Abstract: An electret includes an electret layer. The electret layer is formed by subjecting a composite film in which inorganic dielectric particles are dispersed and held in a base film to a polarization treatment. The inorganic dielectric particles are mainly composed of an inorganic dielectric material having a bandgap energy of 4 eV or more.

Abstract: A fluid pump for a motor vehicle includes a pump wheel which is co-rotatably connected with a driving device via a rotor shaft, and a shaft bearing system for the rotor shaft. The shaft bearing system includes a bearing receptacle having a support flange, and a first and a second ball bearing. The first and the second ball bearing are each fixed to a radial outside of the rotor shaft, are each axially shiftable within the static bearing receptacle, and are positioned at opposite axial sides of the support flange. An outer race of the first ball bearing contacts the support flange. An outer race of the second ball bearing is axially preloaded away from the support flange via a preload spring. The first and the second ball bearing are each radially supported within the static bearing receptacle only by an elastic support ring which radially surrounds the outer races.

Abstract: A fluid pump for a motor vehicle includes a pump wheel which is co-rotatably connected with a driving device via a rotor shaft, and a shaft bearing system for the rotor shaft. The shaft bearing system includes a bearing receptacle having a support flange, and a first and a second ball bearing. The first and the second ball bearing are each fixed to a radial outside of the rotor shaft, are each axially shiftable within the static bearing receptacle, and are positioned at opposite axial sides of the support flange. An outer race of the first ball bearing contacts the support flange. An outer race of the second ball bearing is axially preloaded away from the support flange via a preload spring. The first and the second ball bearing are each radially supported within the static bearing receptacle only by an elastic support ring which radially surrounds the outer races.

Abstract: A hollow seal member integrally molded with an installation base member includes a first hollow wall with a first bent point as a part bendable toward an outside and a second hollow wall with a second bent point as a part bendable toward the outside. A protrusion is formed on an end of a second outer-cabin side wall, which is continuous with an outer surface of the second outer-cabin side wall, protrudes upward with respect to the first hollow wall, and makes elastic contact with a door. An end of a first outer-cabin side wall connects with a position on the second outer-cabin side wall as an inner side of the hollow seal member, from which the protrusion protrudes toward the outer-cabin side. A thick part, which protrudes toward an outer side, is formed on the first outer-cabin side wall as the outer side of the hollow seal member.

Abstract: A hollow seal member integrally molded with an installation base member includes a first hollow wall with a first bent point as a part bendable toward an outside and a second hollow wall with a second bent point as a part bendable toward the outside. A protrusion is formed on an end of a second outer-cabin side wall, which is continuous with an outer surface of the second outer-cabin side wall, protrudes upward with respect to the first hollow wall, and makes elastic contact with a door. An end of a first outer-cabin side wall connects with a position on the second outer-cabin side wall as an inner side of the hollow seal member, from which the protrusion protrudes toward the outer-cabin side. A thick part, which protrudes toward an outer side, is formed on the first outer-cabin side wall as the outer side of the hollow seal member.