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Патент USA US2111852

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March 22, 193s.
'Fileçl Aug. 1'0, 1937
2 sheets-sheet 1
March 22, 193s.>
Filed Aug. lo, i957
2,111,852 '
2 Sheedzz-s-ShevetY v22
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Patented Mar. 22,l 1938
' 2,111,852
- 2,111,852
Henry K. Flinchbaugh, York, Pa.
Application August 10, 1937, Serial No. 158,288
(Cl. 226-127)
8 Claims.
My invention relates to automatic valves and
particularly to ones which are actuated to close by
the submergence of the nozzle end' in the liquid
which has been discharged -into a receptacle.
5 Still more speciñcally, my invention is concerned
with automatic valves for gasoline dispensing
nozzles which automatically stop the flow of 4gaso
line when ,the gasoline in the container being filled J
submerges the end of the dispensing nozzle.
This invention is a modiñcation of my previous
invention shown in my applications for United
States Letters Patent tiled September 16, 1936,
Serial No. 101,022, and the present application is
a continuationI in part of the said earlier applica
tion as to all common subject-matter.
is the provision of a simple and positively op
erating automatic valve for the nozzle of a gasoline
dispensing unit, which can'be depended upon to
shut off the flow of gasoline when the end of the
20 nozzle becomes submerged. Other objects and
advantages will appear from the following'de
tailed description of a preferred embodiment of4
my invention, reference being had to the accom
_ panying drawings.
fit an adjustment element I1. This adjustment
element Il regulates the sensitivity of the valve
and this adjustment is Aeffected by moving the ele- '15
ment Il! in or out. The farther the element I1
projects, the greater impediment it is to the fluid
stream through the valve 3.
When a `greater _
port-ion of the element I'l is exposed to the pres
sure -of the fluid stream, it isclear that the re
solved force urging the element Il downward 20
against the pressure of the operating cylinder 4
is correspondingly increased. The angle of the
ñuid stream impinging on the element Il causes
this resultant downward force. Hence the sensi
of the nozzle, the automatic valve being open.
of the element I1.
Fig. III is la sectional view taken on the line
III-_III of Fig. I.
Fig. IV is a sectional view takenon the line
Je Iv-IV of Fig. I.
Fig. V is a perspective view of the closure valve.
Fig. VI is a perspective view of the operating
cylinder in which the stem of the closure» valve
Fig. VII , is a perspective view of the spray
For the purposes of a detailed description of the
device shown in the drawings, that device may be
conveniently analyzed into an outer nozzle l with
hand control valve 2, an automatic valve .3 having
an operating cylinder 4, an internal nozzle 5 and
a, spray control tube 6 separated by an annular
55 recess 1 from said internal nozzle 5.
' On the end of the valve stem ID is a piston I3
which works in the cylinder 4. in an obvious man
ner. Around the stem l0 is a coil spring I9 urg
ing the piston I8 upward and the valve 3 open.`
In order to avoid the danger of ñuid collection
in the cylinder Il, drainage conduits 20 are pro
vided leading into conduit i6.
. At the upper end of the cylinder 4 is a head 23
in threaded engagement with the cylinder I.
This head 23 is shown in perspective in Fig. IX.
In the head 23 is formed an inlet conduit 25 com
control tube positioned at the end of the nozzle.
Fig. VIII is a perspective view of the internal
nozzle/positioned between the spray control tube
and the operating cylinder mentioned above.
Fig.' IX is a perspective view> of the removable
end of the operating cylinder having an automatic
slide valve formed therein.
Extending longitudinally through the valve 3 10
and its stem I0 is a conduit1 I6. 'I'he lower end
tivity of the automatic operation of the valve N 5
3 may be regulated by varying this resultant
force through changing the degree of projection
' the automatic valve closed.
convergence makes the internal nozzle 5 the con
striction I5.
Fig. I of the drawings is a side view of a nozzle
and hand valve, partially -in section to show the
automatic valve of my invention placed in the end.
