| 摘要 |
<p>VALVES Valve suitable for use in a relatively narrow, elongate opening to an air duct in a window frame which opening faces inwardly towards an accommodation space. The valve has at least two, preferably three, separately made, elongate members made by extrusion. A first valve bodyforming member and a second holder-forming member together with a third support-forming member are adapted to be pivoted relative to each other. In the closed position of the valve the members are adapted to support each other in triangular form over a substantial part of the length dimension of the valve. The first and second members are jointed together as a pair and the third member is jointed together as a pair with the first member as well as being adapted to make a snap-forming supporting abutment against the second member.</p> |
