Fluid strainer or filter
US4367144A · kind A · utility
11Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 1980 |
| Grant date | Jan 4, 1983 |
| Priority date | — |
| Expiry date | Oct 16, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/153
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to strainers or filters, particularly such oil strainers of the type which have removable filter elements held, against spring bias in a casing. As shown in FIG. 1 the strainer comprises a casing 10 with inlet apertures 11 and outlet apertures 12. Spring biased shutters 17 and 21 are held in their open positions (as illustrated) by the filter element 13 when the closure cap 24 is screwed down. On removal of the filter element 13 the springs 18 and 22 cause shutters 17 and 21 respectively to close the inlet and outlet apertures automatically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.