FigpII is a side view in section of the automatic
30 valve portion of the nozzle shown in Fig. I, with
tegrally therewith and extending into the operat
ing cylinder 4. The valve 3 is formed to cause a
convergence of the fluid stream into the internal
nozzle 5 in which a valve seat Il is formed. This
of the conduit i6'is enlarged to receive in a press
ingly the principal object of my present invention
The outer nozzle l and hand control valve 2 are
of a conventional type and need not occupy us.
The automatic valve 3 has a stem I0 formed in
municating with the cylinder 4 as will be herein
after explained. A slide valve 28 slides in con
duit 29 at the bottom of which isiormed a valve
seat 3i). From the lower part of valve 28 a stem
3i depends and extends through a conduit 32 into 45
cylinder 4,. resting on top of valve stem I0. The
bottom portion of stem 3| is formed as shown in'
Fig. IX with a flattened end in order to avoid
interfering with the free ñow of liquid through
.conduit I6 in stem I0. The stem 3| i‘lts very 0
loosely in conduit 32 in order to permit the free
flow of liquid therethrough when the conduit 25
is open.
The cylinder 4 `is held in position by radially
` extending segments 34, permitting the free flow 65
of liquid through the spaces between the seg»
ments 36. At the bottom of each segment, ports
35 are formed, with conduits 36 connecting the
ports 35 to the spaces between the segments liti.
The cylinder ll is shown in_ perspective in Fig. VI.
-« These ports 35 prevent air pockets from forming
during the flow of liquid _through the closure
nozzle El. The cutting oil’ of this source of Aair
in turn. increases the draw or pull from the
center of the ñow which increases the pull on
the adjustment element I1 and the valve 3
enough to move the valve down on to its seat il.
This in turn allows the control valve 28 to move
down to its seat 30 under pressure in the outer
valve 3, and the interference with the proper nozzle i on top of the valve 28, closing the con
functioning of the device caused by such air ' duit 25 and completing the automatic shut-off.
10 pockets. Thus, there is in' eiîect one solid stream To reopen valves 3 and 28, the hand control valve
through closure valve 3 instead of three separate 2 is closed which relieves the pressure on the
ones from the spaces between segments 34.
valves 3 and 2d and permitsv them to be lifted
The internal nozzle t is constricted by the
bevel form of the~valve 3 as explained above and
its discharge side is flared to direct the fluid
stream over and without touching the annular
recess 'l before hitting the wall of spray control
tube t at points fr0. The discharge side of the
tube Ei is also constricted by a converging wall
20 to eiîect a good fluid discharge. Two air ports
3B are formed between the inside of the outer
nozzle i and the outside of the spray control tube
ii, see Fig. III. These ports 38 lead from the end
of the outer nozzle i to the annular space l
between the spray control tube 5 and the internal
nozzle Ei. The function of these air ports 3d is
that of breathers which induce the '?luidistream
discharged froml the internal nozzle 5 to follow
its natural course over the annular recess l with
30 out filling up the clearance space between the
stream and the -spray control tube 6 at its inner
end. Dotted lines in Fig. I indicate the normal
course of the iluid stream from inner nozzle 5.
From the above it will be seen that the flow of
35 liquid through the outer nozzle i is restricted
at the oonstricted portion of the internal nozzle
t, consequently forcing the liquid through by
pressure. The lower or outer end of the internal
nozzle t is tapered allowing the liquid to spread
40 and to that degree guiding the spread of the flow
to contact the spray control tube t at points till
creating an air chamber around the annular
recess ‘l’ that has ports 33 to allow the how of
liquid its natural breathing of air as it spreads.
