Abstract: The cooling of a pneumatic tire (12) is provided for by a heat transfer element (21) contained within an inflation chamber (13) and drivingly coupled to the rim (14). The heat transfer element (21) extends away from the rim (14) into a volume of liquid coolant (19) also contained within the inflation chamber (13). Rotation of the rim (14) drives the heat transfer element (21) which transfers portions of the coolant (19) into contact with the rim (14) which conducts the heat away from the coolant fluid (19). A cooling coil (26) mounted about the rim (14) conducts the heat from the rim by the transfer of an additional coolant supply through the cooling coils (26). The efficient elimination of heat prolongs the life of the tire (12) and may increase productivity of earthmoving vehicles or the like which ride upon pneumatic tires (12) as operation of the vehicle need not be restricted in order to reduce heat damage to the tires ( 12).

Abstract: Heat exchangers depend for efficiency upon optimum fluid flow, such as air, through their fins and about tubes extending through the fins. The air flow, particularly at the ends of a heat exchanger, can sometimes be of a significantly reduced amount owing to the construction of, or arrangement of elements in, the heat exchanger. First and second cores (12,14) of a heat exchanger (10) are positioned in a general "V" configuration with their inlet ends (24,42) adjacent one another. Apparatus (64) is provided upstream of the inlet ends (28,46) of the cores (12,14) to direct the air flow in a preselected orientation to inlet surfaces (20,38) of the cores (12,14) at the ends (28,46) of the cores (12,14). Air flow is thus improved over a portion of the heat exchanger (10) to increase its heat transfer efficiency.

Abstract: Heat exchangers depend for efficiency upon maximizing fluid flow, such as air, through their fins about tubes extending through the fins. The air flow, particularly at the ends of a heat exchanger, can sometimes be of a significantly reduced amount owing to flow restrictions caused by the construction of, or arrangement of elements in, a heat exchanger. A core (12) of a heat exchanger (10) of the present invention utilizes a relatively varied angular arrangement for tubes (16) in the core (12) which improves air flow, particularly at the ends (28,40) of the core (12). Air flow is thus improved over a portion of the heat exchanger (10) to increase heat transfer, as well as purging of debris, for the folded or zipzag core arrangement described.

Abstract: The outermost tubes (50) of a heat exchanger core (20) have not be as adequately cooled as have the interior tubes (50) by the flow of air between the fins (40) and the tubes (50). Herein, a cover (80 or 85) is connected over the edges (45) of the fins (40) defining a respective one of first and second end surfaces (70,75) and is spaced from the inlet surface (60) of the core (20). Consequently, the outermost tube (50), which is nearest the cover (80 or 85), is cooled substantially to the same degree as the other tubes (50). In one embodiment of the present invention, about a 5% increase in the thermal efficiency of the core (20) is attained.

Abstract: In a fuel vaporizing type of combustor for gas turbines, using fuel vaporizing tubes and associated mechanism, the vaporizing tubes having a construction and configuration adapted to maintain uniform temperatures therein, the structure as well maintaining uniform temperatures in the head plate of the unit and in an associated splash plate, if used, the structure further tending to eliminate carbon build-up within the tube per se.

Abstract: In a fuel vaporizing type of combustor for gas turbines, using fuel vaporizing tubes and associated mechanism, the vaporizing tubes having a construction and configuration adapted to maintain uniform temperatures therein, the structure as well maintaining uniform temperatures in the head plate of the unit and in an associated splash plate, if used, the structure further tending to eliminate carbon build-up within the tube per se.