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Feb. 3, 1942.
' ¿271,993
E, s. s'?oDDARD
VAI-IVE- COÍ‘ISTRUGTION FOR WASHING AÍPARATUS
2 Sheets-Sheet Il>
Filed Feb . 27, 1941
Vlg.
Inventor
Edgaï- 5. Stoddard,
b’gl/
` Hi
Attor heg."
Feb. 3, 1942.
E. sjs'roDDARD
2,271,993 -
VALVE CONSTRUCTION FOR WASHING APPARATUS
2 sheets-shea: 2
Fned Feb. 27, 1941
lxndu
`f
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Inveñbor‘:
Edgar 5. Stoddard,
‘ b5
‘ó
‘
Patented Feb. 3, 1942
_ UNITED STAT Es
PATENT oFFlcE. , "
2,211.99:
'
_
VALVE coNsrnumoN ron wasmNo
.
mms-rus
'
.
.
Eam- s. Stoddard. nenn. nl.. 'unmi- to Ear
son
Electrle Am 00mm!l
l Chicago, lll., a
Ine..
'
of New York.
sppuoouon roma-y' zr, 1941; serial No. :sus:
schim».
(ci. iss-139)
This invention relates to a valve construction
_
'
. vation'oi’ _a dishwashing apparatus embodying A'
to a drain valve construction'for a dishwashing
apparatus -and has for its object the provision
Fig. 2> is an enlarged front elevation showing in
'the drain valve construction of this invention; . "
liable in operation and relatively linexpensive to
manufacture.
’
'
while not nmiced thereto, this invencion-- re- lates to a new and improved electromagneticaliy~
operated valve especially adapted for use las a
’ drain valve of a dishwashing apparatus and it
is among the objects of this invention to pro
vide an improved valve of this character. -
detail the improved valve. construction of this- '
invention; Fig. 3 isa top view-of the valve oon- 4
y smicuon shown in Fig. 2; Fig. 4 1s a sectional
view taken on the line 4-4 of Fig. 3, and looking
in direction oir arrows showing- further details '
of the valve construction; Fig. 5 is a sectional
view taken on the line 'l5-5 oi Fig. 2, and looking
in direction of arrows showing additional details
of thevalve constructionyand Fig. 6 is an en
larged sectional .view taken >on the line 6-6 of
Fig. 1, and looking in direction oi arrows show
As is well known in the dishwashing art, the
waste ñuid- which the drain valve is called upon
to handle often contains a rather high 'concen
tration of greases and othersticky substances.
I ing the -outlet construction for the improved valve
venting arrangement of this invention.`
Referringto the drawings this> invention has
' It has been found' in the past that these sub
been shown as applied` to a dishwashing appa
stances often accumulated around the valveseat
of the drain valve, causing the valve either to
>ratus of the front opening type whichl comprises
'a vat Il suitably supported in a casing having
' side walls Il andk I2, a rear wall i3, and a top
fail to seat properly or to stick in its „closed
position. It is among' the objects of this inven
wall Il. Provided in the topwall is an inte
tion to provide an improved drain valve-construc
tion in which such operational failures are elim
inated. In this regard it is a specii‘lc object of
this invention to provide an improved drain valve
construction for a dishwasher in which, prior to
opening, the valve element is given a hammer
blow to completely disengage it from the valve
seat.
.
'
grally formed back splasher plate v I5 in which is ’
mounted suitably manually operable .control
means Il »for controlling the various electrically
operated element of the dishwashingapparatus.
