Shut-off valve for spin-on filters
US5362390A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Jun 28, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/17
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A shut-off valve for a spin-on filter includes a generally cylindrical outer housing which has an open top surface and an annular spring channel formed in that top surface for receipt of a coil spring. The spring is positioned so as to act on a valve actuator and gasket combination which are moveable relative to a valve seat for opening and closing the shut-off valve. In the normally closed condition the spring exerts a spring biasing force on the upper portion of the valve actuator which pushes it against the gasket and pushes the gasket against the outer sealing ridge of the valve seat. In this condition any liquid flowing into the top center opening of the housing will not be allowed to pass through the lowered centered opening of the valve seat. However, when the spin-on filter which includes the shut-off valve is spun onto a mounting base a stem on that mounting base pushes upwardly on the valve actuator compressing the spring and creating a liquid flow path between the gasket and the valve seat. The shut-off valve is completely self-contained within the spin-on filter and as the filter is removed from the mounting base the shut-off valve simultaneously closes so as to trap an…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.