U.S. patent number 3,867,090 [Application Number 05/301,244] was granted by the patent office on 1975-02-18 for refillable gas cigarette lighter.
This patent grant is currently assigned to Flamagas, S.A.. Invention is credited to Ricardo Aguirre Gili.
United States Patent |
3,867,090 |
Gili |
February 18, 1975 |
Refillable gas cigarette lighter
Abstract
A gas operated cigarette lighter having a tubeshaped body of
molded plastic that also serves as the liquid fuel reservoir. The
top of the body is closed, but carries a valve for the release of
gas and a pocket in which a complete and autonomous
spark-producing, gas igniting apparatus is housed. The
spark-producing apparatus can be easily removed to replace its
pyrophoric flint. The other end of the body is closed with a
stopper-like air-tight seal which is equipped with an automatic
closing valve through which the fuel is injected. This seal or
stopper is fastened in such a way to the open end of the
tube-shaped body that the union is practically leak proof. A
specially designed lever, swivel-mounted in the head of the
lighter, is used to open and close the valve which controls the
release of gas, and is under constant pressure from a laminated
spring which urges said lever and valve to the position at which
the gas release is closed. BACKGROUND OF THE INVENTION
Non-refillable gas lighters are known. They include a tube-shaped
closed body, which receives liquid fuel that is converted to a
gaseous state when it is released. The fuel is released through a
valve that is installed in the upper closed end of said body. The
valve is next to a knurled wheel, which strikes a pyrophoric flint
and produces sparks to ignite the gasified fuel as it is released.
In one form of these lighters, once the fuel and/or flint has been
exhausted, a lighter is no longer useable. It lacks an inlet valve
through which the fuel reservoir may be refilled. The flint cannot
be replaced since it is permanently installed in a blind pocket
located inside the fuel reservoir. There is no way to gain access
to that pocket. The only way to replace the flint is by removing
the spindle on which the striking knurl spins. But, this is
difficult since the ends of the spindle are usually riveted. If the
broadened rivet parts are removed, the agents which support the
spindle deteriorate, rendering the entire lighter useless. Another
form of these lighters is organized around its fuel reservoir and
is generally tube-shaped and made of a transparent or translucent,
preferably plastic material. The lighter is equipped with a refill
valve in the closed bottom through which the fuel reservoir may be
refilled. At the top of the lighter are a gas release valve and the
mechanical devices which permit adjustment of that valve. The
transparency of the reservoir permits continuous viewing of the
fuel which remains and permits timely refilling through the refill
valve. These lighters also have a stationary ignition device
mounted on a tubular rod with a closed lower end. This rod is
nonremovably fastened at the upper end of the reservoir and extends
down inside same. An expanding spring is installed in said rod, and
on top of this is positioned a relatively long pyrophoric flint.
Both of these are fastened to the knurled wheel which strikes the
flint. This wheel is permanently suspended from a clamped and
riveted spindle that is hung between two integral supports which
project out vertically from the top of the reservoir. It is also
not possible to replace the flint in these lighters. DESCRIPTION OF
THE INVENTION The present invention provides a liquid fueled, gas
emitting lighter without the disadvantages and limitations of prior
art lighters. The lighter of the invention is relatively
inexpensive and permits both replacement of the pyrophoric flint
and refilling of the fuel reservoir. The lighter includes a hollow,
projecting, tapering wedge-shaped, thin width ridge which projects
out from the main body and makes the lighter easier to handle. The
ridge protects the lever that controls the gas release valve, since
it covers the extended end of same, and prevents chance opening of
the gas release valve when, e.g., the lighter is carried in a
pocket. A relatively strong elastic device, like a leaf or
laminated spring, places constant pressure on the lever which
controls the gas release valve, tending to hold it closed and in
place, thus preventing chance gas release. Since the leaf spring
automatically closes the release valve, that valve does not need a
return spring, normally required by such valves. These springs, due
to their small size, are relatively weak, and therefore cannot
guarantee a good closure. The autonomous ignition device, including
a pyrophoric flint and striking knurl, is fitted into the reservoir
by simple insertion, and it may be easily removed by pulling it
with the fingers in order to replace the flint. The mounting of the
knurled wheel on this device has also been specially designed to
provide for simple assembly and disassembly. The traditional
processes which the ends of the spindle are riveted or the spindle
itself is machined and one of the ends threaded have been done away
with. The pyrophoric flint and the spring which works it are
installed through a lateral opening in the tube-shaped lighter
body. Mounting the flint and spring is a quick and easy operation.
The screw which is normally inserted axially to hold the spring in
place and provide the pressure which same places on the flint is
not used in this device. The closure over the open bottom of the
body and reservoir of the lighter seals the reservoir against
leakage, and is equipped with a valve which allows for repeated
injection of fuel into the reservoir. The close union between this
closure piece and the body of the lighter is achieved by means of a
special welding process which assures complete solidarization of
both parts, and therefore a practically leakproof closure. The
lighter of the invention is essentially made up of the following
parts: a. A main hollow molded body, around which the lighter is
built, and which also serves as a reservoir for the liquid fuel. b.
