Patent ID: 9730558
Date: 2017-08-15
CPC Classifications: A47K,B05B,B67D

Claim:
1. A system for dispensing foamed product, comprising: a housing for supporting one or more components of the system; a product dispensing nozzle received by the housing; a reservoir for storing liquid product; a mixing chamber operatively connected between the reservoir and the product dispensing nozzle; a conduit operatively connected to an upstream side of the product dispensing nozzle and a downstream side of the mixing chamber; a controller having one or more outputs; a liquid pump operatively connected to convey liquid product from the reservoir to the mixing chamber, wherein the liquid pump is actuated by an output of the controller; a liquid conduit having a first end and a second end, wherein the first end of the liquid conduit is connected to the liquid pump and the second end of the liquid conduit is connected to the mixing chamber, and wherein liquid pump conveys liquid product through the liquid conduit and into the mixing chamber; an air pump operatively connected to convey pressurized air to the mixing chamber; an air valve operatively connected to the mixing chamber for selectively relieving air pressure in the system, wherein the air valve is actuated by an output of the controller; and, a valve operatively connected to an upstream side of the conduit, the valve having an open state for allowing the foamed product to flow to the conduit and a closed state for the sealing the upstream side of the conduit with respect to the atmosphere, wherein the valve moves from the open state to the closed state upon relieving air pressure from the system; wherein the valve is configured to create a negative pressure in the conduit when the valve moves from the open state to the closed state.