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US 4,546,822 AGranted
Heat exchanger with adhesive seals
AssigneeNippondenso Co., Ltd.
InventorMasami Tamura
Life of this patent
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AssigneeNippondenso Co., Ltd.
InventorMasami Tamura
Estimating the term…
A solderless type automotive engine radiator has upper and lower tanks and a heat exchanger core connected at the upper and lower ends to the tanks through upper and lower header plates. The core is formed by tubes and fins secured to the tubes without soldering. The upper and lower ends of the tubes are in gripping engagement with inner peripheral surfaces of holes formed in the header plates. Layers of adhesive are formed on the surfaces of the header plates adjacent to the core to form liquid-tight seals between the header plates and the tubes. The adhesive layers and the fins are arranged such that at least the fin nearest to an adjacent adhesive layer is either in face-to-face engagement with the adjacent adhesive layer or embedded in the adjacent adhesive layer to strengthen the adhesive layer and protect the same against foreign materials such as water and dirt whereby the durability of the seals is improved.
A heat exchanger comprising a tank for momentarily storing a heat-transfer medium, said tank having a peripheral edge defining an opening, a header plate formed therein with a plurality of holes and sealingly secured to said peripheral edge of said tank to close said opening, a plurality of tubes each mechanically connected to one of said holes in said header plate so that said medium can flow through said tubes into and from said tank, said tubes and said header plate being in metal-to-metal gripping engagement with each other, a row of a plurality of fins disposed in heat-exchanging relationship to said tubes and extending substantially parallel to said header plate, and a layer of adhesive disposed on the surface of said header plate adjacent to said row of fins and forming a seal between said header plate and said tubes, said adhesive layer and said row of fins being arranged such that at least the fin which is nearest to said header plate is in engagement with said adhesive layer.
An automotive radiator comprising a heat exchanger including;
Dependencies are inferred from the claim text.