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Патент USA US2116422

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May 3» H938.
D. H. ANDERSON
2,116,422
BACKWATER CONTROL FOR SEWERS
_
Filed April 19, 1937
2 sheets-sheet 1
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May 3, 1938.
D. H. ANDERSON
2,1 16,422
BACKWATER CONTROL FOR SEWERS
Filed April 19, 1937
2 Sheets-Sheet 2
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Patented May 3, 1938
2,116,422
UNITED STATES
lil
2,116,422
BACKWATER CONTROL
SEWERS
Dennis H. Anderson, `Paducah, Kyu
Application April 19, 1937, SerialßNo. 137,877
e claims. (el. i13_2-1.) f
This invention relates to a back-water control
for sewers.
`
`
p
Figure 7 is ay vertical section taken along the
line T_T of Figure `2, and
'
An object of the invention is the provision of a
mechanism for preventing water from a sewer
from backing up into a, conduit leading from the
sewer‘to a building while taking care of the waste
‘
Figure 8 is a vertical section showing the gate
valve cutting'olf water from` the sewer to the
building.
`
sewage from the building during the time that
" Referring more particularly to the drawings,
`I'lìÄ designates al housing in which a plurality of
the sewer has been cut off from the building.
instrumentalitíes are placed forV controlling the
f Another object of the invention is >the provision
10 of a compact unitary structure for cutting olf a
conduitV from the sewer to a building to prevent
water or` sewage from backing up into the build
ing,`lthe,device being set in operation by a float
controlled means which will cause the gate valve
15 to be moved to closed position under sufñcient
l ` force to cut through debris whichhas collected
closing of the `sewer conduit Il and of a waste
pipe I2.‘ ` The pipe |22 is connected with the usual
Waste pipe vof 'thebuilding and leads to an auxil
iary sewage tank I3. "
`
A gate’valve I 4', shown more particularly in Fig.
8 is located in a valve casing I5 incorporated in
thefp-ipe II,~ This Valve has its lower end I6 15
from a sewer to a building in which al valve is
formed into a cutting edge so that when it is
lowered with sufficient pressure it will cut through
any foreignmatter such as paper, rags, etc., so
th`at"`the`valve`will be properly seated in the V
shapedïseat I 1 and absolutely prevent the pas
sage 'f any `water in a rearward manner through
positively moved to `a closed position `when the
water rises to a predetermined height, theoperat
th‘econduit 4II when the vvalve is closed.
`
»A stem `I8`connects the valve I4 with a link I9
ing means for the Valve including a tube in com
municationwith a casing at onegend which is
and is pivotally connected at 2li to a split collar
2I"cl`amped on an operating tube or lever 22.
adapted to be ñlled with Water whereby the `tube
acting as a lever will be lowered by the weighted
The lever 22 is-"pivotally mounted `at the upper
endof a standard 23 and this standard is secured
at the valve, the debris ordinarily» preventing
closingof the valve.
" ‘Aïfurther object of the invention is the provision
20 of a back-water control for sewage pipes leading
casing.
tothe’ïfloorgß "ofthe‘housing I0. As shown more
`
This invention will be best understood from a
particularlyïin‘Figs. 3 and 4 the lever is hollow to
consideration of the following detailed descrip
provideïafpassageway _25 from a ñexible hose 25
tion, in View of the accompanying `drawings form
to1`a`casing"2il which is secured to the outer end
ing a part of the specification; nevertheless, it is
of the >lever V22,`
to be understood that the invention is not confined
to the disclosure, being susceptible of _such
changes and modiiications Vas deñne no material
departure from the salient features of the inven-h
The passageway in the lever 22 is closed at 28
to'lpr'event 'water ~from entering the lower end of
said tubemor levert. The flexible tube 26 is con 35
nected‘at one end‘to a nipple 29 leading into the
tion as expressed in the appendedclaims.
