US1739944A - Pump - Google Patents

Description

Dec. 17, 1929.

C. H. BRAsELToN ET A1.

PUMP

Original Filed Feb. 20, 1922 IN1/Mon M 1Q' Wfmmw y MMATTORNEY Patented Dec. 17, 1929 CHESTER H. BnAsnLToN, or New Yoan, AND razen. B. MAcLAnnn, orifrALBAfNEW YORK; SAID MAGLAREN ASSIGNOR T SAID BRASELTON v v PUMP Application filed February 20, l1922; Serial 110.537,682. Renewed September 14, 182:8. A

This invention relates to improvements in liquid fuel-feed apparatus of the type adapted to be operated by vibrations imparted to the device, and has Vfor its principal object the provision of vibration-operated means for supplying liquid fuel for internal combustion engines from a container at a lower level than the engine carburetor to a tank mounted above the carburetor level..

Other: objects and advantages will be apparent from the following description in which reference is had to the' accompanying drawing forming a part of this specication and in which similar reference numerals designatesimilar parts throughout the several views.y I

In the drawings Figure l is a diagram matic side elevation of anA automobile equipped' with our improved apparatus.

Y' Figure Il is a central longitudinal section through the auxiliary tank and vibration-operated pumping mechanism.

Referring now to the 'drawings the numeral designates the chassis of the automobile having the usual wheels y6, engine 7, rear fuel supply tank 8, carburetor 9, and our improved Y auxiliary tank housing thepumping mechanism. The auxiliary tank 10 is connected with the rear supply tank l8 bymeans of a feed pipe 11 and with the carburetor 9.y by the feed vpipe 12. The tank 1() is preferably cylindrical and is with an opening 13 about which is aligned a threaded collar 14' for the reception of a valve mechanism 15 in the lower extremity of which the feed pipe 11 is adapted to be connected. The feed pipe 12 is connected at one extremity to thecarburetor 9 and at the other extremity with the apertured bushing 16 fitted into the door of the tank with its inner extremity raised a slight distance above the floor to prevent admission of sediment, water, etc. that might collect inthe tank 10 into the aperture.. rlhe valve 1,5 may be of any desired construction, and it is 'to' be understood that the valve herein illustrated is for purposes of exemplilication only. As herein shown a ball 17 seats by its own-weight and with the aid of the auxiliary spring 18 against the upper extremity of the central aperture 19 provided in its lower wallof the valve. The chamber surrounding the .ball 17 is connected through a series of small apertures 2O with the interior of the tank 10. vViththis construction the ball 17 `pre-` vents the flow of liquid from the auxiliary tank 10 to the rear tankS but may be raised by suction so as to admit fuel from the supply tank 8 into the auxiliary tank. To secure the desired suction we' preferably provide a bellows 21 herein shown as constructedof a series of centrally apertured discssecured in tohave an airtight fit.' .Adjacent pairs are lconnected by soldering or the like in proximity tothe apertures through the discs. The lowermost disc is securely held in contact with the floor of the tank 10 by means of a Vcollar 22 secured by bolts 23 or any other desired. manner. The uppermost ldisc ofthe vpairs with the outer edges of each pair sol` Y dered together. or otherwise fastened so as bellows is connected with the plunger 24 of the inertia member 25 so that vibratorymovements of the inertia member vwill be `directly. imparted to the bellows apertures. This downward movement of the inertia member 25 will tend to press the discs2l together exerting a. pressure upon a ball 17 to more firmly seat the'same,-while an upward movement of the inertia member will elongate the bellows apparatus so as to create a suction whichraises the ball 17 from its seat and draws in liquid from the supply tank 8 through the feed pipe 11 into the bellows device. rllhe next downwardstroke of the inertia vmember will compress the bellows and Aeject therliquid therein throughthe valve 26 formed att-he lower end of the plunger 24. The valve26 may be of any desired form and is *herein` For convenience in constructionv the upper n aperture is formed merely as a slot cut through the lower portionv of the plunger 24 and the ball chamber is a circular enlargement of the lower extremity of the slot.

The lower aperture 28 isformed in a separate member which may bethreaded or otherwise secured updn the plunger 24. The illustrated construction provides a threaded lower extremity on the plunger 24 of lesser diameter l thantlie remainder thereof, thereby giving a shoulder against which the upper disc of the bellows 2l may be pressedby the turningof the apertured cap on the threaded projection.

