Foaming device
US4219532A · kind A · utility
5Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1978 |
| Grant date | Aug 26, 1980 |
| Priority date | — |
| Expiry date | Oct 10, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87595
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A foaming device including a housing with a cylindrical passage therethrough and four housing ports which provide communication between exterior and interior of the housing, the housing ports being connected to sources of fluids; a cylindrical spool slidably disposed within the housing provided with an axial passage therethrough and three spool ports in communication with the spool passage; the spool being displaceable to on, off and cleaning positions in a way that one has to go through the cleaning position when displacing the spool from the on to off position or vice versa.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.