passage `25 >inthe lever 22 while the other end
`In the drawings:
‘
_ '
Figure l is a View in perspective _of an arrange
ment for preventing back-water from a sewer
‘entering a building and for takingcare ¿of the
sewage during the closing of the sewer pipe,
Figure 2 is a view in perspective of the arrange
ment for causing closing of the sewer pipe,
Figure 3 is an enlarged vertical section ofthe
tube and casing operating as a lever control,` '
Figure 4 is: a fragmentary enlarged vertical
section of the device for controlling the flow of
water to the Valve operating lever, `
‘ , Figure 5 is a vertical section of the cushion~
ing means for the operating lever,
Figure 6 is a fragmentary view in perspective of
the sewer pipe and `com'iections‘with thetank for'
afloat,
`
of the tubfe‘Zßzis connected to a pipe 30 in which
is incorporated a valve 3i.4 The pipe 30 passes
through the housing Ii), as‘shown at 32, and is
connected witha fresh water supply under sufñ
cient pressure to force water through the tube 22
40
andinto the casing 2l.
`
` A valve stern 33` is `connected at 3151 with a collar
35 secured to the inner end ofthe lever 22. 'I‘he
stem‘extendsinto a valve member 36 and a valve
connected tothe stem is identical with that shown
in Fig. 3. ` The Valve member 36 is incorporated in
the waste pipe I2 andthis valve is closed alter
nately when the valve I4 is opened and vice versa. 50
`Afloattank 40 is placed in communication with
the sewer pipeII îby means of alpipe 4l which
is `flattened or oval in cross section so that when
the l_water backs upin the second `conduit Il, this
waterwilliflow into thetankAßand raise a float
2
2,116,422
42 a predetermined distance. A rod 43 extends
>upwardly from the float 42 and passes through an
opening 44 in a bracket 45 which supports the pipe
38 above the bracket.
The rod is supplied with a’pin 46 which moves
Uli
in an elongated slot 41 formed at one end of a
lever 48 which is connected to a stem 49 of the
Valve 3| which controls the flow of fresh water
from the source to the interior of the lever 22.
A standard 58 is secured to the outer end of the
10
bracket 45 and pivotally supports a lever 5| at 52.
One end or” the lever is provided with an elon
gated slot 53 in which rides a pin 54 secured to
the upper end of the rod 43.
A rod 55 is provided with an elongated slot 56
in which rides a pin 51 secured to an end of the
lever 5|. The opposite end of the rod 55 is con
nected to a crank 58 and this crank is secured
to a stem 59 of a valve 68. This valve releases
20 water from the pipe 22 and is incorporated in a
drain 6I extending from the tubular lever 22.
The casing 21 is in communication with the
tubular lever 22, as shown at 62. A pair of guides
63 and 64 extend outwardly from one end of the
casing 21 and engage a post 65 secured to the floor
24 of the housing I8. The post and the guides
maintain the casing in a vertical plane when said
casing is moved upwardly or downwardly. A
cable 66 secured to the guide member 63 extends
over a pulley 61 and a weight 68 is secured to
the lower end of the cable. This weight is sufli
cient to maintain the casing 21 in its uppermost
position when said casing is substantially free of
water.
35
40
45
50
55
A cushioning means, generally designated by
the numeral 18, is shown in Figs. 2 and 5 and
includes a piston 1| movable in a cylinder 12.
A spring 13 opposes the downward movement of
the piston 1| so that the piston is normally main
tained in its uppermost position in the cylinder.
A rod 'I4 extends through an opening in the top
of the cylinder 12 and is provided with a saddle
15 adapted to receive the tubular lever 22 when
it has moved to its downward position.
A U-shaped pipe 16 has a valve 11 incorporated
therein intermediate the ends of the U-shaped
member and is adapted to be set in a predeter
mined position for controlling the ñow of fluid
from the topy to the bottom of the cylinder 12 and
vice versa. One leg 18 of the member 16 is in
communication with the top of the cylinder while
the other end leg 18 of the member 16 is in com
munication with the lower end of the cylinder.
This cylinder is partially ñlled with oil or some
other suitable liquid which will flow from one
end of the cylinder to the other, depending upon
the position of the piston 1I. The rate of ñow of
the liquid to the opposite ends of the cylinder is
controlled by the valve 11. Thus it will be seen
60 that when the tubular member 22 is lowered as
the casing 21 is ñlled with water, the saddle 15
will receive the said member and the lever will be
gradually lowered and the rate of lowering at
this time will depend upon the setting of the
65 valve 11 as has been previously explained.