The inertia member 25 preferably enclosless diameter than the interior of the-tank- 10 which is normally held in raised position by a main spring extending between the lower surface. of the weight and the floor ofV ity centrally lofr the weight 25 and with its upperporti'on projecting through the central aperture 33 of the cap 34. The aperture 33 i'sof'slightly'greater diameter than the guide rod' and the leaf springs 3l may bend sufficiently to enable a substantially accurate centering of theentire pumping mechanism. To aid' in such centering we preferably construct the cap 34 witha' raised central portion having lan exterior iange 35 adaptedfto seat upon the head 36 formed by bending the upper portion of the tank' l() into substantially, the position shown in Figure II. Exteriorly Aof the bead 36-said tank portion is'formed'with the extension flange 37 adapted to be accurately machined into aztruecircle with the center of the tank rasV its center; The cap flange 35 isv further formedlwithath-e down turned circular flange 38 ythe interiorv wall of which may also he accurately .machined` so thatit will snugly fit'. over the periphery of the tankv flange 37. This'construction also lends itself to convenient assembly. Washers-39d cork or any. desired material being inserted above and below the flangeV 37 and held in place by the same screws i0 that lock the capy 34 in position..

The operation of our improved.` device is believed'to be apparent from the foregoing description.

constant vibration which moves the tank 10 relatively to the inertia mechanism 25, which because of its relatively great mass is slower to vibrateand tends to remain in a fixed posit-ion; The upward movement of the tank relatively to the inertia mechanism will tend to compress thebellows mechanism, whilea downwardv movement of the tank will tend to elongate the bellows so as to create a suction and draw liquid fuel from the supply tank Sf-into the auxiliary tank 10. The next ing a relatively large weight of but slightlyl Y, As a vehicle equipped there` with travels over the road itis subjected to upward movement of the tank will tend to eject a portion of such liquid from the bellows into the tank 10. This drawing in of liquid will continue until the tank l() is filled 4to a height substantially the same as that shown in Figurev II, whereuponv the' liquid-y almost entirely fills the space between the periphery of the weight25 and the wall of the tank. In lthis position thefriction is sufficienttoprevente relative movement of the tank wall and the inertia element and further vibrations will merely move the two mechanisms simultaneously. V Liquid from the tank 10 will continue to feediby gravity through the supply pipe l2 into the carburetor 9Jand when the engine consumption has beensuffi'cient to lower `th-eliquidlevel in the tankl() to a height below the Weight25 the relative motions of the tank l0 and the inertia mechanism will again vdraw out liquid from the supply tank 8, thus maintainingthe level ofthexfuelin-the auxiliary tank` at substantially constant level. n

y This invention is aemodification offthefinvention illustrated and describedI in our` copendingapplication, Serial No. 533,493,1iled Februarytl, 1922.

* Havingl describedour invention what we elaimis: v

1;. In fuelifeed apparatus a supply tankan auxiliary tank at a higher level thanthe supply tank, vibration operated pumping mechanism for'drawing liquid from the supply tankintothe auxiliary tank, an inertia mechanism' freely mounted within the auxiliary tankvalves suitablyarrangedlto admit liquid into the auxiliary tankfwhenfrelative motions of said'tank and the inertia mechanismiare imparted, and means forcentering lthe inertia mechanism comprising aA plurality of crossed. leaf springs having-` aligned apertures at. their intersections,`said inertia mechanismV having aV portion projecting throughl'saidfaligned apertures;

2.*In fuel feed apparatus a supply tank., anauxiliarytank ata higher level than the supply-tank, an'dvibration operated pumping mechanism for drawingliquid from theV supply tank into the auxiliary tank, including an inertia mechanism freely. movable within the auxiliary tank, a spring normally spacing theinertia mechanism vfrom the floor of saidtank, and'means for damping the'vibrations of said inertia mechanism comprising aplurality of crossed leafl springs secured to the tank and having aligned apertures at their intersections, said inertia mechanism having a guide "rod arranged to project through said apertures.. Iny testimony whereof, we affix our signatures.

CHESTER H. BRASELTON. FRED. B. MACLAREN,

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