Leakproof adhesive sealing

Claim 1

Apparatus for exchanging heat with a pressurized fluid, comprising: a housing with an interior surface, inlet and outlet fluid fittings in a back plate that forms said interior surface, partitioning means inside said housing for forming one or more fluid passages within said housing, said partitioning means having at least one surface facing and spaced from said housing interior surface, said partitioning means surface having a different contour from said housing interior surface, said difference in contours defining a gap between said surfaces, said partitioning means comprising a corrugated heat-conductive sheet mounted in close proximity to said back plate, said corrugated sheet having ends transversely to said corrugations and sides parallel to said corrugations, adhesive filling said gap along an elongated zone to prevent fluid within said housing from leaking through said gap, said adhesive comprising potting material sealing said gap which is between said corrugated sheet and said back plate near said ends of said corrugated sheet, two elongated openings in said housing along said zone for introducing said adhesive, each said opening being in said back plate and extending transversely to said corrugations and located near said ends of said corrugated sheet, said openings providing a path for introducing said potting material pured therein to seal in a pair of zones between said corrugated sheet and said housing and thereby provide a fluid compartment between said zones, and first rows of fingers extending from said back plate along one long side of each of said narrow openings and being received in corrugations of said corrugated sheet, thereby retarding the flow of potting material past the position of said fingers and reducing the size of the zones to be sealed by said material between said corrugated sheet and said back plate.