Abstract: A three fluid heat exchanger in which first (fuel) and second (oil) fluids are in a normally flowing heat transfer relation, with flow of a third fluid (compressor bleed air) being dependent on a changing condition of one of the first or second fluids. Tubular heat exchanger cores are comprised in a unitary body with one being perpendicular to the other for space conservation and to simplify fluid flow patterns. The described one core is in the path of flow of one of the first or second fluids and provides a flow path for the third fluid. A valve influenced by a changing pressure condition of one of the first and second fluids controls flow of the third fluid.

Abstract: A three fluid heat exchanger in which first and second fluids are in a normally flowing heat transfer relation, with flow of a third fluid being dependent on a changing condition of one of the first or second fluids. Tubular heat exchanger cores are comprised in a unitary body with one being perpendicular to the other for space conservation and to simplify fluid flow patterns. The described one core is in the path of flow of one of the first or second fluids and provides a flow path for the third fluid. A valve influenced by a changing condition of one of the first and second fluids controls flow of the third fluid.

Abstract: A heat exchanger of the tube and shell type comprising a shell and a shell enclosed tubular core, the core being removable from the shell for inspection and servicing. Motion of the core relative to the shell, and motion of core components relative to one another, is precluded without loss of core access and removability. In one disclosed form of the invention, abutments, at least one of which is part of a detachable closure, limit endwise core motion as well as a relative separating motion of headers which, together with interconnecting tubes, make up a core assembly. At the same time a rigid interponent element limits a relative approaching motion of the headers. In another disclosed form of the invention, headers have a screw threaded connection to parts of the enclosing shell.

Abstract: A tube and shell heat exchanger of a brazeless type. A single header construction mounts tubes made for high efficiency heat transfer and supported for damage free operation. A removable mounting plate confines a tube and header core in a shell and is adapted for free mounting and for controlled inflow and outflow of the tube side and shell side fluids. By-passing flow of shell side fluid within the shell is obviated by a recessed mounting of the header allowing a standard spacing of the tube bundle relatively to shell interior wall surfaces.

Abstract: A method of making a heat exchanger in which extended heat transfer material, such as a fin annulus composed of thin corrugated deformable metal, is installed in annular fluid flow paths defined between concentric tubes. Concepts of electromagnetic forming and metallurgical bonding are used in a unique combination of steps to arrive at a method well suited to economical production and which at the same time assures a high efficiency level of heat transfer and leak protection effects.