tubularsupport, D W-lllClI is connected at a post, 26*, in the bottom of the vacu um chamber corresponding to the port, 26,015 the form shown in Figure 1, and thereby thepass sage through said'tubular support leads,zdi. 'rectly from 'thereserve chamber into-the'cup' cavity; andthe valve, G, carried by-thefloat':

stemseats at the-upper end of'said passage; for controlling the port, 26*,

tutes the vent connection from the vacuum chamber, by way of the cup cavity,"with the v reserve chamberthrough which atmospheric pressure obtains access for venting the which constiri at i the bottom of the cup anjd closesnthe 7' ports, 24, 24; and when theleveliris'es'tothel vacuum in the vacuum chamber. In this form also thestem of the float and valve, Gr, extends down into the lower chamber and is provided with a stop, 27*, for limiting the rise of the float. In this -form the cup has bottom ports, 24*, corresponding to the ports 24, of the first form, these ports being'controlled by a float, E corresponding tothe float, E, of the first form; i I

The operation of the form shown in Figthat whenth'e'cup fills anathema, buoyed by the liquid, lifts the valve, Gynpeningthe vent communication with the lower cham: ber, the atmospheric pressure 'obtain's 'ac'cess to the vacuum chamberby way of the cup cavity, as 'above mentionedftlre air bubbling up-r through 'theliquid in the cup without from the vacuum chamber and to be held seated by suction in said chamber, the vacuum chamber having connection with a source of suction and connection for liquid supply from a lower source from which the same may be lifted by suction in the vacuum chamber, said vacuum chamber having at the lower part'a second port-,of communication with the reserve chamber in addition to said' discharge'po'rt; an upwardly, open cup mounted ure is substantially the same asthat of the, 1n the vacuumchamber; afloat in the cup and form shownin Figure 1, differing only in a valve carried. by the float Controlling the said second port and arranged. to be held 5 seated theweight of the float and to be lifted f or opening said port by the buoyant effort o f-the float when the cup is filled with l quid W P s-stemmed level h p, vmg atthe lowerpart a waste p'ortdischargin g in thefvacuu'rmchamber meansin; the vacuum:

causinganyi substantial discharge ofthe7chajinber ,controllingsaid; waste; port ar;

liquidf'cont'ent of the 'cupuntil the liquid level in the vacuum chamber falls below the submerged a-nd fall's,=opening the ports 24",

and permittingfthe cu'p to empty its liquid con-tent into the vacuumchamber from which it discharges past the valve, C, intofthe re serve chamber-( V l V V V ltwil lbe u n'derstood that the reserve 'cham'- beryB, maybe-filled with liquid to the level somewhat a=bove thelevelbf the bottom "of the:vacuum 'chamber, tlieliquid extending enterlthe ventpassage which is controlled by? theivalve,= Gr; biit it will be understood that this: will notpreve'nt atmosphericjpressure obtainingi'access by wayo'f the vent passage as described, whether that' pasisage' consists onlyof.the poi't,'26,"'as -in Figure 1, orflin i cludes,=asirIFigureQflhe cavity ofthe diaphragm stem and the*cavity of the'cup, or whether the pressure istransmitted, wholly j raagaigioizbe operated by change ofiliquid level'iinjsaid' vacuum chamber ;t0; i open' the j wastefportfwhen the liquid falls belowa pre -w determinedlow,level andclose said port when" the liquid rises a yeryshort-distance-above said low level. a 2. lne the construction defined in claim 1, the fio'at carried valye havinga stem extending through the port whichvit controls, anda stop onsaidstem below said port for limiting vthe upward movement of the fioatiinzthe cup. ln the construction definedinclaim- 1', the c p cavi y h ving communication with the reserv'e chamberindependentofits communication with the, vacuum chamber, and

f thevalve .controllingsaid communication beten-ed bathe ti hin th I l he, wi

the c upfbeing supported at a short distance ruction defined 'n claim 1,

f having the waste' poirt in the bottom, the "waste-p0 rt-controlling-v means being a float valve deviceginterposed between the cup bot tomandlthe bottom of the vacuum chamber. 5." In the construction defined in claim 1,

by airior-iin pa'rt'by liquid which m aybe'oo, the cup being tsuppor ted' rat a short distance cupyin'g. the passage through which pres? chamber, whether-the atmospheric pressure re'serve -chamber 'into the vacuum chaniber will be transmitted so as 7 to admit only" at mospheric air to the vacuum chaiiibe'r, or so as to :cause some liquid topassup from-the for relieving the vacuum.

I claim i V 1. A structure'for-the purpose indicated comprising in 'combination with a vacuum chamber and reserve chamber, the vacuuiir I chamber having a port for discharging into 4 1' the reservechamber, a valv'e controlling said ,above the bottomottheyacuum chamber and i having the wastejport in the, bottom, the

waste-port controlling means being a float valve device interposed ibelow the cup 'botabove'th'e'bottomof thevacuum chamber and;

tom; f a, tubular meinberglextending across the l vertical interyal between the cup'bottom and .1

v the vacuum chamber; bottom afiordi'ngpres- "sure communication between the, reserve v chamber and the ,cup cavity: and vacuum chamber, the ",floatli valve jdevice being apertured ffor engagingfand being P0811? oned and I I Intestimonyfwhereof, I have hereunto set I m handiatlCliicago, Illinois, this 12th day; of July, 1 ?29.' 1 Q ,r.

, r goiyias PACKMANQ Port d' ope ed by h rum"

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