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Патент USA US2406103

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Aug” 20» 394@
c, Q RANDALL
-
__ Ú
ZAMÄÉE
CRÀNKQASE SCAVENGER
Filed Sept'. 19,A 1945
3_ Sheets-Sheet 41
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sNvEN-roR
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MALL
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_
ATTORNEY
_Aug...20, 1946.
2,406,103
c. c. RANDALL,
GRANKCASE SCAVENG‘ER
Filed sept. 19, 1945
s shams-sheetA 2
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iNvENToR
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fc. n RANDALL
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CRANKCASE
l-
SGAVENGER
> Filed Sept. 19, 1945
» 2,406,103
ì
I
3 Sheets-Sheet 5
`Patented Aug. 20, 1946'
27,405,103
j N UNITED STATES «PATsNTfoFFlCEÍ
_' 2,496,103
CRANKCASE SCAVÉNGEE »
Clark C. RandalL'ulOak’uPark,
.
,
Application September 19, 1945.,`- Serial No. 617,201
a’olaims. (c1. 12s-,17155
l
.This invention is directed to new and useful im- ~
'
provementsin'crank‘case scavenger.
'
lis 4utilized to produce- the air pressure necessary to accomplish the desired results.-
>
It is ay Well’known, fact thata serious problem
is ever present -due to the ,incomplete and .unsuccessful elimination from internal combustion
automotive engines of vapors, gases, and mois
ture. produced during the operation of such
e
_
And still another object of this invention is »to
provide an improved crank case scavenger that
¿will .be safe in operation, will not interfere in any
way with the normal operation of the engine and
may be quickly fitted to and become part of any
conventional automobile or truck engine.
A Yfurther object is to provide a unitary struc
Water,._ gum, resinous and acid-laden vapors`
resulting from combustion enter the crank case 10 ture comprising air scoop and Yaspirating means
of simple design that may readily be attached to
Space. as a result of leakage between the pistons
engines.
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and cylinder Walls the volume` of leakage being
a conventional automotive engine to operateso
large or small depending upon the condition of '
as to 'thoroughly scavenge the engine._
the engine. The result is a serious deteriorating
effect on lubricating'oils and the production of
„
The word “scavenger” has been used
herein
harmful deposits and sludge that follows, all of
This distinction is that a ‘,‘ventilator”` does not »
which interferes with the efñcient' operation of _
cause
fumes While
pressure
a “scavenger”
that will adequately
creates adequate
remove¿pres-.
the
sure ‘to in fact removethe undesirable .gasesas
the engine and shortens the life of; theparts
thereof.
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f.
.
a
.
.It is »recognized that attempts have heretofore
been made t0 solve this problem by providing
various means to ventilate the engine and crankV
Well as ventilate the engine.
case .to remove these harmful gases and vapors
but none of these means has proved efficacious for
internal combustion engine'for automobiles vor_
trucks utilizing one form of the invention herein
described.
various reasons. '
'
~
The usual internal >combustion automotiv
engine is provided with Ventilating or breathing
means whereby fresh air is admitted into the
crank case and permitted to be exhausted there
Y
advisedly as distinguished from' v“ventilator.”»„-
In the drawings:
~
l . . .ç
y ~
1
Fig. 1 ‘is a side elevation View of a conventional -
Fig. 2 is a side elevation view of portion of an- Y
other conventional form ofsuch an engine on
which lis installed a scavenger embodying this in
vention.
‘
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Y
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from. Often this is induced by motion of the 30 Fig. 3 is a side elevation View of a portion-of
still another conventional form of engine utilizing vehicle that tends to withdraw the air from the
crank case. Y This airflow has also -been caused
this invention by means of a unit-attachment.-` „ 4.
by- positive pressure means such as the exhaust,
Fig. 4 is a' plan View of the air pressure scoop
manifold vacuum or engine fan but inv all such
cases the pressure has been inadequate to
thoroughly svcavenge the fumes and gases and the
means for >accomplishing the results have been
either too cumbersome or have involved- change
in engine design or both and some of the meansÍ
attachment used as a part-> of one form _ofthe .
used have been harmful to engine operation.A
It is the primary object of this inventionl to
> crank case scavenger herein described.
