Title:
OIL FILTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/176497
Kind Code:
A1
Abstract:
This oil filter device comprises: a filter case; a filter element disposed in a main flow passage provided to an inner space of the filter case; a conductive valve body disposed in a bypass flow passage provided to the inner space; a conductive valve shaft supported by the valve body with a valve insulating member therebetween; a conductive valve disk which is movably supported by the valve shaft and makes contact with the valve body, thereby closing the bypass flow passage; a valve elastic member which generates an elastic force so that the valve disk makes contact with the valve body; a conductive movable member which is connected to the valve body, makes contact with the valve disk while the valve disk is in contact with the valve body, and is separated from the valve disk after the valve disk is separated from the valve body; and a controller which supplies a current to the valve disk through the valve shaft and determines, on the basis of the conduction state between the valve disk and the valve body, whether the bypass flow passage is closed.
Inventors:
KAGEYAMA MASATO (JP)
SETO SHOUTA (JP)
SETO SHOUTA (JP)
Application Number:
PCT/JP2023/007961
Publication Date:
September 21, 2023
Filing Date:
March 03, 2023
Export Citation:
Assignee:
KOMATSU MFG CO LTD (JP)
International Classes:
F15B21/041; B01D35/02; B01D35/147
Domestic Patent References:
| WO2017191852A1 | 2017-11-09 |
Foreign References:
| JP2009519397A | 2009-05-14 | |||
| JP2017006831A | 2017-01-12 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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