Patent ID: 8905244
Filing Date: 2014-12-09
Classification: B01D,F16K

Abstract:
1. An oil filter interposed in an oil passage and configured to perform filtering of oil by causing the oil to pass through a passage hole of a filter body formed with a diameter needed to provide a desired filter function and made of metal and consisting of a single layer, wherein a plurality of recessed areas, each having a same size and being uniformly distributed in the filter body, are formed by performing a half etching to a half of plate thickness of the filter body on one surface of the filter body, and a plurality of the passage holes are formed by performing an etching in each of the recessed areas on the other surface of the filter body such that the passage holes pass through a corresponding one of the recessed areas, and the passage holes formed in the respective recessed areas are same in size, form, and distribution.