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Патент USA US2380656

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July 31,
"'
c. J. LAUER ETAL
FUEL rim?
‘
2,380,656
'
Filedsept. 11, 1940
-
2 Sheets-Sheet l
Qtlel‘azz
L'aaet
& Qty ,5. 6010a”
‘
July 31, 1945.
2,380,656
'c. J. LAUER ETAL.
FUEL PUMP
2 Sheets-Sheet 2
Filed Sept; 11. 1940
W
_
v
'
,
Zhwentois
Q2/2201? ‘£62112!
LY 604%”
I
,
2,380,656
Patented July 31', i945
‘um'rap 5mm. PATENT‘I'OFFICE '
8,880.65‘
CarletonJ.liaues'andBoyLBewen,Filnt,Midn,,.
lotorscorporatiomlle
asslgnors. to General
troit, Miehqva corporation of Delaware
_
I . Application September 11, Ramses-la! No; 856.!“ .'
s Claims. .(CLMHZ)
cover member ll associatedwith a'fuelstra'inar
This invention relates to a fuel supply system
and sediment trap designatedas a whole by nu
for engines and more particularly-to the fuel sup
meral i1.‘ Also associated with the cover mem
ply system for the mine of a,v motor vehicle. '
is a'pump and motor assembly marked ll.
An obiect of the invention is to avoid the ‘con ''5 her
The ‘cover it has a passage 2| leading from its
version of liquid fuel into vapor in a supply sys
threaded end 28 where it is connected to the tank
tem using a pump in the conduit leading-from
the tank to the carburetor.
.
outle't it. A plug 2| separates this passaae from ‘
" a coaxial passage Tl. A passage 2' leads from
.
As another object the novel supply system uses
passage II to and throu'ah the bottom of the’
bearings of the motor which drives the pump, in cover ll. _A bowl ll, for the collection of sedi
ment and water fromthe fuel, is secured to the .
and the inventive idea'is embodied in a construc-,
underside .of the cover by conventional retaininl
tion wherein leakage and evaporation is avoided.
means including a bail. screw and nut assem- v
the fuel itself as the lubricating medium for the -
Many other objects and advantases will be~
come evident as one reads the description which
follows:
lnthe drawings:
bly 83. Between the‘bowi and‘the cover is a ?lter
15 screen II and a gasket 81. The cover has an
other longitudinal passage-‘3| terminating over
»
-
“ '
'
the bowl and from its end a vertical passage ‘ll <
Figure l is a vertical section through the novel
pump and sediment collectina chamber.
to extends to
bottom surface of the cover. It
will be seen from
3 that the ?lter screen is
Figure 2 is a section as indicated by line I-Ion I go ?tted around the openinls II and“ so that the
l'ilili'e 1.
fuel from the
enters the'bowl in the realm
Figure sis a section as indicated‘ by line s-t ' - below the screen.. Above the screen'is an opens
ofFigure 1.
Flame 4 is a section as'indicatedby
H' mg ‘I within the cover communicatinc with pass
. sage 21. It will be understood that any water, _
ofl'ialire
Figure 6l. isa sectionas
'
indicated
~
byline H ‘g5 and sediment in the fuel is separated from the
fuel by the expedientdescribed and that it coi
onFizure 2.
'
' Referring by numerals to the drawings,‘ there‘
is illustrated a fuel'tank marked II. This is in
' lects in the bottom of the bowl from which it can
' bereadily
.A motorremoved.
case II is secured
;.
beneath the' cover
-
tended to be the iuel reservoir mounted near the so by' fastening means" (rig. is). A pump sear
end of a motor vehicle. The fuel from this
bearlna casing 48 ?ts within the upper part of
is to be delivered to the carburetor and.
the case ll and is secured to the cover by fasten;
most installations; this means that the 'fuel.
ing means ll. neferring'arain to the cover, it
act be lifted for which purpose some ‘sort of
v will" be observed that at the end of passage 21:
5amp is required. ‘In many vehicles a variable as remote from passage ,43 is a passace it which
stroke pump is located‘ near the engine so that
its moving>parts maybe actuated by the'mov- 5' communicates with'a space‘ I! in the casing .40
leading to the pump chamber 51. Fromehamber
in parts of the emrine. Such pumps operate as‘ _ .l‘l
a pa'ssaee‘ ll extends upwardly and‘ opens into
a result of the creation of suction and the suc
being indicated.
egg
tion tends’to‘vaporize' the liquid.v The present
. the cover passage “,the opening
invention aims to avoid the creation‘ of anyap-f so by-numeral ll. The gear
'
preciable suction. In the drawings the- pump 1
I
,
has an openin;
-‘ which extends from the opening ti through the
shown‘islocatedinear the tank and‘the'outlet' ._
bottom wall thereof as shown-by dotted lines!!!