As the liquid flows through the internal nozzle
ii it is also ilowing through the conduit 25 into a
pressure chamber ¿il of the cylinder d, out
through the conduit it in the valve stem il! and
the valve 3, continuing through the adjustment
50 element il into the center of the main ilow of
As the pressure increases or decreases in the
vouter nozzle I the ñow of liquid through the
internal nozzle 5 and through the adjustment
55 element Il also increases or’decreases with the
pressure. It is to be noted that ythe conduit in
element l'l is of a smaller cross sectional area
than that of the conduit i6 and hence this ad
justment element I1 is effective as a small nozzle
at the end of conduit i6. Now as the flow of
liquid increases through the >adjustment element
i'l the flow of liquid that encircles the element
Il increases, increasing the pull of the liquid
exhaust of the pressure chamber 4| out through
65 the conduit IB.
This creates a more uniform
pressure in> the pressure chamber lll, thus creat
ing a Wider range of operating pressures of the
automatic shut-olf nozzle than exists in the
pump installations now in use.
The automatic shut-011’ ltakes place when the
liquid in the container being ñlled _reaches the
discharge end of outer nozzle` I closing oil' the
air ports 38 from the atmosphere which cuts
oii" the air that is being breathed in by the ilow
75 of liquid spreading as it ilows out of the internal
from their respective seats il and 3i) by the
pressure of the spring i9 to their normal posi
The adjustment element i7 is held by a press ,
fit which can be moved to extend out of the valve
t to a variety of lengths, which counteracts the
pressure of the valve spring by the ñow of liquid
contacting the surface oi’ the sides of the adjust 20
ment element il from the angle of the flow at
that point. This creates an adjustment Iof the
sensitivity of the automatic valve by the amount
of the surface of the element il' exposed to the
While I have described this preferred embodi
ment of my invention in detail, it is obvious to
one skilled in the art that numerous changes
might be made and such modiñcations are
deemed to be within the spirit of the invention 30
as hereinafter claimed.
Having thus described my invention, î claim:
1. The combination of an outer nozzle. a closure
valve within said nozzle, a closure valve stem, a
conduit formed in said valve and valve stem
longitudinally thereof, a pressure means urging
said valve open, a closing piston attached to the
end of said valve stern, an operating cylinder in
which said piston operates, said cylinder having
an inlet port at the supply end of said cylinder, di)
a control valve closing said inlet port when said
closure valve is in the closed position, an internal
nozzle into which said >closure valve opens, a
spray control tube positioned at the discharge
end of said internal nozzle and extending to sub
stantially the end of said outer nozzle, and an 45
air duct leading from the end of said »outer
nozzle to a point between said inner nozzle and
said spray control tube.
2. The invention of claim l wherein the oper- a
ating cylinder is supported within said outer 50
nozzle by radially projecting portions having dis
.charge ports formed in the ends of said radially _
projecting portions,lsaid discharge ports having
conduits leading to the spaces between said
radially projecting portions.
3. The invention of claim 1 wherein the closure
valve stem has formed therein a conduit con
necting said operating cylinder with the longi
tudinally extending conduit in said valve stem.
4. The invention of claim 1 wherein an adjust- '
ment member is positioned at the discharge end
of said conduit formed longitudinallyin said
closure valve and valve stem, said adjustment
member having capacity for adjustment longi
tudinally of said valve stem.
5. The invention oi.' claim l wherein said in
ternal nozzle and said spray control tube are
separated from each other by an annular recess.
6. l'I'he invention offc'laim 1 wherein said con
trol valve is of the sliding type and has a depend 70
ing stem connected to the valve piston and which
rests on said closure valve stem vfollowing the
movement thereof.
'7. In combination, an outer nozzle, a closure
valve within said nozzle, a pressure means fore-_ ’ sure from said closing piston, when said closure
lng said valve open to allow ?uidvsdischarse past
valve is closed.
said valve, a closing piston within said nozzle and
normally exposed to the iluid pressure in said
8. The invention of claim 7 wherein the ex
haust _duct has an adjustable projecting nozzle
5 nozzle, an exhaust duct leading through said
closure valve and discharging centrally into vthe
element attached toits lower end, the cross- -
sectional area of said nozzle being smaller than
stream of liquidflowlng past said >closure valvel ,that of said exhaust ductÍ
` ` and a control valve for cutting ol! said iluid pres-
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