Liquid filter with a drain for residual liquid
US6485637B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2000 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Dec 21, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/4084
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A liquid filter, suitable for the lubricating oil of an internal combustion engine, having a cartridge installation opening 15 which faces substantially downward, a positively guided oil drain 28 is proposed for draining oil from the filter when the filter cartridge is changed. The positive guidance is effected by a valve stem 29 which is connected directly or indirectly to the housing by a support tube 22. It opens a gasketed drain opening which can be connected to a hose 35 in order to assure drainage of oil, for example, to a separate oil collecting vessel. The drain opening is automatically opened by unscrewing the screw-on cover 11. No other drain plug or the like needs to be opened. This filter is especially suited for installation in confined spaces since the oil can be drained in a reliable manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.