Abstract: Disclosed is a heat exchanger, especially an exhaust gas heat exchanger, comprising a housing (101, 201, 301, 401, 501, 601, 702, 801, 901, 1101, 1401, 1501, 1901, 2001, 2101, 2201) which can be penetrated by at least one first medium (M1) and at least one second medium (M2), and at least one sealing element (213, 607, 707, 906, 1006, 1011, 1411, 1506, 2205). At least one flow means (217, 1507, 1507a, 1508, 1904, 2005, 2105, 2206, 2206a, 2206b), around which the second medium flows, is provided inside the housing, said flow means improving heat transfer from the first medium to the second medium.

Abstract: The invention relates to a heat exchanger housing (1) for at least one heat exchanger for exchanging heat between a first fluid, in particular an exhaust gas or charge air, and a second fluid, in particular a coolant (6). According to the concept of the invention, a bypass duct (40) is integrated in the heat exchanger housing (1), with the housing having a housing body (10) with a chamber which is designed to be traversed by the second fluid and to hold a number of flow ducts which can be traversed by the first fluid; a bypass duct (40) which is designed to be traversed by the first fluid; with the chamber and the bypass duct (40) being formed in one piece with the housing body (10).

Abstract: The invention relates to a heat exchanger housing (1) for at least one heat exchanger for exchanging heat between a first fluid, in particular an exhaust gas or charge air, and a second fluid, in particular a coolant (6). According to the concept of the invention, a bypass duct (40) is integrated in the heat exchanger housing (1), with the housing having a housing body (10) with a chamber which is designed to be traversed by the second fluid and to hold a number of flow ducts which can be traversed by the first fluid; a bypass duct (40) which is designed to be traversed by the first fluid; with the chamber and the bypass duct (40) being formed in one piece with the housing body (10).

Abstract: Disclosed is a heat exchanger, especially an exhaust gas heat exchanger, comprising a housing (101, 201, 301, 401, 501, 601, 702, 801, 901, 1101, 1401, 1501, 1901, 2001, 2101, 2201) which can be penetrated by at least one first medium (M1) and at least one second medium (M2), and at least one sealing element (213, 607, 707, 906, 1006, 1011, 1411, 1506, 2205). At least one flow means (217, 1507, 1507a, 1508, 1904, 2005, 2105, 2206, 2206a, 2206b), around which the second medium flows, is provided inside the housing, said flow means improving heat transfer from the first medium to the second medium.

Abstract: A metal-ceramic device includes an electroactive ceramic substrate having a pair of opposed planar surfaces and a thickness aspect. Conductive electrodes sandwich the ceramic substrate and a first sheet metal cap having a concave shape, a substantially unchanging thickness and a rim is joined to a first planar surface of the ceramic substrate. A second sheet metal cap having a concave shape, a substantially unchanging thickness and a rim is bonded to a second planar surface of the ceramic substrate, the second planar surface opposed to the first planar surface. In an actuator embodiment, a potential is applied across the conductive electrodes to cause an expansion of the ceramic substrate in the thickness dimension and a concomitant contraction in its planar dimensions. The contraction causes a flexure of the sheet metal caps, which flexures are used for actuation purposes.

Abstract: A biocompatible hydrophobic laminate. The laminate structure includes one layer of a rubber, such as silicone rubber, which is biocompatible with the inside of the body. The laminate structure further includes a hydrophobic layer or membrane formed of a thermoplastic elastomer such as a styrene triblock copolymer. The triblock copolymer may contain styrene endblocks with an elastomeric midblock such as polyisoprene, polybutadiene, polyisobutylene, and poly(ethylene-co-butylene). The laminate structure may be utilized for structures to be introduced into the body, such as for a breast prosthesis shell or a coating for a catheter.