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Патент USA US2129801

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Sept. 13, 1938.
.1. M. WALLAQE
DISPENSING GUN
Filed March 15, 1957
2,129,801
Patented Sept. 13, 1938
2,129,801
UNITED STATES PATENT OFFiCE
2,129,801
DISPENSING GUN
John M. Wallace, Oakville, Ontario, Canada
Application March 15, '1937. Serial No. 131,045
In Canada March 19, 1936
2 Claims. (Cl. 221-74)
It has been proposed to treat the inside of in
In the plunger 4 is formed a passage 22, which
her tubes of pneumatic tires with a semi-plastic is controlled by a valve 23, normally held in closed
or viscous material having the character of
position by a spring 24 secured to the plunger.
maintaining said condition and tending to seal The stem 25 of the valve extends through the pas
5 the tube against air leaks due to the rubber be
sage 22 and extends a distance below the lower
coming porous or through punctures.
side of the plunger for a purpose which will here
It is important that the tubes be supplied with after appear‘.
the treating material in properly measured quan
The device is used as follows. The plunger is
tities, and it is the object of my invention to de
moved to its upper position, the bottom 4 re
0 vise apparatus for positively and accurately dis» moved, and a measured quantity of the treating 10
pensing the material to the tubes, and particu
material placed in the body. The bottom 4 is
larly to devise apparatus which may be operated then replaced, and the nozzle 26 secured to the
by air pressure from air supply systems such as valve of the tube to be treated. The air supply
15 used for blowing up tires.
connection is then connected with the inlet 2|
I attain my object by means of the construo—' and upon the air entering above the plunger, the 15
tions hereinafter described and illustrated in the latter is moved in the body to expel the treating
accompanying drawing in which
material. As the plunger reaches the bottom of
Fig. 1 is a longitudinal section through the the body, the stem 25 of the valve engages the
apparatus;
20
Fig. 2 an end elevation of the same; and
Fig. 3 a cross section on the line 2—2 in Fig. 1.
In the drawing like numerals of reference in
dicate corresponding parts in the di?erent ?g
ures.
25
l is a cylindrical casing or body having a head
2 at one end and a bottom 3 at the other end.
Slidable within the body is a plunger 4, the rod
5 of which extends through a hole in the head 2
and is provided with a cross bar 6 or other suit
30 able hand grip. A boss 1 is formed on the head
surrounding the hole for the plunger rod, which
boss is formed with an internal seat to receive
packing 8, which may be compressed by means of
a nut 9 threaded on the boss.
35
The plunger 4 comprises a pair of metal plates
l0 ‘and H between which is clamped a disk I2
of rubber or other suitable material. The parts
of the plunger are held together by screws or
bolts l3. One of the plates, preferably the upper
40 one I D, is formed with an annular rib II]8 to posi
tion the disk I2.
Interposed between the end of the body and
the bottom is a Washer or disk M of suitable pack
ing material, to prevent leakage.
45
The top 2 is formed at opposite sides with
pairs of lugs l5 between which are pivoted rods
IS, the free ends of which are threaded and are
received between corresponding pairs of lugs I‘!
on the bottom 3.
Wing or thumb nuts it are
50 provided on the rods I6 which may be screwed up
The same procedure will take place for each
tire tube to be treated.
-
inserting treating material in pneumatic tire
tubes, it will be apparent that it may be used for
Various other purposes.
What I claim as my invention is:—
1. Ina dispensing gun, the combination of a
hollow body having an air inlet in one end and
a discharge outlet in its other end; a plunger
movable in said body; a pull rod connected with
the plunger centrally thereof and extending
through the other end of the body, said plunger
40
having an air passage therethrough; a normally
seated valve controlling said passage; a stem on
said valve extending through said passage and
of a length to engage the end of the body to un
seat the valve just as the plunger reaches the 45
end of its stroke.
2. In a dispensing gun, the combination of a
hollow body having an air inlet in one end and
a discharge outlet in its other end; a plunger
movable in said body; a pull rod connected with 50
the plunger centrally thereof and extending
through the other end of the body, said plunger
which is connected one end of a hose 20, the other
end of which is provided with a suitable nozzle
having an air passage therethrough; a valve con
As it is desired, as stated in the preamble of
the speci?cation to utilize air pressure to operate
the plunger, I provide in the head 2 an air inlet
2| to which may be connected a compressed air
supply such as used for in?ating tires.
'
From the above description, it will be seen that
I have devised a dispensing gun which will per 2.5
mit the operation of its plunger by air pressure
and provided with convenient means for relieving
air pressure and clearing the connections when
the contents have been emptied from the body.
While the gun has been devised primarily for 30
against the lugs I‘! to hold the bottom in place.
The bottom 3 is provided with an outlet ill to
55 26 adapted to be ?tted to a tire tube valve.
6
bottom 4 thus unseating the valve, thus relieving
air pressure in the body and helping to expel 20
any treating material left in the hose.
trolling said passage, spring means normally
tending to hold said valve seated; a stem on said 55
valve extending through said passage and of a
length to engage the end of the body to unseat
the valve just as the plunger reaches the end
of its stroke.
J. M. WALLACE.
60
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