Piston aerosol dispenser

Patent metadata

Field	Value
Publication number	US-2016368700-A1
Application number	US-201514742771-A
Country	US
Kind code	A1
Filing date	Jun 18, 2015
Priority date	Jun 18, 2015
Publication date	Dec 22, 2016
Grant date	—

Abstract

An outer container for an aerosol dispenser and an aerosol dispenser usable with the outer container. The outer container comprises an upper container portion and lower container portion joined at a seal. A piston slideably disposed in the outer container dispenses product under propellant pressure. The lower container portion has a base and integral sidewall with no bung hole, eliminating leakage paths.

First claim

1 . An outer container defining an outer container volume therein, and being suitable for an aerosol dispenser having a longitudinal axis, said outer container comprising:
a lower container portion with a closed end bottom terminating at a base disposed at a first end, said lower container portion bottom not having a bung hole therethrough; and an upper container portion having an open neck at a second end, said upper container portion and said lower container portion being sealably joined together.

2 . An outer container according to claim 1 further comprising a valve assembly disposed in said neck for selectively dispensing product from said aerosol dispenser.

3 . An outer container according to claim 2 wherein said upper container portion and said lower container portion both comprise plastic.

4 . An outer container according to claim 3 wherein said upper container portion and said lower container portion are joined by a welded seal.

5 . An outer container according to claim 4 wherein said upper container portion and said lower container portion have a substantially constant cross section.

6 . An outer container according to claim 5 wherein said upper container portion does not have a tapered shoulder.

7 . An outer container according to claim 2 wherein said lower container portion comprises a base and sidewall integral therewith.

8 . An outer container according to claim 7 further comprising a piston congruent to and mounted for axial movement within said outer container.

9 . An outer container suitable for an aerosol dispenser and having a longitudinal axis, said outer container comprising:
a lower container portion with a closed end bottom terminating at a base disposed at a first end, said closed end bottom not having a bung hole therethrough; a domed upper container portion having an open neck at a second end, said upper container portion and said lower container portion being sealably joined together, and further comprising a piston mounted for axial movement within said outer container.

10 . An outer container according to claim 9 wherein said piston comprises a top and skirt depending therefrom, said top of said piston being congruent with said dome of said upper container portion.

11 . An outer container according to claim 10 wherein said upper container portion has an axial length and said skirt of said piston has an axial length less than or equal to said axial length of said upper container portion.

12 . An outer container according to claim 11 wherein said top of said piston is concave upwards and adapted to fit a valve cup.

13 . An outer container according to claim 12 wherein said piston has a bottom opposed to said top, and said bottom of said piston is has an annular ring for containing propellant therein at the start of dispensing.

14 . A round outer container according to claim 9 further comprising a screw joined to and extending upwardly from said base; and wherein said said piston is a round piston having a threaded hole therethrough and is mounted on said screw for simultaneous rotational and axial movement within said outer container.

15 . An aerosol dispenser having a longitudinal axis, said aerosol dispenser comprising:
a polymeric lower container portion with a closed end bottom at a first end, said closed end bottom not having a bung hole therethrough and comprising a base and sidewall integral therewith; a polymeric upper container portion having an open neck at a second end; said upper container portion and said lower container portion being sealably joined together; a valve assembly disposed in said neck for selectively dispensing product from said aerosol dispenser; and a piston congruent to and mounted for axial movement from said lower container portion to said upper container portion.

16 . An aerosol dispenser according to claim 15 wherein said outer container has a longitudinal dimension defining an axial length, said seal being disposed in the upper 50% of said longitudinal length.

17 . An aerosol dispenser according to claim 16 wherein said seal comprises a circumferential flange.

18 . An aerosol dispenser according to claim 17 wherein said seal comprises a welded seal.

19 . An aerosol dispenser according to claim 15 wherein said piston has a top and a skirt, said skirt having an axial skirt length, and said upper container portion has an upper container axial length which is equal to or greater than said llskirtll axial skirt length.

20 . An aerosol dispenser according to claim 15 further comprising propellant and product, said propellant being disposed between said piston and said base, said product being disposed between said piston and said neck.

Assignees

• Procter & Gamble

Inventors

• Smith Scott Edward
• Franckhauser Andrew William
• Benson William Mercer
• Bartolucci Stefano

Classifications

• B65D83/38

  Details of the container body (pressure relief devices B65D83/70) · CPC title

• B65D83/48

  Lift valves, e.g. operated by push action (non-reclosable valves B65D83/50) · CPC title

• B65D83/64 Primary

  by pistons · CPC title