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Патент USA US2111836

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March 22, ‘1938.
Filed April’ 1, 1936
‘Patented Mar. 22, 1938
' 2,111,836
Robert (J. Boyd, Louisville, Ky., 'assignor to
Standard Sanitary Manufacturing Company,
a- corporation of New Jersey
Application April 1, 1936, Serial No. 72,099
6 Claims. (Cl. 137-404)
This invention relates to ball cocks forrcone failure of the valve to close under high water
trolling the supply of. water to ?ush tanks for ‘pressure conditions.
A further object of the invention resides in a
closet bowls, and more particularly to an im- '
provement for eliminating noise‘ in connection ball cock structure wherein expansion of volume
5 with the operation of such ball cocks. Structures
of the general character herein referred to have
, hitherto taken two common forms, _viz., a struc
ture in-which a ?exible membrane fixed as to
position is used to put back pressure on the main
10 valve and a structure having controls constructed
of in?exible rigid materials. Both these forms
of construction ‘have’ recognized disadvantages.
and decrease in velocity of water is secured at 5
the valve seat thereof thus eliminating the op
erational noises of prior structures.
A further object- of the invention is to provide a
‘silencing device for'a ball cock that will act also
as a check valve to prevent the syphoning of 10
water ‘from the ?ush tank into. the‘ service or
supply line in case a vacuum develops in the
In the former case the time of re?lling the tank
Other objects of the invention will be apparent
is unreasonably prolonged at low water pressures,
15 ‘ the development of noisy operation increaseswith from the following description taken in conlunc- 15
increasing water‘ pressures particularly under ' tion with the accompanying drawing, in which:
Figure 1 is aview. in part fragmentary, and.
conditions of’ high water pressure'and the valve
construction fails to close at the high water
pressures because of the back pressure on the.
20 plunger used which is of the usual type having
acomparatively large cross-sectional area. In
the latter case, due to the use of in?exible rigid
materials, the e?lciency in reducing noise is
materially impaired due to the nature of the
25 materials themselves'and' the lack of means for
obtaining an ‘expandingvolume and decreasing
- velocity effect.
The latter type is further ob
jectionable in that due ‘to the non-resilience of
the parts it is impossible to obtain a back pressure
on the main valve during the entire closing period,
3 thus precluding objectionable closing noise and if
the control is su?iciently restricted to prevent
noise at high pressures the valve will not close
due to'back pressure on the usual type of plunger
35 with a relatively large cross-sectional area. The
latter type further is relatively in?ective in pre
partly in section, of a ball cock provided with
silencing. means embodying one form of the ill-'
Fig. 2 is a partial view of the ball cock- in side
elevation as seen looking from right to leit in
Fig. 1; and
Fig. 3 is a view. in section'of an adjustable
member or support for the silencing means em- 25
bodied in the ball’ cock.
Throughout the drawing and the speci?ca
tion, like reference characters indicate like parts.
In Fig. 1 of the drawing,ca ball cock I is shown
which is mounted at the topof a ?ush water 30
supply pipe 2 located within'th'e ?ush tank for
a closet‘bowl.
The bottom of the pipe 2 is con
nected through the bottom 3 of the flush tank
to a ?tting 4 to which the water service or supply
line (not shown) is connected. The ball cock 35
is operated in accordance with water level by ‘
means of a ?oat 5 connected by a system of
levers 6 and ‘land a link 8, lever ‘I being con
An object of this» invention is to provide a ball nected to a stem ii of the cock ‘in such fashion _
40 cock having means for silencing the ?ow of water ‘ as to raise the stem and open ‘the cock when ?oat 4o
venting back siphonage in case a vacuum de
velops in the water supply line.
through it, and which may be adjusted for quiet
5 has, descended‘ with falling water level to a
or noiseless operation over a wide range of water predetermined point and to lower the stem and
close the cock as the water level rises, the cock
Another object of the invention is to provide a coming to its fully closed position when the
level reaches a desired predetermined level 45
.45 silencing device for ball cocks which is self» water
which can be regulated by properly adjustingthe
regulating or ' self-adjusting according to the
velocity of water discharging from the cockso
that the device will be effective to silence the cock
in wide open position as well as in its near closed
50 position and thereby eliminate the“ so-‘called clos
cock operating mechanism.
When the ?ush valve (not shown) otthe tank
is opened, and after the water level in the tank
has dropped to a predetermined level, the ?oat so
ing noises present in the customary-types of so- ' and associated lever mechanism open the ball
' called noiseless ball cocks. An additional object cock- and water flows from the supply line up pipe
of my‘inve'ntion resides in a structure of the kind
set forth 'wherein'the plunger stem is of rela
55 tively small cross-sectional area thus preventing
2‘ through the ball cock and thence downwardly
through a tube II, usually calleda hush‘ tube.
and ‘discharges into the tank at the bottom there- 55
of. Water also discharges from the cock through
a re?ll tube [2 for a purpose well understood in
this art.
