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Патент USA US2404983

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July 30, 1946.
1.. PENGHLLY
2,@4,983
LIQUID FUEL PUMP
Filed July 12;, 1943
'/////4
my
Il
2 Sheets-Sheet l
:
IN VEN TOR.
July 30, I946,
L. PENGELL“!
LIQUID FUEL PUMP
Filed July 12, 1945
2 Sheets-$1199‘; 2
.%
zfA
WME"
W
5
INVENTOR
2,404,983
Patented July 30, 1946
UNITED STATES? Pr
O'FFIFCEI
2404,9233 '
LIQUID - FUEL BUM-P1‘ '
Lcwis'I’e‘n'gilly, ram 'Alto', cane?
Application July-12;‘ 1943; Serial-No‘. 494,298?
5 ‘ claims;
(or. 102-164);
1.
This-invention relatesto a liquid elevating- de-»
vice designed-primarily as a 'fuel pump for an
internal combustion engine;
One object of the invention is to provide a new
and improved device for elevating liquid, and
including a" pump adapted to produce pulsation
of-‘an air column connecting the pump with-a
source of liquid supply.
Another object of the invention is to provide
a simple and economically constructed pumping
device adapted for continuous operation in con
nection with an engine-for supplying vvliquid fuel
25
forgtogether with 8.? modi?ed valve- assembly -in'
the :tank :and‘ a-modi?ea~pump at the :engine.
Fig: ‘7 -is.--a- :vert-ical tsectional view - showing 1 the
pump: on~~ anren-larged scale-as compared ' with
Fig~,~:6:
Fig;:;8~'~~is~a,-'fvertica-l:sectional view» of the valve
chamber and-{associated parts located in the fuel
tank} showin'g;:this-strueture on an enlarged scale.
Fig;~9 is a?verticalsectionalr view; of an air-inlet
valveia-rra-nged irr-the air line-of -'-Fig.' 6.
While there is-shown-and-described-herein cer
tain speci?c structure ‘embodying;- the ~ invention,
thereto and arranged'to transmit pumping; ini
itj-will.—be~manifest~;to those-skilledjin the art
pulses to a‘ valve- structure in the- fuel. tank byv
means‘of-an air column connecting said'struc
of;the:partsmambeemadewithout departing from
ture with the vpumping device.
It is also'an object of ‘the invention to providev
is - not:-- limited:- -> to: the particular : forms; herein
a liquid elevating~ apparatus which includes a
shown andidescribedyexcept ' in Y so- far as indi
that --various- mo di?cations -> and rearrangements
the-:scopee'obthe invention-,- and that the same
cated-sb'y therappended ‘claims;
This 7'application- a; continuation-m-part of
my application Serial No;409;942‘,'_?led- September
an ‘air-pipe leading into said " structure“ together
3.11941; patented June-13;;l944, No. 2,351,064:
with a pump connected to deliver a’ series ‘ of
In the-construction illustrated-in Figs. 1,2 and
pressureimpulses to said air pipe‘ with alternat
3,-an~.internal~combustion‘ engine is designated
ing suction impulses, and means rendering-the
generally by thenumeral-l; and‘a tank contain
impulses effective principally in one direction for
ing-a supply-of .liquidfuehtherefor is'shown at
causing elevation of the-liquid into the delivery
2 in cross-section; The engine has ‘a carburetor
pipe.
3- wliich includes the-usual fuel ‘bowl’ and float
A further object/of the invention is to provide
valverwithin-the bowl: The acarburetort is con
a-pumping device of simple construction, together
with piping and check valves arrangedfor lifting 30 nected byvazfuel- delivery pipe {5 to a- valve chamber
assembl-yi-located- Within the fuel tank 2-near
liquid'fuel to- an engine carburetor and-adapted
thelbottom'ithereof; so-as torbenormally sub
for-continuous operation by the engine; but -ar
valve structure submerged in a supply of liquid
with a‘ delivery ‘pipe lea-ding therefrom; and with
ranged to automatically ‘cease supplying said fuel
when the carburetor is full, and to automatically
replenish the supply when the'level‘of fuel in
theicarburetor falls.
