Abstract: An air-supply device for supplying breathing air into a breathing-air region. An inflow opening connected to an outflow region via an interior. An outflow region connected to the outflow region via the interior. The outflow region formed on a flexible, air-permeable material. For flexible use of the air-supply device and to avoid significant adverse effect to a user, provision is made for the air-supply device to have a sheet-like, flexible portion, which has a first flat side and a second flat side, located opposite the first. The outflow region arranged on the first flat side. The interior formed between the first flat side and the second flat side. In the interior, at least the outflow region has arranged on it at least one spacer, which prevents the outflow region from butting against the second flat side.

Abstract: A device for supplying breathing air to a breathing air region has an air purification unit with filter unit and blower unit. First areal outflow regions with air outlet openings and having a first surface area are provided. The air purification unit supplies breathing air to the first areal outflow regions and the breathing air flows out in an outflow direction. Areal boundary devices with a second surface area are provided. The areal boundary devices are arranged opposite the first areal outflow regions such that each first areal outflow region has one of the areal boundary devices positioned opposite thereto at an angle of less than 10°. The second surface area of the areal boundary device corresponds at least to the first surface area of the first areal outflow region. The breathing air region is located between the areal boundary device and the first areal outflow region.

Abstract: An air-supply device (1) for supplying breathing air into a breathing-air region (2) has at least one inflow opening (4, 6) for supplying breathing air, and also has an interior (10) and at least one outflow region (11), via which breathing air flows out into the breathing-air region (2). The inflow opening (4, 6) is connected to the outflow region (11) via the interior (10). The outflow region (11) is connected to the outflow region (11) via the interior (10). The outflow region (11) is formed on a flexible, air-permeable material (12). In order to provide for flexible use of the air-supply device (1) and to avoid any significant adverse effect to a user, provision is made for the air-supply device (1) to have a sheet-like, flexible portion (16), which has a first flat side (7) and a second flat side (8), located opposite the first. The outflow region (11) is arranged on the first flat side (7). The interior (10) is formed between the first flat side (7) and the second flat side (8).

Abstract: The invention relates to a supply device (1, 51, 81, 101) for supplying breathable air to a breathable air region (2, 52, 82) which is at least partially open to the surroundings. Said supply device comprises means for generating a flow of air (3, 53, 83) for supplying breathable air to the breathable air region (2, 52, 82). Said supply device (1, 51, 81, 101) also comprises means for generating at least one shielding air flow (4, 5, 54, 84) which shields the breathable air flow (2, 52, 82) at least partially with respect to the surroundings.

Abstract: The invention relates to a supporting device for a support (12) used to support a lower extremity, in particular a knee joint, a lower leg, a foot or an ankle, an upper leg support (14) and a lower leg support (16) being provided and interconnected via an articulation (17), the upper leg support (14) comprises at least a load-bearing surface (24, 28), the lower leg support (16) comprises at least a load-bearing surface (31), a support fixing (18) is provided, which engages with the support (12), the lower leg support (16) and the support fixing (18) being coupled to one another for the transfer of force.

Abstract: The invention relates to a supporting device for a support (12) used to support a lower extremity, in particular a knee joint, a lower leg, a foot or an ankle, an upper leg support (14) and a lower leg support (16) being provided and interconnected via an articulation (17), the upper leg support (14) comprises at least a load-bearing surface (24, 28), the lower leg support (16) comprises at least a load-bearing surface (31), a support fixing (18) is provided, which engages with the support (12), the lower leg support (16) and the support fixing (18) being coupled to one another for the transfer of force. (See FIG.

Abstract: A whistle comprises a mouthpiece, a resonator and an air outlet opening. In one embodiment, a bottle opener is formed in the wall of the resonator. The bottle opener is made of a combination of a first segment shaped approximately like a quarter circle and formed in the wall of the resonator and a second segment formed as a separate component. The second segment is shaped like a metal strip. The strip is incorporated in the wall of the resonator in such a way that its outer contour follows the approximately quarter-circle contour of the first segment. Therefore, the strip projects somewhat from the surface of the first segment so that a free edge projects out from the first segment.