The casing 21 is provided with a valve 88 which
is normally seated and mounted in a sleeve 8|
which projects into the top of the casing 21. A
spring 82 resting upon the top of a grid 83 nor
70 mally maintains the valve in engagement with its
v75
seat. However, when water is discharged from
the casing 21 the valve 88 will open against the
tension of the spring 82 and permit air to enter
said casing. 'I'he valve or the top of the casing
may have a small passage therein to permit the
escape of air when water is admitted to the cas
ing.
It will be noted from Fig. 2 that the bottom 24
of the casing I8 is provided with a plurality of
perforations 85 to permit water which has been
discharged from the pipe 22 into the housing I8
to drain into a gravel pit 86. However, a valve is
provided on the floor 24 to permit the discharge
of water from the housing I8 by manual opera
tion of the valve as desired. This valve, as shown 10
in Figs. 2 and '7, consists of a nipple 81 having
elongated slots 88 in its side walls and a rotatable
sleeve 89 completely enclosing the 4nipple 81. The
sleeve 89 is provided with elongated passages 98
adapted to align with the passages 88 to permit 15
the water from the housing I8 to escape to the
gravel pit 86. A socket wrench 9| having a handle
92 is adapted to operate the sleeve 89 and this
handle extends through an opening 93 in the top
of the housing I8, whereby the stem may be 20
manipulated exteriorly of the housing.
The top of the housing is provided with an
opening 94 and this is normally closed by a cover
plate 95 and this cover plate is maintained in posi
tion by means of the thumb screws 96.
25
The tank I3 serves as an auxiliary tank to col
lect the sewage during the time that the valve I4
is closed whereby waste from the building will
be conducted to this tank until the time arrives
when the valve I4 is automatically opened by the
lowering of the water in the sewer and the con
duit II.
The pipe I2 leads directly into the tank I3 and
has embodied therein a valve |88 operated by a
stem IUI. A lever |82 is connected to the end
of said stem and is provided with a yoke |83 which
is received by a rod |84.
A float |85 is connected to the rod |84 and
normally rests upon the bottom |86 of the tank
I3 when said tank is empty but is elevated by the
rising sewage.
A stop |81 is adjustably secured to the rod and
is adapted to engage the yoke |83 and raise the
lever |82 for closing the valve |88 when the sew
age has elevated the float and rod to a prede
termined height in the tank.
A second lever |88 is secured to the end of a
valve stem |89 and this lever has a yoke II8
receiving the rod |84 and spaced from the yoke
|83. An adjustable stop I II is secured to the rod
|84 above the yoke and is adapted to engage the
yoke |I8 and move the lever downwardly when
the float |85 is lowered.
A pipe I|2 enters the tank I3 and has a nozzle
|I3 for discharging compressed air into the tank
Aon top of the sewage in said tank with suñicient
30
35
40
45
50
55
pressure to force the sewage through an outlet
pipe II4 to the sewer. A valve II5 is mounted
in the pipe I I2 and is operatively connected with
the stem |89. The pipe I|2 is in communication 60
with a compressed air supply (not shown) .
A link II 6 is pivotally connected at its ends
with the yokes I 83 and II8 so that when the
yoke |83 is elevated by the stop |81 to close the
valve |88 to cut off sewage from the pipe I2, the 65
valve |I5 is opened to admit compressed air.
When the sewage is lowered suñ‘lciently in the
tank I3, the float |85 and rod |84 will have
reached a position such that the stop III will
engage the yoke I I8 and thus depress both levers 70
|82 and ||8. The valve I|5 will be closed to
cut off the compressed air and valve |88 will be
opened to admit sewage when the valve 36 has
been opened as has been previously explained.
The outlet pipe II4 has an open end disposed 75
2,116,422
in a sump „l l6 projecting lbelowtheiioor M0601'
the .tank I3 .andin open communication with said
tank. `Said pipe has `an extension II1 located
‘ exteriorly of tankand this extension is connected
.with the sewer :at a point which is Vbetweenthe
60 since yotherwise the‘valve would be ,opened as
soongasfthe lever started nto `descend whence the
Weight 68 would return vthe casing to itsiupward
position.`
'
.i
i
I
I
,
‘
i
valve `I4 and the main sewerßpipe.