Other objects and advantages of theinvention
will appear'from the following description taken
in connection with the drawings in-which:
merged -;by;-the. liquid fuel‘;
with pumping mechanism and piping constructed
the-valve chamber assembly-5 in; the tank 2, and
A~pump-6- is associated withlthezengine' i so as
to be driven continuously thereby; when the en
gine -is--.-runrli_ng-,~ as; for example,- by means of
an eccentric 6“; winch may-be secured to the usual
cam-~ shaft of- the engine-the pump having a
pitman ?b-‘arranged-to be oscillated by said ec
Fig.- 1 is a schematic layout of ‘an internal com~ ~10 centric.
The pumpf? is connected by» an air pipe 1 to
bustion engine and a fuel tank therefor, together
saidzpump includes :a cylinder 8 with a piston 9
in accordance with this invention.
arrangedeto be; reciprocated therein by means of
Fig. 2 is a‘ vertical sectional view taken‘ ‘princi
pally-through the axis of the pump cylinder.- and 45 the-‘pitmanhBb. The piston 9 is'shown with an
showing ‘the pump ‘on an enlarged‘ scale;
annular 'groove ID at 'a~.s_elected position between
the topzand'bottom of the piston, and with a pas
sage-.1 I extendingg-from the groove orcha-nnel ID
to thealpper-:»end-of the piston‘, as seen in Fig. 2.
cated 'in'the fuel tank.
The: cylinder 8 is‘ provided with two spaced
Fig. 4 is a vertical sectional viewlsimilarito 50
ports 12eand: l3ein-its sidewall, the upper port
F1812, showihgamodi?ed pump construction‘.
Fig. 3 is a fragmentary elevation. partly: in
section through the valve chamber assembly‘lo
Fig. 5 is a vertical sectional view showing an‘
other'mcdi?cation of the pump structure."
Fig.‘ 6f-is a second schematic-layout showingg-an
lz~beingianiairinlet and’ the lower port l3-being
a pressure-outlet to which>the pipe -1 is connected
for delivery of.-air impulsesto the-valve assembly
internal combustion engine and-‘fuel tank there. 6.5 5 ~ in -'the :fuelrrtank; A passage (4 connects, the
2,404,983
3
piston operates through its full stroke to deliver
a pressure impulse to the air-line ‘I, the result is
valve l5 which is held normally closed by means
of a spring [5“. The seat member 15’ for said
valve I 5 is threaded for axial adjustment whereby
the tension of the spring l5a may be varied as
desired.
a succession or series of impulses, which are ef
fective principally in one direction, along the air—
line 1, and for elevating liquid from the chamber
5 into the delivery pipe 4. Particularly when the
pump operates at relatively high speed, as it does
The valve chamber 5 includes vertically spaced‘
check valves [6 and H therein, the valve l5 open; _.
ing inwardly with respect to the interiorof. the}
in connectionwith aninternalycombustion en
10
chamber, and the valve l1 opening outwardly
with relation thereto and controlling the delivery -
of liquid from the chamber 5 to the fuel delivery
pipe 4, which has a terminal portion 4'1 within '
the chamber 5. Both the valves l6 and H are
normally held seated by springs, as shown in Fig.
3, and the fuel inlet controlled bythe valve i6 is
preferably provided with a filter screen 18., .
4.
tion stroke, whereas, in the opposite direction, the
ports l2 and 13, as shown, and the air inlet port
I2 is provided with an inwardly opening check
.
ginefof the;autornfotive'étype;v there
a, tendency
for some of the air in the pipe 1 to‘be ‘passed into
the liquid in the chamber 5 and to be discharged
therewith. This would operate to rarefy the air
in the line ‘I, but any such loss of air is at once
replaced .by way of the check valve l5 and pas
sage l4 during the suction stroke of the piston,
because with the air in the pipe 1 rare?ed to any
extent, the suction produced by the piston will
Whenever the engine I is running, the piston ' reach a higher value than the spring l5a can re
9 reciprocates in the pump cylinder 8. On the 20 sist, and atmospheric pressure acting upon the
valve 15 will open it to supply air to replace that
down-stroke of the piston 9, suction is createdin
which has been mixed with the liquid fuel and
the cylinder head until the channel In in the pis
delivered from the chamber 5 therewith.
