Canister filter system with drain that cooperates with filter element
US8157997B2 · kind B2 · utility
2Cited by
72References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2007 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Mar 17, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A canister filter system includes a base, a canister attachable to the base, and positioned inside the canister a filter element having filter media. A drain engages and forms a seal with the filter element in a closed position. In an open position, the drain allows fluid to be removed from the canister. Because the drain is engaged to and forms a seal with the filter element in the closed position, the drain cannot be closed unless a filter element is present inside the canister. This prevents accidental or intentional use of the filter system without a filter element in place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.