25 is designed to serve as the bonnet or cap for
the' cock body and so is threaded into the top
of the same. Plug 25 is provided with a bore 32
to accommodate and guide stem 9. The dia
phragm or member 26 is secured to the lower
Ball cock I comprises a body l3 having at its
lower end a ?tting I4 which is threaded into the
lower end of the body and in which the top of the ,end of the plug by a ?anged nut‘ 33 which is
pipe 2 is threaded. This ?tting H has a tapered threaded into a gland 34 having packing therein
inlet passage I5 therein which terminates in a to prevent leakage through the plug.
restricted passage I6 formed by an annular ?ange
The plughbecause of its threaded connection
10 I1 that serves as a seat for the ball‘cock.
cock includes stem 9' having a yoke [8 at its
with the cock body, can be adjusted axially of i
stem 9 to regulate the back' pressure acting on
upper end through which lever 1 extends, and an - valve ‘IQ for any given velocity of flow and pres- enlargedyalve portion at its lower end, com
sure of the water supply. The flow passage 24
prising a threaded enlarged portion I 9 on the being adjustable, it is apparent that the velocity
15 lower face of which a valve disc 20 of relatively
of the water can be reduced as desired, but the I
soft material is secured by means of a ferrule velocity reduction is not at the expense of volu
2| threaded on portion I9.
metric rate of ?ow as the flow passage 24 gradu
The diameter of stem 9 is small compared to ally increases in area from the back pressure
the diameter of the ferrule 2| so that the dif
chamber to the discharge chamber ‘formed in
20 ference between the areas of the lower and upper ' part by groove 3| of the plug. .
faces or lands of the valve enclosed by the fer
The membrane or diaphragm employed is one
rule and exposed to the water pressure will be rel
having such shape and resiliency that it normally
atively slight. If the difference between the areas tends to expand towards seat or surface 21. It
of these faces is small, the valve will always close, will therefore respond to water velocity and when
25 whereas if the diameter of stem 9 were large
the velocity is at its highest, that is, when the
compared to the diameter of ferrule 2 I, the water cock is wide open, will allow the How passage 24 to
pressure acting at the inlet l5 of the valve would increase, but at the same time give sufficient
prevent closing of the cock.v In-other words,
30 the diameter of stem 9 should be such that in
restriction to reduce noise.
As ‘ valve l9 ap
proaches closed position, the water velocity de
effect a substantially balanced valve is obtained. creases but because of the resiliency of the dia
In the ordinary ball cock, the ?ow of water phragm, the diaphragm moves towards surface
through the valve is attended with considerable 21 thereby restricting the flow area in response
noise because of the high velocity which the vto the reduction in velocity and therefore con
35 water attains in passing through the valve, and vtinues to perform its noise-reducing function and
the resultant high pressure drop through it. In eliminate .the so-called closing noise. accordance with this invention this noise is elim
It is therefore apparent that for a given set
inated by providing a silencing device 22 which ting of plug 25, the diaphragm varies the flow
can be adjusted to regulate the back pressure area of passage 24 in accordance with the velocity
acting on the valve to a value where the noise of the water passing through the cock. The
_is eliminated. This device not only eliminates diaphragm therefore is automatic in its regu
noise when the velocity of .the water through the lation of the back pressure in the back pressure
cock is highest, 1. e., when the valve is wide chamber 23 and is therefore operative as a
open, but, because of its construction adjusts silencer throughout the full control range of the
cock, 1. e. the range between the wide-open and
45 itself automatically to decreasing velocity of the
water through ‘the valve as it approaches its the fully closed positions thereof.
closed position, and remains'eifectlve to. reduce
The membrane or diaphragm, as stated here
noise, and particularly that noise which is known tofore, may be made of a suitable resilient or
as closing noise.
?exible material such as rubber, rubberized fab
The silencing device 22 is disposed between the ric, leather, or any other suitable material which
outlet of body l3 and the inlet passage and forms is resilient and ?exible, not readily destructible
with the body a back pressure chamber 23. As by the action of water thereon, and which will
may be. seen in Fig. 1, the flow area of chamber accomplish the intended purpose. This member
23 is large compared to the flow area of passage need not be preshaped to conform to surface 21
55 l6 and that the back pressure in the chamber
adjacent the bottom of the plug as it may be
is dependent largely upon the ?ow area of the flat as shown in Fig. 3, or it may be preshaped
passageway 24, which isvadjustable, and formed to conform generally to the contour of surface
between the silencing device and the adjacent 21, i. e. the membrane may be given a shape
wall of the body.
indicated by the broken lines in Fig. 3.