. Arranged to close the i'ront opening of the vat
Il is a door Il in which is provided a Ventilating
louver ll‘and in the upper left-hand corner of
which is provided suitable detergent;l supplying
Y
It is among the further objects of this inven
tion to >provide new and improved means i'or
As shown in Fig. 1, the bottom wan 2.o of the
electromagnetically operating the improved valve
vat Il slopes downwardly so as to detlne a recep- '
construction referred lto above so that it will be
tacle 2l for receiving a washing fluid. vProvided "
quickly-and relatively silently -actuated upon the
within the receptacle!! is animpeller’ZZ which
energization of the electromagnetic means and
to provide improved means for connecting the '
electromagnetic means to thevalve means'so- -
-
‘
' for a washing apparatus and more particularly
of an improved valve construction which is re- '
-
'
panying drawings in which Fig. 1 is a front ele
is adapted to be driven by a suitable motor 23'.
positioned outside of and below the bottom wall '
2l,- as illustrated. Whenl driven by themotor 23
that the' proper adjustment may be attained to ~'40
the'impeller picks up the washing fluid in the
insure maximum pull on'the valve by the mag'
receptacle 2| and throws or hurls the ñuid up-
netic
means.
‘
'
o
`through the washing vat I0 into contact with
dishes contained therein. It-will be understood
vide improved means _for venting the valve’ con
struction vso that failure of the- valve to open 45 that suitable rack means (not shown) .will be
used for supporting the dishes Vwithin the vat lll. ,
due. to the building up of 'a back pressure _on the
The motor 23 is supported by means of suitable
discharge side. thereof is prevented.
'
brackets
v24 which are secured to a draincastlng -Further and more specific" 'objects of this in->
25 mounted _on the bottom wall 20 of the vat in
vention will become apparent as the following
description proceeds and the «features of novelty 50 the manner more fully described and claimed in
which characterize this invention will ¿be set ï v my copending application Serial No. 380,849 ?led
forth in the claims appended _to and forming al Feb. 27, 1941, and’assigned to the assignee of the
> It is a further object of this invention to pro
part of this speciiication.
For a more complete understanding of this v '
present
invention. f
-
.
'
washing nuidwmon 1s prefer-abn worm water
invention reference should be had to- the'accom-A 55' is-supplied to thelvat lll by means ofa suitable
2
2,271,993
spray device 29 which is supported in the central
portion of the top wall of the vat, as shown in
44 due to the pitch of the seat which is approx
imately 15°. However, the ilapper is free to
Fig. 1. This spray device is connected bymeans
of suitable pipe 21 which extends downwardly
swing open to permit the free discharge jof fluid
into the drain. elbow. However, in the event
along the outside of the vat between the vat and
the rear wall I3 of the casing to the outlet side
of a control valve 28, the inlet side of which is
that fluid should back up into. the drain elbow
from the wastevsystem due to the fact that the
. drain elbow lies below the discharge point of
other devices connected to the drain system, for
example, a sink outlet, the valve element 45 is
free to swing to the closed position and prevent
such waste fluids from backing up into the wash
connected by piping 29 to a. suitable source\oi!y
supply of washing uuid. The valve za contrbis
the quantity of washing nula supplied to the vat
and in the preferred form of- this invention it is
electromagnetically operated by means of a suit
able solenoid 30 which is energized in accordance
ing apparatus.
'
with the positioning of the control means I8. -
In order to move the drain valve from its nor
mally free swinging drain open position to a
It will be observed that the valve 28' is locatedv
positively held closed position there is provided
_ behind the motor 23 and its supported in posi
>within the drain elbow an arm 49 which nor
' tion by means of a bracket 3| ,as more particu
mally lies out of engagement with the ilapper
`element 45. As shown in dotted lines in Fig. 4,
however, the arm 49 is adapted to be moved into
larly described in my aforementioned copending
application.
'
Waste iiuid is drained from the receptacle 2i 20 engagement with an abutment 50 provided on
through the drain casting 25 andinia a drain
the flapper to hold the fiapper firmly against
elbow 32 from which it is .discharged into a
the valve seat 44„_to produce a closed position
suitable trap- connection 33 which is connected
for the valve. The ’arm 49 lis secured by means
to a drain system (not shown).
