Abstract: A valve is provided and includes a bypass block defining a bypass flowpath fluidly communicable with main flowpaths, a member disposable within the bypass block to occupy and move between first and second positions, the member being configured to permit fluid flow through the bypass flowpath when occupying the first position and to block a portion of the bypass flowpath to thereby prevent fluid flow through the bypass flowpath when occupying the second position and an elastic element. The elastic element is coupled to the member and configured to bias the member in a biasing direction toward the second position responsive to a temperature of fluid flowing along the main flowpaths.

Abstract: A curved cross-flow heat exchanger including a first flow path for a first fluid stream which is arranged substantially at right angles to a second flow path for a second fluid stream, wherein: the first flow path is confined within one or more heat exchanger sections that bridge between opposite sides of the heat exchanger, the one or more heat exchanger sections having a leading edge positioned in the second flow path, wherein each of the one or more heat exchanger sections is a curved laminated heat exchanger section and comprises a leading edge that is curved in a direction normal to the second flow path.

Abstract: A valve includes an outer structure. The valve includes a hollow shaft that includes holes formed therein, the shaft disposed within the outer structure and translatable from a first position to a second position. A memory metal alloy (MMA) spring is coupled to the shaft and the outer structure, the MMA spring expanding and moving the shaft from the first position to the second position in response to a temperature of a fluid. A valve head is coupled to the shaft and adapted to be biased within the outer structure, the valve head closing a bypass inlet in the first position and allowing fluid to enter the bypass inlet in the second position, and transferring fluid from the bypass inlet into the hollow shaft so that the fluid can exit the valve via an outlet. A pressure relief mechanism may be included.

Abstract: A curved cross-flow heat exchanger including a first flow path for a first fluid stream which is arranged substantially at right angles to a second flow path for a second fluid stream, wherein: the first flow path is confined within one or more heat exchanger sections that bridge between opposite sides of the heat exchanger, the one or more heat exchanger sections having a leading edge positioned in the second flow path, wherein each of the one or more heat exchanger sections is a curved laminated heat exchanger section and comprises a leading edge that is curved in a direction normal to the second flow path.

Abstract: A valve includes a housing and a valve seat and a structure fixedly disposed remote from the valve seat, a valve head to open and close the valve seat, fluid being permitted to flow when the valve seat is open and an elastic system anchored on the structure and coupled to the valve head, the elastic system including a biasing element and an elastic element formed of memory metal alloy disposed to contact fluid permitted to flow, the biasing element and the elastic element being configured to cooperatively move the valve head toward a valve seat open position when a fluid temperature is below a lower limit, and the biasing element and the elastic element being further configured to cooperatively move the valve head toward a valve seat closed position in opposition to the biasing element when the fluid temperature is above an upper limit.

Abstract: A valve is provided and includes a bypass block defining a bypass flowpath fluidly communicable with main flowpaths, a member disposable within the bypass block to occupy and move between first and second positions, the member being configured to permit fluid flow through the bypass flowpath when occupying the first position and to block a portion of the bypass flowpath to thereby prevent fluid flow through the bypass flowpath when occupying the second position and an elastic element. The elastic element is coupled to the member and configured to bias the member in a biasing direction toward the second position responsive to a temperature of fluid flowing along the main flowpaths.

Abstract: A valve may include an outer structure. The valve may include a hollow shaft that includes holes formed therein, the shaft disposed within the outer structure and translatable from a first position to a second position. A memory metal alloy (MMA) spring may be coupled to the shaft and the outer structure, the MMA spring expanding and moving the shaft from the first position to the second position in response to a temperature of a fluid. A valve head may be coupled to the shaft and adapted to be biased within the outer structure, the valve head closing a bypass inlet in the first position and allowing fluid to enter the bypass inlet in the second position, and transferring fluid from the bypass inlet into the hollow shaft so that the fluid can exit the valve via an outlet. A pressure relief mechanism may be included.

Abstract: A valve includes a housing and a valve seat and a structure fixedly disposed remote from the valve seat, a valve head to open and close the valve seat, fluid being permitted to flow when the valve seat is open and an elastic system anchored on the structure and coupled to the valve head, the elastic system including a biasing element and an elastic element formed of memory metal alloy disposed to contact fluid permitted to flow, the biasing element and the elastic element being configured to cooperatively move the valve head toward a valve seat open position when a fluid temperature is below a lower limit, and the biasing element and the elastic element being further configured to cooperatively move the valve head toward a valve seat closed position in opposition to the biasing element when the fluid temperature is above an upper limit.