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.

Description

BACKGROUND OF THE INVENTION[0001]1. Technical Field[0002]The present invention is directed to portable chemical toilet recharge systems and, more particularly, to a portable toilet chemical recharge pumping system which includes a main conduit connected to a water source, a chemical conduit connected to a liquid chemical source, a water pump interposed in the main conduit between the inflow and outflow ends thereof, a chemical pump interposed in the chemical conduit, the outflow end of the chemical conduit connecting to the main conduit downstream of the water pump, a water pump timer operatively connected to the water pump, a chemical pump timer operatively connected to the chemical pump, a chemical flow control valve operatively connected to the chemical conduit downstream of the chemical pump for controlling flow of liquid chemicals therethrough, an anti-siphon valve mounted on the outflow end of the main conduit to prevent fluid flow out of the outflow end when the fluid flow fo...

AI Technical Summary

Benefits of technology

[0013]The present invention as thus described provides many improvements over those recharging devices and systems found in the prior art. For example, because of the anti-siphon valve affixed to the outflow end of the main conduit, accidental discharge of chemicals or the chemical / water mixture is generally prevented, thus making the recharging process far safer. Also, because the present invention provides both a pre-injection water flush period and a post-injection water flush period, it is highly unlikely that the chemical will be directed anywhere but in the intended location, namely, the portable chemical toilet being recharged. Finally, because the system of the present invention automatically combines the chemical with the water and delivers the desired mixed product to the portable chemical toilet through an easily directed and controlled hose having an anti-siphon check valve on the end thereof, it is believed that no special training or practice with the operation of the present invention will be necessary for a user to properly recharge a portable chemical toilet through use of the present invention. It is therefore seen that the present invention provides a substantial improvement over those devices and systems found in the prior art which attempt to perform a similar function.

Problems solved by technology

The clear disadvantage of such a process, however, is that it affords numerous opportunities for the chemical to contact the skin or eyes of the user, and due to the powerful nature of the chemicals, such contact with the skin and / or eyes can cause significant and possibly severe damage.

However, Mullett is intended primarily to periodically refresh the chemical toilet but is not intended to recharge the system, which requires a pumping system and control system which addresses the significant quantities of chemicals and water which must be added to the portable chemical toilet during the recharge process.

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