Abstract: A fluid valve having a magnetic drive unit for a valve closing body is provided. The drive unit can include a core, a coil partially surrounding the core, and an armature movable by the energization of the coil and the resulting magnetic force, wherein a bearing portion can be provided at the armature, which bearing portion comprises a bearing area, by which the armature is pivotably mounted on a main body of the drive unit.

Abstract: A sealing diaphragm for a fluid valve is provided. The fluid valve includes a valve housing and a drive unit, the sealing diaphragm being of hat-like design and being configured for enclosing, on the free-end side, a portion of a valve-closing body which projects into the valve housing of the fluid valve. The sealing diaphragm can include a base portion which is configured to be rotationally asymmetrical on the outer circumferential side, the base portion being provided to abut in a form-fitted manner against an opening of the valve housing, and the base portion of the sealing diaphragm being configured to be received between the valve housing and the drive unit in such a way that the opening of the valve housing is sealed in a fluid-tight manner towards the drive unit.

Abstract: A pipe coupling comprising a housing with a receiving space for a pipe section, with fixing members for releasably fixing the pipe section in the housing, and a sealing element which is arranged in the receiving space and is designed to surround the free end of the pipe section received in the receiving space on the outer circumferential side and thereby seal the interface between the housing and the pipe section in a fluid-tight manner. The pipe coupling is characterized in that the sealing element is designed in the form of a sleeve with a first and a second free end, in that a bulge is provided at the first free end, and in that a tubular section protrudes from the bulge and forms the second free end on the edge side.

Abstract: A tubular membrane-tight flow valve features a waisted support body for the membrane which seals against an annular sealing surface at the waist of the support body. This special shape of the support body is effective in avoiding closing hammer. In the preferred embodiment the membrane is made fractionally longer than the waisted support body and this results in extremely quiet operation of the valve.

Abstract: A helmet for protecting a head according to this invention has a hard shell generally symmetrical to a longitudinal plane and having a rear edge normally juxtaposed with the nape of the neck of the wearer and a pair of front temple regions flanking the plane and normally juxtaposed with the temples of the wearer, a rear center strap having two ends and lying generally on the plane and a pair of similar side straps generally symmetrically flanking the plane and each having a rear end fixed to the other end of the center strap and a front end secured to the helmet at the respective temple region. The one end of the center strap is adjustably secured to the shell at the rear edge therefor generally on the plane. Respective fittings are slidable on the side straps between the ends thereof and a chin strap extends between the fittings and normally passes under the chin of the wearer.

Abstract: A protective helmet, e.g. a motorcycle helmet has a chinpiece below its visor which defines an air passage with a member behind this chinpiece, permitting air to flow from an opening in this chinpiece uniformly over the interior of a visor to prevent fogging thereof by moisture.