,
'
y,of the set screw `5| vto a shaft :52 whichfis Jour-Ü
As previously pointed out, this invention re
naled in the side walls of the> drain elbow. and
lates to the provision of new and` improved
means for controlling the flow of waste iluld
from the washing vat so .that washing ñuid may
be accumulated in the vat for a portion of a
has one end projecting‘through one sidewall
of the elbow. A suitable packing gland' 53 is
'provided to insure that no fluid will leak out
" Wardly along the shaft at the point where it ex
washing cycle and may thereafter be quickly so tends through the elbow. Secured to the pro
Vand reliably discharged from the washing vat
Jecting end of the shaft 52 by means of a -set
into the» drain system.
'I‘he improved drain valve construction for ef
screw 54_is a T-shaped lever 55. By moving
this lever clockwise asviewed in Figs.. l and 2,
the arm 49 will be rotated from the full line po
. sition to the dotted line position in which posi
tion it engages the abutment 59 to hold the valve
in' the closed position. In order to bias the arm
`49 to its normal position shown in full lines in
Fig. 4in which it does not obstruct the free
40 swinging movement of the iiapper 45 there is
provided a torsion spring 58 which is wound on
a sleeve 51 mounted on the projecting end of
' fecting this controlling function is shown- in
detail in Figs. 2 through 5. Referring to these
figures and particularly Figs. 4 and 5, it will be
observed that the improved drain valve con
struction includes a drain elbow 32 which is
mounted on a drain casting 25. Secured be
tween the discharge opening of the drain cast
. ing and the inlet opening of the drain elbow is
a valve seat casting 34 which includes 'a ñange
35 which is adapted to" fit over the flange 36
shaft 52. vThe spring 59 has one end secured
, provided at the discharge opening of the drain
in an opening provided in the head portion of
casting and a ilange 31 which is adapted to be 45 the Tsshaped lever 55 and has its opposite end
received within the flange 38 provided at the '
secured in a suitable eyelet provided in ‘the
'inlet opening of the drain elbow. -Positioned
bracket 58 formed on the drain elbow. The
between the ilanges 35-39 and 31-38 are the
sleeve 51 is mounted on the shaft so as to be
gaskets 38 and 4l respectively for\ providing a '
duid-tight seal.
Provided for securing the
drain elbow and valve seat to the drain cast
ing is a pair of bolts 4| which are threadedly
received in the drain casting and when drawn
down tight, ñrmly hold the elements in iluid-
tight relation.
`
`
The flanges 35 and 31 are lspaced apart by
y means of the tubular portion 42.
Projecting
outwardly from the flange 31 is a discharge por-
tion 43 which is adapted to extend into the drain
elbow, as shown in Fig. 4, to form a valve seat
' 44 for the valve element or ñapper 45. This
valve element is of the swing check valve type
and it is swingably orv pivotally supported by
means of the arm 48 which is supported on a
supported between two spaced washers 59 and is
held in position by means of a cotter pin 38.
In accordance with this invention the move
ment o_i‘ the drain valve from its normally open
to its closed position and from its closed po
. sition to its normally open position is electro
55 magnetically‘controlled. In other words, elec
tromagnetic means are provided for actuating
the arm 49 and the energization of the electro
^ magnetic- means is controlled in accordance
with the movement of the control switch I3.
60 The details of construction of the improved elec
60
, tromagnetic means are best illustrated in Figs.
2 and 3 and referring to these figures it will be
observed that there is cast on the drain elbow
a suitable supporting flange 8| to which a coil
pin 41 rotatably Joumaled in a pair of arms 48 ois supporting bracket 32 is adiustably secured by
integrally formed on the valve seat casting 34.
suitable means such as screws 63 adjustable in
It will thus be observed that the valve seat cast
fthe slots t4 provided in the bracket. This coil
ing and the valve element constitute a unitary
supporting bracket is substantially rectangular
assembly which can readily be mounted in po
in shape and is provided with a central opening
sition on the drain casting with the valve por 70 in which an electromagnet is resiliently supported
tion projecting into the drain elbow. The bolt
by means of a plurality of tension springs 35.