ton registers with the port 13, thus momentarily
Fig. 4 shows a modi?ed form of pump in which
applying the suction through the passage II and
the cylinder 29 is connected to the air-line l
through the air-line l to assist in lifting the bot
through an outlet port 2|. The piston 22 is
tom check valve IS in the chamber 5 and allow
formed with a passage 23 extending from the
lng fuel to flow into the chamber; but the force
top wall of the piston and through the side wall
of this suction is limited by ‘the adjustment of ‘the
thereof for registration with an air supply port
spring i5“ which holds the check valve l5 seated,
and said valve will open to admit air at atmos 30 24 in the side of the cylinder 20 when the piston
reaches the lower limit of its stroke. Thus, at
pheric pressure whenever the force of the suction
each suction str‘oke, atmospheric air is supplied
exceeds the strength of the spring 15“. On the
to the‘ cylinder in whatever quantity is required
up-stroke of the piston 9, however, the valve l5
to replace any loss from the air-line 1, and each
remains seated, and the stroke is employed to
compress air in the upper portion of the cylinder 35 pressure stroke is thus fully effective to pro
vide the desired pulsation in the air column in
8. When the groove or channel l0 registers with
the pipe ‘I for lifting the check valve H and
the port l3, this pressure is applied suddenly to
passing fuel from the chamber 5 into the de
the air column in the pipe- ‘I, forcing the check
livery pipe 4. With this arrangement, no check
valve H to open and lifting a portion of the fuel
in the chamber 5 upwardly and past said check 40 valve need be provided in the air intake for the
cylinder 20, since the port 12 is never uncovered,
valve, into the delivery pipe 4.
I
except at the extreme limit of piston travel, and
The action just described is repeated with suc
this port is closed substantially at the beginning
cessive strokes of the piston, with the result that
of the pressure stroke.
'
the fuel is elevated, step by step, through the pipe
Fig. 5 shows a modi?ed form of pump suitable
4, and delivered to the carburetor 3.
.
.
for mounting in the side‘ wall of the engine
The spring on check valve I6 is relatively light,
crank case adjacent the position of the cam shaft
so that when the pump is not in operation, the
25 therein, which is shown with an eccentric 25
valve chamber 5 and the lower end of the delivery
operating against a stem 21 on the end of the
pipe 4 will tend to ?ll with liquid, to a height sub
stantially equal to the level of liquid in the tank 50 piston. The cylinder 28 is indicated as integral
with the side wall 29 of the engine casting, and
2, However, when the fuel is being consumed
is provided with an applied head 30 having a
rapidly by the engine I, the intermittent suction
central port 3| into which the air-line 1 is con
in the pipe 4 is helpful in insuring opening of the
nected. The head 30 includes a pocket 32 which
valve [6 to maintain a su?icient amount of fuel
may be of smaller diameter than the interior
within the chamber 5.
>
of the cylinder 28, and accommodates a spring
The provision of the air inlet port l2 and check
33 coiled about a guide extension 34 on the end
valve l5 operates to limit the suction produced by
of the hollow piston 35, the spring 33 serving to
the pump to considerably less than that corre
maintain contact of the stem 21 with the oper
sponding to a full piston stroke, and this suction
ating eccentric 26. This pump may be ‘provided
is at no time suihcient to lift the liquid into the
with air inlet facilities, either of the type shown
air-line ‘l to a height more than slightly above
in Fig. 2 or in accordance with the arrangement
the level of fuel in the tank. Even if the car
shown in Fig. 4, but, as illustrated in Fig. 5, the
buretor is filled, and its ?oat valve prevents the
piston35
is not provided with any port or passage,
further delivery of fuel through the pipe 4, the
continued operation of the pump will not suck 6
the fuel above the said level in the pipe 1. How
ever, as a precaution, and particularly when the
system is installed on a vehicle which may not
always travel on a level road, I prefer to provide
an inverted syphon in the air-line ‘I by extending
the pipe for some distance above the fuel tank
in excess of that through which the suction effect
could be operative, as shown'at ‘la in Fig. 1.- -
as in said structures, and is intended for use with
an air supply valve arranged in the line 1 in a
manner about to be described.