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Fig. 5 is a plan View of-a conventional liywheel t
cover cut awayto receive air scoop shown in*
Fig. 6 is a sectional view taken along line. lì-lil -,
of Fig. 1.
,
provide a means for effectively removing` or,
Fig. 'l is a plan View of the scavenger unit com
prising the flywheel air scoop and venturi Vas
scavenging such undesirable gases from the crank
shown in Fig. 3.
.
m
>
.
Fig. 8 is a side elevation view of another form
casev of an internal combustion engine that is
simple in construction and that may be installed 45 ¿of a scavenger embodying’ the invention herein'
on--the conventional types of automotive engines
described.
Y
In detail the engine blockfis indicated by the
sign.
,
reference character l, the crank case -2, and the
flywheel casing 3. A typical air inlet to the crank 1
Another object of this invention is to provide a
crank case scavenger whereby an adequate air` 50 v_fcase is shown at 4 and the breather outlet at 5.
without major interference with the engine de- ,t
pressure is created and so directed to thoroughly
scavenge the crank case at all times during engine
operations.
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Y
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"
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Still a furtherwobject is to provide such a de
An aspirator or Venturi attachment Vli is con-v
nected with breather outlet 5 by any well known
means, such as hose and clamp connection 5a.
This attachments is a unit comprising an outlet
vicje whereby the conventional automotive engine 55 ¿extension 'I and a larger air pressure conduit v8 »
2,406,
103
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3
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surrounding outlet extension 1 and extending
.
y on the lower ñange of the engine block. The
breather outlet here is indicated by I9 with the
from a point above the lower end of conduit 1 to
a point past the lower end of the outlet extension.
` usual aspirator or Venturi attachment 6 con
nected thereto, by connector 20.
'I‘he upper end of conduit 8 is secured to conduit
In the modification shown in Fig. 3 the .breather
'I and closed by any well known method, as shown 5
at 8a. `Conduit 8 is provided with an air pres
sure receiving connection 9 extending at right
angles to the conduit 8 and joining the conduit 8
at a point,.above„the ..downwardly..„extendingYendw,
of outlet extension" 1. Thei‘lower-end-.of -conduit‘lo
outlet 2| is positioned in the side of the engine
block I, near the ñywheel casing 3. This permits
_8 is sheared as shown to provide an angular out
generally by reference character 22 and the ven
turit by 23. The air scoop comprises the same
let orifice l0.
t
the use of a unitary structure shown in Fig. 7 in
whichthe air scoop and .yentur-i-farefformed as a
unit. ¿Referring to' Fig. ’lithg air scoop is indicated
attachment plate 2'4 having outlet air opening
Venturi unit to »function as hereinafter e'X‘lolainedsf.:,` 25;:andfconduit 26 leading therefrom. This con-_
, `The conventional ñywheel casing 3 is~.-p1l‘«,Qjlided,15L ¿iuitßß .becomes the air pressure receiving con
, Thus the aspirator attachment 5 provides a
" >duit of venturi' 23 connecting with outlet conduit
v _ with the usua1 removable @over n that is cut
away (Fig. 5) as at l2 to 'provideeantfairioutl"fe-.îl 21:.;Whichtasnrroundszfthe outlet ,extension 28 in
to the air pressure scoop attachment shown inM _f the _mannerA hereinbefore described. The inlet
The flywheel ofgusual construction is" end 29“of^'conduit 28, in this modification is then
Y Fig. '4.
, shown at vI3 having teeth «I4 for connection with 2_0 connected by means of hose and clamps, or any
conventional starten VFI'he-l.iiywheel:casingfisfpro- e.. otheriwell yknown `rrneans tocthe'áoutleirbreathenî i.' ' '
vided with the Vusuahebre'atlien :openingsakánotr-.f 1 This provides a: îuni-tary: ‘structureathattioanobe:aV '
shown-à »or -an~air» opening .mayebe‘ lmadetif-neededt.