An elevated pocket, IIB von the top 1I I9 of the
tank permits the rodito be elevated V,the „proper
height. A manhole |20 `is ,removably secured at
|2I to the top- of the tank to permit a mechanic
to inspect, to‘make .adjustments of the stops 891
‘1. `A back-water control for sewers comprising
alhousing, a `tube pivotally mounted intermediate
its ends, a casing’at onelend of the tube and in
communication therewith,- means for supplying
water to the tube and casing tocause tilting of 10
said _casing and tube, a valve controlling the
and lll ¿and to make `repairs when necessary.
The operation of my device is as follows: `The
parts ofthe apparatus shown in Fig. 2 are such
that the `valve I4 in the conduit `I I is open andthe
casing 21 is `in its .elevatedposition At rthis time
thefvalveSI for the freshwater supply is closed
andthe drain valve 166 is open. At this timealso
the float 42 is `in >its lowermost position `in the
tank ‘4D `and. `the waste Water from the building is
supply means, a ,sewer pipe, a `float chamber in
communication with the sewer‘pipe, a `float in the
chamber and means connecting `the float with
the valvejso that when the iioat rises the valve 15
will be opened, a gate valve in the sewer pipe and
connected to the tube so that when said tubeiis
lowered the valve‘w'ill be closed,.a drain for the
tube, and `means operated by the float for open
ing Lthedrain when the iioat is lowered.
20
2. A back-water Vcontrol for sewers comprising
normally passing through `the conduit II to -the
When the waterrffrom’ the sewer, how-v
aihousing, a tubeipivotally >mounted intermediate
ever, backs up `into `the :conduit-II suiiiciently
for -the water to ñowinto the‘pipe '4I' to the tank
25 40 the :ñoat 42 is then elevated by the ‘rise oi
water in the tank 40 andthe rod 43 will then ele
vate the end of the lever 43 and open the Valve
35|. The water then passesïthrough the tubing
26 into the hollow lever 22 and thence into the
casing 2'1 until ’the casing is sufficiently iilled with
water to cause the same tobe lowered by gravity.
It is to be borne in mind, however, that when the
float 42 is elevated the lever 5| is operated and
the link 55 is then moved downwardly, closing
35 valve BIJ to the drain. 'I‘he casing 21 having
moved down against the action> of the weight 6B
will cause the tubular lever 22 to be received by
the saddle 15 and this casing is normally main
tained in its lowered position which is slightly
40 above a horizontal plane passing through the axis
itsiends, a `casing at one end of the: tube and in
sewage.
of the lever 22.
The weighted lever 22 through the use of the
water-filled casing 21 exerts considerable pres
sure on the stem I8 of the valve I4 so that when
45 the valve is lowered the cutting edge of the valve
will force its way through any foreign matter to
provide for a neat seating of this valve. When
`the valve I4 is closed the valve 36 will be open so
that waste water from the housing or building
50 will pass through the pipe I2, to the tank I3.
‘ When the sewage in this tank reaches a prede
termined level compressed air will force the sew
age from the tank to the sewer by means of the
pipe, as has been previously explained.
When the water in the conduit | I is lowered
55
the float 42 is likewise lowered, thereby moving
the lever 48 and cutting off the water to the hol
low lever 22 in the casing 21.
The lowering of the float 22 also causes the
60 lever 5| to be moved and likewise‘ the stem 55
connected with the crank 58 of the valve 6I).
However, since the lever 22 is in its lowermost
position, the pin 51 is in the uppermost position
of the slot 56 so that when the float 42 is lowered
65 the stem 55 will be shifted and the valve 60 will
be moved to open position to permit water from
the casing 21 and the tubular lever 22 to be dis
charged into the housing I I).
As soon as the water is discharged from the
70 casing 21 and the tubular lever 22 the weight 68
. will then return the casing 21 to its uppermost
position and the valve I4 will be opened while
the valve 36 will be closed.
The slot 56 and the pin 51 permit the lever 22
75 to be lowered without the crank opening the valve
communication therewith, means forrsupplying`
water to the‘tube. and casing to causestilting of 25
said casing andtube, a valve controlling the sup
ply means, a sewer pipe, a float chamber in
communication with the sewer pipe,.a float inthe
chamber and means connecting the float with
the valve so that «when the iioat‘risesithe valve 30
will vbe opened, agatevalvein the sewer pipe and
connected to the tube at one side of the pivotal
mounting of the tube so that when said tube is
lowered the valve will be closed, a drain for the
tube, means operated by the float for opening 35
the drain when the iioat is lowered, an auxiliary
tank, an auxiliary sewer pipe leading to the tank,
a valve in the pipe, means connecting the valve
with the tube at the other side of the pivotal
mounting so that when the gate valve in the sewer
pipe is closed the valve in the auxiliary sewer 40
pipe will be open.
