Aerosol container and valve assembly for automatically signalling depletion of a predetermined amount of the container contents when in an inverted position
US4572406A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1983 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Mar 7, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D83/32
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Disclosed herein is an improved aerosol assembly which may be used inverted and upright and which, when used in the inverted position, will automatically provide an audible signal that a predetermined amount of the container contents has been depleted. A valve body defining a hollow interior and a base has a hollow diptube operatively connected to the valve body interior and reaching at its lower end to the bottom of an associated aerosol container. A moveable valve stem is provided for placing the valve body interior in communication with the exterior of the aerosol container. A liquid level spray control is provided and defines a control opening positioned between the valve body base and the diptube lower end. The opening is positioned no closer to the valve body base than 20% of the distance between the base and the diptube lower end and no farther from the base than 80% of the distance between the base and the diptube lower end. The control opening is in open flow communication with the valve body interior when the aerosol container and associated valve assembly are in their inverted position. A valve having a ball for automatically sealing the control opening from communicatio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.