_
Fig. 6 shows a layout somewhat similar ,to that
of Fig. 1, but in which the particular pump il
lustrated is of modi?ed construction, and the
valve chamber in the fuel tank also includes some
features not found in that of Fig. 3; and in this
arrangement the air lost by admixture with the
fuel in the pumping operation is replaced by
Since the cylinder 8 is thus vented to the at.
mosphere before the piston completes its full suc 75 means of an air inlet valve connected into the
5
6
ai'rzuile- 1; as showman-4'01 ' Air engine is- con-
loweri'end' wall-‘oflt-helchainber- 45.- Thex-valve
ventionally"illustrated‘at’41, with a fuel supply
tank at’liz‘ and‘a carburetor at‘ 43." A' delivery
by 5a ‘sprin'gJIG'I , which is: shown eonveniently'idisa
disk lis' ‘seated? iupon-ia-supportingiidisk- 66' carried ‘
posec'llin anffanhuiarspaceiarouneltne: inlet screen
63.i Alcen'ti‘al-openingi'iirl'theldislolli?’ is de?ned
by- an upwardly? projecting annular flangev 69
pipe“ 44' extends'fr'om ‘the ‘ valve chamber assem
bly'l 5;’ and"‘a‘puhip‘is"shown"at “applied to the
sidewall of ‘the‘cran‘k casev for‘a'ctuation by a
which 1forms' the inlet passage and provides the
seat iforl'the- inlet-vall'le-‘G?. With this- arrange
mentj~wheneverithe‘pressure in-the'line ‘l exceeds
the tensiono-fi the-spring 161, this'pressure trans
mitted through? thel chamber! 45‘ will depress-the~
reliefl vault/e165’ sol that- the‘ excess‘ of air ‘may
escape through thescreen ‘681‘in'to‘ the‘ tank; 'This
will teh'di'to'produceisoinelturbulencelin the liquid
adjacentTthe-linlet to the'=ch‘amber1'45,:with the
resulti‘th'a’tlthe air'Yimthis-vicinity? will ?nd its
way't6'v'the1air dame-#62 ~as1'the’liquidi is pumped
up1"ir’ito9_th€<cha'nibeif"45; and"- will I-th?s lservel to
cam'or‘eccen't'r'i’c Month‘e'cam' shaft of the en
gine.
The'p'ump' ‘46 is 'shownin'gFigJI as including a
cylinder‘ 48“having“anfoutlet‘ 49, at one end of
which’. the". air-line” l i is" connected.‘ ‘The ‘flange
5 0 "at‘the' other: ‘end ‘of'thepylnder‘ is bolted to ‘the
side wall 5' of ”the"‘engin‘e',' indicated ' at ‘ 4 l ,- and at
this'end ‘of ‘thecylinder‘there ‘is "provided a guide
5| for the piston rod 52, which is'se'cured 'ii'rthe
eh'd'wall of ‘the piston" 5-3.1 A spring-54 is coiled
about .the" outer-‘end ip'ortion'of the‘ piston ‘)rod S’l
and‘freactsbetween'said guide 5| and ahead 55
on" ther‘old.l The“h‘ea‘cl 55:’is engage'd'by' a ec
centric‘ 58"01'1" the'cam'shaft‘filof the engine, as
maintain-‘the’- d‘esi'redl air -‘ cushion in l the-dome 6 2
so foi" facilitating-‘the? new oil liquid?» through- the
seen‘inv
7;‘ but: the stroke" of" the piston is
limi'ted‘.by"_rf1ean's of‘ a' vstop ‘collar-“58 on‘ the pis
ton ' rod ‘52",’ said" collar abutting the'g‘uide mem
ber 51 to‘ provide clearance: at 59*‘b’etW-eenthe
head 55" and' the'e'ccentrici at.‘ This allows; a
brief interval ‘at the :en‘dv of 'th'e'stroke; permitting
the valves in“the"'fu'el' elevating device‘ to'oper~
ate toybette'r‘ advantage,‘ so as to‘ perform more
ef?ciently'at high speed; '
'
pipe" 4‘. -
With lreferefi'c'eito'the clearance shown'ati59 in
Figzl'l; betweenitne: cam 561 and the head ‘of. the
piston '-r0di'52’,5 it willl-bei'under'stood that the delay
interval effected byline-ans of this clearance might
alsobei'seeured by making theicorresponding por
tion'- - of f‘th'e icaniil concentric ' with ‘ its ‘ axis of rota
tion; Thereiis’also'shown in Fig. '7, near the
rightmand'end‘of the’lpump‘ cylinder 48, a re
The pumpingchamb'er' E5; whi'ch‘is shown in '1 strioted v'portT 4821' 1 for-ined'iin the side wall of I the
cylinder and pb‘siti'OnedTtOI' be ‘uncovered by the
detail in‘Fig. 8; includes an inlet-valve 69 vseat
