Abstract: A support arm arrangement for a local gas extractor arrangement and a local gas extractor arrangement including such a support arm arrangement. The support arm arrangement includes a first support arm and at least one second support arm being pivotally coupled to each other by friction joint arrangements. The support arm arrangement receives a tube device coupled to an extractor hood, an exterior pump device and the support arms. The extractor hood is arranged at an outermost second support arm by a linkage arm arrangement including a first link arm pivotally coupled to the outermost second support arm by a first friction joint pivotable about a first pivoting axis, and a second link arm fixedly attached to the extractor hood and pivotally coupled to the first link arm by a second friction joint pivotable about a second pivoting axis extending in a direction perpendicular to the first pivoting axis.

Abstract: A lockable friction joint includes a first joint member with a first arm member and a second joint member with a second arm member, the first and second joint members each having an inner friction surface and pivotal connecting projections. A friction adjustment device includes an adjustment element on an outer surface of the second joint member, and a fixating element on an outer surface of the first joint member. A plurality of friction discs are adjacent each other and between the inner friction surfaces of the first and second joint members, whereby friction between the friction discs is adjusted by the adjustment element. Each friction disc has at least one friction surface acting on an adjacent friction surface of another element of the friction joint and each friction disc is pivotally coupled to at least one other element of the friction joint.

Abstract: A lockable friction joint includes a first joint member with a first arm member and a second joint member with a second arm member, the first and second joint members each having an inner friction surface and pivotal connecting projections. A friction adjustment device includes an adjustment element on an outer surface of the second joint member, and a fixating element on an outer surface of the first joint member. A plurality of friction discs are adjacent each other and between the inner friction surfaces of the first and second joint members, whereby friction between the friction discs is adjusted by the adjustment element. Each friction disc has at least one friction surface acting on an adjacent friction surface of another element of the friction joint and each friction disc is pivotally coupled to at least one other element of the friction joint.

Abstract: This invention concerns an arrangement 1 intended to be used in a ventilation arrangement in order to hold and control an air channel 2. The arrangement 1 comprises a single arm construction 1.1 that is arranged along the outer surface 2A of the air channel. The arm construction 1.1 comprises two arm sections 3 and 4 arranged one after the other, a first joint 5 that unites a first arm part 3 with a fixture arrangement 6 that holds and maintains the basic position of the arm construction 1.1 and that makes possible different positioning, bending and stretching, of the arm construction 1.1 and the air channel 2, a second joint 7 that unites the first arm section 3 with the second arm section 4 and that makes possible different positioning, bending and stretching, of the arm construction 1.1 and the air channel 2. Each arm section 3 and 4 comprises an extended aluminum profile 8 and 9. The invention concerns also a ventilation arrangement comprising such an arrangement 1.

Abstract: This invention concerns an arrangement (3) that is comprised as a component (4.2) of an airtransport channel where the air-transport channel component (4.2) comprises two tubular sub-elements, a first sub-element (7) and a second sub-element (8), where the second element (8) has a diameter that is somewhat larger than that of the first element (7), which allows the first element (7) to be inserted into the second element (8) such that the two elements (7, 8) can be displaced relative to each other in a telescopic manner.

Abstract: This invention concerns an arrangement 1 intended to be used in a ventilation arrangement in order to hold and control an air channel 2. The arrangement 1 comprises a single arm construction 1.1 that is arranged along the outer surface 2A of the air channel. The arm construction 1.1 comprises two arm sections 3 and 4 arranged one after the other, a first joint 5 that unites a first arm part 3 with a fixture arrangement 6 that holds and maintains the basic position of the arm construction 1.1 and that makes possible different positioning, bending and stretching, of the arm construction 1.1 and the air channel 2, a second joint 7 that unites the first arm section 3 with the second arm section 4 and that makes possible different positioning, bending and stretching, of the arm construction 1.1 and the air channel 2. Each arm section 3 and 4 comprises an extended aluminium profile 8 and 9. The invention concerns also a ventilation arrangement comprising such an arrangement 1.

Abstract: This invention concerns a joint construction 1 intended to be used between two extended tubes 2 and 3 in order to connect these tubes 2 and 3 with each other and where the joint construction 1 offers an open internal compartment 4 that, during use of the joint construction 1, is connected to the open inner compartments 5 and 6 of the relevant tube element. The joint construction 1 comprises a first joint half 7 and a second joint half 8 that are essentially identical, an arrangement 9 that holds the joint halves 7 and 8 and thus the joint construction 1 together and where the joint halves 7 and 8 each comprise a first part 12 and 13 and a second part 14 and 15. The first parts 12 and 13 make possible a connection of the relevant joint half 7 and 8 to one of the tubes 2 and 3.

Abstract: A suction device for the removal by suction of waste gases or other environmentally harmful gases from a working location, e.g., from the exhaust pipe of an automotive vehicle, including a suction line which is connected to a central suction means or to a suction fan and one end of which is intended to be connected temporarily to, e.g., an exhaust pipe of an automotive vehicle or the like for the purpose of removing by suction exhaust gases deriving from the engine of the vehicle. In order to enable the suction line of such suction devices to be extended manually, even when the suction line is suspended vertically directly from a ceiling-mounted main suction line, the suction line is telescopic and a spring is mounted between the telescoping part of the suction line, such that the spring will be tensioned when the suction line is extended and therewith assist in restoring the suction line to its retracted state.

Abstract: A device for spot or local extraction of polluted air, dust and other gases and particles from a room, comprising a flexible hose connected to a suction pipe or fan and a supporting member carrying the hose and mounted on a wall or other preferably vertical surface in the room for pivotal movement about a preferably vertical axle. For achieving great range independently of the ceiling height in the room, in which the device is to be used, the supporting member comprises a hinged supporting arm, which is pivotal about said axle, and each joint axle of which is located in parallel with said axle, and an operating arm, which by a friction joint is connected to the outer end of the supporting arm for movement about an axle perpendicular in relation to the joint axle or axles of the supporting arm.