' openings in the pairs' of iianges 35-38 and
31-33 are positioned so that flapper 45 is held
in a vertical position.
When in this position
The electromagnet comprises a laminated core
_ 88 upon which is wound a coil 81 and within
which moves a laminated amature 33 compris
the flapper 4,5 will rest against the valve seat 75 ing a plurality of strips secured together in a
3 .
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2,271,993
stack. The twobiitside strips of this laminated
coreextend beyond the ends of the remaining
strips so as to forma U-shaped frame in which
>is secured a pin :99 upon which is provided a pair~
of spacers '10.'
In order to transmit the movement of the
, armature 68 to the outer lever 55 a tension spring
1i is provided between the pin 69 and an ear 12
provided on the head-_portion of the T-shaped
To accommodate-the arm 13, the drain-elbow is
provided ‘with jaI rectangular-shaped ‘well 14 at
the top thereof. Integrally formed on the arm _ Í
49 is an- upwardly projecting arm 15 which nor
mally lies within the hook-shaped abutment 13.'
However, upon'movement of the
49 in a
clockwise direction so as to move the valvev to its
Aclosed position, the arm 15 willv move clockwise
past the end of the arm 13 vto the dotted position " _:
. lever 55. Such. a construction is preferred over. 10 shown in Fig. 4.. Thus when the coil l1 is deen- l» ;‘
ergized and the arm 49 is moved counterclockwise
the use of a solid connection between the arma
ture and the lever since' the‘tension -spring in- _ 5 under the influence of the biasing' spring Il. `the
'end _of the -arm 15 will strike against the outside
edge of the arm 13 imparting 'a hammer blow to
ñapper 45_ which positively breaks it away
the tension spring transmittingarraiigement -the 15 the
from
the ’seat 44. After imparting such a ham
_- accuracy with which the'armature must be posi-_
mer blow the arm 15l continues to move ¿in a
tioned relative to the lever 55 in order to eñec
counterclockwise direction to its normal position
L‘tively close the ilapper45 is not as great. With ar
creases the travel of the amature over that ob
tained with a fixed connector. Moreover, with>
ñxed connector between thev two operative ele
within the hook portion- of‘arm 19, as shown _in
ments a poor adjustment results in unsatisfac 20 fulllines in Fig. 4. It will thus bel observed- that
there is provided in accordance withvthis‘inven
tory operation of the electromagnetic means.
'tion relatively simple, yet highly effective means
For example, ii the adjustment is such that .the
for preventing- the iiapper 45> from .becoming
armature cannot go all the way intothe coil to 1
stuck to the valve seat 44 at any time during its
provide a magnetic seal, the coil will vibrate. On
the other hand if the adjustment is such that
It has'also been found that the formation of
‘ the armature reaches the limit of its travel too
quickly the valve will not be held tightly closed.- _air pockets in the drain elbow, on the discharge
By employing a resilient connector between the ¿_ side of the valve, may aii'ect the operation of ‘the
valve, by interfering with the free swinging of the
operative elements,. these difiiculties in- adjusting
element 45.~ In order to eliminate jthe
the elements relative 'to each other are substan 30 ilapper
possibility of such an- air pocket forming in the
' tially overcome and in addition the noise encoun
operation.
l
'
.
drain elbow, a vent opening 19 isprovided -near '
' ` . the top of the well 14. Without such a vent it is
'_ >In Figs. 2 and 3 the electromagnetic operating ' possible for air to'be pocketed between the'inlet. means is shown in its normally deenergized posi 35 vside of the lvalve and the water standing-in the
tei-_ed in operating the electromagnetic means
_and the valve is substantially decreased.
tion. -When in this position the> valve operating
arm 49 is in the full line position shown in Fig. 4
and the flapper 451s in its normally free swing
trap 33 so that the valve will be held shut against
' a slight'head of water inthe tub.v
reason f
- that this occurs is that it-is difilcult for the air
inl the'upper portion of the drain elbow to travel
horizontally through the valve and up into vthe armature 68 is retracted and the lever 55 is 40- tub.