Automatic sealing valve, through which the liquid fuel is injected
into the reservoir. c. Valve for the controlled release of fuel,
duly converted into its gaseous state for combustion. d. Improved
lever for operation of the valve which controls the release of gas
necessary for combustion. e. Leaf spring which puts constant
pressure on the lever mentioned in d. above to automatically return
the gas release valve to the closed position. f. Autonomous
ignition mechanism which can be mounted and dismounted in the body
of the lighter by simple insertion. g. Special system for
installation of the knurled wheel which strikes the pyrophoric
flint. h. Stopper-like piece which provides for a practically
air-tight seal at the bottom of the deposit, which piece is united
to the main body of the lighter by means of a special welding
process. i. Case which protects all of the devices placed in the
head of the main body. These are essentially the most relevant
details of the invention. The lighter also has an optional
tubeshaped case or sheath for the top of the lighter with open ends
and a pair of aligned notches which are located above the lateral
ridge of the main body. In the upper edge there is a rim which is
turned inward. The inside is smooth, and at the front there is a
groove which holds the knob which regulates the length of the
flame. Now that the invention as a whole has been described, other
details and features of same will be clarified in the following
description of the accompanying drawings. The detailed illustrated
embodiment is an example of one possible way that the invention can
be produced.
Inventors: |
Gili; Ricardo Aguirre
(Barcelona, ES) |
Assignee: |
Flamagas, S.A. (Barcelona,
ES)
|
Family
ID: |
8349549 |
Appl.
No.: |
05/301,244 |
Filed: |
October 26, 1972 |
Foreign Application Priority Data
Current U.S.
Class: |
431/277;
431/254 |
Current CPC
Class: |
F23Q
2/162 (20130101) |
Current International
Class: |
F23Q
2/00 (20060101); F23Q 2/16 (20060101); F23q
001/02 () |
Field of
Search: |
;431/254,276,277,344,130,131,142,143,150 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: O'Dea; William F.
Assistant Examiner: Joyce; Harold
Attorney, Agent or Firm: Ostrolenk, Faber, Gerb &
Soffen
Claims
1. A refillable gas lighter, comprising:
a hollow main body;
said body supporting the following elements of which the lighter is
comprised:
two spaced apart upstanding rises extending above and supported on
said main body; each said rise having a respective vertical edge,
and said rises being shaped and oriented such that said vertical
edges face in the same direction as a lever extending out of said
body; in each said rise is defined a pocket in the form of an open
sided notch extending into said rise from its said vertical edge;
said notches being of a width to permit swiveling of lever
appendages held therein;
a reservoir in said body for holding fuel to be released; a fuel
release valve in said body communicating with said reservoir and
being operable to control release of fuel; said release valve
including a labyrinth through which the fuel passes and which
causes gasification of the fuel;
said lever engaging said release valve and extending out of said
body; said lever extending between and passing between said rises;
from opposite sides of said lever project said appendages which
extend into and across said rise pockets and said appendages and
said pockets being cooperatively shaped to enable said lever to be
rocked around said appendages in said pockets; said release valve
being shiftable by rocking of said lever to open said release
valve;
a return spring engaging said lever and applying force thereto for
returning said lever and said release valve to the closed
position;
an ignition mechanism in said body including means which enables
said ignition mechanism to be readily mounted in said body; a
pyrophoric flint held in said ignition mechanism; a knurled wheel
for striking said flint; means for mounting said knurled wheel in
said ignition mechanism;
means in said body for establishing a leak-proof closing of said
reservoir
2. A lighter in accordance with claim 1, wherein said lever has an
opening passing vertically thereacross and said opening being of
dimensions to permit said ignition mechanism to extend therethrough
without obstructing rocking motion of said lever; said ignition
mechanism extending through
3. A lighter in accordance with claim 1, wherein each of said
pocket is in the shape of a notch tapering narrower away from said
vertical edge into
4. A lighter in accordance with claim 1, wherein said release valve
operating lever is comprised of a flat plate having an end with a
notch therein; said notch being fitted over said release valve;
said spring being positioned and being of a type to normally bias
said lever to move said release valve to a closed position; said
lever also including a rim which extends down and holds said spring
in position beneath said lever.
