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Патент USA US2406486

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Filed sepa 11, >1945
WAL Tfn n. @oA/HAM
. BY
Patented Aug. 27, 1946
` 2,406,486
?walter n. Bonham, Palo Ane, Calif.
Application A'snite‘lmber 11, 1945, serial Nt. 615,599 ,
'7 Claims. (Cl. 12B-178)
A only When’the engine .cooling water in which ,A
the thermostat is immersed is exceeding the
>This invention relates to the operation of cool
ing fans as used for circulating air over an in..
ternal combustion engine 0r through the 'engine
maximum desired temperature vand substantially
close the passage B, and to close the passage IA
radiator, and the principal Object ofthe invention
and open the passage B fully again at such times
as the Water is too cool for 'engine efficiency,
'thereby Vdrawing olf the `water from the “fluid
coupling” and stopping the fan,rand 'so on as Vthe
most efticient thermalërequir‘ements of the engine
may be, and without shock or jar to any moving
is to provide improved thermostatic controlled 'I
means for confining the operation of the fan to
such times only as when it is required-that is
vwhen the water in the engine is getting too h_ot, ’
and thereby avoid the loss of heat caused by the
conventional way of running the fan all ythe time
whether required or not.
" "
proved construction will appear in the kfollowing
description and accompanying drawing. ` '
In the drawing: _
ing of Fig. 1.
In further detail the fan is indicated at I
mounted onftl'ie outer end of a short shaft 2 the
inner‘end of which carries a set of fiuid coupling
cups or vanes 3 constituting the “follower” of the
Fig. 1 is a side view in vertical cross section of
my improved engine fan controlled drive.
‘ Fig. 2 is a front elevation taken along the’part'i.
ing line 2_2 of the pump anclñuid clutchhous
neither the engine nor its radi- V
ator >is shown, but only the necessary‘elements
constituting the improvement in the fan control.
’ ' >In the drawing
` Particular features and advantages of my’im
¿coupling and running in a circular casing er house
20 ing 4,! in which the opposed set of cups 5 also «op
erate' and are carried on‘a shaft 6 aligned vwith
shaft 2 and preferably provided with 'an aligning
extention 'I extending into'shaft 2, or vice versa.
Before describing my improvements, it maybe
stated that broadly it is oldV to control the opera
tion of an engine cooling fan byjmeans of a
thermostat, but so far such apparatus has'not
îShafts 2 and 6 are suitably supported onrv the
come into general use on motor cars, and' it'l is 25 housing 4 for rotation, and secured tothe outer n
end of shaft 6 is a belt pulley 8, while within the
one ofthe objects of my improvements `to provide
housing a gear 9 is secured to shaft 6. Gear 9
a simple reliable arrangement of partsfor this
is in mesh with an idler gear I0 revolvably mount
purpose and which overcomesome of the objec
ed on a pin I I secured to a removable cover plate
tions to previously proposedapparatus..
Generally described my apparatus comprises a 30 I2 lof the housing,v and' which idler is'in mesh with
a gear I3 secu-red to the pump shaft'M-which'
so-called fluid-coupling with one set of` blades or
carries the water circulating pump runner' I5.
cups (the “follower”) on the fan shaft and the
The pump shaft I4 is shown extended as at I4’V
opposed or “driver” set’on an Aaxially aligned
to'indicate thatj either this shaft, or the pulley-'.8'.
pulley or drive shaft, s-o that the fan is driven
through and by the fluid-coupling,4 providing 35 may be 4suitably driven from the engine to drive
the coupling >and pump in the-directions indi
there is liquid in it. The pulley shaft is driven all
catedl by the arrows on Fig. 2. The housing 4` is
the time from the engine by any suitable?belt or
preferably p_arted along the line I6 toffacilitate
gear drive as is also the water circulating pump.
assembling the parts as well understood. '
l ï
The water preferably flows from the engine to
the pump and from the pump to the radiator for
shown), and to and from the circulatingpump
cooling and recirculating through the engine in
and to and from the fluidcoupling, are here
`the well-known way. However, the Water in leav
shown as formed in the housing member ¿Land are
ing the pump has two paths to the radiator and
as follows:
which paths (passages) are controlled by 'a ther
mostat immersed in the water being circulated. 45
One of these paths (A) leads directly to the radi
ator, while the other path (B) also leads to the
radiator but goes byway of the lower part of the
fluid coupling casing so as to raise avwater level
or supplyl of vwater in it to thereby vcausegthe ever
Y revolving cups of its‘driver to _act upon this water
and start the opposed or follower set of cups in
motion and thereby start the fan carried by the
Inlet passage 2U preferably receives vthe >hot
water from the engine (not shown), and >conveys
it to the pump I5 which forces the water through
a passage 23 and various valve controlled pas- Í
sages and finally out of outlet ypassage 2I to.- the
top of the radiator (not shown) for circulationv
through the radiator for cooling, thence through
the engine water jacket and back againto'i'nlet
passage 20;
4Within passage ZI which is preferably a central
The action of the thermostat is to open passage 55 bore'in the housing 4 is tightly inserted a cylin
shaft of the follower set.
