F - Mech Eng,Light,Heat,Weapons – 28 – F
Patent
F - Mech Eng,Light,Heat,Weapons
28
F
F28F 9/14 (2006.01)
Patent
CA 2167642
A heat exchanger utilizes resilient grommets to seal the tube to the header to prevent leakage. The grommet has a body portion extending around a portion of the tube within the header opening, a radially outwardly extending lip at one end of the body portion, and, when unstressed, a radially inwardly extending lip at the other end of the body portion which contacts the tube. The grommet body portion, when received within the header opening, remains substantially undistorted by the header. The fins are formed in a serpentine pattern such that, within the core body, the root of a bend is secured to a tube and the free end is cut at a root of a bend. The serpentine pattern near the tube ends is compressed to permit the tube ends to extend outward from the core body so that the free ends contact the grommet to limit insertion of the tube ends into the header openings. The header is initially sized such that, when welding the header flanges to the tank, the length of the header decreases so that the spacing of the header openings conforms to the spacing of the tube ends. The header flanges have a minimum height so that the strength of the connection between the flanges and the headercentral portion is unaffected by heat generated during welding.
Ridout & Maybee Llp
Transpro Inc.
LandOfFree
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