Invention Grant
- Patent Title: Filter and method for filtration of hydraulic oil in a return line to a hydraulic tank, and a drilling rig comprising the filter
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Application No.: US13261246Application Date: 2010-11-03
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Publication No.: US09776110B2Publication Date: 2017-10-03
- Inventor: Anders Nydahl
- Applicant: Anders Nydahl
- Applicant Address: SE Orebro
- Assignee: Atlas Copco Rock Drills AB
- Current Assignee: Atlas Copco Rock Drills AB
- Current Assignee Address: SE Orebro
- Agent Mark P. Stone
- Priority: SE0950893-8 20091124
- International Application: PCT/SE2010/051192 WO 20101103
- International Announcement: WO2011/065891 WO 20110603
- Main IPC: B01D29/11
- IPC: B01D29/11 ; B01D29/60 ; B01D35/143 ; B01D35/147 ; F15B21/04
Abstract:
A filter (5) for a return line (L1, L2) for hydraulic oil to a hydraulic tank (2), which filter (5) has a filter element (11). The filter (5) is arranged to filter the hydraulic oil through the filter element (11) when the hydraulic oil is below a first oil level (H1) in the filter (5), and the filter (5) has an arrangement (15) to cause the hydraulic oil to bypass the filter element (11) when the oil level (H) in the filter (5) exceeds the first oil level (H) without causing any significant back pressure.
Public/Granted literature
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