Closure device having ventilating structure

Abstract

A closure device includes an outer sash fixedly secured between the sill and the head members of a frame and having a number of orifices formed in a sheet member, and a slidable inner sash slidably disposed between the sill and the head members and having a number of apertures arranged to be selectively offset from the orifices of the fixed sash, or selectively aligned with the orifices of the fixed sash and to allow air to selectively flow through the apertures of the sheet member of the slidable sash. A number of plugs may be attached to the orifices of the fixed sash and each has a hole for selectively offsetting from and aligning with the apertures of the sheet member of the slidable sash.

1 . A closure device comprising: 
 a frame including a sill member and a head member,    a fixed outer sash including a sheet member fixedly secured between said sill and said head members, and including a plurality of orifices formed therein, and    a slidable inner sash including a sheet member slidably disposed between said sill and said head members, and including a plurality of apertures formed therein, and arranged to be selectively offset from said orifices of said fixed sash, or arranged to be selectively aligned with said orifices of said fixed sash and to allow air to flow through said apertures of said sheet member of said slidable sash when said sheet member of said slidable sash is moved relative to said sheet member of said fixed sash.    
   
   
       2 . The closure device as claimed in  claim 1 , wherein said sill and said head members each includes a rail provided therein to slidably attach said sheet member of said slidable sash.  
   
   
       3 . The closure device as claimed in  claim 2 , wherein said slidable sash includes at least one wheel attached to said sheet member thereof, for engaging with said rail, and for facilitating a sliding movement of said sheet member of said slidable sash along said rail of said frame.  
   
   
       4 . The closure device as claimed in  claim 1 , wherein said fixed sash includes a plurality of plugs attached to said orifices of said sheet member respectively, and each having a hole formed therein, for selectively offsetting from and for selectively aligning with said apertures of said sheet member of said slidable sash.  
   
   
       5 . The closure device as claimed in  claim 4 , wherein said plugs each includes two peripheral flanges extended radially and outwardly therefrom, for engaging with said sheet member of said fixed sash, and for securing and anchoring said plugs to said sheet member of said fixed sash.  
   
   
       6 . The closure device as claimed in  claim 4 , wherein said holes of said plugs are inclined outwardly and downwardly relative to said sheet member of said slidable sash, to prevent water or rain from flowing through said inclined holes of said plugs.  
   
   
       7 . The closure device as claimed in  claim 1 , wherein said orifices of said sheet member of said fixed sash include an inner diameter greater than that of said apertures of said sheet member of said slidable sash, for attaching said plugs.  
   
   
       8 . The closure device as claimed in  claim 1  further comprising means for moving said sheet member of said slidable sash relative to said sheet member of said fixed sash.  
   
   
       9 . The closure device as claimed in  claim 8 , wherein said moving means includes a pusher engaged with said sheet member of said slidable sash, to selectively move said sheet member of said slidable sash relative to said sheet member of said fixed sash.  
   
   
       10 . The closure device as claimed in  claim 9 , wherein said moving means includes a moving device coupled to said pusher, to operate said pusher.  
   
   
       11 . The closure device as claimed in  claim 10 , wherein said moving means includes a detector coupled to said moving device, to selectively operate said moving device.