Method and system for emptying wetlines of a tanker truck

Abstract

In a system and method for emptying wetlines on a tanker truck, a pipe is secured to the tanker truck and extends from the wetlines to the top of the housing tank of the tanker truck. A pump is mounted in the pipe or a housing connected to the pipe. The pump is preferably driven by air flow from a compressor.

What is claimed, is:  
     
         1 . A method of emptying wetlines associated with a housing tank of a tanker truck, comprising, 
 pumping liquid in the wetlines into the housing tank, through a separate pipe extending from the wetlines to a location at or near the top of the housing tank.    
     
     
         2 . A method of  claim 1 , wherein the separate pipe extends from the wetlines to a location above or near the highest surface of the liquid in the housing tank.  
     
     
         3 . A method of  claim 1 , wherein the separate pipe extends along an inner surface of the housing tank.  
     
     
         4 . A method of  claim 1 , wherein the separate pipe extends along an outer surface of the housing tank.  
     
     
         5 . A method of  claim 1 , wherein the liquid is pumped using a diaphragm pump.  
     
     
         6 . A method of  claim 5 , wherein the pump is driven by fluid flow.  
     
     
         7 . A method of  claim 6 , wherein the fluid flow is air flow from a conventional compressed air source of regular air.  
     
     
         8 . Means for emptying wetlines associated with a holding tank on a tanker truck, comprising 
 a pipe extending from the wetlines to a location at or near the top of the housing tank, and    a pump for pumping the liquid along the pipe into the housing tank.    
     
     
         9 . Means according to  claim 8 , wherein the pump is a diaphragm pump mounted in the pipe or in a housing connected in fluid flow communication with the pipe.  
     
     
         10 . Means according to  claim 8 , wherein the pump is a diaphragm pump driven by fluid flow.  
     
     
         11 . Means according to  claim 10 , wherein the fluid flow is regular air flow from a conventional compressed air source.  
     
     
         12 . Means according to  claim 10 , wherein the fluid is air, water, or oil.  
     
     
         13 . Means according to  claim 8 , wherein the pipe extends from the wetlines to a location above or near the highest surface of the liquid in the housing tank..  
     
     
         14 . Means according to  claim 8 , wherein the pipe extends along an inner surface of the housing tank.  
     
     
         15 . Means according to  claim 8 , wherein the separate pipe extends along an outer surface of the housing tank.  
     
     
         16 . Means for propelling liquid through a pipe, comprising 
 a diaphragm pump mounted in the pipe or a housing connected in fluid flow communication with the pipe, wherein the pump is operated by air flow from a conventional compressed air source.