drical member 22 constituting a valve cage pro
vided .with a side opening 23’ receiving Water
Afrom passage 23 from the discharge side of the
maximum and minimum temperatures of water
p11-mp l5, an end opening 24 closable by a valve
25, an opening ¿6in an intermediate partition 21
substantially closable by ‘a valve'2¿8, and one or
more openings 29 at the opposite or right-hand
end of the valve cage formed in Van end diskÍor
ing systems either before or after the radiator,
with proper setting of the valves to operate at the
While I use the word"‘water” in the descrip
' tion and claims, it is to >be understood that this
term is intended to cover the'use of any circula
tion liquid used for cooling the engine and oper
ating the fluid coupling.
Within the valve cage k22 'is a longitudinally 10
movable valve rod 3l »extending through openings
2# v_and 26V and preferably guidedv as- by'a bearing
Having thus described my improvements Yin an
apparatusof' this kind- and >the manner of its
operation, what I claim is:
hanger Y32 Aand Ywhich rod carried valve 25 and-v y (il.v Engine fan control comprising a circulating
also Valve 28 so spaced'rand arranged that upon, y. ' ¿pump'arranged for circulating the cooling waterf
Yof an engine, meansV for continuously driving said`
sliding of the rod to fully open valve 25, valve
28 is closed, and Vice versa, tho a small open pas- ' ` pump from the engine, a fluid-coupling arranged
_sage 33 thro-ugh valve 28 provides fon at least a Y for drivingsaid fan and with its follower con
' . small ñow of water past it at all times.
nected’to thefan, and its driver connected for i
-To actuate the valve rod a linearly expansibleî ’ continuous driving withsaid pump, and thermo- "
thermostat 34, here indicated las an expansive 20 static means controlled by the temperature of the
’ fluid bellows type, is secured at its inner end to
circulated water arranged~upon predetermined
' and fulcrumed against the spider 30.
heating toA directo some of said. water into said
duid-coupling. whereby said fan. is operated, and
' -Normally, as when starting the engine after
upon predetermined cooling of the thermostat to
becoming cool, thermostat 34 is also cool and. con
tracted to >close-valve -25 andfope'n valve 28st) that 25 withdraw said ,water from said, fluid-coupling, in
repetition.V assuch> heating and cooling Vof the
thewater from the pump l5 hows from thepurnp
thermostat takes place.
Vdischarge passage `23' through valve port 2G, over
2l. Engineïfan control. comprising a circulating
and> around Vthe thermostat' andthrough Spider
openingsv 2'9 and out >of- outlet 2flfto~the radiator,
when the »fan is not-then operating.
- «,
pumparrangedv for circulating the cooling water
of 'an engine',v means >for continuously driving said
v As the circulating water warms up and reaches
' thepredetermined maximum desired-_say about
pump from the engine', a fluid-coupling arranged
for driving~ said> fan, and' with its follower con
A18,09 F.:-.the similar heating ofthe thermostat ex
pands it and beginsY tor openÁ valve 254 and Yto
nected. tothe ian, and its,- driver connectedíor
close valv`e`28t. these valves being preferably're
spectivelyf- fully opened- and closedV at. about , 190°
E, ‘and which directsV most of thewater fromA the
circulating pump 15„(except the smallA amount
passing throughV hole 3\3~ in valve: 2,8i`V through
continuous.- driving with, said pump, and thermo
static meanscontrolled by the temperature, of the
circulated water arranged upon predetermined
heating to, direct some of said water into said
fluid-coupling whereby said fran, isroperated, and
` upon predetermined. cooling. ofthe thermostat to
passage 35- pasti the under open edgeof the iluid o withdraw said water from said Huid-coupling,l in
repetition as,r such heating and cooling off` the
' coupling chamber 36 and finally; back` into outlet
2llby way o_f >anozzle 3.1:
thermostat takes placasaid thermostat mounted
within the _ñow oi said water for directin'fluence
LAsftheî Waterk pressure from the-pumprisesï in
passage. Seitv ìsrforcediup into the fluid coupling
of'it’s temperatura
v which causes the follower set‘of- cups 3 attached» f
to the fan shaft, tostart rotating and put 'the
Any ai-r'infthe- coupling‘housing escapes by way.
of a suitable air relief valveV opening 38' at thetop
ofthe housing. andwhißh closes; when thewater
risesisutñciently to'ñoat the ball 39».
