Patent ID: 7156112
Filing Date: 2007-01-02
Classification: B08B

Abstract:
1. A cleaning system for a paint supply system comprising: a pump for circulating solvent through the internal components of the paint supply system, said pump including at least one expanding and contracting pumping chamber; and an air injection system for injecting pressurized air into said pump, said air injection system injecting air directly into said pumping chamber of said pump, whereby said air is entrained within said solvent; a control means for controlling said air injection system to inject air into said pumping chamber as said pumping chamber is expanding; wherein said control means includes an injection valve operatively connected between said pumping chamber and a supply of pressurized air, said valve being operable to connect said supply of pressurized air to said pumping chamber; wherein said control means further includes an actuation valve operatively connected between said injection valve and a supply of pressurized air, said valve being operable to connect said supply of pressurized air to said injection valve, said injection valve being configured to open in response to said pressurized air; and wherein said pump is a pneumatically actuated pump, said pump including at least one air chamber for operating said pump, said control means including a means for opening said actuation valve in response to pressure within said air chamber.