One-piece mechanical break up (MBU)

In a one-piece integral molded valve actuator for a pressurized aerosol dispenser, said actuator having means to mount the actuator on the valve of the dispenser in communication with the product discharge passage of the valve, a generally circular swirl chamber molded within the actuator, a passage molded within the actuator in communication with the valve discharge passage and extending to an entrance aperture of the swirl chamber, the entrance aperture being located to introduce product circumferentially of the swirl chamber, the swirl chamber having a front wall with a discharge orifice extending from the front wall of the swirl chamber to the front exterior of the actuator, and a rear wall normal to the central axis of the swirl chamber, the improvement which comprises a sloped mound on the rear wall protruding into the swirl chamber centrally thereof, and the discharge orifice being located off-center of the swirl chamber axis and remote from the entrance aperture.