Portable toilet chemical recharge pumping system

Abstract

A portable toilet chemical recharge pumping system includes a water source and a main conduit with a water pump, and a liquid chemical solution source with a chemical conduit and a chemical pump, the chemical conduit connected to the main conduit below the water pump. A water pump timer and a chemical pump timer each engage and disengage the water and chemical pumps, and a chemical flow control valve controls chemical flow through the chemical conduit. An anti-siphon valve on the end of the main conduit prevents unintentional liquid flow, and the water and chemical pump timers and the chemical flow control valve control liquid flow through the main and chemical conduits to provide a pre-injection water flush period, a liquid chemical injection period wherein liquid chemical flows into the main conduit, and a post-injection water flush period wherein water continues to flow out of the anti-siphon valve.

1 . A portable toilet chemical recharge pumping system comprising:
 a water source;   a main conduit in liquid transmission connection with said water source at the inflow end thereof, said main conduit including a first main conduit section and a second main conduit section;   a water pump interposed between said first and second main conduit sections of said main conduit operative to draw water from said water source through said first main conduit section and force water onwards through said second main conduit section;   a liquid chemical solution source;   a chemical conduit in liquid transmission connection with said liquid chemical solution source, said chemical conduit including a first chemical conduit section and a second chemical conduit section;   a chemical pump interposed between said first and second chemical conduit sections of said chemical conduit operative to draw liquid chemical from said liquid chemical solution source through said first chemical conduit section and force liquid chemical onwards through said second chemical conduit section;   said second chemical conduit section connected in liquid chemical solution transmission to said second main conduit section whereby liquid chemical is added to the water flowing through said second main conduit section;   a water pump timer operative to engage and disengage said water pump;   a chemical pump timer operative to engage and disengage said chemical pump;   a chemical flow control valve operatively connected to said second chemical conduit section for controlling flow of liquid chemical through said second chemical conduit section;   an anti-siphon valve mounted on said main conduit at an outflow end of said main conduit, said anti-siphon valve operative to prevent fluid flow out of said outflow end of said main conduit when fluid flow force drops below a predetermined amount; and   said water pump timer, said chemical pump timer and said chemical flow control valve operative to control liquid flow through said main conduit and said chemical conduit with said water pump timer initiating operation of said water pump for a predetermined pre-injection water flush period wherein water flows through said main conduit, said chemical pump timer initiating operation of said chemical pump and opening of said chemical flow control valve for a predetermined liquid chemical injection period wherein liquid chemical flows through said chemical conduit through said chemical flow control valve into said main conduit to mix with said water such that the resulting water/chemical mixture flows through said anti-siphon valve out of said outflow end of said main conduit, said chemical pump timer operative to close said chemical flow control valve and disengage said chemical pump upon a specified amount of liquid chemical being added to the water flow through said main conduit, said water pump timer disengaging operation of said water pump following a predetermined post-injection water flush period wherein water flows through said main conduit out of said anti-siphon valve, said anti-siphon valve operative to prevent fluid flow out of said outflow end of said main conduit when said water pump is disengaged.   
   
   
       2 . The portable toilet chemical recharge pumping system of  claim 1  further comprising a solenoid switch operatively interposed between an electrical power source and said water pump timer and said chemical pump timer for simultaneously engaging said water pump timer and said chemical pump timer by permitting electricity to flow to the timers upon said solenoid switch being engaged. 
   
   
       3 . The portable toilet chemical recharge pumping system of  claim 1  wherein said chemical flow control valve is a solenoid valve. 
   
   
       4 . The portable toilet chemical recharge pumping system of  claim 1  wherein said pre-injection water flush period is between one (1) and ten (10) seconds. 
   
   
       5 . The portable toilet chemical recharge pumping system of  claim 1  wherein said main conduit and said chemical conduit each are constructed of generally flexible hoses. 
   
   
       6 . The portable toilet chemical recharge pumping system of  claim 1  wherein operation of said chemical pump during said predetermined liquid chemical injection period results in injection of between approximately one to ten (1 to 10) ounces of chemical into said main conduit. 
   
