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Патент USA US3044515

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July 17, 1962
Filed Aug. 7, 1961
United States
'I atent Q P 1C6
Patented July 17, 1962
chamber b at the lower part of the cylinder 1 and the
inner chamber 0 of the reservoir a, even when the mov
able stern member 5 is moved axially. A coil spring 10
is arranged between the outer surface of the washer
member 9 and a shoulder portion 11 of the movable stem
Taisho lketani, 589 Nogata-cho l-chome,
Nakano-ku, Tokyo, Japan
member 5, and serves the purpose to push the movable
Filed Aug. 7, 1961, Ser. No. 129,730
Claims priority, application Japan June 19, 1961
1 Claim. (Cl. 141-294)
stem member 5 (outwardly. A ?ange 12 is formed'in
tegrally with the movable stem member 5 at the upper
part thereof. The ?ange 12 is in engagement at its outer
surface with the inner surface of the ?ange 3 when the
movable stem member 5 is forced outwardly and acts‘
to limit the outward movement of the movable stem
member 5. A ?tting cylinder 13 is slidably ?tted to the
.The present invention relates to an improvement in an
injection valve for use in a lique?ed gas lighter.
In’ the prior constructions of a lique?ed gas lighter,
when a fuel gas reservoir for the lique?ed gas lighter is
?lled with liquid fuel, there is the danger of detonating
movable stem member 5 and has an outer diameter to
the fuel gas due to the change of the ambient tempera
15 leave a ‘discharge space 14 between the inner wall of they
ture, and consequently after a given quantity of fuel has
chamber b and the outer surface of the ?tting cylinder
13. The ?tting cylinder 13 is positioned such to be
therefrom, so as to leave a de?nite space within the
forced upwardly by means of a coil spring 16, which is
reservoir consisting of a tank. It is one object of the
arranged between a shoulder portion 15‘ formed at the
present invention to provide an injection valve, wherein 20 lower part of the ?tting ‘cylinder 13 and the upper surface
in order to reduce the quantity of the fuel of over?ow
of the washer member 9. A resilient packing 17 is
and to leave a desired space in the tank, a discharge open
wrapped in a cavity 18 at the upper part of the ?tting
ing is provided, so as to effect simultaneously the opening
cylinder 13. The packing 17 engages tightly the outer
been ?lled in the valve mechanism, the fuel ?ows over
and closing of the injection opening.
cylindrical face of the movable stem member 5 and serves
Heretofore, a valve mechanism of such type is con 25 the purpose to seal tightly the ?tting cylinder 13 to the
.structed in such manner, that an injection opening is
movable stem member 5. At the same time, when the
opened after an over?ow or discharge opening has been
?tting cylinder 13 is forced out, an annular seat 19 ex
opened, and also after the injection opening has been
tending inwardly on the inner face of the ?ange 3 to
closed, the over?ow opening is closed. In the known
wards ‘the packing 17 bites into the resilient packing 17,
structures upon the ?lling up of the fuel, loss of the fuel 30 so as to ‘seal the passage 20 communicating with the open '
cannot be eliminated and also a space left in the tank,
air through the chamber b and‘ the support bore 6. A
caused by the difference in time between the opening and
longitudinal passage 21 is disposed centrally in the mov
closing of the over?ow opening and injection opening,
able stem member 5. 'The passage 21 is open at its top
has been formed, and consequently it has been very
and terminates into the upper end of a tubular needle
di?icult to ensure the leaving of a de?nite space in the 35 like part 22 and is closed at its lower end. Ayradial
injection opening23, which communicates with the longi
‘It is, therefore, another object of the present inven
tudinal passage 21 is disposed at a place where the mov
tion to provide an injection valvepwhich removes the
able stem member 5 is surrounded normally by the pack
ing 8. When the movable stem member 5 is forced
defects inherent in the injection valve in the prior lique?ed
gas lighter.
With these and other objects in view, which will be
come apparent in the following detailed description, the
present invention will be clearly understood in connec
tion with the accompanying drawing, in which:
FIGURE 1 is a side view partly in section of a lique?ed 45
gas lighter;
FIGS. 2, 3 and 4 are enlarged axial sections of an in
jection valve, respectively, showing a state of the opening
and closing thereof.
downwardly, the packing 17 is compressed by the inner
surface of the ?ange 12 and the sealing effect between
the annular seat 19 and the resilient packing 17 is lifted,
the radial injection passage 23 is located in such a posi
tion that it escapes from the packing 8 and is just opposite
the bore 7.
The operation of the injection valve in the lique?ed
gas lighter designed in accordance with the present in
vention is as follows:
When the cylinder 1 of the lighter is mounted and the
Referring now to the drawing, a cylinder 1 is mounted 50 tubular needle like part 22 of the stem member 5‘ is
on a reservoir a of a gas lighter. A base plate ‘is mount
inserted into an injection opening of a supplementary
ed on the bottom of the cylinder 1, and a ?ange 3 is
?lling tank (not shown) and is pressed downwardly by
formed on the upper inner circumference of the cylinder
the latter, lique?ed fuel passes through the longitudinal
1, spaced apart from the outer wall of the reservoir, so
central passage 21 up to the radial injection passage 23.
as to form a chamber b at the lower part of the cylinder
However, as long as the injection passage 23 is sealed
1. A discharge opening 4 is formed in ‘the side wall
of the chamber b and is in communication with an inner
chamber 0 of the reservoir a and is positioned spaced
apart from the base plate 2 at the lower part of the
?ange 3.
off bythe packing 8, the fuel cannot pass through the
If the pressing down of the mov
able stem member 5 is continued, the latter is moved
, injection passage 23.
through the cylinder 1 into the container against the action
60 of the spring 10.