5. A lighter in accordance with claim 1, wherein said rises further
include means which guide a cap over the upper end of said hollow
main body; and a cap for said main body which is placed over the
upper end thereof and which is carried by openings in said rises
which openings are provided therefor;
said body upper end being narrowed about its perimeter for a short
distance down from said upper end, and said body having a
peripheral ridge at the end of said narrowed portion, with said
narrowed portion and said ridge
6. A lighter in accordance with claim 1, wherein a pocket is
provided in said main body for holding said valve; said valve being
installed in said pocket; means are provided for supporting said
valve in its said pocket; said release valve comprising a body
defining a thin cylindrical opening running the length of a hollow
valve piece; said valve piece having a concavely shaped lower end
and defining a wide, concavely shaped rim about the lower end of
said opening in said hollow piece; a groove means provided in said
piece for receiving said lever, whereby engagement of said lever in
said groove means enables movement of said lever to alternately
raise and lower said release valve; sealing means within said
pocket for sealing said release valve, permitting movement thereof
under
7. A lighter in accordance with claim 6, wherein said valve piece
includes a burner device at the upper end thereof, through which
the fuel exits from said hollow piece;
passages communicating between said hollow opening of said valve
piece and the exterior of said valve piece; said valve pocket
including a recess about the perimeter of said valve piece, between
the upper end of said valve piece and the seal about said valve
piece, providing space for passage of gas moving toward said burner
device; said groove in said valve piece cooperating with the
pivoting movement of said lever for causing said release valve to
move axially through said pocket;
a resilient gasket installed in said pocket beneath said valve
lower end and positioned such that said valve lower end presses
against said gasket
8. A lighter in accordance with claim 6, wherein there is a wick
leading from said reservoir to said opening at the lower end of
said gas release valve pocket; within said pocket beneath said
hollow piece opening lower end is positioned a conical element
which is topped by a rounded bonnet; the opening into said pocket
communicates with the lower end of said conical element and there
are diametrical openings through said conical element which direct
the incoming fuel outwardly around the exterior of said conical
elements and then cause the fuel to pass around the exterior of
said conical element toward said hollow opening of said valve
piece; the space that is around said conical element, beneath said
valve piece and is so positioned that the fuel passes therethrough
on the way to said hollow piece and is filled with a foam material,
so that the liquid fuel which rises through this area is gasified
and the turbulence of the gas is
9. A refillable gas lighter, comprising:
a hollow main body;
said body supporting the following elements of which the lighter is
comprised:
a reservoir in said body for holding fuel to be released; a fuel
release valve in said body communicating with said reservoir and
being operable to control release of fuel; said release valve
including a labyrinth through which the fuel passes and which
causes gasification of the fuel;
a lever engaging said release valve and extending out of said body;
said lever being operable for opening said release valve;
a return spring engaging said lever and applying force thereto for
returning said lever and the engaged said release valve to the
closed position;
an ignition mechanism in said body including means which enables
said mechanism to be readily mounted in said main body; a
pyrophoric flint held in said ignition mechanism; a knurled wheel
for striking said flint; means for mounting said knurled wheel in
said ignition mechanism;
means in said body for establishing a leak-proof closing of said
reservoir in said body;
said body includes two cylindrical pockets within it extending down
from said body upper end; the first of said pockets being closed at
all but its upper end which is opened for receiving said ignition
mechanism and for holding same in place; said first pocket having a
longitudinal groove therein, and said ignition mechanism having a
corresponding longitudinal rib on its exterior for meshing with
said groove in said first pocket, thereby to properly align said
ignition mechanism;
the second said pocket gradually decreases in diameter, through
stepped gradations, toward the bottom of said main body; an opening
is provided in the lower end of said second pocket for
communicating with said reservoir; said gas release valve being
positioned in said second pocket and communicating with said
opening therein, whereby the fuel can pass from said reservoir
through said second pocket opening and through said valve.
10. A lighter including: a hollow main body; in said body a
reservoir for holding liquid fuel, means for releasing the fuel and
means for igniting the fuel; a stopper to seal the reservoir; and a
refill valve communicating through said stopper with said reservoir
and including an automatic seal, provided for refilling said
reservoir;
said stopper having a tube shaped projection which extends into
said body; an interior opening through said projection through
which said refill valve passes; said opening including a pocket of
greater width than the opening therethrough, and having a surface
facing out of said body which is perpendicular to and extends away
from said opening through said stopper; a support washer for said
refill valve being installed in said stopper and resting in said
pocket and against said perpendicular surface; said opening through
said stopper narrowing annularly near the outside of said body and
out of said narrowed portion of said opening protrudes a
cylindrical portion of said refill valve; a gasket in said opening
through said stopper above said narrowed portion of said
opening;
said support washer in the said pocket within said stopper having a
cylindrical body with an axial opening extending therethrough for
receiving said refill valve; said washer having an exterior profile
corresponding to that of said pocket in said tube shaped
projection; said washer including a narrowing at the inside end
thereof to act as a guide for said refill valve; a rim on the side
of said washer facing toward the exterior of said lighter, which
said rim forms a collar for receiving a
11. A lighter having a refill valve in accordance with claim 10,
wherein said coil spring presses upon said valve body to normally
close said valve; said refill valve including a valve body having
an upper part further into said stopper which includes a plurality
of longitudinal grooves about the periphery of said valve body;
beneath the groove portion of said valve body is a wider
cylindrical portion acting as a guide for said valve spring; a base
portion on said valve body including an annular rim upon which said
spring presses, whereby said compression spring at the one end
presses against said washer and at the other end against said valve
body; said gasket being beneath said rim of said valve body for
sealing off gas released due to pressure exerted by said spring,
said gasket also surrounding a rod at the end of said valve body,
which rod extends out of said hollow main body of said lighter and
which is contacted and made to move in said valve body when refill
is contemplated.
