Container for foamy liquid discharged in small amounts
US4932567A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Feb 17, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1098
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A container in which air and a foamable liquid are passed through porous gas/liquid mixing members at which the foamable liquid and air are mixed together to be foamed so that the foam of the foaming liquid may be discharged from the container. The gas/liquid mixing members are porous films of which one is disposed at the bottom of a cylinder and at least two are disposed in a hollow piston inclusive of a hollow piston rod at predetermined spacing. A check valve is provided at the bottom of the cylinder. A liquid passage hole in communication with a downwardly extending liquid passage pipe is provided. A gas passage hole opens to a junction of the liquid passage pipe and liquid passage hole to form a gas/liquid mixing portion, and a second check valve is provided in the piston rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.