Self closing filter centerpost
US5846417A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1997 |
| Grant date | Dec 8, 1998 |
| Priority date | — |
| Expiry date | Jul 21, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M37/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A self-closing centerpost for a fluid filter includes a centerpost body which is constructed and arranged with a hollow interior so as to provide a fluid passageway. The fluid filter is designed for fuel and the hollow centerpost body includes an outer wall which defines a pair of flow apertures. These flow apertures are in flow communication with the fluid passageway in order to deliver fluid to the outlet port of the fluid filter. A control valve is positioned within the hollow interior and is designed with a pair of oppositely-disposed blocking portions which are disposed over the flow apertures when the flow control valve is in its normally closed (spring-biased) condition. In this closed condition, fuel is unable to enter the hollow centerpost body and is thus unable to be delivered to the engine. A biasing spring maintains the flow control valve in this closed condition until such time as a filtering element is installed at which point the endplate of the filtering element is used as the means to push down on a plunger portion of the flow control valve. Once the spring biasing force is exceeded by downward movement of the control valve, the blocking portions move away from th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.