Foam Dispensing Gun with Third Stream

Abstract

A two-component spray gun is illustrated that utilizes a third stream for dispensing at least some, and in some instances all, of the requisite foam precursor reactants and/or blowing agents in combination with the “A” and “B” reactant streams.

What is claimed is: 
     
         1 . A foam spray gun which comprises:
 a housing having a front and a rear;   a removable nozzle at the front of the housing;   a pair of input hoses for at least one polyol and at least one diisocyanate, said pair of input hoses in fluid communication with the removable nozzle at one end, said hoses also in fluid communication with a storage container for each of said at least one polyol and at least one diisocyanate at an opposed end, at least one of the at least one polyol and at least one diisocyanate entering the opposed end via a liquid pump;   a third input hose in communication with said removable nozzle for dispensing a liquid or a gas blowing agent or combinations thereof;   a pivotable trigger for controlling dispensing of said at least one polyol and said at least one diisocyanate in said pair of input hoses, said trigger adjacent a handle;   a control mechanism for controlling dispensing of said liquid or gas from said third input hose wherein the control mechanism is either a separate trigger or the pivotable trigger for controlling dispensing of the at least one polyol and the at least one diisocyanate.   
     
     
         2 . The foam spray gun of  claim 1 , wherein
 said removable nozzle is temperature sensitive changing from a first color to a second color upon a temperature change within said nozzle.   
     
     
         3 . The foam spray gun of  claim 1 , wherein said removable nozzle further comprises:
 a temperature sensitive tape positioned on said nozzle, said pressure sensitive tape being temperature sensitive changing from a first color to a second color upon a temperature change within said nozzle.   
     
     
         4 . The foam spray gun of  claim 1 , wherein
 at least one of said pair of hoses has a temperature sensitive tape positioned thereupon, said pressure sensitive tape being temperature sensitive changing from a first color to a second color upon a temperature change within said hose.   
     
     
         5 . The foam spray gun of  claim 1 , wherein
 said control mechanism for controlling dispensing from said third hose is positioned on said pivotable trigger.   
     
     
         6 . The foam spray gun of  claim 1 , wherein
 said control mechanism for controlling a dispensing from said third hose is positioned on a side of a housing of said spray gun.   
     
     
         7 . The foam spray gun of  claim 1 , wherein
 said control mechanism for controlling a dispensing from said third hose is positioned adjacent a handle of said spray gun.   
     
     
         8 . The foam spray gun of  claim 1 , which further comprises:
 a high/low pivotable control within said gun, said control within a flow path within said gun and post ingress of said at least one polyol and said at least one diisocyanate.   
     
     
         9 . The foam spray gun of  claim 1 , which further comprises:
 a safety lock biased in a locked position, said lock positioned on a front face of said pivotable trigger for controlling dispensing of said at least one polyol and said at least one diisocyanate.   
     
     
         10 . The foam spray gun of  claim 1 , wherein
 said pair of input hoses are upwardly canted to enter said gun from on top of a housing of said gun.   
     
     
         11 . A foam spray gun which comprises:
 a housing having a front and a rear;   a removable nozzle at the front of the housing;   a pair of input hoses for at least one pressurized “B-side” polyol and at least one pressurized “A-side” diisocyanate, said pair of input hoses in fluid communication with the removable nozzle at one end, said hoses also in fluid communication with a storage container for each of said at least one pressurized “B-side” polyol and at least one pressurized “A-side” diisocyanate at an opposed end;   a third input hose in communication with said removable nozzle for dispensing a pressurized liquid or a pressurized gas or combinations thereof, the third input hose comprising at least one gaseous agent and at least one additional reactant selected from the group consisting of at least one different polyol from the at least one “B-side polyol”, at least one plasticizer, at least one flame retardant, at least one surfactant, at least one catalyst, at least one blowing agent, at least one pressurizing inert gas and water;   a pivotable trigger for controlling dispensing of said at least one polyol and said at least one diisocyanate in said pair of input hoses, said trigger adjacent a handle; and   a control mechanism for controlling dispensing of said liquid or gas from said third input hose wherein the control mechanism is either a separate trigger or the pivotable trigger for controlling dispensing of the at least one polyol and the at least one diisocyanate.   
     
     
         12 . The foam spray gun of  claim 11 , wherein
 said removable nozzle is temperature sensitive changing from a first color to a second color upon a temperature change within said nozzle.   
     
     
         13 . The foam spray gun of  claim 11 , wherein said removable nozzle further comprises:
 a temperature sensitive tape positioned on said nozzle, said pressure sensitive tape being temperature sensitive changing from a first color to a second color upon a temperature change within said nozzle.   
     
