close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2131430

код для вставки
Sept. 27, 1938.
A. c. 'DoBRlcK ET AL
VACUUM BREAKER
original Filed Nov. '25, 1955
@Y
v'
2,131,430
n
2 sheets-sheet 1
Sept. 27, 1938.
A.- c. DoBRlcK ET Al.
2,131,430
VACUUM B_REAKER
Original Filed Nov. >25, 1935
2 Sheets-Sheet 2
Patented Sept. 27‘, 1938 ' l
y
UNITED STATES PATENT oFEicE
VACUUM BREAKER
August C. Dobrick and Ralph A, Tank, Chicago,
Ill., assignors to The Imperial Brass Manufac
turing Company, Chicago, Ill., a corporation
of Illinois
Application'A November z5, 1935, serial No. 51,382
~
Renewed March 3, 1,938
18 Claims. (Cl. 137-69)
Our invention is concerned with vacuum said end with the gasket 24 interposed> in the
breakers for use with flush valves, etc., of the customary manner.
f
type shown in the patent to William C. Shanley, ’
The upper end of the casing I8 is secured to
No. 2,087,049, granted July 13, 1937, in which the
5 pipe between the valve and the bowl or similar
member is provided with an -air inlet to prevent
back-Siphonage, vand a valve cooperating therewith to prevent the possibility of any water being
` forced outward through the air inlet during the
10 flushing operation, as may tend to occur where
the back-pressure is unusually high.
In the vacuum breaker shown in the aforesaid
the inlet member by the annulus 24’ which` is
externally threaded to screw into the top of
the casing I8, and internally threaded tov screw
onto the reduced portion 25 of the inlet member
I4. 'I‘he annulus 24'* is preferably sweated or
otherwise permanently. secured upon the member
I4. The air inlets 25, preferably four in number
and of the shape shown in Figs. 2 and 4, extend
through the annulus 24' and are protected from
Shanley application, the valve and its casing are
located outside of and to one side of- the pipe,
15 making an -asymmetrical structure and one in
the entry of anything except air ,by the skirt 2l
preferably formed integrally with the member`
I4 and extending over the inlets 26, and thence 15
which the valve casing protrudes so that it is
downwardly. v
likely» to be accidentally struck and possibly
knocked off. In our improved construction the
member carrying the inlet takes the _form of
What may be considered as added features to
the structure of the vacuum breaker of the afore
said Shanley application No. 6,761 will now be
20 annulus with the axis of the pipe as a center, so
as to prevent any objectionable projections, and
the valve is preferably held open by gravity instead of closed, as in the aforesaid Shanley
vacuum breaker.
25 ‘To illustrate our invention we annex hereto
two sheets of drawings in which the same reference characters are used to designate identical
parts in all the ñgures, of whichFlg. 1 is a side elevation of a flush valve with
30 our vacuum breaker applied thereto.
Fig. 2 is a central vertical section of the vacuum
breaker on an enlarged scale.
'
Fig. 3 is a portion of a similar view but with
the parts _shown in their non-flushing position.
35 ' Figs. 4, 5 and 6 are horizontal sections on the
lines 4_4, 5_5, and 6-6 of Figsg2 and 3.
As usual, the supply pipe I0 to be protected
opens into a hush valve II, which may be of any
desired construction, operated by the handle I2
40 and having the outlet I3 upon which is screwed
the inlet member I4 by the connection I5, preferably integral with the -body portion I5 which
- has its internal cross section tapered, as seen at
I'l, to produce a nozzle effect as shown in the
45 vacuum breaker of the Shanley application No.
6,761 ñìed February 15, 1935, upon which our
invention in some respects may be considered to
be an improvement. The casing member Il is in
the form of agenerally cylindrical shell with
A50 the inwardly and downwardly -inclined flange
portion I9 forming a reduced outlet 20 of an
5
_
10
-
.
described. Instead of having the nozzle inte- 20
gral for its entire length, the lower part 28 is
formed of a separate tube, preferably with the
vertical ribs 29 on its exterior and with its upper
end threaded into the annulus 24" and contact
ing the portion 25 to form a continuous outlet. _25
Ears 30 project from the lower end of the part
28, and pivoted on the ears are `the hinged p0r
tions 3| of the ñaps 32, preferably two in num
ber, by the pins 33,`which are loosely mounted in
the aperturesof the ears 30 and the portions 3I 30 _
so that there can never beany danger of bind
ing due to corrosion or possible impurities in the
water. To insure the pins 33 remaining in place,
we, as seen in Fig. 5, make them so long that
_their ends almost contact withI the casing I8. 35
The hinged portions' 3| ` are shaped, as seen in
Figs. 2 and 3, so as to cooperate with the annular
valve member 34 which preferably has-'the rub
ber seat 35 set „in its upper portion to cooperate
with the annular seat formed by the annular ribs 4o
35_projecting downwardly from and forming the .
bottom of „an annular channel 31 in the annulus
24’ and extending to the air inlets 26. 'I'he ribs
29 guide the member 34 and reduce any- possible
friction. As seen in Fig. 5, the semi-annular 45
ñaps 32 do not quite meet at their edges so that
a passage for air from the outside up through
the inlet member I4 always exists when the valve
II is not in operation, and the weight of the
, annulus 24 resting on the hinged members 3| 60
. holds them closed, as' seen in Fig. 3. Instead of
vleaving a passage between the flaps, we might
area slightly larger than that of the nozzle outlet 28. Its lower end is externally threadedv so -form one_„or two small apertures therethrough, as
that the threaded connection 22 may be usecl- to indicated in dotted lines at 38 in Fig. 5. When, _
55 secure the flanged upper end of the pipe 23 to however, the flushing, occurs, as indicated in Fig. 66
2,131,430
2
2, the flow of the water swings the flaps 32 to the
position shown, and the hinged members 3| lift
the annulus to the position shown, sealing the air
inlets -2li and preventing the possibility of any
Ul water being forced out through them by back'
pressure, no matter how strong.
