Patent ID: 6793155
Filing Date: 2004-09-21
Classification: B05B

Abstract:
A spray gun with pressure stabilization comprising:a spray gun body having an outlet portion with a recess and a first wind hole formed therein, said recess having a threaded hole and a first de-pressure hole formed therein; a de-pressure ring abutting said outlet portion of said spray gun body, said de-pressure ring having (a) a central trough opening in open communication with said threaded hole and said first de-pressure hole, (b) a plurality of second de-pressure holes surrounding said central through opening and being in fluid communication with said first wind hole, and (c) a flange circumscribing said central through opening and extending therefrom into said recess; a nozzle having a longitudinally extended hollow pipe having a first end portion extending through said central through opening of said de-pressure ring with a first end of said nozzle being in fluid communication with said threaded hole of said recess, said nozzle having an opposing second end portion with an annular block rim coupled thereto, said nozzle having a circular rim abutting said dc-pressure ring and having a plurality of air holes formed therethrough and being in fluid communication with said first de-pressure hole; and, a spray head coupled to said outlet portion of said spray gun body and having a spray hole receiving a second end of said nozzle therein, said spray head having an annular central portion extending therefrom and abutting said circular rim of said de-pressure ring to define a first air flow channel internal to said annular central portion and in fluid communication with said air holes of said de-pressure ring and a second air flow channel external to said annular central portion and in fluid communication with said second dc-pressure holes of said de-pressure ring, said spray head having a plurality of air outlets surrounding said spray hole and in fluid communication with said first air flow channel, said spray head having a plurality of second wind holes spaced from said spray hole and in fluid communication with said second air flow channel, said annular block rim of said nozzle being disposed in said first air channel and being spaced from an inner wall of said spray head to define an air flow restriction for providing an air pressure drop thereacross.