12. A gas lighter in accordance with claim 1, wherein said stopper
comprises a base which fills a correspondingly sized opening in
said main body, and also includes a central portion which extends
vertically into said main body, which central portion is surrounded
by a tube shaped collar; said collar includes a flap which holds a
washer in place in said stopper; said washer including an opening
through which said refill valve
13. A gas lighter in accordance with claim 12, wherein said stopper
has an annular rim around its bottom edge; said annular rim having
an upper side which turns radially inwardly with respect to said
stopper and said stopper then having a narrower periphery above
said annular rim; said main body surrounding said narrowed annular
portion of said stopper, and including a lower edge which rests
against said annular rim; a gap between said body and said stoppers
is filled with material which has been amalgamated during a welding
process by which these pieces have been
14. A refillable gas lighter, comprising:
a hollow main body;
said body supporting the following elements of which the lighter is
comprised:
a reservoir in said body for holding fuel to be released; a fuel
release valve in said body communicating with said reservoir and
being operable to control release of fuel; said release valve
including a labyrinth through which the fuel passes and which
causes gasification of the fuel;
said lever engaging said release valve and extending out of said
body; said lever being operable for opening said release valve;
a return spring engaging said lever and applying force thereto for
returning said lever and the engaged said release valve to the
closed position;
said release valve having a closed position which is determined by
operation of said lever; said spring exerting a constant force
against said lever to normally bias it to the gas release valve
closed position;
an ignition mechanism in said body including means which enables
said mechanism to be readily mounted in said main body; a pyrophric
flint held in said ignition mechanism; a knurled wheel for striking
said flint; means for mounting said knurled wheel in said ignition
mechanism;
means in said body for establishing a leak-proof closing of said
reservoir in said body;
said spring being comprised of a metallic lamella, bent into a
V-shape; at the vertex of the bend, a notch is provided in said
spring to create a free space for said ignition mechanism to pass
through said spring to its desired position; said main body having
a top; said spring being positioned between said main body top and
said lever, with a respective arm of said spring resting against
each of these elements, with the upper wing of said spring being
held by a flap-like rim hanging down from said lever and the lower
wing thereof including a locking portion which extends
15. A refillable gas lighter, comprising:
a hollow main body;
said body supporting the following elements of which the lighter is
comprised:
a reservoir in said body for holding fuel to be released; a fuel
release valve in said body communicating with said reservoir and
being operable to control release of fuel; said release valve
including a labyrinth through which the fuel passes and which
causes gasification of the fuel;
said lever engaging said release valve and extending out of said
body; said lever being operable for opening said release valve;
a return spring engaging said lever and applying force thereto for
returning said lever and the engaged said release valve to the
closed position;
a refill valve communicating between the exterior of said body and
said reservoir, said refill valve being activatable to permit
refilling of said reservoir;
an ignition mechanism in said body including means which enables
said mechanism to be readily mounted in said main body; a
pyrophoric flint held in said ignition mechanism; a knurled wheel
for striking said flint; means for mounting said knurled wheel in
said ignition mechanism;
means in said body for establishing a leak-proof closing of said
reservoir in said body;
said main body includes an enclosed pocket; said ignition mechanism
being mounted in said pocket;
said ignition mechanism comprises a tube shaped piece, having an
open end from which access is obtained to parallel upstanding
extensions between said extensions and from them hang a freely
swiveling knurled wheel; a flint is positioned beneath said knurled
wheel for being struck thereby to produce sparks; said extensions
from said ignition mechanism each include a vertical edge having an
angular opening extending therefrom, which angular openings
gradually narrow away from their respective said vertical edges and
terminate in respective central pockets; said knurled wheel
including a spindle extending out therefrom, and the spindle is
inserted through said extension angular openings into said central
pockets; said central pockets being large enough to permit said
spindle and said knurled wheel to rotate; said ignition mechanism
tube shaped portion having an opening sufficiently large for
receiving said flint and a compression spring which is positioned
in said tube shaped element beneath the flint for applying pressure
to it to move said flint against said knurled wheel; said tube
shaped piece being closed at one end against which said spring
presses; said tube shaped piece of said ignition mechanism
including a longitudinal external guide rib; said guide pocket of
said main body including an aligned longitudinal slot for receiving
said longitudinal guide rib of said ignition mechanism.
Description
IN THE DRAWINGS:
FIG. 1 is a side view of the main body in which its cylindrical
shape can be appreciated, and the outside ridge which is attached
to it and used to hold the laminated spring in place can be seen in
profile.
FIG. 2 is an elevational view of the back part of the main lighter
body, in which the ridge is seen face on.
FIG. 3 is a front elevational view of the main body and
reservoir.
FIG. 4 is a top view of said body.
FIG. 5 is an elevated diametral cross-section in which the profile
and positioning of all the details of the main body and reservoir
can be seen.
FIG. 6 shows a bottom and FIG. 6a a cross-sectional view of the
reservoir end cap.
FIG. 7 is an elevation view, with a vertical cross-section of the
lighter.
FIG. 8 is an elevation view of the assembled lighter, showing the
protruding wedge-shaped ridge which projects laterally from the
main body.
FIG. 9 is a view similar to that of FIG. 8 which shows the above
protruding ridge face-on.
FIG. 10 represents the lever which operates the gas release valve
in perspective.
FIG. 11 shows a profile, FIG. 11a a side, and FIG. 11b a developed
view of the laminated spring which puts constant pressure on the
lever described in FIG. 10.
FIG. 12 shows the ignition device in elevation, FIG. 12a shows it
in cross-section, and FIG. 12b gives a view of the lower end of
same.
