Patent ID: 8566972

Claim:
A liquid aroma injector for a spa, comprising: a reservoir having a top and a bottom, and comprising an upper chamber proximal to the top of said reservoir, a subchamber proximal to the bottom of said reservoir, and a lower chamber located between said upper chamber and said chamber, said upper and lower chambers and said subchamber being in fluid communication with each other, wherein said lower chamber and said subchamber contain a metered amount of liquid aroma; a plunger assembly capable of moving within said reservoir and comprising a plunger button for moving the plunger assembly, an annular flanged gasket, and a shaft connecting the plunger button and the annular flanged gasket, wherein said annular flanged gasket comprises a vertical, tubular wall and a tubular flanged ring, together having a V-shaped or partial D-shaped cross section extending from a common vertex with a tubular wall at an angle; a hollow nozzle fitting attached to the bottom of said reservoir and having a channel therethrough, whereby liquid aroma can flow within the reservoir from said upper chamber, through said lower chamber, through said subchamber, and out of the reservoir through the hollow nozzle fitting; a hose connected to said hollow nozzle fitting at a first end and in fluid connection with the reservoir, whereby the liquid aroma can flow through a hollow nozzle channel within said hollow nozzle fitting into the hose; and a liquid aroma diffuser connected to said hose at a second end and in fluid communication with the hose, whereby, when said plunger button is depressed, the tubular flanged ring of the annular flanged gasket moves within said lower chamber and said plunger assembly injects only the metered amount of the liquid aroma into water in the spa.