While we have shown and described our inven
tion as embodied in the form which we at present
9. A vacuum breaker as defined in claim 1 yin
which there are a pair of flaps pivoted to the noz
zle substantially closing its outlet, and in which
there are a plurality of arcuate air inlets located
in an annulus connecting the tops of the cham
ber and the nozzle and the valve member is an
annulus beneath the inlets resting directly on por
consider best adapted to carry out its purposes,
it will be understood that it is capable of modiñ
cation, and that We do not desire to be limited
in the interpretation of the following claims
tions of the flaps to hold them against the nozzle
outlet.
10. In a vacuum breaker, the combination with 10
except as may be necessitated by the state of the
prior art.
_
What we claim is new, and desire to secure by
Letters Patent of the United States is:
1. In a. vacuum breaker, the combination with
a chamber having an outlet through which a
liquid is discharged at intervals, of a nozzle ex
tending thereinto well toward the outlet, a flap
a cylindrical chamber having an outlet at its
bottom, of a nozzle let into the top thereof and
extending towards its outlet and concentric
therewith, an apertured annulus connecting the
top of the chamber and the upper part of the 15
nozzle, a nap cooperating with the outlet of the
nozzle, and an annular valve member surrounding
the nozzle and located between the flap and the
apertured annulus and moved by the former` to 20
held by gravity against the outlet of said nozzle
when there is no discharge of the liquid, an air
inlet to said chamber concentric with the noz
zle, and a valve member cooperating with the air
inlet controlled by the flap.
2. In a vacuum breaker, the combination with
a chamber having an outlet, of a nozzle extend
ing thereinto well toward the outlet, a pair of flaps
pivoted on the nozzle and held by gravity against
the end of the nozzle, an air inlet to said chamber
concentric with the nozzle, and a valve member
cooperating with the flaps and moved thereby to
engage it with the latter.
11. A vacuum breaker as defined in claim 10 in
which there are a pair of flaps pivoted to the bot
tom of the nozzle.
tom of the nozzle and the annular valve member
normally rests directly on portions of the flaps.
13. A vacuum breaker as defined in claim 10 in
which there are a pair of flaps loosely pivoted to
the bottom of the nozzle by pins passing loosely 30
through the pivotal portion of the flaps and ears
on the nozzle and extending to the inner wall of
the chamber.
engage the inlet.
3. A vacuum breaker as` defined in claim 1 in
which the valve member> holds the flap to the
\ nozzle.
- 4. A vacuum breaker as defined in claim 1 in
which the flap is pivoted to the nozzle and the
valve member rests on a portion of the flap to
40 hold it normally to the nozzle outlet.
5. A vacuum breaker as defined in claim 1 in
which there are a pair of flaps pivoted to the
nozzle substantially closing its outlet and the an
nular valve member rests on portions of the ñaps.
'
12. A vacuum breaker as defined in claim 10 in
which there are a pair of flaps pivoted to the bot 25
'
.
~
14. A vacuum breaker as defined in claim 10 in
which there are vertical ribs interposed between 35
the exterior of the nozzle and the interior of the
annular valve member to position the latter and
to reduce friction.
15. A vacuum breaker as defined in claim 10 in
which there are vertical ribs on the exterior of 40
the nozzle to position the annular valve member
and to reduce friction.
16. A vacuum breaker as defined in claim 10 in
which there is a skirt extending from the top of
the nozzle over the apertured annulus and thence 45
6. A vacuum breaker as defined in claim 1 in
which the air inlet is located in an annulus con
downward.
necting the tops of the chamber and the nozzle.
which the nozzle is composed of two parts with
the lower part having the ilap‘pivoted thereto
and with the upper part threaded to the aper
tured annulus.
'1. A vacuum breaker as defined in claim 1 in
which there are a plurality of arcuate air inlets
in an annulus connecting the tops of the chamber
and the nozzle.
8. A vacuum breaker as defined in claim 1 in
which a plurality of arcuate air inlets are located
in an annulus connecting the tops of the chamber
and the nozzle and the valve member is an an
55 nulus beneath the inlets and rests directly on
portions of the flaps to hold them against the
nozzle outlet.
17. A vacuum breaker as defined in claim 10 in
18. A vacuum breaker as defined in claim 10 in
which the apertured annulus has a pair of an
nular members projecting downwardly from its
under side forming Va valve seat with which the
annular valve member cooperates.
AUGUST C.- DOBRICK.
RALPH A. TANK.
Документ
Категория
Без категории
Просмотров
0
Размер файла
359 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа