Bowles Fluidics Corporation

Shawn Martin

Alan Romack

Shridhar Gopalan

Aland Santamarina

An improved spa nozzle that is capable of entraining high air flow rates from the surrounding environment, said nozzle of the type having a water input conduit of diameter D, a flow output conduit having entry and diameter of DID, a transition conduit having a diameter of ID and a length of PL, and an air entrainment conduit, and wherein the following ratios are defined to describe the relative geometry of the nozzle: &#x3b1;=PL/(DID&#x2212;ID), &#x3b2;=DID/ID and &#x3b3;=D/ID, the improvement comprising: the water input, transition and output conduits being configured such that &#x3b1; is in the range of 1.3-5 and &#x3b2; is&#x3e;1.9.

Spa jet yielding increased air entrainment rates

An improved injector which mixes a secondary fluid into a carrier fluid stream has (a) a body for directing the flow of the carrier fluid, this body having an internal wall forming a flow passage therethrough, a central axis, an inlet, an outlet, and a port for receiving the secondary fluid that is mixed with the carrier fluid, (b) a ramp-like restriction portion which is located downstream of the body's inlet and upstream of the secondary fluid port and configured so as to decrease the effective cross-sectional area of the flow passage in the direction of the flow of the carrier fluid, (c) a ramp-like expansion portion which is located downstream of the secondary fluid port and upstream of the body's outlet and configured so as to increase the effective cross-sectional area of the flow passage in the direction of the flow of the carrier fluid, (d) a throat portion which is situated between the restriction and expansion portions, and (e) a cavity in the throat that extends from its internal wall and into the body, with the port entering the flow passage at a location in the throat cavity, and wherein this cavity is configured so to promote a vortical flow of the secondary fluid in the cavity.

Growing community of inventors

Annapolis, MD, United States of America

Shawn Martin