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Патент USA US2109870

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‘ March‘ 1, 1-938.
F. G’. THWAITS ' I
2,109,870
EMERGENCY VALVE
Filed Dec; 20, 1935
mV NmR
E.
ATTORNEY§ .
2,109,870
Patented Mar. 1, 1938
UNITED STATES PATENT OFFICE
2,109,870
EMERGENCY VALVE
Frederick G. Thwaits, Wauwatosa, Wis., assignor
to The Heil 00., Milwaukee, Wis., a corpora
tion of Wisconsin
Application December 20, 1935, Serial No. 55,426
6 Claims. (Cl. 137-21)
The. present invention relates in general to is the provision of improved valve actuating
improvements in the art of dispensing liquid, mechanism for enabling operation of emergency
and relates more speci?cally to improvements in
the construction and operation of emergency
5 valves for normally permitting withdrawal of in
?ammable liquid from storage compartments
while preventing escape of the liquid in case of
?re.
Generally de?ned, an object of the present
10 invention is to provide an improved valve struc
ture which is simple and compact in construc
tion, and which is moreover highly eiiective in
operation.
In order to- diminish ?re hazard, it is neces
15 sary under the laws of most localities, to pro
vide safety appliances for preventing delivery of
in?ammable liquids from storage receptacles in
case a ?re is started near such receptacles. Many
different types of‘ so-called emergency valves
20 have heretofore been proposed and used for this
purpose, and especially in connection with oil
and gasoline truck tanks having one or more
liquid storage compartments therein. , These
emergency valves are adapted to be maintained
25 open during normal dispensation of liquid from
the compartments with which they are associ
ated, and are capable of being quickly closed in
cases of emergency. The prior devices of this
kind are either too complicated in structure, or
30 inef?cient in operation, and in most cases are
susceptible to undesirable leakage, thus making
all of the prior emergency valve assemblages
relativelyobjectionable.
It is therefore a more speci?c object of the
35 present invention to provide an improved emer
gency valve especially applicable to truck tanks
or the like, which obviates the objectionable fea
tures of the prior valve assemblages and which
effectively performs its intended function.
Another speci?c object of the present inven
40
tion is the provision of an extremely simple
and compact emergency valve structure, which
can be readily applied to storage tanks and which
is relatively leak proof.
A further object of the invention is to provide
45
a new and useful emergency valve assemblage
adapted to be attached to the lower portion of
elongated tanks, so as to permit actuation of
the valve from either side of the tank, and also
50 through openings at the top of the receptacle.
Still another speci?c object of the invention is
to provide improved seals or packlngs for an
emergency valve structure, whereby danger of
leakage is minimized at all times.
An additional speci?c object of the invention
55
i
valves or the like from a distant station.
A further object of the present invention is
to provide an improved durable valve assemblage, 5
which can be manufactured at moderate cost,
and which may moreover be readily installed
or
removed.
.
‘
These and other objects and advantages of the
present invention will be apparent from the fol
lowing detailed description.
A clear conception of embodiments of the sever
al features constituting the present improve
ment, and of the mode of constructing and of
manipulating emergency valves built in accord
ance with the present invention, may be had by
referring to the drawing accompanying and
forming a part of this speci?cation wherein like
reference characters designate the same‘ or simi
lar parts in the various views.
20
,Fig. 1 is a central vertical section through one
of the improved emergency valves showing the
same applied to the lower portion of a storage
tank, the valve being closed;
Fig. 2 is a side elevation of the emergency
valve, a portion of the assemblage having been
broken away; and
Fig. 3 is a fragmentary transverse horizontal
sectional view, taken along the line 3-3 of Fig. 1.
While the improved features constituting the
present invention are especially advantageous
when applied to emergency valves for liquid
transporting and dispensing truck tanks, it is
not desired to unnecessarily restrict the scope
or possible use of the improvements, by virtue
of limitations or speci?c descriptive terms used
in this speci?cation.
Referring to the drawing, the improved emer
gency valve assemblage shown therein, comprises
in general a main valve casing 6 having an an-
0
nular upper valve seat ‘I and oppositely disposed
and alined liquid conductingv openings 8 formed
in the lower portion thereof; a valve disk 9
con?ned within a valve cap it] carried by a stem 45
Ii, and movable toward and away from the seat
‘I; a helical compression spring l2 embracing the
stem II and coacting with a cover l3 secured to
the casing 6 and with the valve cap ID to ,con
stantly urge the disk 9 toward the seat ‘I; a bell- 50
crank l4 swingably mounted upon a transverse ‘
pivot i5 and having one arm engageable directly
with the lower extremity of the valve stem H;
a reciprocable actuating rod l6 pivotally at
tached to the other arm of the bell-crank M by
a pin H and slidably engaging a bearing member
2
'
2,109,870
I8 secured to the casing 3 between the‘ openings
8; a bellows seal l9 connecting the rod IS with the
bearing member l3; and a valve operating cable
or rod-like element v2ll operatively attached to
the rod IS.
