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Патент USA US2133355

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211.18, 1938.
G M, LUBOW . ? -
2,133,355
OVERFLOW SAFETY DEVIGE, v
Original Filed Jan. 2, 1936
INVENTOR.
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. W
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ÊBY
áEvR E M. Lußow
W
A'ITORNEY.
Paaa??d Oct. 18,11938
2,l33,355
UNITED srATEs I
ovaarnow ssra'rr navrcs
H. Lubow, New York; N. Y., assignor of
one-half to Joseph H. Feinberg, Flushing, N. Y.
Application January 2, 1936r, Sel'lallNo.v 57,178
Benewed Septemberl, 1938
8' 0mm. (ci. 13748)
This lnvention relates to new and useful im
provements in an over?ow safety device.
invention, comprises an inverted substantially
The invention has for anv object the construc
having a bottom outlet Na and a sideinlet I?b.
The bottom outlet I'Ua is adapted to be con
tion of a device as mentioned which is lcapable
5 of preventing the over?ow\-of liquids in tanks
during the ?lling of theøtanks. 'Ifhe _invention
is applicable to all types of liquids such as fuel
on, gasonneminz, etc. Filmai-limit is intended
for fuel oil and gasoline tanks.
10
"
A feature of the` invention resides in the fact
L-shaped body ll for the passage of fluid and
nected upon the top of a fuel tank `||, prefer
ably by a threaded connection. The side inlet
illb is adapted to be connected with a supply pipe
for the liquid, also preferably by a threaded con
nection since the parts may then be quickly asso
ciated with
each'other.
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that whenv the device is vapplied to a gasoline
Within and integral with the 'body ll there
tank the customary dump'cover is'eliminated. It ' is a Vertical' cylindrical portion ltc which is
has generally been recognized that the ldump formed with an open top licc and a closed bot
covers are an extreme hazard in gasoline tanks
15 and numerous unsuccessful attempts have been
made to overcome this hazard.
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More speci?cally, the invention contemplates
the provision in an overiiow safety device of an
inverted L-shaped body for the passage of iiuid
20 which is adapted to be connected at the bottom
outlet end with a -fuel tank and at the side _
inlet end with a supply of fluid. and said body to
have anýintemal Vertical cylindrical portion open
at the top and closed at the bottom. and at the
25 side connecting with said side inlet whereby a
valve may be arranged within the cylindrical
tom. `This cylindrical portion llc at the side
connects with the side inlet ilib.
' 15/
A Vertical stem i2l slidably engages through
the closed bottom of the cylindrical portion llic
and at the bottom end is attached on a ?oat il.
At the top end the stem. |2 connects with a disc- ?
shaped Valve il which is adapted to engage upon 20
a _shoulder surrounding the'opening iücc for the
1311W of closing the opening.
.The ?oat i! preferably should b`e a hollow
light metal air tight container. The passage |2'
in the closed bottom end of the cylindrical por 25
tion ilo 'for the stem i! is considerably of a
' portion and connected with- a ?oat in the Lta`nk~ larger siae than the stem so as to provide a
and arranged so as to close against the open top vdi'ain for the fuel. as hereinafter further de-'
of the cylindrical portion when the liquid within
30 the tank rises to a pre-determined amount,
Still further the invention` proposes an ar
scribed.
An arrangement which has been found _
to be satisfactory is one in which the stem i! 30
is ?íß" and the opening l2'. one'quarter inch.
rangement whereby the ?oat is held compara
tively stationary when the liquid within the tank
Since the stem i! is relatively loose in the open
ing if' an arrangement is provided for support
is low so that the ?oat does not rattle and unduly ing the ?oat IJ in its lowered position to pre
vent rattling. More speci?cally. a wire cage i'
š
35 wear out parts of the device.
Another object of the invention is the construc
is attached upon the tank ii and encases the
~ tion of a device as described whichis simple and
?oat ii. This wire cage has a bottom portion
durable and which may be manufactured and ilo upon .which a soft pad l'l isl mounted. In
sold at a reasonable cost.
the lowered position of the valve' ll the ?oat
For further comprehension of the invention. II rests upon the pod l'l. Several springs ll are 40
and of the objects and advantages the'rcof, ref
attached on the inside of the cylindrical portion
erence will be had to the following description iOc and are adapted to assist in holding the ?oat
and accompanying'drawing. and to the appended in the lowered position.
Each-of the springs ll has a top converging
claims in which the various novel features of the
f portion ilo which connects with a horizontal
45 invention are more particularly set forth. `
In the accompanying drawing forming a ma
shoulden llb, which in turn connects with a
ter'ial part of this disclosurez- „f
4bottom portion ilc attached upon the bottom
Figi. 1 is a Vertical sectional view of a device wall of the cylindrical portion lIc. The con
constructed according to this invention _and ap-' struction is such that the shoulders Ilb of the
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springs normally hold the valve in its lowered 60
50 plied to a fuel tank. _
IFig. 2 is a horizontal sectionai view taken on
the line 2-2 of Fig. 1.