v:Bv relieving 4the pressure -through the vent
moved clockwise as viewed in Figs. l and 2. This l
opening
the free swinging of the ñapper‘ 45 is
causes the arm 49 to be moved' clockwise asing position. When the coil 51 is energized, the '
unimpeded.V
‘
'
_
_
-’
viewed in Fig.l 4 to the dotted line position vshown '
In order to Vpermit the valve to function prop
~ in this figure, in which position the ilapper 45 is
erly,
only a small-vent- opening is required rin the
firmly held against the valve seat- 4_4 to prevent .45
top of the -drain elbow.’ Even suclra vent, how
_ the discharge of fluid from the washing appara-v
ever, would be likely to permit water to spill on
ythe floor through the vent if the drain did not
operate rapidly. (For. this reason' a‘ tube 11 is
to provide a iluid-tightrelation'between the two .50 attached to the opening by means ofthe bushing
19 toV carry the vent above the- normal water
when the ‘ilapper is tightly held against the seat.l
level _inv the tub. `When thev washing apparatus
When ‘the coil 61, is deenergized, the armature
68 is pulled outwardly to the position shown in -' is connected' to the same-‘drain system as anfad
joining sink it is necessary to> carry the vent tube'
Figs.’2 and -3 under the influence of the tension
Aat least'as high as the entrance tothe sink drain f
of springs 1l and 56 and at the same time 'the
in order to avodidv water that might be accumu
arm 41 is rotated >counterclockwise to theviîulltus. 'It will be understood that the adjoining
surfaces of the flapper 45 and of the Valve vseat '
44 are interñtted as by grinding _or the like so as
` line position shown in Fig. 4, permitting the valve -
tov return to its normally free -swinging position. `1
It has been found that when the waste waters
' which are vdischarged through the drain valve are
sticky in character there is> a' tendency for the
flapper 45 to stickclosed. This of course has.
lated in the sink drain from backing up through
the'vent. `Moreover, provision must also be made
_ to prevent the pumping of -water'out of the vent
and onto- the floor due to pressures produced on
the drain side of the valve by _other apparatus
connected to the drain system. For these _reasons
the vent tube is projected -upwardly between the
back of the vat and the rear lwall I3 of the casing
paratusand interferes with the >remainder of the 65 and is brought into the vat below the top wall
washing positions of the control l5.- In order to ._ fthereof." Inïthis position the vent is suiliciently
certain detrimental effects onv'the washing ap- _
eliminate the possibility of the flapper lsticking .
under such conditions there is provided in ac
cordance with this invention meansfor impart
high for most normal installations of the dish
e washer and anywater that vis -pumped or forced
out through the vent is returned to the interior of ’
ing a hammer blow tothe valve at the time the 70 the vat.
arm 49 is permitted to return to its normal posi
As _shown in Fig. 6,` thev connection of the vent
tion. This means includes a hook-shaped-` abut
_ ment 13 which is integrally formed on the valve
_tube to the vat is- effected by means of a bush
ing 19 into which the upper end of the tube 11
arm 46 and extends above and outwardly to the
projects. - This bushing is firmly secured to the
right from the pivot- P111 41. aS shown in Fig. 4. 75 rear wall of the vat 19 by means of a nut 59 and
4
2,271,993
the point at which it passes through the wall of
the vat is sealed by means of gaskets 8l. In
against said4 seat, means for biasing said operat
ing arm out of engagement with said valve ele
order to limit the amount of water that might
be pumped into the vat through the vent open
ing in a short space of time, the discharge end of
the bushing is provided with -a small opening l2.
