Apparatus for making post-foaming gels and method
US4980085A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 3, 1989 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | May 3, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F25/53
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus for making post-foaming gels comprising, a piston chamber having an outer case defining a chamber, a piston being slidably received in the case and separating the chamber into a first compartment adjacent one end of the case for retaining a gel base, and a second compartment adjacent the other end of the case for retaining a compressed gas, with said piston having a hollow stem extending out of the other end of the case. The apparatus has a device for circulating the gel base through the stem and first compartment, and a device for introducing a foaming agent to the gel base while it is being circulated through the piston chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.