Abstract: A dual fluid cartridge assembly (30) is adapted to be used with a conventional caulking gun (20). The dual fluid cartridge assembly includes an outer cartridge (32), a piston seal and delivery tube (36), an upper piston seal (38) and an inner cartridge (34). The outer cartridge includes a cartridge outlet (40) for dispensing fluids and as configured to accept conventional mixing nozzles. Fluids are back-filled through the cartridge outlet into the inner cartridge and the outer cartridges. In order to prevent trapped air pockets during the filling of the fluid in the inner cartridge, one or more slots (54) are formed in a base plate (42) of the inner cartridge.

Abstract: A dual fluid cartridge for storing and dispensing fluids in unequal ratios is disclosed. The dual fluid cartridge disclosed defines two fluid chambers for a fluid to be held in greater amount and defines another fluid chamber for a fluid to be held in lesser amount. The two fluid chambers holding the fluid of greater amount are in fluid communication with one another through a delivery channel. Because of this arrangement, the dual fluid cartridge is very suitable and highly effective in situations where a dual fluid cartridge is needed to store and dispense fluids of unequal ratios (e.g. a 10:1 ratio, a 9:1 ratio, an 8:1 ratio, a 7:1 ratio etc.). With such an arrangement, the amount of space wasted in the cartridge is minimized, which maximizes the amount of fluids that can be stored in the cartridge. As a result, the total final product that can be dispensed from the dual fluid cartridge is also maximized.