Fl‘. 1. At ll is a threaded opening at-the end of 7‘
llfromthetankisnearthebottomof-thetank. "
II for connection with a pipe for'convey- whereby thewsuction, if'any. developed by- the 45 p'assale
log liquid fuel from the pump to the carburetor. - '
pump located near the outlet of the tank is negj
' Within the pump chamber are pump gears'il‘and
ligible. The 'invention is not, limited‘ to‘. a con
‘d1. gear ‘I being driven byv an electric motor to
struction in which the fuel ?ows by gravity‘ to
referred to andv gear I‘! being an idler. 'On
the pump but it is intended that the positional -- be
ofgea'rcasina ll arepairsofbosses ‘i.
thepumpshallbesuchastominimiseth'esuc so theunderside
“audit. There is aisoaspherical-recess ‘l3 forv
tion required to draw the'fuel from the tank.
seating shearing". ‘ The electric motor by which,
Between‘the pump and the carburetor
the mm'p leafs are driven includes va fixed ?eld
will be subject to positlvep'ressure. 'l‘hepiunp-iis
driven by an electric motor as
assembly 11 heldinpositionbyspin ‘ll extendina
frounthe’base of the motor case. A
Theoutlstilfromthstsnkiseonneetedto'a llspacin‘ memberli'withinthemotorcaseispol- -
-
.2.
QMOSO
tionedbetweenthe'ileldassemblyandthegear
umature'isatthebottomoithecasatbereisno
assembly '8 irom‘whichextend spindles Is and-
age. Itisthereiore --- we
l'l- Spindle llextendsthro
ditionalsealingmeansatthebcaringashasbeen_
casing“. 'l‘hemotoralsoincludesanarmature .danger oilossotlubricatlng ediumi'romleak
bearing" ‘and
toprovide ad
at its end non-rotatably carries gear II. _The I done heretoiore when the motor was arranged
.bottomotthemotorcasehasaconcavedseatls abovethepumn 'Ihemoiorcaseisnotopento
iorthereceptionoiabearingtithror hwhich theairandevaporationlsthus avoided. This.
passesthesplndlesttheendoithesplndlebeing
in
‘contact with a thrust bearing II. Bearing 1.. too.helpstoinsureadequatalnbrication Itwill
08 takes the term 0! a hardened welch plug which
thus provided with self
.lssingbearingllisarstainerassemblyllsecured
as at‘llto bosses ll proiecting
sediment collecting bowl II. If this is neglected
andwater collects withinthemotorcaseitmav‘
be removed by unscrewing the plug Ill.
thebrushandcommutator
upwardly irom
thebottomwalloi'themotor case.
Asimilarre-'
tainerassembly ll’ torthebearing‘llissecured
tobosses‘lisAbrushassemblymarkedliisse
oi’ the motor case it will
notbercachedbyany.
waterwhich-doescollectinthemotorcase. With
the lowvoltage required for operation of the pump
there no danger oi’ short circuiting the motor
cm-edtobossesll. At Ill isa threaded plug for‘
draining the motorcase when occasion requires. ~ 20
Electrical connection is provided'at ill. An ex- .
‘should
water collect. ‘me only diiilcuity is from
ternal wire. not shown. is connected at this point reesing. Btalling oi the motor will not cause it ,
and communicates with an internal lead I“.
to burn out. As an added precaution. low ampere _
,,Within the sediment trap'a disc-shaped valve
may be ‘used. ‘me use of a gear pump with.
is‘? is adapted to be held asalnst a seat It‘! at
out valves insures quietness oi operation.
byaspring m. The
We claim:
.
1. In combination, a fuel tank of a motor vehi
cle and a conduit therefrom to supply the car
buretor oi' the cosine. said conduit having a~?rst
part and a second part, a iuel pump assembly 2
mounted between said ?rst part and said second
which are received within bosses ii'l formed on
the underside or the cover. The shell has open
ings in through which ?uid may pass and enter
the bowl when the valve disc is depressed by the
part oi’ the conduit, said assembly including a
_ motor case.
a motor and a superposed pump
pressure or liquid fuel and against the resilient 35 within said case, means forming a bypass be
tween the high and low pressure'sides oi! said
resistance or the spring.
pump, said pump having an outlet, means form
ing passages to deliver fuel from ‘said outlet to
the motor case where it serves to lubricate bear
lugs, to the second part of the conduit for sup
The assembly may be mounted by a bracket
comprising a pair oi clamping arms iii embracing
the motor unit, It. The arms III are engaged with
a rubber carrying member it! adapted to be at-'
tached to the vehicle frame. The assembly may so plying the carburetor and to the bypass whereby
_
driven continuoinly regardless
be placed in {my position of vertical or rotatable . thcpump'maybt
of the fuel demand of the engine.
.
adjustment within the arms Ill which are adapted
2. The invention defined by claim 1 together
to be clamped by conventional screw and nut
means ill. Obviously any convenient substitute 45 with a pump gear casing within said case, said
may be used instead or the connection is illus-~ casing having a through opening‘ constituting the
pasage from the pump outlet to the motor case
trated to accommodate for the position of the
' _
andilsohavingabearingsuri'aceioroneoi
assembly.
The electrical connection preferably
includes a ground lead. This may conveniently
'
be eii'ected by such a member as I21 between the
metal parts ‘or the brackets which are otherwise
the bearings oi the armature oi the motor, the
bottom wall of the motor case shaped to term
a bearing suriace tor a secondv armature bearing.‘ '
3. 'l‘he’invention de?ned by claim 1, said as
insulated by the rubber element.
