Portable pressurized paint gun
[ Apr. 29 1975 United States Patent [1 1 Chandler 2,631,891 3/1953 Kochner et a1. 239/308 3.119.561 1/1964 239/308 X 1 PORTABLE PRESSURIZED PAINT GUN [76] Inventor:  
  um mm Cd 0a KH 50 67 99 H 74 40 41 J 700 90 33 Estal D. Chandler, 1205 N.  
 Cleveland, Cameron, Tex. 76520 Mar. 8, 1973 [22] Filed:  
 Primary E.\&#39;aminerM. Henson Wood, Jr. Assistant ExaminerMichael Mar 21 Appl. No.: 339,331  
 Attorney, Agent, or Firm-Wayland D. Keith [57] ABSTRACT A modified spray paint gun carries a gas bomb in the [52] U.S. Cl. 239/308; 222/5; 239/526 [51] Int. B05b 7/02 handle, thereby making the gun more portable by M5 B 2 0 2 O2 6 82 O5 3 5 OOQL 5 B9 93 32 2 h c r a e S f 0 d l e i F m 5 1 being independent of a separate air supply. At the same time, the bomb loading means allows for conventional attachment of a separate air supply when so desired.  
  5 T N m n mm m mT ms e D E u N U M 5 239/308 X 239/308 X 2 Claims, 2 Drawing Figures PORTABLE PRESSURIZED PAINT GUN This invention relates to commercial painting accessories and more specifically to paint spray guns.  
  The principal object of this invention is to provide a spray gun in which the handle accepts a gas bomb in order to make the gun independent of a separate air supply. The bomb chamber has a piercing pin at the upper end and a threaded gas-tight closure at the lower end that serves two functions, namely, 1, retaining and piercing the bomb and, 2, provision for attachment of a conventional external air supply.  
  Another object of this invention is to provide a portable pressurized paint gun that is of simple construction, easy to use and recharge, quick to convert reliably to an external air supply and yet low in cost.  
  These and other objects will become evident upon a study of the following specification together with the accompanying drawing wherein:  
  FIG. 1 is an elevation view, partly broken away, of the paint gun in use with a gas cartridge or gas bomb;  
  FIG. 2 is a fragmentary view, partly in section, of the paint gun shown connected to an external air supply.  
  Referring to the figures, a portable pressurized paint gun 10, according to the invention, shows a housing 11 in which are recognized a conventional nozzle 12, a finger lever 13, spray controls 14 and 15, a throat 16 leading to a threaded cap 16A and a paint container 17.  
  The handle 18 is provided with a cylindrical chamber 19 leading to a passage 20 into housing 11. Passage 20 has supported therein centrally a piercing pin 21. At the lower end of handle 18 a closure 22 shows a threaded portion 23 mounting a button 24 at the upper end thereof, which closure has a body 25 which body terminates in a knurled ring 26. When threaded into handle 18, closure 22 is made pressure tight by inclusion of a pair of O-rings 27. An automobile tire type valve stem 28 is fitted into body 25 which prevents outward flow of air or gas through passage 29. From the valve a passage 29 leads to the interior chamber 19. A thread 28A on valve 28 accepts a connector 31 on an air hose 32.  
  Inspection of FIG. 1 will show how a gas cartridge or bomb may be dropped into chamber 19 and, by turning closure 22 home, the cartridge is pierced by pin 21 thereby supplying gas and paint to nozzle 12 under pressure by the use of controls l3, l4 and 15.  
  Since valve 28 is a check valve to prevent the escape of gas to atmosphere the gas pressure in chamber 19 cannot escape therethrough. However, when an external air supply is connected by attaching hose 32, the air under pressure will be directed to the conventional spray gun 10 when the cartridge 30 is removed.  
  The invention therefore combines the advantage of conventional air-supplied guns and that of independent portability by using replaceable cartridges.  
  In order to have control over the air volume or to be able to shut off the gun completely while changing the paint container, an air inlet control 34 is included in passage 20.  
 What I now claim is:  
 1. A portable, dual, pressurized paint gun, which paint gun comprises;  
 a. a housing.  
 1. a handle on said housing,  
 2. a valved passage through said housing,  
 3. a paint spray nozzle on said housing,  
 4. an air hose connected to said housing,  
 b. said handle having a chamber formed therein to receive a gas cartridge,  
 1. a closure forming a surge and dispensing control means within said handle to selectively regulate the flow of paint and pressure therethrough,  
 c. a paint container connected in fluid tight communication with the passage in said housing, so upon actuation of said controls the quantity of paint dispensed from said container can be regulated,  
 cl. said handle is provided with a gas cartridge piercing pin,  
 1. a threaded closure for said piercing operation,  
 e. an air inlet control means incorporated in the passage leading from the gas cartridge chamber to the spray gun controls for the purpose of controlling the air volume to the spray gun and to completely close off the air when the paint container is being changed.  
 2. A portable, dual, pressurized paint gun, which paint gun comprises;  
 a. a housing,  
 1. a handle on said housing,  
 2. a valved passage through said housing,  
 3. a paint spray nozzle on said housing,  
 4. an air hose connection on said housing,  
 b. said handle having a chamber formed therein to receive a gas cartridge,  
 1. a gas cartridge provided in said handle,  
 2. a closure forming a surge and dispensing control means within said handle to selectively regulate the flow of paint and pressure therethrough,  
 c. a paint container connected in fluid tight communication with the passage in said housing, so upon actuation of said controls, the quantity of paint dispensed from said container can be regulated,  
 d. said handle is provided with a gas cartridge piercing pin,  
 1. a threaded closure in said handle to close the chamber formed therein, said threaded closure being in contact relation with said gas cartridge to urge said gas cartridge against said piercing pin, when said threaded closure in in one position,  
 e. a gas inlet control means incorporated in the passage leading from the gas cartridge chamber to the spray gun controls for the purpose of controlling the&#39;gas volume to the spray gun and to selectively close off the gas, when the paint container is being changed.