Shut-off valve apparatus
US4077876A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Oct 21, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/153
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a shut-off valve assembly for use with a filter carriage where the upper portion of the filter cartridge cooperates with the valve assembly for controlling fluid flowing into and out of the inlet and outlet port of the cartridge once the cartridge is removed from service. Cartridge removal causes the shut-off valve to automatically close fluid flow into and out of the cartridge. A valve abutment member in the shut-off assembly serves to shut off fluid inlet flow and a sealing member on a support member of assembly, serves to seal the shut-off assembly at the fluid inlet port. A ball check mounted in a retainer of assembly is biased in the downward direction during fluid shut-off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.