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1. (WO1996010721) AIR INLET VALVE
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CLAIMS

1. Air inlet valve adapted for connection to an air feed duct debouching in wall or ceiling of an area for
ventilating, which valve comprises:
a generally tubular housing;
coupling means for sealingly coupling the housing to said duct; and
an outlet opening in which an optionally disposable obstruction body is received while leaving free an edge outlet zone through which the air is blown out at an angle to the axial direction of the valve,
characterized in that
in the edge outlet zone is accommodated an annular deflection member which deflects the outer layer of the air flowing through this zone such that it leaves the said zone at an angle of (90 ± 20) * to the axial direction of the valve.
2. Air inlet valve as claimed in claim 1, characterized in that the amount of air flowing in the outer layer amounts to a maximum of about 30% of the total amount of blown-out air.
3. Air inlet valve as claimed in claim 1, characterized in that the deflection member is releasable.
4. Air inlet valve as claimed in claim 1, characterized in that the coupling means comprise an annular sealing lip of elastic material and a plurality of resilient coupling lips acting as barbed hooks, which lips can be pressed into the air feed duct while deforming elastically.
5. Air inlet valve as claimed in claim 4, characterized in that the sealing lip and the coupling lips form part of one rubber elastic coupling member.
6. Deflection member adapted and evidently intended to serve as part of an air inlet valve as claimed in any of the foregoing claims.

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