US Patent 11298713 Device for dispensing essential oil or tincture

A portable liquid dispensing device which includes a liquid cartridge containing a prefilled desired liquid supported within the dispensing device. A dispensing mechanism is positioned within the device for engagement with the liquid cartridge for dispensing a desired amount of liquid from the liquid cartridge to an outlet exiting the device. An actuator button is also provided for actuating the dispensing mechanism and dispensing the desired amount of liquid through the outlet of the dispensing device. The dispensing mechanism includes a central shaft with a first end engaged with the actuator button, a second end is positioned adjacent the outlet, and a plunger assembly is supported on the central shaft intermediate the first and second ends for substantially sealed engagement with an internal surface of the liquid cartridge and central shaft to move the plunger assembly and liquid toward the outlet upon actuation of the actuator button. Upon deactivation of the actuator button, the central shaft slidably moves or retracts through the plunger assembly, without moving the plunger assembly.