Method and apparatus for portable dispensing of foam material
US5318207A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1992 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Apr 20, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29B7/7409
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A pressurized solution of a material with a dissolved gas is maintained and dispensed in a system that allows the material can be dispensed as a foam at any location. The system is portable and avoids the need for a large mixing apparatus at the location The system includes a portable container having a movable member defining an expandable chamber. The chamber is filled the material/gas solution from a pressurized source of solution which may be at another location Force is maintained on the movable member to keep the material/gas solution under pressure. The material/gas solution is maintained under pressure in the container to avoid premature foaming of the solution by the maintaining force on the movable member. The force can be provided in various ways, including the use of a predetermined amount of fluid in the container on the other side of the movable member from the chamber or the use of an external source of pressurized fluid. The material/gas solution is discharged from the container and dispensed using a gun to atmospheric pressure to release the gas and form a foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.