Патент USA US2121924код для вставки
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 ' ` f E ’ Y Y 1 2,121,924 ` » l y SPRAYING APPARATUS Henry James Newlin, Birmingham,` England l Application May 1, 1935, Seriall No."19,280 2 Claims. y, (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. y ì 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: y ‘ . 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 2 _ 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.