The‘air scoop.'attachment...Fig`
ï easilyfatta'chedftorfaccomplisir the*‘tlfi'oroughescav=->
is formedtwith'itf
. ,
enging action-when‘th'e engine isîfin ‘operation-2`
a . connecting plate! íL5 tourved-tozfitf theîfcontourf`25 .. In’themodi/ñcationtshown.in‘liugsßlthefaspiratin .if
of
lSwîthatßwillialignëwithïholes
the iiywheel-:eoverel I".V E'-It is‘providedfwithlholes?
|1512 fof '-.theïoover igt-1.1' ,
meansis the`~ sameiastshown in
but-instead@
of theî-t air.: pressure# receivingî. l'connect-,ioni2.91> biein'g‘eár
' joined to an air scoop receiving its pressuretf-roncuf.:>
whereby
covera--H itin‘f'anyr
can A«loef
welle-known#
secured toethe`~
manner.'
lïñywheel
«Thi's'fiair
.casing-1
the niiywheel.: it ‘ is -'directly/v1.fc‘onnectedbA witlnithe
scoopi'ffatta'chmentspiate v»l5 v«"i’s lformedf'zwithîf an »30 _outlet.=3 0 "off a smallblowen f3.| .iîtha‘tqisi'mounteduto-‘sf
, ellipticalainoutletil‘ô'»leadingttofconduit :H5 £74Thus « ~
the sidefof-the enginefblo'ck by. any desiredfbracket»
_it i'sf-seenethatv-whenf-theëairiscoopús A"attached to ~~î means.`l 'BlowerM 3 IP is 'foperatedi by fan :associate
the _flywheel coversthe air _foutletf-I-ßf'willfbe'fadjaàf.v
eleetric.=-motor.l 3'2 'operating'.>fromtgthe1¿electrica
cent-»theìteeth Mlòf ñy-wheel» Hi:`»1i'Conduit.Lv |'1 v'ex
circuitfoffthe’automobile or truck eng-.inettol _
tendsfforwardly from the-iñywheelandfthegoutlete35
end-‘andthe connection ‘9i are »joinedetogether by'. .f
a sectionlf‘of >Fair..vir'ïiressure» conduit =..\|.8 " by' »'»îanyt well-f'I i
_
.wheel/1to1;l
Itis-ofcourse
the'.` blowing.:.frrieansibut'.`
moreï desirableißtofutilizeithe
“some ¿in
stancesY thefseparate-,f:independent blowin "mear-is»
Í Witiiï'îthe ‘constructionf-hereinabovedescribed fiti'lf’
shown in :Figi-18 mayfsbe' morewadaptableìfí'ï How i:
ever, in both cases the full .blowing capacit-yëisïl».
canbe seen that whenever-the’‘fen-'gine:issinloperafee
utilized: :sofas :to: produce:.aadequatezipressureà to'.
tion the flywheel will rotate in litho-:direction of
withdrawßthe'~fumes»;.;.» ,
lçnowr-rclainping'ijneansr2
`
’
1
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'
.
YIn?someainstancesnthe eflywheïel casings; dono
move rapidly'lpast outletsïflZ fandffl 6 l’and wifliiact-f 1: havef..~removab1e2covers. t:.Inffsuch.;installations fi . .,
as
outwardly
-a `'blo'werato
through
forcee»V
conduit
substantial'
I1.
îamount'- ofeîa-ir. '45 is apparent.thatatheîair z‘outletstZ ~ andi: holes-:ajl-:Sbno'
.shown as out from the cover in Figiâswilltbeieuto‘f
intothe'bottom.ofzthecasingn
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,
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pressurefwilllbe eXertedfinl-theldirectiomof ther." ,
arrows-through'conduits: fi 'I and'.v I 8;ïfconnectionf9y ‘i’T
1. .A crankfcasetscavenger forfan internal come-ef.
bustionèengine e-providedè withia' -breatheresysteml _
atmosphere-through :orifice l1|-.|Jf. îiThi’sïrapid move-fv 50 ‘ffor.-1thé~.~"crank«:case-fandehaving a---ñywheel w-it _ ‘~
mentre-of;air"past¿outletiextensionß’la will'create ay 1' .
