| 摘要 |
<p>Air terminal device comprising a tube formed housing (2) with a circular internal cross section, which is provided with a coaxial, detachable hub (8) which carries a settable movable covering means (15) which is settable versus the outside of the housing, whereby the hub (8) has at least three radially arranged arms (9, 10, 11), which protrude at equal distances from the hub and with essentially equal mutual angular distances and which arms can be attached to the housing, whereby the arms (9, 10, 11) of the hub (8) with its outer ends engage into corresponding openings (12) provided in the housing wall (2), and that one of the arms (11) is provided with means (20) arranged to temporarily reduce its length, in order to allow the hub (8) to be moved in the direction of this arm and thereby pull the rest of its arms out of engagement with their openings in the retainer wall.</p> |
