Filter device with magnetic filter clamp
US4468321A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1983 |
| Grant date | Aug 28, 1984 |
| Priority date | — |
| Expiry date | Feb 17, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The filter device is for filtering liquids and has a reservoir member for receiving the liquid to be filtered and a spout member for exit of the liquid after it is filtered, the spout member being assembled to the reservoir member with a filter disc therebetween. Each of these members has an annular ceramic magnet, these ceramic magnets being adjacent each other when the members are assembled whereby the magnetic attraction sealingly clamps the filter disc between the members. In accordance with the invention, the annular ceramic magnet of the reservoir member is completely enclosed within a closed annular cavity in the organic plastic of the reservoir member, the annular magnet being of smaller size than the annular cavity; and the annular ceramic magnet of the spout member is completely enclosed within a closed annular cavity in the organic plastic of the spout member, this annular magnet also being of smaller size than the annular cavity in which it is enclosed. Hence, the ceramic magnets are protected by the organic plastic against chipping, cracking, corrosion or like deterioration but because they are of smaller size than the cavities there is room for expansion, without crea…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.