piston .a't'the'iendfofits‘suction stroke. If the
ing‘ ‘outwardly ‘with’ respect ‘ to vthe chamber, and
check valve 40 is employed, this port willfordi
an outlet wave 6! iseating'inwardly‘witlr relation
naruy b'e-‘plug'gedup‘,’ but, if preferred, this‘ inlet
t'o'said chamber.‘ These valves are'held normally
seated {by th’eir'sp'rings, as'seen in
Bfand the 5, port’- maybe utilizedilin place‘of the" air'inlet
cheeldv'alv‘e'ffw tfi‘insurei-replacement‘ of such
pressure impulsetransmitted through the‘ pipe 1
auras-maybe ‘ lost‘- from’! the" air‘ colunin' ' in‘ ‘ the
operates to open ‘the’ valve 6| and to pass liquid
pipe 1 by absorption in the liquid fuel, or other
fuel from the chamber $5 above the valve, in the
wise.
same manner as with the structure of Fig. 3. But
In most pumping devices of this general char
to improve the operation an air dome 62 is formed 40
in the assembly surrounding the terminal por
tion 64 of the delivery pipe 4, said terminal por
tion being shown as an integral part of the cast
chamber 45. Any air which is admixed with the
liquid fuel, either in the tank Or by virtue of the ,
application of the air column in the line 1 to the
acter for moving liquid fuel, the di?iculty com
monly known as “vapor lock” is frequently en
countered; but in the structures herein disclosed
this trouble has been overcome partly by the
automatic replenishment of air as required in
the pressure line 7, and also by virtue of the relief
valve provided at 65, which avoids the accumu
liquid in the chamber 45, tends to free itself from
lation of excessive pressure in the line. Frequent
the liquid as the latter passes the valve 6i, and to
accumulate in the air dome 62. This provides
operation of the air inlet valve IE or 10 and of
an air cushion against which the pumping pres 50 the valve 85 tends to disturb or agitate the air
sure operates, and which helps to force the liquid
column sufficiently to insure its proper function
ing at all times.
upwardly through the delivery pipe 4 and to
maintain a reasonably uniform flow therethrough,
I claim:
damping out the pulsations produced by the op
1. In a liquid elevating system which includes
eration of the pump at 46.
_
a liquid supply, a chamber having an inlet sub
Replacement of air lost from the air-lme 'l
merged therein and a delivery pipe leading up
in the pumping operation is effected by means of
wardly therefrom, said chamber comprising an
outer cylindrical body having a top wall, an inner
the check valve device 45, which includes a grav
cylinder suspended in the outer cylinder in spaced
ity seated disk valve ‘H1 and an air inlet port "H
provided with a regulating screw “I2 by which 60 relation thereto and having an outlet port in
its lower end, a delivery tube connected with said
the capacity of the port may be varied, as may
delivery pipe and depending from the top wall
be found desirable in view of the particular in
of the outer cylinder within the inner cylinder,
stallation of the apparatus. Thus, upon each
said tube terminating in spaced relation to said
suction stroke of the pump 46, if the air column
in the pipe ‘i has been depleted by leakage or 65 outlet port, an outlet, valve disk seated over said
port, a coil spring supported on the lower end of
by loss of air absorbed in the liquid fuel, this
said tube and holding the outlet valve yieldingly
leakage or loss will be replaced by the automatic
to its seat, an outwardly seating valve for the
opening of the check valve iii, admitting air
submerged inlet of the chamber, and an air pipe
through the port l'l during the brief suction in
70 leading into said chamber with pumping means
terval.