   
       7 . The portable toilet chemical recharge pumping system of  claim 1  wherein operation of said water pump during said pre-injection water flush period, said predetermined liquid chemical injection period and said post-injection water flush period results in transfer of between approximately one to seven (1 to 7) gallons of water from said water source out of said anti-siphon check valve into a portable toilet being recharged. 
   
   
       8 . A portable toilet chemical recharge pumping system comprising:
 a water source;   a main conduit in liquid transmission connection with said water source at the inflow end thereof, said main conduit including a first main conduit section and a second main conduit section;   a water pump interposed between said first and second main conduit sections of said main conduit operative to draw water from said water source through said first main conduit section and force water onwards through said second main conduit section;   a liquid chemical solution source;   a chemical conduit in liquid transmission connection with said liquid chemical solution source, said chemical conduit including a first chemical conduit section and a second chemical conduit section;   a chemical pump interposed between said first and second chemical conduit sections of said chemical conduit operative to draw liquid chemical from said liquid chemical solution source through said first chemical conduit section and force liquid chemical onwards through said second chemical conduit section;   said second chemical conduit section connected in liquid chemical solution transmission to said second main conduit section whereby liquid chemical is added to the water flowing through said second main conduit section;   a water pump timer operative to engage and disengage said water pump;   a chemical pump timer operative to engage and disengage said chemical pump;   a chemical flow control valve operatively connected to said second chemical conduit section for controlling flow of liquid chemical through said second chemical conduit section;   an anti-siphon valve mounted on said main conduit at an outflow end of said main conduit, said anti-siphon valve operative to prevent fluid flow out of said outflow end of said main conduit when fluid flow force drops below a predetermined amount;   a solenoid switch operatively interposed between an electrical power source and said water pump timer and said chemical pump timer for simultaneously engaging said water pump timer and said chemical pump timer by permitting electricity to flow to the timers upon said solenoid switch being engaged;   said solenoid switch, said water pump timer, said chemical pump timer and said chemical flow control valve operative to control liquid flow through said main conduit and said chemical conduit with said solenoid switch simultaneously engaging said water pump timer and said chemical pump timer, said water pump timer initiating operation of said water pump for a predetermined pre-injection water flush period wherein water flows through said main conduit, said chemical pump timer then initiating operation of said chemical pump and opening of said chemical flow control valve for a predetermined liquid chemical injection period wherein liquid chemical flows through said chemical conduit through said chemical flow control valve into said main conduit to mix with said water such that the resulting water/chemical mixture flows through said anti-siphon valve out of said outflow end of said main conduit, said chemical pump timer then operative to close said chemical flow control valve and disengage said chemical pump upon a specified amount of liquid chemical being added to the water flow through said main conduit, said water pump timer then disengaging operation of said water pump following a predetermined post-injection water flush period wherein water flows through said main conduit out of said anti-siphon valve, said anti-siphon valve operative to prevent fluid flow out of said outflow end of said main conduit when said water pump is disengaged.   
   
   
       9 . The portable toilet chemical recharge pumping system of  claim 8  wherein said chemical flow control valve is a solenoid valve. 
   
   
       10 . The portable toilet chemical recharge pumping system of  claim 8  wherein said pre-injection water flush period is between one (1) and ten (10) seconds. 
   
   
       11 . The portable toilet chemical recharge pumping system of  claim 8  wherein said main conduit and said chemical conduit each are constructed of generally flexible hoses. 
   
   
       12 . The portable toilet chemical recharge pumping system of  claim 8  wherein operation of said chemical pump during said predetermined liquid chemical injection period results in injection of between approximately one to ten (1 to 10) ounces of chemical into said main conduit. 
   
   
       13 . The portable toilet chemical recharge pumping system of  claim 8  wherein operation of said water pump during said pre-injection water flush period, said predetermined liquid chemical injection period and said post-injection water flush period results in transfer of between approximately one to seven (1 to 7) gallons of water from said water source out of said anti-siphon check valve into a portable toilet being recharged.