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Патент USA US2121924

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June 28, 1938.
H. J; NEwLlN
SPRAYING APPARATUS
Filed May l, 1935
2,121,924
2,121,924`
Patented June 2s, 193s
5 UNITED STATES PATENT>> OFFICE l '
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2,121,924
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SPRAYING APPARATUS
Henry James Newlin, Birmingham,` England
l Application May 1, 1935, Seriall No."19,280
2 Claims.
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(Cl. 299-140.1)
This invention relates to spraying apparatus
for liquidsy or other material, of the type in which
air and a liquid or material to be sprayed are fed
the valve 20 being fixed on a valve spindle 22
which‘is slidably mounted in the valvefsleeve I3 i
aforementioned. The end of this spindle 22 pro
to adischarge nozzle, and the present inventiony jects beyond the abutment nut I5 fixed on the
"5ïlparticularly relates to spraying apparatus set. valve sleeve I3 and the end of the valve spindle is
fitted with a screwed adjustable abutment nut 23.
forth in the specification accompanying my ap
plication for Patent Serial No. 8351 oi 1935.
»The invention has for itsV object a simplified
construction whereby the control trigger or device
lûiìactuates >both the liquid or like control valve and
valve mechanism contro-lling the air feed for ob
taining, at will, either a round spray or a fan
shaped spray.. A further object of `thisinvention
is to `obtain a valve mechanism for controlling the
löllair feed which is not liable to get out of order and
which is readily adjustable.- A further object of
this invention is to enable the air feed for obtain
ing the fan-shaped spray to be adjustable to ob
tain the desired form of fan-shaped spray.
20 , Referring to the drawing:
Figure 1 is a cross sectional elevation of a spray
gun constructed according to this invention, and
Figure 2 is a section on line 2-2 of Figure 1.
According to a convenient embodiment of this
25 invention, the gun comprises a frame I in which
is mounted the liquid spray needle valve 2 coact-y
The conduit I9 passes to and from the conical
Valve seat 24 and the passage of air through the‘
conduit I9 is regulated by a conical valve 25 which
is screw-threaded for engaging a tapped hole in
the frame I. The valve spindle 25 passes through
a packing gland and terminates in a knurled head
2B for adjusting the valve and consequently theV
ñow of air to the air cap for producing the `ian
shaped spray.
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trigger 4 is first moved, the link I6 bears against
the abutment nut on the valve sleeve I3 and
moves the valve II from its seating. Air then
flows through the ñrst air chamber 9 into the
second air chamber IIl and through the conduit I l
to the air cap. ‘ On the further movement of
the trigger 4, the liquid control needle valve 2
is -opened to supply liquid to the nozzle. Under
these conditions a round shaped spray is obtained. 25
If it is required to produce a. fan-shaped spray,
' ing in the usual manner with the spray nozzle,
the trigger 4 is pulled further back, until the
`the liquid being fed through a suitable duct 3.
The liquid control valvev 2 is actuated by a trigger
30 4 pivoted on the frame yand having a pin 5 which
screwed abutment nut I5 on the valve sleeve I3
bears against the nut or stop 23 on the spindle of
moves against an adjustable collar 6 on the valve
spindle.
The lower portion of the frame, below said nee
dle valve, has a stepped bore 'I into which is fitted
35 a fixed valve seat 8. The compressed air enters
the air chamber 9, by way of the duct 9a., and
passes through the opening in the valve seat 8
into the second air chamber Ill. An air control
valve II is normally pressed by the spring I2 to
' 40 close the valve opening and such valve II~>is car
ried by a valve sleeve I3 slidably mounted in the
.gland I4. The valve IIV has a seating Washer IIa
’ iitted in a recess in its face.
A nut I5 is screwed
-on the said sleeve I3 and forms an adjustable
V45 abutment member or stop. A link I6 is pivoted
at one end to the trigger 4 whilst the other end
is engaged on the'valve sleeve I3 between the said
abutment nut I 5 and a lock nut I5a. An air con
duit I1 passes from the said second air chamber
_ 50 I0 and feeds compressed air to the air cap I8 to
give the round spray. A conduit I9 passes from
' the end of the said second air chamber I0 to thev
air cap I8 to give the fan-shaped spray.