Qifcourse, the same eifect could be obtained by
îîfniakin'gli~èthe vent tube .11 of smaller diameter.
ment so as to permit said element to return to
its normal free swinging position when the hold
ing effect of said portion of said arm is removed
and a second portion on said arm- adapted to en
gage a portion of said valve element to impart a
sharp blow thereto when said arm is moved un
' However, .it has been found that this is not satis
der the' influence of said biasing means so that
factory since the vent tubel would tend to clog,
especially if food pulp from the waste unit were
forced into the tube.
It is believed that the operation of the im
said valve seat is prevented.
proved drain valve construction of this inven
tion is clear from the foregoing detailed descrip
tion. It is to be observed that there is pro
vided in accordance with this invention an im
proved valve construction particularly adapted
for use as the drain valve of a dishwashing ap
any tendency ofsaid valve element to stick to
3. A valve construction for a dishwashing ap
paratus having a drain casting comprising a
drain elbow, a valve seat casting having a por
tion adapted to project into said drain elbow,
means for mounting said valve seat casting be
tween said drain elbow and said drain casting, so
that said portion projects into said elbow, a valve
seat on said projecting portion of said valve seat
paratus. Moreover, it will be observed that there 20 casting, a valve element adapted toÍ cooperate
is provided a drain valve which is relatively sim
i with said valve seat, means for pivotally mountple in construction and may be easily mounted in
ing said valve element on said projecting portion
its operative position in a dishwashing appara
of said valve seat casting, said means permittingv tus. Furthermore, it will be observed that there
normal free swinging movement of said valve
is provided an improved drain valve construction
element out of engagement with said valve seat, a ,
which is thoroughly reliable in operation in that
projecting arm on said valve» -element, an actu
' means are provided for preventing the valve from
ating arm pivotally mounted within said drain el
either sticking or being held in its-closed posi
bow, means on said actuating arm adapted to en
tion after the electromagnetic operating means`
gage said valve element to move it from its
have been actuated to cause it to be moved to its 30 normal free swinging position to a closed posi
' normally open position.
'
tion in engagement with said valve seat, and ad
While there is shown a particular embodiment
ditional means on said actuating arm adapted to
of this invention it will beunderstood of course
engage said arm on said valve element to impart
that it is not desired to be limited thereto since
a sharp blow to said arm upon movement of said
, many modifications may be mad'e thereof and it. , actuating arm out of engagement with said valve
is therefore contemplated by the appended claims
element so as to prevent said valve element from
to cover any‘such modifications as fall within
becoming stuck in said closed position.
the true spirit and scope of this invention.
4. A valve construction comprising an elbow, a
-' What I claim as new and desire to secure by
valve seat projecting into said elbow, a valve ele
Letters Patent of the United States is:
’
ment pivotally mounted to cooperate with said
1. A valve construction comprising a body
valve seat, said valve element having a normally i
member, a separable valve seat projecting-into v free swinging position in which it is out of en
said body member, a valve member pivotally
gagement with said valve seat, an operating arm
mounted on said valve seat so as to _cooperate
with said seat and lie within said body member, 45
- said valve member being mounted so that nor
mally it swings freely about its pivot, a valve op
erating arm within said body member, means for
rotatably mounted in said elbow, a projecting
portion on said arm adapted to be moved into
engagement with said valve element to move it
from said. normal free swinging position to a
closed position in engagement with said valve
actuating said arm in one direction‘to bring it
seat, means. outside of said elbow for rotating said
into engagement’ with said valve element to move 50 arm so that said portion engages said valve ele
said element from its normally free swinging po- ’
sition to a closed position in engagement with
said valve seat, means for biasing said arm in the
opposite direction so as to move it out of engage
ment with said valve element and permit said 55
>valve element to return to its normal free swing
ment and holds said element against said seat,
means for biasing said operating arm‘out of en- ~
gagement with said valve element so as to per
mit said valve element to return to its normal
free swinging position when the holding efi'ect of
said portion of said arm isA removed,-a second--
'ing position, and means on said arm for impart
portion on said arm adapted to engage said
ing a sharp blow to said element in the initial
valve velement to impart a sharp blow thereto so
portion of the movement of said arm .in said op
as to free said element from said valve seat in
posite direction so that any tendency of said
the event that it is stuck thereto, and vent
80
valve element to stick closed is prevented.
