| 摘要 |
A closure assembly of an opening of or in a building or like structure, said closure assembly having two mutually pivoted panels (glazed or otherwise) mounted so as to be disposable in three types of condition: (i) a closed condition whereby said two panels provide at least a partial closure of said opening, (ii) a second condition where both distal extremeties of the mutually pivoted panels are constrained to pivot from either (1) an axis fixed with respect to said opening and an axis tracked with respect to said opening, or (2) two spaced axes (each tracked relative to said opening), and (iii) a third condition where the mutually pivoted panels are constrained to pivot from only (a) an axis fixed with respect to said opening, or (b) an axis tracked with respect to said opening, such third condition including the prospect of said panels folding to each other about their mutual pivot and being positioned in that condition away from said opening. |
