Apparatus for applying liquid coatings

Apparatus for applying liquid coating comprising a pump to draw said coating from a container and provide a pressurized flow of said coating through hosing to a handle unit connecting with an applicator, an improvement of said handle unit including,

• a handle portion having a gripping section formed with an inner space, a flow control section connecting with said gripping section and an attaching section connecting with said flow control section,
• a handle fitting disposed in said gripping section inner space with an inner end of said fitting engaging an inner end wall of said gripping section inner space to form a seal therewith and with threads formed adjacent to an outer end of said fitting to engage with threads formed as part of said gripping section inner space and provide a connection spaced from said seal, and said fitting outer end prepared for assembly with a disconnect fitting,
• a spring having an end carried in a recess formed on said handle fitting inner end,
• a ball valve positioned in a valve space formed in said handle portion flow control section and engaging with an opposite end of said spring to seal against a beveled end wall of said valve space, said valve space connecting with an inner passage in said handle fitting,
• flow control devices comprising a pair of pushbuttons positioned one each in pushbutton spaces formed respectively on opposite sides of said valve space and connecting therewith, each said pushbutton having a stem engageable with said ball valve to respectively and in combination disengage said ball valve from said valve space beveled end wall and a head portion biased outwardly by a spring in said pushbutton space to engage an outer ring on said pushbutton head portion with a flange formed at an outer end of said pushbutton space respectively, each said spring maintained free from contact with said coating by a sealing ring carried on each said pushbutton stem,
• a passageway formed in said handle portion attaching section and connecting with said valve space, said passageway including a tapered section positioned adjacent to said valve space and a pair of opposingly positioned recesses formed in said passageway, and
• threads formed on said attaching section adjacent to an outer end of said attaching section,
• wherein during apparatus use said handle fitting seal-connection spacing resisting external forces applied by said hosing attached to said disconnect fitting to maintain said handle fitting and said handle portion gripping section in leakproof relationship and an inlet of said applicator and an inlet of an extension being selectively secured in said attaching section passageway with said passageway tapered section engaging with a tapered end of said inlet to form a seal therewith, said passageway recesses engaging with protuberants formed on said inlet to maintain a position of said applicator and said extension in a selective relationship with said handle unit pushbuttons, and said handle unit attaching section threads forming a connection with a nut carried by said inlet spaced from said seal, said seal-connection spacing and said protuberant-recess engagement resisting external forces applied to said applicator and said extension to maintain said inlet and said handle unit attaching section in a leakproof relationship.