Chassis for aerosol dispenser aerosol dispenser having a chassis and preform chassis for an aerosol dispenser

An aerosol dispenser having a longitudinal axis and comprising:

• an outer container comprising a closed end bottom and an open neck longitudinally opposed thereto, said open neck comprising:
• a valve attachment having a valve attachment diameter,
• a first surface disposed below said valve attachment and having a first surface diameter less than said valve attachment diameter,
• a second surface disposed interior to said first surface and having a second surface diameter less than said first surface diameter, and
• an annular seal bead between said first surface and said second surface;
• a valve attached to said valve attachment and being operable to dispense product from the aerosol dispenser, said valve being sealed against one of said first surface and said second surface;
• a product delivery device disposed within said outer container and substantially disposed below said valve, said product delivery device being sealed to one of said first surface and said second surface and being in fluid communication with said valve, one of said first surface and said second surface being a sealing surface to sealingly prevent escape of propellant from said outer container to ambient or to said product delivery device when a valve is attached to said valve attachment;
• and
• an actuator operably connected to said valve for selectively dispensing product from said aerosol dispenser upon demand,
• whereby said product delivery device complementary to said second surface can be disposed thereon and not longitudinally interfere with said valve attached to said valve attachment,
• wherein said valve attachment, first surface and said second surface are integral with each other.

A preform having a longitudinal axis and being usable, upon blow molding, as an outer container for a pressurized aerosol dispenser, said preform comprising:

• a closed end bottom and an open neck longitudinally opposed thereto, said open neck having
• a valve attachment having a valve attachment diameter,
• a first surface disposed below said valve attachment and having a first surface diameter less than said valve attachment diameter,
• a second surface disposed below said first surface and having a second surface diameter less than said first surface diameter, one of said first surface and said second surface being a sealing surface to prevent escape of propellant from said outer container to ambient or to said product delivery device when a valve is attached to said valve attachment,
• an annular seal bead disposed between said first surface and said second surface,
• a transition distinguishing said first surface from said second surface,
• whereby a component complementary to said second surface can be disposed thereon and not interfere with a valve operable by a user when said valve is attached to said valve attachment.