The
conduit I9 is closed to the air feed'by means of a
55 second Valve 20 which seats on a fixed seating 2l, y
15
With the aforedescribed construction, when the '
the second valve, to thereby pull back the second 30
valve 2E) against the pressure of the spring 21. In
this latter position of the trigger, air will pass
through both conduits I'I and I9 leading to thev
air cap. By adjusting the Valveï25, in the conduit
'I 9 feeding air for producing the fan-shaped spray, 35
the desired form of spray can be obtained.
I claim:
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1. Apparatus .for spraying liquids or other ma
terials, comprising a frame, a control valve for
the liquid or material to be sprayed, slidably 40
mounted in the frame under control o-f a spring,
a spraying nozzle at which occurs, alternatively,
. round and fan vshaped sprays on said frame, a
trigger lever for actuating said liquid control
valve pivotally mounted at its upper end on said 45
frame, an abutment on said valve against which
the said trigger lever isïpressed to open the
valve and which abutment is spaced from the
trigger when in the inoperative position, a cham
ber in the frame for receiving compressed air 50
from the source of supply, a second air chamber
lin the framev in alignment with the aforemen
tioned chamber, an air control valve coacting
with a iiXed seating at the junction of and con
trolling communication between said chambers, 55
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2,121,924
a sleeve on the said air valve and slidably mount
ed under spring control in the frame under the
said liquid control valve, a spring normally press
ing the valve on its seating, an air conduit lead
receiving compressed air, a conduit pipe for de
livering compressed air from a source of supply
ing from said second chamber for supplying air
to said chamber and passing through a hand
grip fixed to the frame, a second air chamber
in the Vframe in alignment with said chamber,
to produce a round spray, a second air valve
an air control valve‘coacting with a fixed seating
spring pressed on a fixed seating and controlling
communication between the second air chamber
tion between said air chambers, a sleeve on the
and an air conduit for supplying air to produce
a fan-shaped spray, a spindle on this second air
valve slidably mounted in and projecting beyond
the said valve sleeve, means whereby the said
first air valve, the liquid Valve and the second
air valve are successively opened by pressure ap
plied by the said trigger in one direction to ob
tain either a round or a fan-shaped spray and
whereby the spring controlling the ñrst men
tioned air valve controls the position of the trig
ger lever in the inoperative position, and a sep
20 arate valve mounted on the frame for controlling
the flow of air through the said conduit supply
ing air to produce the fan-shaped spray in order
to ensure >a predetermined balance of air passing
through the two conduits leading to the spraying
25 nozzle to form a fan-shaped spray.
2. Apparatus for spraying liquids or other ma
terials, comprising a frame, a control valve for
the liquid or material to be sprayed, a spraying
nozzle at which occurs, alternatively, round and
30 Jian-shaped sprays on said frame, a trigger lever
for actuating said liquid control valve pivotally
mounted at its upper end on said frame, an abut
ment on said valve against which the said trig
ger lever is pressed to open the valve and which
‘.ìabutment is spaced from the trigger when in the
inoperative position, a chamber in the frame for
at the junction o1" and controlling communica
said air valve and slidably mounted under spring
control in the frame under the` said liquid con 10
trol valve, a spring normally pressing the said
valve on the seating, an air conduit leading from
said second air chamber for supplying air to
produce a round spray, a second air valve spring
pressed-on a ñXed seating and controlling Com 15
munication with an air conduit for supplying
air to produce a fan-shaped spray, a spindle
on this second air valve slidably mounted in and
projecting beyond the said valve sleeve, a lever
connected at one end to the trigger lever and 20
at its other end engaged on the outer end of' the
said valve sleeve, so that the valve sleeve is moved
on the initial movement of the trigger lever to
admit air to the spraying nozzle and so that-the
said spring controlling the movement of the 25
valve sleeve returns the trigger to its inoperative
position, an adjustable stop on the end of` the
valve sleeve projecting from the rear end of said
frame against which stop the- lever presses for
opening the ñrst mentioned air valve, and a stop
on the projecting end of the spindle of the said
second air valve, which stop is pressed against
on the movement of the valve sleeve for opening
the said second air valve.
HENRY JAMES NEWLIN.
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