Hydraulic fluid filter device
US6605210B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 2002 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | May 17, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/188
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A filter device for filtering hydraulic fluid includes first and second subelements 40, 42 within a filter housing having separate inflows 20, 24 thereto for the respective subelements and a common outflow 22. The first subelement has a higher filter fineness than the second subelement. Several bypass configurations are taught and include: (i) a bypass line 28 for bypassing the second subelement by drawing fluid directly from the supply 95; (ii) a bypass valve 116 (FIG. 3) for bypassing the first subelement; and (iii) a bypass valve 151 (FIG. 5) for connecting the first subelement inflow 20 with the common outflow 22. The device is compact, has an easy-to-service arrangement, and ensures protection of a hydraulic pump and highly stressed hydraulic components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.