The main valve casing 6 has an integral ?ange
2| near the valve seat 1, adapted for coaction
with a sealing gasket 22, and for attachment to’
a supporting ring 23 by means of studs, lock
10 washers and nuts 24. The ring 23 may be rigidly
secured to the lower portion of a tank 25 by weld
ing or otherwise, and the gasket 22 serves to posi
tively prevent leakage of liquid between the eas
ing ?ange 2| and the ring 23, while the nuts 24
15 permit convenient external attachment or re
moval of the valve unit. The upper integral cage
portion 26 of the valve casing 6, to which the
cover I3 is detachably secured by means of
screws 21, is embraced by an annular screen 28
20 which serves to prevent sediment, from within
the tank 25 from collecting upon the valve seat
1. The lower interior portion of the main cas
ing 6 is provided with a guide 28’ for the valve
stem H; and the upper end of this stem is pro
25 vided with a loop or eye 29, and is slidable in
a central hole in the cover i3. One of the lower
openings 3 of the casing 6 is normally sealed
by a closure plate 30 coacting with a gasket 3|
and detachably secured to the casing by studs
30 and clamping nuts 32; and the other opening 8
communicatesv with a liquid dispensing pipe 33
having an integral ?ange 34 coacting with an
other gasket 3| and detachably secured to the
casing 6 by studs and nuts 35, 36, the latter of
which coacts with the pivot i5. The pipe 33 may
thus be connected to either side of the casing ‘3,
and the closure plate 30 serves to permit conven
ient access to the mechanism within the main
casing without necessitating removal of the liq
uid dispensing pipe.
The valve cap it] is rigidly attached to the
stem i |, and the valve disk 9 is held within the
recess of the cap H] by means of a lower plate
31 and a nut 38 coacting therewith and with
45 screw threads on the stem. The valve stem ||
may be moved longitudinally of its axis to com
press the spring i2 and open the valve, either by
means of a hook or cable applied to the eye 29,
or by actuation of the bell-crank M. The pivot
50 i5 upon which the bell-crank I4 is swingably
supported, is insertible or removable from the ex
terior of the casing 6 as clearly shown in Fig. 3.
This pivot l5 has a reduced end portion snugly
?tting alined bores in the casing 6 and upon
55 which the bell-crank I4 is directly supported,
and also has a threaded medial portion 39 and
an integral ?ange 40 adjacent thereto. The
threaded portion 39 coacts with screw threads in
the casing 6, and the ?ange 4|] coacts with a soft
60 metallic sealing washer 4|, thus positively pre
venting leakage of liquid past the pivot l5, and
the pivot l5 also serves as a stud with which the
nut 36 coacts to clamp either the pipe ?ange 34
or the closure plate 30 to the main casing 8.
65
As previously indicated, the lateral arm of the
bell-crank |4 coacts with the lower extremity
of the stem ||, while the depending arm coacts
with the pin H; and the latter of the bell-crank
arms has a slot 42 with which the pin I? coacts
so as to prevent lateral pressure on the pin due
to angular displacement of the bell-crank l4.
The rod i5 has an-integral ?ange 43 which is
permanently attached to the movable end of the
accordion or bellows seal -|9 to provide a leak
75 proof joint, and the seal i9 is formed of ?exible
metal and has its opposite end secured to the
bearing member l3 and casing.6 by means oi
studs and nuts 44 and sealed by a gasket 45.
While the bellows seal I9 permits free reciproca
tion of the rod l8, it also insures a leak-proof
Joint for this rod, thereby further guarding
against escape of liquid from within the casing
8 except through the pipe 33. The operating
end of the rod I8 is connected to the actuating
element 20 by means of a detachable coupling 10
46, and the element 20 is operable in any conven
ient manner from a remote station and may be
housed within a tubular casing 41 detachably se
cured to an end of the bearing member l8 by
means of a screw 48. Upon release of the screw 15
48, the casing 41 may be withdrawn axially from
the member I8; whereupon the element 20 and
the coupling 43 attached thereto, may be un
screwed irom the rod l6 and subsequently like
wise withdrawn.
20
The normal use and operation of the improved
emergency valve should be clearly apparent from
the foregoing description of the detailed con
struction thereof. When the valve unit has been
properly assembled and applied to a container or 25
tank 25, the valve disk 9 may be ‘pressed into in
timate engagement with the seat ‘I on the cas~
ing ‘6, by the spring i2, as shown in Fig. 1, so as
to cut-off communication between the tank and
the pipe 33; or the disk 9 may be elevated from 30
the seat ‘I to open the valve either by pulling up
wardly on the stem II from above, or by pull
ing on the rod i6 and thereby causing the bell
crank M to push upwardly against the lower end
of the valve stem. Upon release of the opening 35
force exerted against the stem || either from
above or below, the compression spring I 2 will
immediately become e?’ective to close the valve
and will thus positively prevent further passage
of liquid.