Y ~
and- receiving water therefrom, and the second
means controlled by said thermostat operating
said valveA meansfor delivering and withdrawing
water from said, >fluid-coupling under control of
theY temperature of ‘said circulating water.
7_4'. In a structure asset out in claim 2, said fluid
coupling mounted at a point higher' than said
pump and there being two outlet passages for the
water-:from -said pump, one of said passages also
valve 28 so that al1 of theV water again' circulates
' through the- valve housing to the discharge end
of passage 2l, and nozzle 31v beingV inthe form: of
passage bil-passing said fluid-coupling, andvalve
Upon, the water temperaturdfalling too much>
Vfor e?ncientopcration’of the engine,y thethermd
stat-contracts, closes valve 26 and' fully opens
thus stop the ian.
` also Opening» to thefluid-coupling ier delivering
an injector' extending centrally within the out
flowing water inpassage 2|V will quickly'- syphon
out thewater from the, fluida-coupling chamber-"to
3. Ina structure asset out'in claim 2, said
fluid-coupling Vmounted at a point higher than
said pump and there being two outlet passages
Vfor the water from said pump, one of said passages
The use of this apparatus not only greatly con
openingito the fluid-coupling for delivering andv
receiving water therefrom„ andthe second pas
sageby-passing said fluid-coupling, andivalve
means controlled by said thermostat operating y
serves the engine heat to the point of greatest
said- valve, meansk for delivering and withdrawing
eñiciency, as predetermined by the thermostat
settingA for ythe engine in accordance with. the 65 water from said fluid-,coupling under control, of
engine requirements, but alsoA eliminates theu load
the, temperature of said circulating water, the
of the fan from the engine at such times as itis
water withdrawn from said fluid-coupling being
cut outby the thermostat as described.
guided to a common discharge circulating pas
Sage. from the pump through. an iniectortype
Y While I prefer to, use a. water circulation from
the engine directly to the. circulating pilmlly and 70 nozzle to aidìn drawing saidñuid-coupling.
thermostat, and thencev to the radiatorfancl back
to the» engine, as being more correctly responsive
to the temperature of the engine, it is ofcourse
evident that my apparatus may ber installed. in
any arrangement of >circulating water engine cool-`v 75
5., Ina structure as set Vout in claimZ, an- au
tomatic airrelief valve on said fluid-coupling to
facilitate the. entry and withdrawal, of water
6„In'an engine fan control, aA íluidecouplíng
comprising a driver and a follower each mounted
on a separate shaft arranged in alignment, means
on a separate shaft arranged in alignment, means
forming a housing for'the coupling members and
forming a housing for the coupling members and
revolvably supporting the shafts with the follower
shaft projecting therefrom, a fan secured to the
follower shaft, a shaft driving element secured to
the driver shaft, a rotary pump arranged to cir
culate the water from an engine cooling system,
shaft projecting therefrom, a fan secured to the
follower shaft, a shaft driving element secured to
the driver shaft, a rotary pump arranged to cir
culate the water from an engine cooling system,
power transmitting means connecting said pump
revolva-bly supporting the shafts with the follower
power transmitting means connecting said pump A
and said driver shaft for simultaneous rotation,
passages arranged for guiding the water to
and s_aid driver shaft for simultaneous rotation, 10 water
said pump for circulating the same, a
water passages arranged for guiding the water to
passage adapted to guide some of the water from
and from said pump for circulating the same, a
passage adapted to guide some of the water from i ,5 said pump into said fluid-coupling for actuating
the same, a thermostat exposed to the tempera
said pump into said fluid-coupling for actuating
ture changes in said water, and Valve means op
the same, a thermostat exposed to the tempera
ture changes in said water, and valve means op_ il.; erated by said thermostat controlling the flow of
era’ßed by said thermostat controlling the ñowff'
of water into said fluid-coupling.
7. In an engine fan control, a fluid-coupling
comprising a driver and a follower each mounted 2
water into said fluid-coupling, and means insur
ing a constant flow of said water over said
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