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position, but when the liquidlevel in the tank
Iises a pre-determined amount, the ?oat exerts
su?lcient force to flex the springs so that the
valve il is free and may rise. When the liquid
The overiiow safety device. according to' this . in the tank falls the valve lt comes down upon
Flg. 3 is a horizontal sectional view. taken on
the line 3-3 of Fig. 1.
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2
2,188,855
'the converging portions |8a and spreads these
portions so as to pass there-beneath to assume
4 the complete down position of the valve. The
valve and ?oat, because of a mechanical advan
tage, may readily spread the springs 18 when
CN
moving downwards.
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A vent pipe 2|! is attached along the side wall
of the correlated parts without departing from
the spirit or the scope of the appended claims.
Having thus described my invention, what I
claim as new, and desireto secure by United
States Letters Patent is:
v1. An over?ow safety device, comprising an in
verted L-shaped body for the passage of ?uid and
of the body III and extends from the bottom out- ' adapted to be connected at the bottom outlet end
let end lila to the top of the body and through a with a fuel tank and at the side inlet end with
10 boss lßd. A ball check for the release of air pres
a supply of fuel, and having an internal Vertical 10
sure is arranged on the boss l?d. This ball check cylindrical portion open at the top and closed
comprises a ball 2| resting upon the top of the
at the bottom and at the side connected with said
' opening in the boss | 0b and releasably held in this
side inlet end, a Vertical stem slidably engaging
through said closed bottom of said cylindrical
position by a spring 22 which is tensioned by an
adjustment screw 23.v This adjustment screw is
supported upon a housing 24 mounted upon the
boss llld and encases the ball 2|. Vent openings
25 are formed in the sides of the housing 24.
The bottom of the cylindrical portion llc is
formed with a recess 26 within which the valve
ll normally is disposed. This recess is arranged
below the entrance level of the liquid through' the
inlet ylllb. Consequently, the pressure of the
passing liquid tends to maintain the valve ll in
its open position. It is impossible for the enter
ing liquid `to exert any upward pressure on the
- bottom face of the valve.
The operation of the device is as follows: A
supply of liquid'is connected with the side inlet
30 lllb. The liquid passes to the cylindrical portion
portion, a ?oat for extending into said tank and 15
connected with the bottom of said stem, a valve
on thetop of said stem and within said cylin
drical portion and in a raised position adapted
to close the said open top of said cylindrical
portion, and means for releasably holding said 20
valve in the open position, comprising several
springs mounted upon the interior wall of said
Vertical vcylindrical portion and engaging said
valve.
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2. An over?ow safety device, comprisíng an in
verted L-shaped body for the passage of ?uid _and
adapted to be connected at the bottom outlet end
with a fuel. tank and at the side inlet end with
a supply of fuel, and having an internal Vertical
cylindrical portion open at the top and closed at
the bottom and at the side connected with said
around down through the -body III and is ?nally side'inlet end, a Vertical stem slidably engaging
discharged into the tank || through the outlet through said closed bottom of said cylindrical por
lila. When the level of the liquid in the tank || 'tion, a ?oat for extending into said tank and
connected with the bottom of said stem, a valve 35
V reaches the position A-A the ^?oat starts to lift.
When the liquid level in the tank reaches the on the top of said stem and within said cylindrical
elevation B-B the ?oat has lifted a suñicient portion and in a raised position adapted to close
the said open top of said cylindrical portion, and
amount so that the valve ll is substantially mld
means for releasably holding said valve in the
way between its original position and the open
open position, comprisíng several springs mounted 40
40 ing Hicc. The incoming liquid then exerts pres
sure beneath the valve ll and' forces thevalve upon the interior wall of said Vertical cylin
closed upon the seat of the opening Illcc. The drical portion and engaging said valve, and hav
closed position' of the valve is indicated by the dot ing converging top portions connecting with hor
izontal shoulder portions beneath which the valve
and dash lines in Flg.' 1.
may engage.
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The
fact
that
the
valve
H
has
closed
will
be
im
45
3. An over?ow safety device, comprising an in
mediately noted by the operator in that the pres- _
sure in the supply line immediately rises. The verted L-shaped body for the passage of1 ?uid
4 llic and up through the opening Illcc, and then
and adapted to be connected at the bottomout
operator then stops the supply of liquid. The li
quid within 'the line and in the cylindrical portion let end with a fuel tank and at th'e side inlet end
HI then drains through the opening |2' into the with asupply of fuel, and having an internal ver
50 tank ||`. After all the liquid
has drained from' tical cylindrical portion open at the top and 50
v
the lines the line is disconnected from the inlet
IOb. As the liquid flows into the tank | | the air
from the tank may pass out through the vent pipe
20.-
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While I have illustrated and described my in
vention with some degree of particularity, I realize
that' in practice various alterations therein may
be made. I therefore reserve the right and privi
lege of changing the form of the details of con
'co struction or otherwise altering the arrangement
closed at the bottom and at the side connected
with said'side inlet end, a Vertical stem slidably
engaging through said closed bottom of said cyl
indrical portion, a ?oat for extending into said
tank and connected with the bottom of said stem. 55
a valve on .the top of said stem and within said
cylindrical portion and in a raised position
adapted to close the said open top of said cylin
drical portion, and a guard surrounding said ?oat.
.
I
GEORGE M. LUBOW.
60
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