Foam dispensing apparatus

Claim 1

A foam dispenser for converting a plurality of foam components into an expanded foam and having means for flushing the dispenser with a cleaning solution after the foam is discharged comprising, in combination: (a) a barrel having a plurality of passages formed therein which communicate with a mixing chamber; (b) a nozzle connected to the barrel having a bore therethrough, one end of which communicates with the mixing chamber while the other end provides an opening for discharging the expanded foam from the dispenser; (c) a tube for carrying each foam component to the dispenser, each such tube having a corresponding tube for carrying the cleaning solution to the dispenser; (d) a rotary valve member for each pair of foam component and cleaning solution tubes, each such valve having a single passageway formed therethrough with an inlet and outlet, each valve being mounted for movement on the barrel so that the inlet of each valve is rotatable between positions nearly coterminous with the outlets of the foam component tubes and the cleaning solution tubes, and the outlet of the valve remains in communication with the mixing chamber; and (e) means for moving all valves in unison between communication with the foam component carrying tubes and communication with the cleaning solution carrying tubes so that after the foam components have been mixed and the expanded foam discharged from the dispenser the entire dispenser, from the point where the foam components enter the dispenser, can be flushed with the cleaning solution.