Patent ID: 8123081

Claim:
A foam dispensing apparatus for dispensing a mixture of a first fluid and a second fluid, said apparatus comprising: a dispensing head for mixing the first fluid and the second fluid and dispensing the mixture onto a substrate; a handle extending from said dispensing head for a user to grasp and manipulate to operate said dispensing head; and a manifold assembly mounted to said dispensing head, said manifold assembly comprising: a purge portion defining a gas inlet, a cleansing fluid inlet, an outlet in fluid communication with said dispensing head, and a plurality of passageways interconnecting said gas inlet, said cleansing fluid inlet and said outlet for supplying a gas and a cleansing fluid to said dispensing head; a first supply portion mounted to said purge portion and defining a first material inlet for receiving the first fluid, a first material outlet coupled to said dispensing head for supplying said dispensing head with the first fluid and a first fluid passageway interconnecting said first material inlet and said first material outlet; a second supply portion mounted to said purge portion and defining a second material inlet for receiving the second fluid, a second material outlet coupled to said dispensing head for supplying said dispensing head with the second fluid and a second fluid passageway interconnecting said second material inlet and said second material outlet; said plurality of passageways including a gas passageway interconnecting said gas inlet and said outlet; and a gas regulator valve mounted to said purge portion and partially defining said gas passageway for regulating the fluid flow rate between said gas inlet and said outlet; said gas regulator valve including a continuous flow orifice permitting fluid communication at a pre-determined flow rate through said gas regulator valve when said gas regulator valve is in a closed position.