Spiral filter element
US5152892A · kind A · utility
20Cited by
11References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 21, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | May 21, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49602
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter element generally indicated at 10 comprising a spring 11 whose coils are so formed that the filter gaps 12 progressively increase in size from one end 13 of the coil to the other end 14. The increase in the size of the gaps is carefully chosen so that the available deflection for any coil section, when the spring is vertically orientated, is sufficient to develop an upward force which can support the coils in the spring 11 which extend above that particular coil section. Similar results can be achieved by varying the resilience or stiffness characteristics through the filter element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.