FIG. 13 is an elevation cross-section view at a diameter of the
bottom stopper which closes the fuel reservoir.
FIG. 14 is an enlarged detail which gives a more complete
description of the welding process for mounting the reservoir
stopper-bottom.
DETAILED DESCRIPTION OF THE DRAWINGS
MAIN BODY
The lighter main body is a molded hollow cylindrically shaped tube
1, preferably made of synthetic plastic material. Body 1 defines
interior reservoir 2 for holding liquid fuel. The body may be
translucent or transparent so that the amount of fuel left in the
reservoir can be seen.
The top 3 of the body 1 is closed, and its bottom 4 is open. The
bottom is sealed with a special stopper (FIG. 6) which is attached
to the body 1 by a special welding process.
The top 3 has a pair of tubular pockets 5 and 6, which hang down
inside reservoir 2. Pocket 5 is open at the top 7 to the outside,
and closed at the bottom 8 and is designed to hold and position a
special autonomous lighting device (FIGS. 7 and 12). This device
can be easily removed to replace the pyrophoric flint when
needed.
Pocket 5 has a longitudinal groove 9 along its interior wall which
corresponds to a shoulder or rib 9a, located on the lighting
device. The device slides into the pocket and is directed to shoot
sparks toward the gas release opening in order to ignite the
fuel.
Main body 1 has a hollow downwardly inwardly tapering ridge 10
which projects radially outward and extends from the top 3 of the
body 1 almost to the bottom 4. This ridge is designed to:
a. support and hold the lower end of the laminated spring which
puts constant pressure to raise the lever which closes the gas
release valve.
b. protect the lever which operates the gas release valve, since it
is of the same size and shape, and limit the size of the opening
during gas release. It also prevents chance emptying of the
reservoir due to the lever being caught against something in the
user's pocket, and gives the lighter an overall better
appearance.
c. provide a more efficient means of handling the lighter, making
it easier and more convenient to use.
d. reinforce the walls of the pocket which houses the cylindrical
body of the lighting device, because the alternating application
and release of pressure in the lighting process works on it. It
would also allow, if necessary, for increasing the size of said
pocket if the circumstances so advised, since this positioning of
the body would account for the differences without changing the
outside measurements nor the shape of the lighter.
e. provide space for other features, small complementary suspension
devices, such as a magnetic inset, for example.
Parallel to pocket 5 is second pocket 6 also integrally formed
inside reservoir 2. The diameter of pocket 6 successively decreases
through smaller chambers 11, 12, and 13. It has a small hole 14 in
the bottom which leads to the reservoir. The upper edge of this
pocket where it is connected to the top 3 of body 1, forms a
perimeter bevel edge 15. The gas release valve is housed in pocket
6.
Main body 1 has two parallel, facing homologous rises 16, 17 above
the top 3 of the body and perpendicular to it. The rises are
positioned on the edge of top 3 and form with it an extension such
that the external sides 18, 19 have the same curved form, and the
internal sides 20, 21 are straight, and parallel to one another,
and the separation between them is equal to the width of the
outside of hollow ridge 10, to the width of the laminated spring,
and to the width of the lighting mechanisms. Each rise is shaped in
the form of a right quadrangle. One vertical side 22 of each rise
near ridge 10 has a respective angular notch 23, 24 whose upper
edge 25 is horizontal and whose lower edge 26 is slanted. On the
inside this forms a gradation 27 whose length is equal to the
height, the larger side acting as reinforcement.
Underneath the vertices which form the notches and on the outside
of the rises, there are the same number of circular recesses 28
into which extend the similarly positioned ribs 28a of the cap or
sheath 29 that covers the head of the lighter. On the outside, the
lighter may be optionally equipped with vertical grooves which run
over the circular recess 28 and hold the metallic cap or sheath 29
of the lighter in place. These grooves serve as guides for the
inside pivots or ribs 28a of cap 29 when it is mounted on the body
and direct these pivots toward recesses 28 in the body where they
are held. Given the smaller diameter at the bottom of said groove,
the cap can be installed without forcing. The upper rim 30 of cap
29 rests on the orthogonal seams 31 which have said
quadrangular-shaped extensions 16, 17 at the top 3.
The flap of said sheath 29 is set and fixed into place in the
section 31a where the perimeter of the body 1 decreases slightly,
just below the top 3.
The open bottom 4 of main body 1 is closed off with a stopper 32
which is solidly attached to it, and which bears the refill valve;
the inside diameter of said body 1 increases at the bottom, which
means that the wall is narrower at that point.
FUEL RELEASE VALVE
The lighter is designed to increase the distance traveled by the
gas fuel before being released through the release valve, assuring
that when the gas reaches the outside it is in optimum condition
for burning.
The lighter also prevents turbulence when the fuel is released,
thus providing for greater stability of the flame.
The lighter gas release valve is located in cylindrical pocket 6.
It includes a screw-on cap 34 which has a recess 35 approximately
half-way up its perimeter. The upper edge 36 of recess 35 and base
37 of cap 34 are bevel-edged so that when cap 34 is mounted on the
lighter, it is forced past a circular rib in pocket 6. The upper
edge of this pocket rib is also beveled, so that when the valve is
pressed downward, the bevel edges slide against one another and
distort the material of the cap until cap 34 is positioned with the
pocket rib in recess 35 of the cap.
