Oil filter assembly
US6790356B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Mar 15, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An oil filter assembly comprising: an oil filter housing defining an oil filter chamber adapted to receive an oil filter element, the oil filter housing also defining a port; and a valve assembly received within the port, the valve assembly having a closed position and an open position for draining the chamber of oil associated with the oil filter element, the valve assembly comprising a spring, a valve and a casing disposed about the spring and the plunger. The casing may include a substantially annular lip retaining the valve in engagement with the casing. The casing defines a casing chamber and the lip retaining a collar of the valve within the casing chamber. The lip also may define a hole for receiving the stem or, in accordance with an alternative embodiment, for receiving a post or the like associated with the oil filter element. A method is also provided of producing an oil filter assembly having a housing defining an oil filter chamber adapted to receive an oil filter element. The method comprises the steps of: disposing a casing about a spring and a valve; forming a lip on a leading edge of the casing for retaining the valve in engagement with the casing; and inserting th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.