AEROSOL-TYPE DISPENSER FOR DISPENSING A POWDERED MATERIAL

• US 3,625,403 A
• Filed: 04/04/1969
• Issued: 12/07/1971
• Est. Priority Date: 04/05/1968
• Status: Expired due to Term

• Current Assignee: Felix Rousselot
• Original Assignee: Felix Rousselot
• Inventors: Rousselot, Felix
• Primary Examiner(s): Coleman, Samuel F.
• Application Number:
  US04/813,642
• Time in Patent Office: 977 Days
• Field of Search: 222/193 239/307,345,346 169/32
• US Class Current: 222/635
• CPC Class Codes: B05B 7/1413 Apparatus to be carried on or by a person, e.g. by hand; Apparatus comprising a container fixed to the discharge device

Abstract

An aerosol-type dispenser for dispensing a powdered material. The dispenser has a propellant container, valve means operatively associated with said propellant container for controlling release of propellant from said propellant container, and a productcontaining chamber for containing the powdered material to be dispensed. A fluidization chamber is mounted on one end of said product-containing chamber and said product-containing chamber opens into it. The propellant container is mounted on said fluidization chamber and said valve means discharges into said fluidization chamber. The fluidization chamber has an outlet orifice therein, the propellant container is mounted on said fluidization chamber with the axis thereof at an oblique angle to the axis of said product-containing chamber, whereby when the dispenser is held with the product-containing chamber above the propellant-containing container, the powdered material is fed to the fluidization chamber by gravity.

Claims

1. A hand-held powder dispenser comprising a propellant container for holding a propellant gas liquefied at a pressure above atmospheric, a powder container for holding a powder to be dispensed in a spray and having a bottom surface on which the dispenser stands when not being hand held in an inverted position for dispensing a turbulence chamber connected between the top of the powder container remote from the bottom surface and the propellant container, said powder container and said turbulence chamber having an opening therebetween and the internal surfaces of the walls of the powder container adjacent said opening having a shape for causing powder to flow through the opening into said turbulence chamber in the form of a cone with the apex within the turbulence chamber a valve-controlled propellant gas flow tube being directed into said turbulence chamber in a direction to flow laterally across the opening between the powder container and the turbulence chamber for fluidizing the powder in the cone of powder falling into the fluidizing chamber, the axis of the gas flow tube intersecting the axis of the cone formed by the powder dropping into said turbulence chamber in an obtuse angle, said turbulence chamber having an outlet for the powder and propellant positioned laterally of said opening between said powder container and said turbulence chamber, and trigger means operatively associated with said valve means for controlling the flow of gaseous propellant from said propellant container, whereby only when the Dispenser is inverted can powder flow from the powder container into the turbulence chamber in a cone to be mixed with the propellant from the propellant container released by actuation of said trigger means.

2. A powder dispenser as claimed in claim 1 wherein said angle is about 135*.

3. A powder dispenser as claimed in claim 1 wherein said turbulence chamber has a curved wall curving from a position generally in alignment with said gas flow tube to a direction across said opening between said powder container and said turbulence chamber.

4. A powder dispenser as claimed in claim 1 further comprising a hollow handle attached to said turbulence chamber and extending obliquely to the axis of the powder container.

5. A powder dispenser as claimed in claim 4 in which said propellant container is positioned inside said hollow handle.

6. A powder dispenser as claimed in claim 1 in which said turbulence chamber has a generally pointed extension therein in which said outlet is positioned.

7. A powder dispenser as claimed in claim 1 wherein said turbulence chamber is a hollow truncated right circular cylinder with the powder container connected to the base thereof.

8. A powder dispenser as claimed in claim 1 wherein said trigger means comprises a trigger, lever means on which said trigger is mounted and pivoted in said turbulence chamber adjacent said valve means and being engaged with said valve means for moving said valve means by movement of the trigger to move said lever means.

9. A powder dispenser as claimed in claim 8 further comprising a slider slidable along the wall of said turbulence chamber over said outlet and engaged by said lever means to be moved to uncover said opening when said trigger is actuated to open said valve means.

10. A powder dispenser as claimed in claim 8 wherein said gas flow tube is mounted on said lever means and is integral therewith.

11. A powder dispenser as claimed in claim 8 further comprising spring means engaged with said lever means urging said lever means to the valve-closed position.

12. A powder dispenser as claimed in claim 1 wherein said opening between said powder container and said turbulence chamber has an area of from 2 to 30 cm.2 and said propellant container has a volume of about 300 ml.

13. A hand-held powder dispenser comprising a propellant container for holding a propellant gas liquefied at a pressure above atmospheric, a powder container for holding a powder to be dispensed in a spray and having a bottom surface on which the dispenser stands when not being hand held in an inverted position for dispensing a turbulence chamber connected between the top of the powder container remote from the bottom surface and the propellant container, said powder container and said turbulence chamber having an opening therebetween and the internal surfaces of the walls of the powder container adjacent said opening having a shape for causing powder to flow through the opening into said turbulence chamber in the form of a cone with the apex within the turbulence chamber, valve means on said propellant container including a gas flow tube directed into said turbulence chamber for directing a flow of gas from said propellant container into said turbulence chamber for fluidizing the powder flowing into the turbulence chamber, said turbulence chamber having an outlet for the powder and propellant positioned laterally of said opening between said powder container and said turbulence chamber, the portion of said turbulence chamber adjacent to the powder container and into which the opening between the powder container and the turbulence chamber opens being generally bulb-shaped, and the part of the turbulence chamber having said outlet therein being on the side of the turbulence chamber remote from the powder container, said gas flow tube extending into said bulb-shaped portion of the turbulence chamber and being directed generally along the wall of the bulb-shaped portIon adjacent the portion thereof nearest the outlet, and trigger means operatively associated with said valve means for controlling the flow of gaseous propellant from said propellant container, whereby only when the dispenser is inverted can powder flow from the powder container into the turbulence chamber in a cone to be mixed with the propellant from the propellant container released by actuation of said trigger means.