Cap 34 is internally screw threaded to hold valve body 38 which
consists of a cylindrical tube open at one end and closed at the
other, and in the center of which there is a small hole 39 which is
circled on the inside by a wide rim 40 on which a cylindrical
elastic piece 41 is placed and either left to lie loosely or held
in position by means of an upper cylindrical axial extension 42
which extends into the piston or burner device 43 from underneath,
forming the valve with which this hole is opened and closed.
On the outside of the upper edge it has a spread 38a which is
vertically grooved around its entire perimeter, in which grooves a
flame-regulating bodkin 44 is placed. This bodkin consists of a
semi-circular piece whose ends are folded towards the center and in
the center of which is perpendicular arm 45 so that it may be
handled more easily.
There are three peripheral recesses in the valve body 38; one 46
which separates the grooved zone from the screw-cut zone another 47
which extends from the latter downwards to the bottom, close to
which the third 48 is located. In recess 48 is a resilient O-ring
49 which puts pressure on body 38. This O-ring rests on the inside
wall of the intermediate gradation 12 of pocket 6, sealing it
air-tight to prevent gas leaks but allowing said piece to
pivot.
When it is raised or lowered on the screw threads it provides for
release of larger or smaller amounts of gas.
The coupling of O-ring 49 to recess 48 of the valve body 38 means
that when the latter is removed, it pulls the coupling with it
which can be replaced for a new one if necessary. Finally, the
angle edge of the lower base is bevel-edged.
A cylindrical piston or burner device 43 is fitted into the smooth
inside of the valve body 38 but in such a way that it can move up
and down or rotate. This device rests on the resilient piece 41
which closes the hole 39 in said body. Piston 43 has an axial hole
51 which opens at both ends and which branches off in various
radial arms 52 which radially open to the outside in an area where
the diameter of piston 43 is smaller. Hole 51 decreases in three
gradations from bottom to top, the widest area being the bottom in
which the resilient seal 41 is held in place.
At the upper end of piston 43, its edge 53 is bevelled along the
perimeter. Further down there is section recess 54 and a
parallelogram which encircles it, in which the lever bodkin 55 is
located. This bodkin moves the piston or burner device 43
vertically, and allows for the release of gas.
Downward closing pressure on device 43 is provided by a laminated
leaf spring 65 located below lever 55, which forces the latter to
maintain a constant closing pressure by compressing the resilient
seal 41 against the lower end of gas release hole 39 of the valve
body 43.
At the narrow bottom of the pocket holding the valve is placed
piece 66. This piece has a cylindrical shape and is short in
length, and its bottom 67 is extended in the shape of a diametrally
grooved cone frustrum 68, the ends of which double back
orthogonally and continue upward until they reach the top 69. In
the center of the top there is a knob 70, also conical in shape and
extended into a spherical bonet, where the central groove of the
bottom 50 of the valve body 38 is set and fitted into place.
Between the body and the special piece there is an element 71 which
limits the amount of gas released and which consists of a porous
foam, more specifically, it is a polyuretane disc which is
compressed between the two, such that the disc pressure is produced
exclusively in its center.
The gas rises in liquid form through a wick 72 which is held in
hole 14 leading from reservoir 2 to the cavity where the valve is
housed, and through the special cylindrical piece 66, which presses
the top against the bottom of the cavity.
REFILL VALVE
The refill valve is located in the stopper which seals the bottom
of the fuel reservoir 2. Stopper 32 has in its center a tube-shaped
projection 73 in which the refill valve is installed. Its upper
inside edge is beveled and below it there is a perimeter recess 75
whose upper angle edge 76 is slanted. The lower edge forms a
perpendicular gradation which acts as a check for a special piece
77 which penetrates the walls of said recess by pressure, and is
thus held in place by a bond.
Special piece 77 consists of a thick washer or support whose
external appearance is the reverse of the one described for the
frame; it has a hole which is larger at the top and at the bottom
becomes a rim or flap 78 rather like a collar.
The spring 79 which keeps the gas opening closed rests on the
bottom of this piece around the collar.
The body of the valve consists of a cylindrical piece 80 which has
various gradations and ribs, in accordance with their function. The
upper part 81 is grooved by longitudinal, parallel and
equidistantly spaced grooves in order to allow the gas which enters
through the tube-shaped collar 73 to flow in through these grooves
and the support-washer into the reservoir 2.
The upper end of this upper part 81 penetrates into and is guided
in its vertical upward and downward movements by the opening in the
center of washer 77.
Then the diameter of piece 80 is enlarged to nearly the size of the
inside diameter of the spring 79, acting as a guide for same and
thus preventing the deformations which could come about as a result
of compression, due to the force transferred to the other end of
the spring by means of an annular rim 82 on which it rests.
Collar 73 has, close to its lower edge, a narrowing of smooth sides
and sharp angles, which leaves a center hole, through which a rod
84 protrudes. The valve is extended to this rod, which has various
parallel planes 85 making the transfer of gas from the refill
bottle to the valve easier. A sealing gasket 86 is placed around
the rod 84 and compressed against the upper side of the gradation
83 of said collar and the lower edge of the valve rim 82.