. when the ignition switch is closed, the motor '
.sembly also including a sediment trap adjacent
ot'the conduit and through which
rotates and drives the pump gears. Fuel there
I loaded '
upon ?ows to the pump from the reservoir. It 55 the iuel passes to the pump. and a spring
valve
within
said
trap
and
a?ording
communi
iiows either under the in?uence of a slight pres
cation between the pump outlet and the trap and
sure'head or; it"assembled so as'to'require'a
'thusbecominga
part oi said bypass.
- ~pump developed suction, the suction will be but~
~ little owing to the fact that the pump is adjust
4. Incombination withtheiueltankoiamotor
vehicle and a conduit extending thereirom to
supply a carburetor, a‘ fuel supply assembly for
pumping iuel irom said tanktothecarburetorp
ably m'ountedron the frame adjacent the tank.
The absence 0! appreciable suction avoids evap
oration ot iuel. From the pump tothe carburetor‘
the fuel is subiect to pump pressure, whereby dan
said assembly constituting a part oi said con
du'it and including-.a ,c'over containing ilrst and
ger of evaporation is avoided. The capacity oi’ '_
the pump is- suiilcient to supply themaximum
needs oi the carburetor. Since the pump‘is in
continuous operation and ‘since it always supplies
at least _a little fuel more than the ensine demands, there is at all times some ilow of fuel
*
second passages. the ?rst for connection with the
tank. the-second for connection with the car
buretor. a pump casing secured to and beneath
said cover, pumping means in said casing, said
casing
passages whereby the, inlet and
through the bypass including, the valve III. This 70 outlet of thepump communicates with the ?rst
andsecondpassages respectively. a motor case
. valve is therefore normally slightly open and due
beneath said pump casing, a motor therein operi
tuates gently under the in?uence of the varyinl
how of fuel through the bypass and the pressure
spring Ill. It never intermittently pounds against
ably connected to said pumping means and a
' sediment trap constituting a part at said ?rst
its seat. Since the lower bearing 0! tbcmotor 75 mentioned passage.
5. In combination with the iueltankoi amotor
2,880,656
vehicle and a conduit extending therefrom to
supply a carburetor, a fuel supply assembly for
pumping fuelfrom said tank to the carburetor,'
said assembly‘ constituting a part of said conduit
and including‘a cover containing ?rst and sec
ond passages, the ?rst for connection with the
tank, the second for connection with the car
buretor, a pump casing secured to and beneath
said cover, pumping means in said casing, said 10
casing having passages whereby the inlet and
3
pump, a spring loaded valve in said sediment
trap forming a part of said bypass.
7. In combination with the fuel tank of a motor
vehicle and \a two part conduit extending there
from to supply a carburetor, a fuel pump assem
bly mounted between said parts of the conduit,
said assembly including a motor case, a motor
and a pump above the motor and within said
case, means forming a bypass between the high
and low pressure sides of‘said pump, said pump
having an outlet, means forming passages to
outlet of the pump communicates with the ?rst
deliver fuel from said outlet to the motor case
and second passages respectively, a motor case
where it serves to lubricate bearings, to the
beneath said pump casing, a motor therein oper
second part of the conduit for supply the car
ably connected to said pumping means and a
buretor and to the bypass whereby the pump ‘
15
sediment trap constituting a part of said ?rst
may be driven continuously regardless of the fuel
mentioned passage, said pump casing having a
demand of the engine.
passage therethrough whereby fuel may be sup
8. In combination with the fuel tank of a motor
plied to the motor bearings.
'
conduit extending therefrom to
I vehicle and a
6. In combination with the fuel tank of a motor
supply'a carburetor, a fuel supply assembly for
vehicle and a conduit extending therefrom to 20 pumping fuel from said tank to the carburetor,
supply a carburetor, a fuel supply assembly forv
said assembly constituting a part of said con
pumping fuel from said tank to the carburetor,
duit and including a cover containing ?rst and
said assembly constituting a part of said conduit
second passages, the first for connection with the
and including a cover containing ?rst and sec
tank, the second for connection with the car
ond passages, the ?rst for connection with the‘
buretor, a pump casing beneath said cover pump
tank, the second for connection with the car
ing means and a dr'ving motor therefor within
buretor, a pump casing secured to and beneath
said casing, said casing having passages whereby
said cover, pumping means in said casing, said
pump communicate
"the inlet and outlet of the
casing having passages whereby the inlet/and“ with the ?rst and second passages respectively,
outlet of the pump communicates with~the ?rst
a sediment trap constituting a part of said ?rst
and second passages respectively; a motor case
mentioned passage, said pump casing also hav
beneath said pump casing, a motor therein oper
ing a passage whereby fuel may be supplied to the
ably connected to said pumping means and a sedi
motor bearings.
ment trap constituting a part of said ?rstmen
CARLETON J. LAUER.
tioned passage, together with passages forming 35
ROY L. BOWERS.
'
a bypass between the 0 tlet and inlet of the
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