Patent ID: 6241165
Filing Date: 2001-06-05
Classification: B05B

Abstract:
Spray nozzle having:a hollow nozzle body (1) with a peripheral external wall (2) having a longitudinal axis (I--I) and a radial anterior external wall (3) incorporating an axial outlet hole (4),a central swirl chamber (9) delimited by a peripheral wall (10) with a shape of revolution about the longitudinal axis (I--I), an anterior wall (11) incorporating a coaxial outlet passage (12) smaller than the axial outlet hole (4), and a posterior wall (13),at least one lateral fluid inlet passage (14) in the peripheral wall (10), opening into the central swirl chamber (9) and shaped to inject the fluid tangentially into the central swirl chamber (9),an anterior plate (15) fastened into the hollow nozzle body (1) and bearing against the radial anterior external wall (3), incorporating posterior openings and grooves forming the peripheral (10) and anterior (11) walls at least of the central swirl chamber (9), the coaxial outlet passage (12), and said at least one lateral fluid inlet passage (14), anda posterior core (5) fitted into the hollow nozzle body (1), and having peripheral fluid feed passages (6, 7), and an anterior face (16) pushing said at least one attached anterior plate (15) towards said radial anterior external wall (3) of the hollow nozzle body (1),wherein :the posterior core (5) comprises a posterior core body (5a), retained in the hollow nozzle body (1) by fixing means, and a posterior plate (5b) held in position by the posterior core body (5a) and bearing axially against the anterior plate (15) to form the posterior wall (13) of the central swirl chamber (9) and to delimit said at least one fluid inlet passage (14) towards the rear,the anterior (15) and posterior (5b) plates are provided with relative centering means for centering the plates (15, 5b) relative to each other about the longitudinal axis (I--I),the posterior plate (5b) comprises, along the longitudinal axis (I--I), a posterior recess (17) with a smaller cross section than the central swirl chamber (9),at least one of the anterior (15) and posterior (5b) plates is mounted with radial clearance in the hollow nozzle body.