Abstract:
The present invention relates to a device for automatic closing of cut-off throttle at hose reels including a rotatable reeling or wind-up drum (12) with at least one suction hose (10) for extracting or sucking-out contaminated gases. In order to make this device simple and reliable in operation, a position changing device (32) is mounted on or at the wind-up drum (12) so that said position changing device (32) cooperates with a throttle pivoting means (31) one or two times per revolution of said wind-up drum (12) and so that said position changing device (32) reverses the throttle pivoting means (31) when the direction of rotation of the wind-up drum (12) is reversed.
Abstract:
The present invention relates to an adjustable device for exhaustion and/or supply of gases and gas supported particles, said device (1) comprising at least one exhaustion and/or supply conduit (4) which is pivotable in at least vertical direction, whereby at least one force-producing balancing device (54) is provided for balancing the exhaustion and/or supply conduit (4). In order to provide at such an adjustable device that the balancing device (54) generates balanced forces which correspond with the correct balancing requirement, the force-producing balancing device (54) cooperates with a compensating device (57) which compensates for differences between the balancing force that said force-producing balancing device (54) exerts on the exhaustion and/or supply conduit (4) and the force required for balancing said exhaustion and/or supply conduit in substantially all its positions.