     
         14 . The foam spray gun of  claim 11 , wherein
 at least one of said pair of hoses has a temperature sensitive tape positioned thereupon, said pressure sensitive tape being temperature sensitive changing from a first color to a second color upon a temperature change within said hose.   
     
     
         15 . The foam spray gun of  claim 11 , wherein
 said control mechanism for controlling dispensing from said third hose is positioned on said pivotable trigger.   
     
     
         16 . The foam spray gun of  claim 11 , wherein
 said control mechanism for controlling a dispensing from said third hose is positioned on a side of a housing of said spray gun.   
     
     
         17 . The foam spray gun of  claim 11 , wherein
 said control mechanism for controlling a dispensing from said third hose is positioned adjacent a handle of said spray gun.   
     
     
         18 . The foam spray gun of  claim 11 , which further comprises:
 a high/low pivotable control within said gun, said control within a flow path within said gun and post ingress of said at least one polyol and said at least one diisocyanate.   
     
     
         19 . The foam spray gun of  claim 11 , which further comprises:
 a safety lock biased in a locked position, said lock positioned on a front face of said pivotable trigger for controlling dispensing of said at least one polyol and said at least one diisocyanate.   
     
     
         20 . The foam spray gun of  claim 11 , wherein
 said pair of input hoses are upwardly canted to enter said gun from on top of a housing of said gun.   
     
     
         21 . A foam spray gun which comprises:
 a housing having a front and a rear;   a removable nozzle at the front of the housing;   a pair of input hoses for at least one pressurized “B-side” reactant comprising at least one polyol and at least one pressurized “A-side” diisocyanate, said pair of input hoses in fluid communication with the removable nozzle at one end, said hoses also in fluid communication with a storage container for each of said at least one pressurized “B-side” reactant and at least one pressurized “A-side” diisocyanate at an opposed end;   a third input hose in communication with said removable nozzle for dispensing a pressurized liquid or a pressurized gas or combinations thereof, the third input hose comprising at least one additional reactant selected from the group consisting of at least one gaseous blowing agent, at least one polyol, at least one plasticizer, at least one flame retardant, at least one surfactant, at least one catalyst, at least one pressurizing inert gas and water, wherein at least one additional reactant in the third input hose is the same as at least one “B-side” reactant;   a pivotable trigger for controlling dispensing of said at least one polyol and said at least one diisocyanate in said pair of input hoses, said trigger adjacent a handle; and   a control mechanism for controlling dispensing of said liquid or gas from said third input hose wherein the control mechanism is either a separate trigger or the pivotable trigger for controlling dispensing of the at least one polyol and the at least one diisocyanate.   
     
     
         22 . The foam spray gun of  claim 21 , wherein
 said removable nozzle is temperature sensitive changing from a first color to a second color upon a temperature change within said nozzle.   
     
     
         23 . The foam spray gun of  claim 21 , wherein said removable nozzle further comprises:
 a temperature sensitive tape positioned on said nozzle, said pressure sensitive tape being temperature sensitive changing from a first color to a second color upon a temperature change within said nozzle.   
     
     
         24 . The foam spray gun of  claim 21 , wherein
 at least one of said pair of hoses has a temperature sensitive tape positioned thereupon, said pressure sensitive tape being temperature sensitive changing from a first color to a second color upon a temperature change within said hose.   
     
     
         25 . The foam spray gun of  claim 21 , wherein
 said control mechanism for controlling dispensing from said third hose is positioned on said pivotable trigger.   
     
     
         26 . The foam spray gun of  claim 21 , wherein
 said control mechanism for controlling a dispensing from said third hose is positioned on a side of a housing of said spray gun.   
     
     
         27 . The foam spray gun of  claim 21 , wherein
 said control mechanism for controlling a dispensing from said third hose is positioned adjacent a handle of said spray gun.   
     
     
         28 . The foam spray gun of  claim 21 , which further comprises:
 a high/low pivotable control within said gun, said control within a flow path within said gun and post ingress of said at least one polyol and said at least one diisocyanate.   
     
     
         29 . The foam spray gun of  claim 21 , which further comprises:
 a safety lock biased in a locked position, said lock positioned on a front face of said pivotable trigger for controlling dispensing of said at least one polyol and said at least one diisocyanate.   
     
     
         30 . The foam spray gun of  claim 21 , wherein
 said pair of input hoses are upwardly canted to enter said gun from on top of a housing of said gun.