| 摘要 |
An oil cooler 11 comprises oil channel members 2A arranged one above another in parallel at a spacing and each composed of a pair of plates 20A, each of the plates 20A having a hole 21 at each of opposite ends thereof and a channel portion 22 between the end holes 21, the pair of plates 20A being joined with recessed surfaces of their channel portions 22 opposed to each other to form the oil channel member 2A; and annular header members 4A each interposed between each pair of adjacent oil channel members 2A at each of opposite lateral ends of the cooler. The header member 4A has upper and lower end faces each comprising a flat portion 41 to be fitted to a flat portion 24 of an edge of each plate 20A defining the end hole thereof and a recessed portion 42 to be fitted to a protuberant face of end 22a of the channel portion 22, each end face of the header member being joined to a peripheral edge portion of the plate 20A immediately adjacent thereto and defining an opening 20 formed by the end hole 21 of the plate and an open end of the channel portion 22 thereof for communication with the header member.
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