Quick attaching fluid head

This application claims the benefit of U.S. Application Ser. No. 61/053,430 filed May 15, 2008, the contents of which are hereby incorporated by reference.

Background Art

Spray guns for application of fast setting materials such as polyurethanes and polyureas are well known. Because these materials set up so fast, it is important that the gun or applicator be easily disassembled with a minimum of tools for cleaning.

An object of this invention is to develop a simple method of attaching the high-pressure fluid section to lower pressure air section (handle). The fluid section can be easily assembled/removed from the air section by turning the fluid head ⅛ of a turn. The fluid head has four tabs that protrude and engage with four undercut features within the handle. Machined features in the air section (handle) prevent the fluid head from over rotating during assembly/removal by limiting rotation to ⅛ of a turn. When fully assembled, a locking tab feature in the hose manifold mates to a recess feature in the handle to prevent the fluid section from rotating. This construction uses fewer parts and is easy to assemble and remove.

These and other objects and advantages of the invention will appear more fully from the following description made in conjunction with the accompanying drawings wherein like reference characters refer to the same or similar parts throughout the several views.

FIG. 1 shows an exploded view of the fluid head relative to the air section.

FIG. 2 shows the fluid head during the first stage of assembly to a portion of the air section.

FIG. 3 shows the fluid head during the next stage of assembly to a portion of the air section.

FIG. 4 shows the fluid head assembled to the air section with the hose manifold.

The fluid section or head 10 of the instant invention can be easily assembled or removed from the handle/air section 12 by turning the fluid head ⅛ of a turn. The fluid head 10 has four tabs 14 that protrude and engage with four undercut features 16 within the handle 12 (see FIG. 1 ). FIG. 2 shows tabs 14 being inserted through corresponding openings 16 in the front 12 a of air section 12 while FIG. 3 shows air section 12 having been rotated such that tabs 14 are retained behind lips 18 . Machined features in the air section (handle) 12 prevent the fluid head 10 from over rotating during assembly or removal limiting rotation to ⅛ of a turn.

To finish assembly, a locking tab feature 20 in the hose manifold 24 mates to a recess feature 22 in the handle 12 to prevent the fluid section 10 from rotating (see FIG. 4 ). The hose manifold 24 is secured to fluid section 12 by means of a bolt or other known fastener 26 . Once this is tightened, the manifold 24 , fluid section 10 and handle 12 are all fixed relative to each other. Disassembly is, of course, the opposite of assembly. Bolt 26 is removed which allows hose manifold to be removed from the fluid section 10 . This in turn allows fluid section 10 to be rotated ⅛ of a turn and separated from the handle.

It is contemplated that various changes and modifications may be made to the quick attaching fluid head without departing from the spirit and scope of the invention as defined by the following claims.