3. A back-water control for sewers comprising
a tube pivotally mounted intermediate its ends,
a casing secured to and communicating with a
free end of the tube, a water supply means for 45
the tube and casing, a valve controlling the supply
means, a ñoat elevated by a back-water rise in
the sewer, connected to the valve and causing
opening of said Valve to fill the casing, a sewer
cut-oli valve operated by the lowering tube, a 50
drain connected to the tube, a valve controlling
the drain, means connecting the last-mentioned
valve with the float so that when water is lowered
in the sewer the ñoat will cause the last-men
tioned valve to o-pen and the first-mentioned 55
valve to close, and means to cause the casing and
the tube to rise when said members have been
drained.
4. A back-water control for sewers comprising
a tube pivotally mounted intermediate its ends, 60
a casing secured to and communicating with a
free end of the tube, a water supply means for
the tube and casing, a valve controlling the sup
ply means, a float elevated by a back-water rise
in the sewer, connected to the valve and causing 65
opening of said valve toflll the casing, a sewer
cut-off valve operated by the lowering tube, a
drain connected to the tube, a valve controlling
the drain and means connecting the last-men
tioned valve with the float so that when water 70
is lowered in the sewer the float will cause the
last-mentioned valve to open and the iirst-men
tioned valve to close, means to cause the casing
and the tube to rise when said members have
been drained, the connecting means for the last 75
4
2,116,422
mentioned valve including means to prevent open
ing of said valve when the tube and casing are
lowered.
5. A sewage control for buildings comprising a
conduitv leading from a building to a sewer, a
valve for closing the conduit when water from
the sewer rises in .the conduit, means for closing
said valve, an auxiliary tank for sewage from the
building when the conduit is closed, a waste pipe
10 of the building connected with the tank, a valve
when the water backs up in the conduit, an outlet
pipe from the tank to the sewer, a float-controlled
means for causing the sewage in the tank to be
forced from the tank to the sewer.
'
8. A sewage control for buildings, a conduit 5
leading from the building to the sewer, a tank
in communication with the conduit, a slidably
mounted valve in the conduit, said valve having
a cutting edge, weighted means for closing the
valve with suflicient force to cause the valve to 10
in the waste pipe adapted to be opened by the
cut through foreign matter collecting at the valve,
means which closes the ñrst valve, means for
said weighted means including a casing, means
causing pressure to be applied to the interior of
the tank for forcing out sewage, a float-controlled
15 means in the tank for causing actuation of the
last-mentioned means.
6. A sewage control for buildings comprising a
conduit from a building to a sewer, a valve in the
conduit, an auxiliary tank for sewage, a. waste
20 pipe leading to the tank, a valve in the pipe,
means for alternately closing the valve in the
conduit and opening the valve in the pipe, means
controlling the said last-mentioned means when
the water backs up in the conduit.
7. A sewage control for buildings comprising a
conduit from a building to a sewer, a valve in
the conduit, an auxiliary tank for sewage, a
waste pipe leading to the tank, a valve in the
pipe, means for alternately closing the valve in
30 the conduit and opening the valve in the pipe,
means controlling said last-mentioned means
for supplying the casing with a liquid when the
sewage from the conduit rises in the tank, and
means actuated by the rise of the sewage in the 15
tank for controlling the supplying means.
9. In a sewage control for buildings, a conduit
leading from the building to the sewer, a tank in
communication with the conduit, a slidably
mounted valve in the conduit, said valve having 20
a cutting edge, weighted means for closing the
valve with suñicient force to cause the valve to
cut through foreign matter collecting at the
valve, and cushioning means for the weighted
means to protect the valve against injury, said 25
weighted means including a casing, means for
supplying the casing with a liquid when the
sewage from the conduit rises in the tank, and
means actuated by the rise of the sewage in
the tank for controlling the supplying means.
30
DENNIS H. ANDERSON.
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