>means in said elbow for venting the" discharge
2. A valve construction comprising an elbow, a
side of said valve element so that interference
valve seat projecting into said elbow, a valve ele
with the free swinging operation oi' said valve
ment pivotally mounted within said elbow so as
element in said drain elbow by air- trapped on
to cooperate with said valve seat, said valve ele
the discharge side of said element is prevented.
ment having a normally free swinging lposition 65
5. A valve construction comprising a body
in which it is out of engagement with said valve _ member, a valve seat projecting into said body
seat, an operating arm rotatably mounted in said
member, a valve element pivotally mounted to
elbow, a projecting portion on said arm adapted
cooperate with said valve seat, said valve element '
to be moved into engagement with said valve ele 70 having a normal free swinging position in which
ment to move it from said normally 'free swing
it is out of engagement with said valve seat, an
ing position to a closed position in engagement
operating lever rotatably mounted in said body
with said valve seat, means outside of said elbow
member having a portion adapted to be moved
for rotating said arm so that said portion en
into engagement with said valve element to move
gages said valve element and holds said element 75 it -from its normal free swinging position to a
5
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closed position in which said element is brought
L into engagement with said valve seat, means for
.’ biasing said operating lever so that said portion
is out of engagement with said valve element and
permits said normal free swinging movement of
said element, a second portion on said operating
lever adapted to engage a portion of said valve
element to impart a sharp blow thereto upon
movement >of said operating lever under the in
casting- having a portion projecting into vsaid
drain elbow, means vfor securing said drain elbow
and said casting to said vat so that said portion
lies within said elbow, a valve seat'on said- por- `
tion lying .within said elbow, a valve element
adapted to cooperate with said valve seat, means
for pivotally mounting said valve element on said
portion of said> valve seat casting lying within
said elbow- so that said element lfreely swings
into and out of engagement with said valve seat
fluence of said biasing means, a vent opening-in 10
in accordance with the fluid pressure exerted on _
said body member for venting the discharge side
said element,van operating arm rotatably mount
of said valve element t0 prevent trapped air on
ed within said drain elbow having av portion
the discharge side of said element'from inter
adapted
to be moved into engagement with said
fering with the normal lfree swinging operation
valve element to positively move said element to
of said valve element, and an open-ended tube
a closed position against said valve seat and hold
connected to said vent opening for raising the
said element in said closed position, means for
effective level of said vent opening.
l '
biasing said operating arm out o! engagement
6. A valve construction comprising a body
with said valve element so as not to interfere with
member, a removable valve seat projecting into
said free swinging movement of - said element,
said body member, a valve element adapted to 20 electromagnetic
means supported outside of said
engage said valve seat to produce a closed posi
drain elbow for operating said arm and holding
tion for'said valve construction, means for piv
it in engagement with said valve element against
otally mounting said valve element within said
the force of _said biasing means, a vent in said
body so that said valve element can normally
,
drain-elbow on the discharge side of said valve
freely swing out of or into engagement with- said
.element for preventing any air trapped on said
valve seat depending upon the direction of the
discharge side of said valve element from inter
fering with the free swinging operation of said
element, and a vent tube secured to said vvent
and adapted to extend into said dish
charge side of said valve element from interfer 3l). opening
washing vat for carrying into said vat any ñuids
ing with the free swinging operation of said ele
A » ñuid pressure applied to said element, and a vent
in said valve body on the discharge side of said valve seat for preventing air trapped on said dis- «
discharged through said _vent opening.
ment.
.
--
‘
'
- 7. A drain valve construction for a dishwash
ing .vat comprising a drain elbow, -a valve seat
EDGAR S. STODDARD.v
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