supplying alternate suction and pressure impulses
This substantially continuous addition of air to
to actuate said valves and force liquid from the
the line 1 may sometimes tend to build up a
chamber into the delivery pipe.
pressure in _the line in excess of that which is
2. In a liquid elevating system which includes
desirable, and such pressure is automatically re
lieved by means of a valve 65 which forms the 75 a liquid supply, a chamber having an inlet sub
2,404,983
7
8
.
an air pipe leading to said chamber, a pump com
prising a cylinder and a piston reciprocable there
in creating alternate pressure and suction im
pulses, said cylinder having a continuously open
port into which theair pipe is connected and
through which pressure and suction impulses are
transmitted to said chamber to actuate the valves
thereof and elevate liquid therefrom through the
merged therein and a delivery pipe leading up-'
wardly therefrom, said chamber comprising an
outer cylindrical body having a top wall, an inner
cylinder suspended in the outer cylinder in spaced
relation thereto and having an outlet port in its
lower end, a delivery tube connected with said
delivery pipe and depending from the top wall
of the outer cylinder within the inner cylinder,
said tube terminating in spaced relation to said
delivery pipe, means automatically supplying air
outlet port, an outlet valve disk seated over said 10 to the air pipe during the suction impulses to
replace air expelled therefrom by the pressure
port, a coil spring supported on the lower end of
impulses, and means providing a delay in the
reciprocation of the piston at the end of each
suction stroke to facilitate operation of the valves
said tube and holding the outlet valve yieldingly
to its seat, a bottom wall for said chamber in
which the said submerged inlet is located directly
below said outlet port with an upstanding annu
lar ?ange surrounding said inlet as a ‘valve seat
therefor, an inlet valve disk on said seat, an
annular ?ange depending from the inner cylinder
in spaced relation'to said inlet valve disk with
a spring coiled about said ?ange and holding the
inlet valve yieldingly seated, and an air pipe
leading into said chamber with pumping means
supplying alternate suction and pressure impulses
to actuate said valves and force liquid from the
chamber into the delivery pipe.
3. In a liquid elevating system as de?ned in
claim 2, said outer cylinder having a downwardly
facing annular shoulder against which said bot
tom wall is normally seated, and spring means
holding said bottom wall to said seat, whereby
15
in said chamber.
.
-
5. In a liquid elevating system which includes
a chamber having an outwardly seating inlet
valve and an inwardly seating outlet valve, a
delivery pipe controlled by the latter valve and
20 an air pipe leading to said chamber, a pump com
prising a cylinder and a piston reciprocable there
in creating alternate pressure and suction im
pulses, said cylinder having a continuously open
port into which the air pipe is connected and
25 through which pressure and suction impulses are
transmitted to said chamber to actuate the valves
thereof and elevate liquid therefrom through the
delivery pipe, means automatically supplying air
to the air pipe during the suction impulses to
30 replace air expelled therefrom by the pressure
impulses, means to reciprocate the piston com
said bottom wall serves as a relief valve adapted
to yield to release excessive air pressure in the
prising a cam for driving it in one direction and
spring means to return it, said cam being arranged
to provide a delay in the reciprocation of the
4. In a liquid elevating system which includes
a chamber having an outwardly seating inlet 35 piston at the end of each suction stroke to facil
itate actuation of the valves in said chamber.
valve and an inwardly seating outlet valve, a
LEWIS PENGILLY.
delivery pipe controlled by the latter valvegand
chamber.
‘
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