Spray washer

A cleaning apparatus for automatic cleaning of paint spray gun assemblies, comprising:

• a cleaning cabinet having a bottom opening,
• a paint cleaning fluid flow-line system comprising a fluid distribution system, a pneumatically actuated fluid pump and a housing for cleaning fluid, said housing being below said bottom opening for circulating flow of fluid through said bottom opening to said housing,
• said fluid pump being adapted to effect circulation of cleaning fluid under pressure, through said flow-line system,
• said fluid pump having a fluid inlet and a fluid outlet, a fluid delivery line for flow of cleaning fluid from said fluid outlet to said fluid distribution system, and a return line for flow of cleaning fluid from said housing to said fluid inlet,
• a plurality of cleaning fluid outlets in said fluid distribution system for ejection of cleaning fluid under pressure within said cabinet, a sub-plurality of said outlets defining means for supporting a spray gun in said cabinet with a paint passage interior of the gun in direct fluid flow communication with a said outlet,
• an air-flow system having an air delivery line, said fluid pump having an air inlet in air flow communication with said air delivery line,
• said air-flow system and said fluid flow-line system having separate independent flow lines, and
• time control means in said air-flow system adapted to interrupt the action of the fluid pump and thence circulation of fluid in said fluid flow-line system within a predetermined time.