Alternating selectable cleaning fluid to air purging system

Claim 1

A purging system for cleaning passageways in fluid delivery systems such as paint spray guns, and the like, comprising: storage tank means for storing and supplying a cleaning solvent to a fluid delivery system; coaxial hose means connected to said storage tank means; connecting means for connecting said coaxial hose means to said fluid delivery system to be purged; an in-line valve means in said coaxial hose means for alternately selecting flow through said coaxial hose means from an inner conduit to an outer conduit and back; said in-line valve means comprising; tubular means connected in line with said coaxial hose means having coaxial inlet passageways and an outlet passageway; sleeve means slideably mounted on said tubular means; said sleeve means slideable on said tubular means to alternately connect said coaxial inlet passageways to said outlet passagway so that a fluid delivery system connected to said coaxial hose means may be quickly alternated between purging fluid and purging air; delivery means for delivering said cleaning solvent to one of said conduits of said coaxial hose; air pressure supply means connected to supply air under pressure to the other of said conduits in said coaxial hose; whereby a fluid delivery system connected to said coaxial hose means may be alternately purged with a cleaning solvent and air under pressure.