—
The improved valve assemblage can obviously
40
be readily attached to or removed from the tank
25 with the aid of the studs and nuts 24, and the
studs and nuts 32, 35, 36, 44 provide for conven
ient access to and removal of all parts of the' 45
mechanism. The gaskets 22, 3|, 45 and the
washer 4| and seal I9 positively prevent undesir
able leakage or escape of liquid from within the
valve casing 6, and the dispensing pipe 33 may
be attached to either side of the main casing 50
without undesirable interference by the valve
actuating mechanism, since this mechanism is
extremely simple and compact and is located
near the lower end of the casing 6 midway be
tween the interchangeably available openmgs 8. 55
From the foregoing description’ it will be ap
parent that the present invention provides an im
proved emergency valve assemblage which is ex
ceedingly simple, compact and durable in con
struction, which is thoroughly sealed against 60
leakage, and which is readily manipulable and
highly ei?cient in operation. The improved de
vice may be applied or removed as a complete
unit, has all parts conveniently accessible for in
spection and adjustment, and is extremely ?ex
ible in assemblage and installation. The inven
65
tion has proven highly successful in actual com
mercial use, especially as applied to truck tanks,
and fully complies with the most stringent safety
70
laws.
It should be understood that it is not desired
to limit the invention to the exact details of con
struction and to the precise mode of operation,
herein shown and described, for various modi? 75
3
2,109,870
cations within the scope of the claims may occur
having mm extending into said chamber mid
to persons skilled in the art.
way between said openings, a closure plate for
- ’
,
, one of said openings, a pipe attached to said cas
_1. Ina valve, a main casing havingaiseat and ing adjacent the other of said openings,‘ a swing- ‘ j
a chamber beneath said seat'provided with an able lever within" said chamber for actuating said
disk through said stem, 9. rod penetrating said
opening, a pipe detachably attached to said cas
ing at ‘said opening, a valve disk cooperable with l_ ‘casing for actuating said lever, a bellows seal
I claim:--
'
-_
_
_
v
I
said seat and‘ having a stem projecting ‘into said located entirely within said chamber and inter
chamber, a lever within said chamber eooperable posed between: said rod and said casing in sub
'10 with said stem, an actuating rod for said lever, stantial alinement with said openings, and a 10
and a pivot for said lever piercing only one wall ' pivotfor said lever removable from the exterior
of said casing and forming means for attaching "of said casing, and penetrating only one wall
said pipe to said casing.
- _
.'
2. In a valve, a main casing having a seat and
15 a chamber beneath said seat provided with an
opening, a pipe detachably attached to said cas
ing at said opening, a valve disk cooperable with
thereof.
‘
5. A valve assemblage comprising, a main cas
ing having a seat and a chamber beneath said
seat provided with an opening, a pipe detachably
attached to said casing at said opening, a valve
said seat and'having a stem projecting into said ' member cooperable with said seat and having an,
chamber,‘ a lever within said chamber cooper; actuating portion extending into said chamber,
20 able with said stem, an actuating rod for said a lever within. said chamber cooperable with said
25
20
-
actuating portion, an actuating rod for said'lever , '
Q 1 ~_, ‘
lever, a pivot for said lever extending exteriorly
of said casing and piercing only one wall there
of, and means coacting with said pivot for at
having a bellows seal disposed entirely within said; -_ '- I‘ '
taching said pipe to said casing.
one wall of said casing and ‘coacting ‘with
\ said‘
_.
.2 1 a
3. In a valve, a casing having a seat and a
chamber beneath said seat provided with an
opening, closure means for said chamber attached
to said casing at said opening, a valve 'disk coop
‘erable with said seat and‘ having an actuating
30' portion extending into said chamber, an‘ actuat
ing lever within said chamber and cooperable
with said actuating'disk portion, a pivot for said
lever extending exteriorly of said casing and
‘ piercing only one wall thereof, means coacting
with said pivot vfor attaching said closure means
to said casing, actuating means‘ for said lever
penetrating said casing, and seals interposed be
tween said pivot and actuating means and said
casing.
-
Y
'
4. In a valve, a casing having a seat and a
chamber provided with ‘opposite alined open
ings. a valve disk cooperable with said seat and
chamber, and a pivot for said lever piercing ‘only, :
pipe to connect said pipe and casing; ’ '
w '
..
6. A valve assemblage comprising, a main cas
ing having a seat and a chamber adjoining said
Q
seat provided with an opening, a pipe communi
cating with said chamber through said opening,
a valve member cooperable with said seat and 30
having an actuating portion extending into said
chamber, a lever pivotally suspended within said
chamber and cooperating with said valve actuat
ing portion, a rigid actuating rod for said lever
slidably associated with said casing, a bellows
seal disposed entirely within said chamber and
‘having its opposite ends secured respectively to
said rod and casing, and a ?exible cable for re
ciprocating said rod to‘sw'lng said lever without
subjecting said bellows to lateral. displacement.
40
Y,
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