Abstract: The present invention relates to a sound absorber comprising an inner component and an outer component surrounding said inner component, said inner component defining an inner wall provided with apertures, and said outer component defining an outer wall extending along said inner wall. For improving the sound-absorbing properties as well as the flexibility of the sound absorber, the outer wall is implemented as a bellows which, together with the inner wall, defines individual cavities, the apertures of the inner wall opening into said cavities.

Abstract: 2.1 The use of triethylene glycol di-2-ethylhexanoate—abbreviated to 3G8 or 3GEH—as low-polarity plasticizer for polyvinyl butyral foils (PVB foil) has hitherto been restricted to PVB grades with a polyvinyl alcohol (PVOH) content below 19.5% by weight.

Abstract: The invention relates to a combustion-driven setting tool for fastening elements having a housing (1), a piston guiding cylinder (22), which is displaceably mounted in the unit housing in the cylinder longitudinal direction, a piston (21) guided in the piston guiding cylinder (22) for driving a fastening element (13) into a receiving material (18), a receiving assembly (12) situated coaxial to the piston guiding cylinder (22) for the fastening element (13), as seen in the driving direction, lies in front of the piston guiding cylinder (22) and is displaceable relative to same; an elastic adjusting assembly (30), which constantly tends to separate receiving assembly (12) and the piston guiding cylinder (22) from each other; and a piston mounting (31), which is attached to the on the end of the receiving assembly (12) facing towards the piston guiding cylinder (22).

Abstract: A setting tool includes a sleeve-shaped housing (11), a piston guide (13) and an ignition unit (12) located in the housing (11), with the ignition unit (12) having a cartridge chamber bottom (19) for enclosing a propellant (25) in cartridge chamber (18), which is located between the piston guide (13) and the ignition unit (12) and a locking device (30) having a locking position (38) in which the ignition unit (12) is held in a pre-loaded position (28) against an energy accumulator (23) and in which the cartridge chamber (18) remains open, and having a release position (39) in which the ignition unit (12) is displaced to its ignition position (29) by the energy accumulator in which the cartridge chamber bottom (19) closes the cartridge chamber (18).

Abstract: An anchor bolt having a substantially cylindrical stem (2), and at least one thread provided on the stem (2) and extending from a free front end of the stem at least over a portion of a longitudinal extent of the stem (2), the thread (6) having a plurality of thread turns (6) having, at least over one/third of the stem (2), a width (b1, b2) which decreases, with an increase of a distance of a respective thread turn (6) from the free front end of the stem (2), so that a distance (x1, x2, x3) between trailing and leading flanks (8, 7) of two following one another thread turns (6) of the thread increases backwards.

Abstract: A spreading anchor including a sleeve (2) having an expansion region (3) provided with longitudinal slots (4), and an axial bore (5) having a conical shape in the expansion region (3) conically tapering toward a rear, with respect to a setting direction (5) end (6) of the sleeve (2), and a spreading member (8) having a conical profile at least along a portion of its longitudinal extent and displaceable in the axial bore (5) upon radial expansion of the sleeve expansion region (3), the spreading member (8) having a cylindrical through-bore (9) and being formed of tensioning segments (11-14) which extend in an axial direction and are held together with a possibility of a radial resilient expansion.

Abstract: An expansion dowel including a cylindrical, at least regionwise expandable dowel body (2) having a plurality of axial slots (22) opening at a front, in a setting direction(s), end (24) of the dowel body, and a bore (21) which tapers in the setting direction(s) in a region of the axial slots (22); an expansion sleeve (4) arranged inside of the dowel body (2) and tapering in the setting direction(s), the expansion sleeve (4) having a conically tapering, in the setting direction(s), bore (44), a plurality of slots extending in an axial direction, and a plurality of projections (47) projecting from an outer surface (42) of the sleeve and adapted to displace in the axial slots (22) of the dowel body (2); and an expansion member 93) axially displaceable in the bore (21) of the dowel body.

Abstract: A drive-in dowel formed as a sleeve (2, 22) provided with a load application element (3, 23) and having a front section formed of a plurality of expansion elements separated from each other by longitudinal slots, with each of the plurality of expansion elements being formed of a trailing expansion tab (8, 28) and a leading expansion tab (9, 29) separated by a flexible transitional region (6, 26) and forming with each other an angle (.alpha.) from about 100.degree. to about 160.degree., with a front end of the leading tab being located closer to a sleeve longitudinal axis (A) than the flexible transitional region (6, 26); and with the sleeve being provided with a plurality of chisel-like cutters (10) on outer surfaces of respective flexible transition regions (6; 26) which substantially do not project beyond the outer diameter of the sleeve.

Abstract: An attachment member (31) includes a tubular metallic shank (2) with an axial through-bore (3) and a slot (8) formed in the jacket of the shank (2) and extending along the entire length of the shank (2), and load application means (14) at the trailing, in the setting direction, end portion (13) of the shank (2). At an opposite, leading end (6) of the shank (2), cutters (7) are provided. The outer diameter of the shank (2) diminishes from the trailing end (4) toward the cutter carrying leading end (6). The shank (2) is anchored in a constructional component by reduction of its outer diameter over a substantial portion of its longitudinal extent.