Electronic cigarette with liquid reservoir

What is this patent about?

’114 is related to the field of electronic cigarettes, specifically focusing on the structural architecture of a liquid delivery system within a vaporizing cartridge. Traditional designs often rely on porous materials to hold liquid, which can limit storage capacity and require frequent cartridge replacements. The invention addresses the need for a more efficient, high-capacity storage solution that reliably transports liquid to a heating element without leaking or flooding the internal airflow path.

The underlying idea behind ’114 is the use of a sealably separated, non-porous liquid reservoir that utilizes a capillary wick to bridge the gap between a bulk fluid supply and an isolated atomizing chamber. By routing a wick through specific apertures in the chamber wall, the system creates a controlled fluidic interface. This allows the device to maintain a large volume of free-flowing liquid in an annular space while ensuring that only the amount of liquid needed for vaporization is drawn into the heating zone.

The claims of ’114 focus on a cartridge assembly featuring an atomizing chamber with at least two wick apertures and a central chimney that sealably passes through the liquid reservoir to the mouthpiece. The independent claims specifically protect the arrangement where the liquid reservoir is defined by the space between the outer housing and the internal chimney/chamber structure. This configuration ensures the aerosol path is completely isolated from the surrounding liquid supply while allowing the wick ends to emerge from the chamber directly into the reservoir.

In practice, the invention works by positioning a resistive heating coil inside the atomizing chamber with a fibrous wick passing through its center. The ends of this wick exit the chamber through apertures that are precision-fitted to create a compressive seal, preventing bulk liquid from entering the air path. As the user draws air through the device, the heating element vaporizes the liquid held in the wick, and the resulting aerosol is channeled through the chimney to the outlet, while capillary action simultaneously replenishes the wick from the surrounding reservoir.

This approach differs from prior solutions by eliminating the reliance on liquid-soaked sponges or polyfill materials, which often trap usable liquid and reduce total capacity. By employing a translucent window and a free-liquid reservoir, the design provides a clear visual indicator of remaining fluid levels. Furthermore, the integration of the chimney and atomizing chamber as a single unit, combined with a resilient seal at the top of the reservoir, creates a robust, leak-resistant architecture that supports a longer duration of use between refills or cartridge changes.