The coil spring 79 is permanently compressed and the sealing gasket
86 is under constant pressure, which keeps the gas opening normally
closed.
All of the pieces are installed through the upper hole, the
support-washer 77 sealing the entire system off. When pressure is
brought to bear on the protruding rod 84, it raises up, frees the
sealing gasket 86, and the gas flows through the space between said
rod 84 and the tube-shaped collar, into the internal cavity of the
latter and through the grooves in the upper part of the valve body
to the fuel reservoir 2.
LEVER FOR OPERATION OF THE GAS RELEASE VALVE
This lever is made up of a flat stamped piece 55, preferably
rectangular in shape, from whose longest edges aligned appendages
56 and 57 project in opposite directions. Appendages 56 and 57
constitute points of support for movements of the lever to
establish the open and closed positions for the gas release valve
43, and act as checks to limit the upward movement of lever 55.
A pair of axial, homologous and reciprocally parallel extensions or
rods 16, 17 project upward from the upper part of the body of the
lighter for installation of lever 55. Said lever is suspended
between the two extensions. Rods 16, 17 each have an angular notch
23, 24 in which the appendages 56, 57 of the lever 55 are placed.
Lever 55 is installed in such a way that it can rock between the
open and closed positions, thus controlling the release of gas.
One of the shorter edges of lever 55 is narrowed, and at its center
has a notch 60 which delimits two homologous arms 58, 59 which are
fitted into a groove 54 in the tip 43 of the gas release valve.
When lever 55 is put under pressure, it rocks, resting its
appendages 56, 57 on the angular bottoms of their respective
positions 23, 24 and causes valve 43 to raise up and allow gas to
flow out.
Lever 55 has been improved in the following important manner: the
edges of the operating sides are folded downward, both side and
back, forming retention and centering rims 63, 64 around the upper
wing of the laminated spring 65. This puts constant pressure on the
lower part of the lever, thus returning the valve 43 to the closed
position.
The lever 55 has a central opening 61 with a notch 61a designed to
allow the lighting device described below to pass through.
Lever 55 is under pressure from laminated spring 65, which keeps it
in the closed position at all times. In order to release the gas,
pressure must be brought to bear on lever 55 in order to overcome
the resistance of said laminated spring.
Spring 65 consists of a folded over V-shaped elastic lamella, and
is positioned between the top 3 of the body 1 of the lighter and
the bottom of the opening lever 55 for the gas release valve 43.
The spring has a notch 65a open in front, that is at its vertex,
and has a rim 65b diverted downward at an angle from the lower
wing, which extends into the opening in the upper edge of the wedge
shaped ridge 10 of the main body, holding the spring in place, and
preventing it from moving upward. The upper wing of spring 65 rests
against the bottom of lever 55 which controls the gas release, and
is centered or retained by the peripheral rim or flap 63, 64, which
borders the operating sides of lever 55.
LIGHTING MECHANISM
The lighting mechanism is an autonomous device. It is built around
a cylindrical tube 87 one of whose ends is closed. One part of this
tube has been cut away 88 from the lower end, by means of two
perpendicular cuts, one of them longitudinal and the other through
the diameter. A semi-cylindrical cavity is produced, which is an
extension of the center opening 89 of tube 87. The lower end of
this cavity is closed by a semi-circular divider 90.
The opposite end of tube 87 is integral with a U-shaped bodkin with
sharp angles centered above it, whose eyes 91, 92 are grooved.
Pyrophoric flint 93 is inserted through the lower open part 88 of
tube 87 as is the spring 94 which holds the flint against the
knurled striking wheel 95. Spring 94 is under pressure until it is
completely inserted into the tube cavity resting its end on the
bottom semi-circular divider 90 which closes it off.
This system provides for complete independence between the ignition
mechanism and the other elements of the lighter, and avoids
complicated machining work.
The knurled wheel has a special construction for which reason the
arms 91, 92 of the bodkin which supports the ignition device from
above, each have grooves 96, 97, which each converge inwardly
toward the center of the bodkin, FIG. 12. This center area is
enlarged, to a circle, thus forming the same number of small
gradations. The pivots 98, 99 which form the spindle of knurled
wheel 95 pass through grooves 96, 97 and are squeezed inward and
extend by pressure exerted by the converging grooves until the
pivots 98, 99, become coupled to the circular enlargement,
preventing said pivots from sliding out of place.
With this mounting and retaining system, the use of riveted
spindles or pins, screws, etc., is eliminated and therefore much
machining work is avoided, since the assembly is considerably
simpler.
WELDING PROCESS
The bottom 4 of fuel reservoir 2 is sealed by welded on stopper 32
which forms a practically leakproof closure. The stopper has a
tube-shaped vertical projection 73 which passes through the center
of the reservoir. The inside upper edge 74 of projection 73 is
countersunk, and forms interior gradations 100, 101 with the smooth
wall. Near the opposite end there is a divider 83 having an opening
through which the rod 84 of the refill valve 82 slides. Rod 84
continues at the original diameter down to the base of the
lighter.
