Ventilator
AssigneeTiton Hardware Limited
InventorDaren Leith
Life of this patent
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Abstract
A glazed-in ventilator (10) includes a flap (12) which is rotatable about its longitudinal axis. Each end of the flap is connected by a thumb wheel (24) to an end cap (28). Inside the thumb wheel, a series of projections (36) engage a conical surface (34). This engagement provides an axial thrust along the flap which ensures that the structure of the ventilator is rigid. In addition, the ventilator may be manufactured to relatively low tolerances and the friction coupling provided by the engagement of pegs (36) and surface (34) works well even if the flap is not exactly the designed length.
Claims30
A ventilator comprising an elongate flap having first and second ends, first and second connection means located at the first and second ends respectively, the connection means connecting the flap to support means and being arranged to permit the flap to rotate about a longitudinal axis thereof, and biasing means including a tapered bearing, the tapered bearing biasing the first end along the longitudinal axis.
A ventilator comprising an elongate flap having first and second ends, first and second connection means located at the first and second ends respectively, the connection means connecting the flap to support means and being arranged to permit the flap to rotate about a longitudinal axis thereof, and a bearing element located on one of the first end and the support means, and a resilient projection carried on the other of the first end and the support means, the bearing element having a tapered bearing surface substantially coaxial with the longitudinal axis of the flap, the projection engaging the tapered bearing surface biasing the first end along the longitudinal axis.
A ventilator comprising an elongate flap having first and second ends, first and second connection means located at the first and second ends respectively, the connection means connecting the flap to support means and being arranged to permit the flap to rotate about a longitudinal axis thereof, the first connection means including a friction coupling comprising a bearing element located on one of the first end and the support means, and a resilient projection carried on the other of the first end and the support means, the bearing element having a substantially cylindrical or tapered bearing surface substantially coaxial with the longitudinal axis of the flap, the projection engaging the bearing surface frictionally to couple the rotational orientation of the flap relative to the support means.
Dependencies are inferred from the claim text.