Adjustable adapter for gravity-feed paint sprayer

An adjustable adapter for connecting a container having an outlet and an applicator having an inlet, comprising:

• a first arm having an axis, an axial bore, a surface normal to said axis with a fluid opening, an end for connection to said inlet of said applicator, and a passageway for fluid communication between said first arm surface opening and said applicator;
• a second arm coaxial with said first arm having an axial bore aligned with said first arm bore, a surface normal to said axis with a fluid opening, said second arm surface facing said first arm surface, an end for connection to said outlet of said container, and a passageway for fluid communication between said second arm surface opening and said container;
• a fastener extending through said bores;
• and
• an inner seal and an outer seal;
• wherein at least one of said surfaces is provided an annular groove spaced radially from said bores, said at least one annular groove being in fluid communication with said surface openings;
• wherein said inner seal is positioned between said bores and said at least one annular groove and said outer seal is positioned outside said at least one annular groove;
• and
• wherein, when in a rotation-resisting mode, said fastener forces said surfaces of said arms toward one another sufficiently to increase friction and resist rotation therebetween and, when in a rotation-permitting mode, said fastener releases said surfaces sufficiently to decrease friction and permit rotation therebetween.

An adjustable adapter for connecting a container having a threaded outlet and an applicator having a threaded inlet, comprising:

• a first arm having an axis, an axial bore, a generally planar surface normal to said axis with a fluid opening, a threaded end for threaded connection to said threaded inlet of said applicator, and a passageway for fluid communication between said first arm surface opening and said applicator;
• a second arm coaxial with said first arm having an axial bore aligned with said first arm bore, a generally planar surface normal to said axis with a fluid opening, said second arm surface facing said first arm surface, a threaded end for threaded connection to said threaded outlet of said container, and a passageway for fluid communication between said second arm surface opening and said container;
• a fastener having a shank with a thumbscrew at one end and threads at the other end, said shank extending through said bores and threadingly engaging the one of said bores farthest from said thumbscrew, said one bore being threaded;
• and
• an inner annular seal and an outer annular seal;
• wherein one of said surfaces is provided with three concentric annular grooves spaced radially from each other and from the bore of said one surface, the middle annular groove being in fluid communication with said surface openings;
• wherein said inner annular seal is positioned in the inner annular groove and said outer annular seal is positioned in the outer annular groove;
• wherein, when in a rotation-resisting mode, said thumbscrew of said fastener is turned clockwise to force said surfaces of said arms toward one another to increase friction between said surfaces and resist rotation therebetween, when in a rotation-permitting mode, said thumbscrew of said fastener is turned counterclockwise to decrease friction between said surfaces and permit rotation therebetween.