Stopper 32 is encircled by an annular crown 102, 103 extending
perpendicular to the top. Around the periphery of the stopper there
is a peripheral gradation 104 which has a slanted section groove
105 in its upper edge, the upper base of which is directed inward,
thus forming a sharp angle.
The sealing of stopper 32 which closes the open end 4 of the main
body 1 must be practically leakproof inasmuch as the hollow main
body forms the reservoir 2 which is to hold the highly volatile
liquid fuel.
In view of these requirements the invention includes a special
process to establish a close union between the closure piece 32 and
the hollow main body 1. This process can also be used to
effectively weld together pieces of thermoplastic materials, where
the parts to be welded are interlinkable circular sections.
Up to now, pieces with the basic features mentioned have been
welded by friction. This welding has been performed without
difficulty when walls of a certain thickness are to be joined. It
is possible to eliminate the burrs from the outside surface of the
assembly by arranging that the pieces which are to be joined,
instead of just touching at the top, have a reciprocal coupling.
This is achieved either by means of a mutual rise in the walls
themselves, or by means of a gradated rib placed in one of them,
which protrudes perimetrically from the whole, forming an annular
thickness.
Nevertheless, when relatively thin pieces are to be welded by
friction, difficulties arise, due to the fact that although it is
possible to join them at the head, the burrs on the inside and
outside are unavoidable, and this is not acceptable for certain
kinds of welding. Also, the process of adding a gradated rim to one
of the pieces is not desirable in many cases, because it must
protrude out from the assembly perimetrically.
The welding method proposed herein is designed to overcome these
disadvantages when the pieces to be welded have a small thickness.
This method offers the advantage that no burrs are produced on the
outside, and of course it does not require protruding gradated
rims. In short, it makes possible the union of pieces with annular
coupling zones, without any irregularities on the outside.
One of the pieces to be joined is formed with an annular recess in
its inside wall. In the other piece a slanted section and circular
groove are located on the exterior periphery exactly at the bottom
of the rise or circular recess of the first piece. With this, due
to the movement of the moving piece, the area to be welded is
heated to such an extent that the plastic material acquires a
certain degree of amalgamation so that part of the material itself
thus fused tends to seep out from between the pieces. Nevertheless,
give the peculiar formation of the pieces, the material fused in
movement is retained in the slanted groove of one of the pieces and
also fills the annular recess of the other as the material
accumulates. All of this is carried out on the inside and
diametrically, and no burrs are formed on the outside, since the
fused material cannot escape to the outside.
The stopper 32 which closes the bottom 4 of fuel reservoir 2 must
be integrally united to it, since the pressure of the extremely
volatile liquid so requires. Stopper 32 has two concentric tube
shaped portions 73, 102 and 103 united by the base. The center one
73 is the highest and its upper blunt edge 74 is turned inward,
forming perimeter gradations 100, 101 where the special piece 77 is
positioned and held in place. On the inside it has a narrowing 83
through which the rod 84 slides, and which at the same time acts as
a base for the resilient washer 86 which seals the groove formed.
This tube-shaped piece 73 extends downward forming a circular rim
106 joined to another concentric one 107. This latter is formed in
the same manner by the external tube portion 102, 103 by means of
radial rises 108 which reinforce the base and provide for the
fastening necessary for welding.
On the outside the piece 32 has a peripheral rim 104, with the
surface 105 slanted inward. In this rise it checks and holds the
tube shaped body of the lighter 1 in place, leaving an angular
cavity on the inside 109 and a pocket in the upper part formed by
the curved edge of the tube-shaped portion, designed to hold and be
filled by the welding burrs.
One difficulty which is presented is the small thickness of the
walls to be welded and therefore the elimination of the burrs which
are formed.
In order to hide these burrs, the body 1 is fitted with an annular
inside recess 33, and the other piece 32 with an also annular
groove 105. Piece 32 is made to spin by any mechanism in the inside
of the main body 1 and the heating due to friction causes a
softening of the parts; once they reach a certain degree of fusion
they fill the spaces or grooves with the excess material, making
for a stronger bond between the two pieces.
CAP OR SHEATH
A tube-shaped cap or sheath 29 is provided in the upper part of the
lighter to cover the mechanisms in its head. Both ends of this
sheath are open, the bottom smooth, and the top circled by a rim 30
which rests on the edges 31, 31a.
At the front, sheath 29 has a groove from which the flame
regulation lever 45 protrudes. In the two lateral sides there are
two pockets 28a which penetrate into their homologous parts 28 of
the body 1. Posteriorly, it has two windows. The upper one 110
exposes the knurled wheel 95, with its toothed wheels 111, 112 for
improving its operation. The lower one 113 is separated from the
upper one by the extensions 114 and 115 which are joined at the
center. From lower window 113 the lever 55, which controls the gas
release, valve is operated.
It will be easily understood, from the above drawings and
description, that the present design provides for a simple and
effective construction, which can be very easily put into practice,
and which assures relatively low manufacturing costs.
It is emphasized that the article which makes up the present
invention is designed to be able to easily incorporate any changes
of detail which the circumstances and practice may advise, whenever
the variations which are introduced do not change, alter or modify
the essential nature of the invention described.
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