The silencing device comprises a plug 25 ex
_ When the plug, with its membrane or dia
tending downwardly into the valve body and phragm is assembled, the diaphragm will expand
carrying at its lower end a flexible diaphragm and contract with the velocity ‘of the water pass
or membrane 26 shaped to cooperate with an ing through the cock and in thisv way silence the
annular surface 21 that diverges towards the out
cock at all rates of ?ow through it. Besides act
65 let of the body. This surface is preferably an
ing as a silencer, the diaphragm will also act as
inverted frusto-conical surface formed at the a check .valve to prevent the syphoning of water
top of the back pressure chamber 23 and located from the ?ush tank into the service line in case a
at a substantial distance above the valve seat vacuum develops in the latter. If a vacuum oc
l1. _ The lower end of plug 25 is provided with a
curs in the service line, the diaphragm expands
70 surface 28 conforming in shape to surface 21. against surface 21 thereby cutting off any sy
The plug is provided with a relatively deep groove phonic flow that might tend to develop. Even 74
29 which together with wall portion 30' of the though the diaphragm should become leaky in
body forms a chamber 3| from which water ?ows service, the syphonic ?ow would still be prevented
intothe hush tube | I and the re?ll tube l2.
because the re?ll tube I2 allows free access of
In a preferred form of the invention, the plug air to chamber 3| directly above the diaphragm.
the form 'of an inverted frusto-'
which ‘is in
Having thus described the invention, what is I of
cone, a plug threadedly engaging the upper por-l,
' described as new and desired to be secured by
tion of said body and having a lower end so
shaped as to form between it and the frusto-cone
diverging upwardly, and a
'_ 1. In a ball cock of the character described, a anI annular“ ‘passage
body having a/valve controlled‘ inlet, an outlet, diexible member secured to the lower end of the
and a back pressure chamber between said inlet ' plug and lying within said annular passage, said
' and outlet, said body- having an annular surface' ?exible member being adapted to assume various
adjacent ‘the outlet, 2. support disposed within _positions in response to, conditions within the
said body and supported for ‘adjustment towards
or from said annularsurface, a ?exible resilient
5. In ‘a ball cock ofthe character described,va 10 diaphragm secured to ‘said support with its edges‘
body of ‘generally cylindrical construction the ~>
lying adjacent said annular surface and extend-, upper portion of which is larger in diameter
ing in ‘the direction of_ ?ow through the .back
' pressure chamber, said diaphragm regulating'the
it and said
5 area of the ?ow passageway between the
than = the lower 'portion and the intermediate 15
portion of which is in the form of an inverted
frusto-cone, a plug threadedly- engaging the up
per portion of said body and having a lower end
so shaped as to form between it and the frust-o
an/nular surface in accordance with
of flow to thereby regulate the pressure in the
back pressure-chamber and render the ‘cock quiet ~ cone an annular passage diverging upwardly, a 20
and substantially noiseless in operation. I
flexible member secured to the lower end of the
inlet, an outlet, flexible member being adapted to assume various
a chamber between said inlet and outlet termi
positions in response to conditions within the
hating in a frusto-conicalsurface which diverges body, a stem passing through said plug and termi-. '
. towards said outlet, and means cooperating with hating in the lower portion of the body, a valve 25
and‘having-parts shaped similarly to said surface ‘on the lower end of the stem larger in diameter,
and responsive to the velocity of ?ow through said than Ithe stem and a hollow valve-seat-forming
chamber for regulating the back‘ pressure in‘ said member threadedly engaging the lower portion of
chamber to thereby minimize and reduce ?ovf the body and communicating with a water pipe.
' noise in said inlet, said back pressure regulating
' 6. In a ball cock of the character described,
comprising a plug supported by said body ' a body of generally cylindrical-construction the
30 means,
for adjustment towards or from said annular ' upper portion'of which is‘ larger in diameter than
surface and having one end thereof adjacent
said surface to provide an annular passage there
the lower portion and the intermediate'portion
of which is in the form of an inverted frusto
between which increases in area from the outlet v.cone, a plug threadedly engaging the upper por
saidbhambewtowards'the outlet of saidnbody, ‘ tion of' said body and having a lower end so
.35 of
and a resilient ?exible diaphragm secured to said shaped as to form between it and the frusto-cone
support and having ‘its edges disposed in said an an'nular passage diverging upwardly, a ?exible’
passage and extending towards the outlet thereof. ' member secured to the lower end of the plug and
3. In‘ a ball cock of the character described, lying within said annular passage, said ?exible
‘a silencing device comprising a plug- having a member being adapted to assume various posi
40 bore extending ‘vertically therethrough, the upper
tions in response to conditions within‘ the body,
. end of the plug being substantially cylindrical and a stem passing through said plug and terminat
exteriorly threaded ‘and the lower end of the plug ing in the lower portion-of the body, a valve on
being of inverted frust'o-conical-shape, the plug the lower end of the stem' larger in diameter ‘than
between the upper cylindrical portion and the
the stem and a hollow- valve-séat—forming mem
lower frusto-conical portion being deeply grooved, ‘ ber threadedly engaging the lower portion of the
and a flexible diaphragm secured to the bottom’ , body and communicating with'a water pipe and
4. In a ball c ck of :the character described,
a body of generally cylindrical construction the
upper portion of which is larger in diameter than
‘ the lower portion and the intermediate portion
a system of levers for raising and'lowering said
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