suction@or~---=vaeuum~»thereintitoI i-rapidlyfwithdrawf fr
gasesfiromé-fthe-î‘crankfcase tofweffectztheeneeded
teetht one itsïperiphery,=_comprising-Lan ~.airJ sooopeï
attachment A"adapted-#to bewpositioned «adjacent-»G1
the‘l'teeth-.iof - the# iiywheel-efor receiving: the‘fljaire
seafvengingiactionly As thislactionf progresses .fresh
moved: by Jsaid#teethg'f-¿a `:Venturi-»attachment`û
' air will be drawn-into.fthei'crank'icaseï .through-‘154;v adapted t:to: be connected with theeoutlet@portion- «y
breathe?t-.inlet . A.'I‘heffmovementl ofothe”.automa--v
of `the Í’breatheri-_systems-anda ¿conduit-f'c'onnectingï`z‘bile in- a. f direc ion from` Vîlefti'to. ‘ rig-,htfwill-f¿causeflip
air to pass the angular outlet orifice. I0 to creat
.~.
anfaddeìiïîsuction to' assistïàin.y .theîwithdrawals'oi
' the crank case fumes.
said’sair scoop-attachment:-with*‘saidßventuriratdâf
the
tachment
the* breatherfßsystemfto
iiywheel;
whereby"A
willî “be-fi
the*directed~«
'» airwithdraw
lmoved
past
f-umesiromthere».V
»by
Lthe'ffou
'the teeth-of»
tlet of
It is to be noted that .thisigo'
action‘walone :tis: far-sffvfroms su-ii‘ieieni-.1Y -to-i eiiect .the
needed/'result _if
‘ It has been found and demonstratedäithat¿there
crankease.w »«
_
Y
2. `»Aicranleease@scavenger for an internal com-2.»
bustionfJ-engine A‘ providedï-withf‘a fbreatheri system»L
pressureucreate'd ibytt'he‘ flywheeleblower; actionefis
of Suoh'stren’gthßthatr 'substantially complettafand 'mi' -teeth n-iits “periphery-and» a: cover zthîereforgtzcome-e..
thorough crank case scavenging is obtained
. '
prisinga an Lair »scoop-».attaíchmentwa Venturiî at-f. "
l Irii’f‘the‘v modiii'cationaillustrateci'einl-=Figo@> :the
tachmentàß'a conduit iconnectingifthe `ilr-iletioñfth
mainî features;eareisidentical .withf those; herein-,~
venturi with the breather outlet, an air outlet i
abovefdescribediand zf'orfthismeason. thei-reference'îf' i said flywhe'el'îîeoveri adjacentitheîcîteeth of the'
characters. remainethe samelffor these? .com-mon 1:70 "wheel, saidf.airiscooncompnising- a »plateriorme
feat-.uresí'àV The'amly: difîerìencealcetween -the‘ struc-~
foi'íatta'ehm‘ent zto'said fcover' lover»:said.lairfoutlet
ture`s'=,il.lust1=ïatedt.imlï‘igsaff
an air»¿outletï'adapted-.to be falign'edr with@theîßeoveirS
andiY 2*» is:l ' the‘ positi'onvf f
"
air outlet whenthe plate is attached, a condui
the=r`outlet-ïiis
engine"- block shown-looming'
ïioutf'irr-fFig-.rzeit?'is
fromz’thefi'sidef
v.showin as lo'catedzq;
‘of @the
loadings.'- from> thewair `ccmtle'tue‘ot'.saidiìpiataV anda _
imeansaoonnectingîß s'aidficonduitrwithfsaidVenturiä i ‘I
2,406,103
5
attachment whereby air moved by the teeth of
the ñywheel is directed through the venturi to
eiïect a rapid Withdrawal of air from the crank
case.
3. A crank case scavenger for an internal com-`
bustion engine provided with a crank case and
having a ñyWheel with teeth on its periphery,
comprising an air scoop attachment adapted to
be positioned adjacent the teeth of the flywheel
6
for receiving the air moved by said teeth, a Ven
turi attachment adapted to be connected with the
interior of the crank case and a conduit connect
ing said air scoop attachment with said Venturi
attachment whereby the air moved by the teeth
of the ñywheel will be directed through the ven
turí to Withdraw fumes from the crank case.
CLARK C. RANDALL.
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