Abstract: A sound reducer (10) includes a housing (12) having a jacket (122) extending longitudinally along and rotationally symmetrical about a housing axis. Two end walls (123) are aligned transverse to the housing axis main pipe (18) and penetrating the housing (12) parallel offset to the housing axis with windows (182) formed as pipe wall openings. The main pipe (20) is sealingly fixed in passages penetrating the end walls (123). The end walls (123) have a convex base curvature that is rotationally symmetrical with the housing axis and, in the region of the passages, merge into outwardly pointing pipe sockets (16) that project in one piece and in one material from the respective end wall (123). Annular transition regions (14) are curved concavely in deviation from the convex base curvature with a radius that is at least 1/15 of the radius of the convex curvature of the base curvature.

Abstract: A sound reducer (1) has a main pipe (10) and an annular chamber (40) that surrounds the main pipe (10). The annular chamber (40) is connected to the interior of the main pipe (10) in a sound-conducting manner via at least one first window (11) while being closed otherwise. Thus, the annular chamber (40) acts as a resonator chamber. A flow-around body (20) is arranged in the interior of the main pipe (10) and is fixed to the inner wall of the main pipe (10) by struts (30; 130, 230).

Abstract: A device for reducing airborne and structure-borne sound has a flow channel with a flow channel wall (22, 22?, 22?) and at least one resonator chamber (40, 40?, 40?) adjacent the flow channel wall (22, 22?, 22?). The flow channel wall is formed by a sound absorber (30, 30?, 30?) at least in a part bordering the resonator chamber (40, 40?, 40?). The sound absorber (30, 30?, 30?) is covered towards the resonator chamber (40, 40?, 40?) by an acoustically reflecting inner wall (42, 42?, 42?) of the resonator chamber with at least one wall aperture (44, 44?, 44?). Openings (32, 32?, 32?) completely covers the wall aperture (44, 44?, 44?) of the inner wall (42, 42?, 42?) of the resonator chamber such that sound waves flowing through the flow channel must pass the sound absorber (30, 30?, 30?) to enter the resonator chamber (40, 40?, 40?).

Abstract: A sound attenuator has an inner pipe (12) with expansion sections (121) of enlarged diameter corresponding to the constriction sections (141) of an outer pipe (14). The expansion sections (121) in pairs axially delimit an intermediate inner pipe section (122) containing a wall opening (18) and having a reduced diameter relative to the expansion sections (121). The inner surface of the outer pipe (14) in each of its constriction sections (141) is connected to the outer surface of the inner pipe (12) in its respective corresponding expansion section (121). A method of manufacturing such a sound attenuator (10) also is provided and uses internal high-pressure forming.

Abstract: A sound reducer (10) has a housing (14) with a housing wall bounding an interior space (141). The housing wall has a mantle (142) extending longitudinally along a housing axis. Two end walls (143) are transverse to the housing axis. A main tube (12) extends through the interior space (141) and has a first and second ends (121). Windows (22) are formed as tube wall openings within the interior space (141). The first end (121) of the main tube (12) is fixed at a first passage (18a) through the housing wall, and the second end (122) of the main tube (12) is fixed at a second passage (18b) through the housing wall. At least the second passage (18b) passes eccentrically through one of the end walls (143). The main tube (12) is curved in a main plane and the first passage (18a) passes through the mantle (142).

Abstract: A sound attenuator has an inner pipe (12) with expansion sections (121) of enlarged diameter corresponding to the constriction sections (141) of an outer pipe (14). The expansion sections (121) in pairs axially delimit an intermediate inner pipe section (122) containing a wall opening (18) and having a reduced diameter relative to the expansion sections (121). The inner surface of the outer pipe (14) in each of its constriction sections (141) is connected to the outer surface of the inner pipe (12) in its respective corresponding expansion section (121). A method of manufacturing such a sound attenuator (10) also is provided and uses internal high-pressure forming.

Abstract: A device for reducing airborne and structure-borne sound has a flow channel with a flow channel wall (22, 22?, 22?) and at least one resonator chamber (40, 40?, 40?) adjacent the flow channel wall (22, 22?, 22?). The flow channel wall is formed by a sound absorber (30, 30?, 30?) at least in a part bordering the resonator chamber (40, 40?, 40?). The sound absorber (30, 30?, 30?) is covered towards the resonator chamber (40, 40?, 40?) by an acoustically reflecting inner wall (42, 42?, 42?) of the resonator chamber with at least one wall aperture (44, 44?, 44?). Openings (32, 32?, 32?) completely covers the wall aperture (44, 44?, 44?) of the inner wall (42, 42?, 42?) of the resonator chamber such that sound waves flowing through the flow channel must pass the sound absorber (30, 30?, 30?) to enter the resonator chamber (40, 40?, 40?).

Abstract: The osteosynthetic device for the fixation of a bone or bone fragments has a longitudinal axis (6) and comprises a bone screw (1) with a shaft (2) bearing a thread (3), a front end (4) and a rear end (5), said thread (3) having a maximum outer diameter d; and a wing-like blade (7) with a leading end (8) being connected to the front end (4) of the bone screw (1) and a trailing end (9) being connected to the rear end (5) of the bone screw (1). The blade (7) is further provided with a coaxial longitudinal aperture (17) having a length I extending between the leading end (8) and the trailing end (9) and a width w?d. Further the blade (7) is coaxially and rotatably mounted on said shaft (3) of said bone screw (1).

Abstract: The osteosynthetic device for the fixation of a bone or bone fragments has a longitudinal axis (6) and comprises a bone screw (1) with a shaft (2) bearing a thread (3), a front end (4) and a rear end (5), said thread (3) having a maximum outer diameter d; and a wing-like blade (7) with a leading end (8) being connected to the front end (4) of the bone screw (1) and a trailing end (9) being connected to the rear end (5) of the bone screw (1). The blade (7) is further provided with a coaxial longitudinal aperture (17) having a length I extending between the leading end (8) and the trailing end (9) and a width w?d. Further the blade (7) is coaxially and rotatably mounted on said shaft (3) of said bone screw (1).