When the operation of ‘the stem mem- .
A movable stem member 5 is inserted in the cylinder
ber 5 is effected, the ?tting cylinder 13 remains in its
1. The upper part of the movable stem member 5
outermostposition by the action of the separate spring
passes through a support hole 6 formed centrally in
16, and consequently the ?tting cylinder 13 does not
the ?ange 3. The lower end of the movable stem mem
move at ?rst. However, when the movable stem'mem
ber 5 passes through a bore 7 formed centrally in the 65 ber 5 is further lowered so as to press the upper sur
base plate 2. Accordingly, the movable stern member
face of the resilient packing 17 by the under surface of
5 can move freely inwardly and outwardly from the cyl
the ?ange 12, the under surface of the ?ange 12 presses
inder 1. A packing 8 is wrapped by a washer member
against the packing 17 and thereby the ?tting cylinder
9 and arranged on the base plate 2 at the bottom of the
13 is moved inwardly to join the continued inward move- .
cylinder 1. The packing .8 serves the purpose to engage 70 ment of the stem member 5 and thus to release the an
sealingly the periphery of the lower part of the movable
nular seat 19 which was biting into the packing 17.‘
member 5 and also to provide a sealing between the
Thus, the discharge space 14 is connected with the open
On the one hand, when
cylinder adapted to be secured to a container of said
the annular seat 19 is spaced apart from the packing 17,
the injection passage 23 is axially spaced apart from the
packing 8 to be disposed opposite the bore 7, and conse
a stern member axially movable in said cylinder and
air through the passage 29.
' having an axial injection passage communicating
witha radial injection passage terminating at the
periphery of said stern ‘member in, order to inject
fuel through said axial and radial passages, said axial
passage being closed at its inner end except to said
quently lique?ed fuel starts to inject into the‘ reservoir 11, ,
When this position is maintained, lique?ed fuel continues
to enter into the, reservoir 11 from the injection passage
23.- On the other hand, vaporized gas in the reservior
is discharged from the discharge opening 4 through the.
passage 20. When the liquid surface of the fuel injected 10
radial passage,
said cylinder having a discharge opening through its
outer side wall portion, and having an inner ?ange
from the injection passage 23v reaches the height of the
outwardly spaced apart from said'discharge opening,
discharge opening 4, this fuel over?ows above the cyl
said ?ange having an opening slightly larger than the
inder 1 from the discharge opening 4 through the pas
outer diameter of vsaid stem member to form a
passage therebetween,
sage 20, and it can be seen that the fuel has been ?lled
up to the discharge opening 4.
If now the supplementary ?lling tank is removed, the
movable stem member '5 moves outwardly again by the
action of the coil spring 10 and the injection passage 23
assumes a position opposite the packing 8 so it ceases
a ?rst packing ring surrounding the outer portion of
said stem member in slidable sealing engagement
therewith and engaging with its outer facesaid ?ange
of said cylinder, so that said discharge opening is
any injection of the fuel therefrom. At the same time, 20
'closed from the ambient atmosphere in the outer
the ?tting cylinder 13 is lifted ‘together with the ?ange
most inoperative position of said packing ring and
12 of the movable stern member 5 by the action of the
of said stem member,
a second packing ring in sealing engagement with the
coil spring 16, and, therefore, by a reverse course as
above described, the injection passage 23 is entirely closed
V innermost portion of said cylinder and said stem
and at the same time the passage 20 is also closed.
and closing said radial injection passage of said stem
Consequently, when the injection of the fuel is stopped,
member in the inoperative position of the latter, and
a ?rst spring disposed between a shoulder portion of
After the passage 26* has been closed, the discharge
said stem member and said second packing ring and
opening 4 is connected with the chamber b, and lique?ed’ '
fuel which did not over?ow is discharged to ?ll up the 30V urging said stem member into its outermost position,
the over?ow of the fuel is also stopped.
chamber b’.
said stem having a ?ange disposed outwardly of said
As above described, in accordance with the present
invention, as the injection passage 23 is feeding fuel and
?rstpac‘king ring between said ?ange of said cylinder
the passage 29 is connected to the open air, the discharge
opening 4 and the passage 23 are opened and closed 35
simultaneously, upon the ?lling up of fuel into the reser
packing ring when the stem is in an outermost
and said ?rst packing’ ring and spaced from said
a second spring between the ?rst and second packing
voir, an unavailing evaporation of the fuel, when the
ring biasing said ?rst packing ring into engagement
fuel remains in the reservoir, is avoided, and the quantity
of the fuei which‘over?ows, when the ?lling up of the
fuel has been ?nished,,is very small, and also a space
with said inner ?ange of said cylinder, so that upon
performance of- an inward stroke by said stem mem
ber said discharge opening is connected with the
of a de?nite volume can be safely maintained.
While I have disclosed one embodiment of the present
invention, it is to be understood that this embodiment is
given by example only and not in a limiting sense, the
scope of the present invention being determined by'the
objects and the claim.
I claim:
An injection valve for a. gas-fueled lighter comprising
ambient atmosphere and said radial injection passage
of said stem member feeds fuel into said container.
References Cited in the ?le of this patent
I 1.127.374
France ___________ __'___ Aug. 5, 1956
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