Patent Publication Number: US-2011047885-A1

Title: Window Stop

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to window technology and more particularly, to a window stop that can be conveniently affixed to a window rail at a predetermined location so that a predetermined gap will be kept between the window and the window frame, assuring a high level of safety and effectively preventing intrusion of a thief. 
     2. Description of the Related Art 
     Taiwan Utility Patent M279707, issued to the present inventor, discloses a window stop, which is capable of holding the window in position so that a predetermined gap will be kept between the window and the window frame, assuring a high level of safety and effectively preventing intrusion of a thief. However, the user must make a mounting hole on the frame of the window for the installation of the window stop. Making such a mounting through hole destroys the sense of beauty of the window. Further, this design of window stop is comprised of a big number of component parts, complicating the installation and increasing the manufacturing cost. 
     SUMMARY OF THE INVENTION 
     The present invention has been accomplished under the circumstances in view. It is therefore the main object of the present invention to provide a window stop, which uses a vertically movable sliding block to control movement of two clamping blocks, so that the clamping blocks can be conveniently controlled to clamp on a window rail firmly, simplifying the operation. 
     It is another object of the present invention to provide a window stop, which can be installed in a window conveniently without making any mounting hole or destroying the structure of the window. 
     It is still another object of the present invention to provide a window stop, which can be conveniently adjusted relative to the window to the desired position subject to the gap required between the window and the window frame. 
     It is still another object of the present invention to provide a window stop, which keeps a gap between the window and the window frame, facilitating indoor air circulation and avoiding a gas poisoning accident. 
     It is still another object of the present invention to provide a window stop, which stops the window from being fully opened, prohibiting intrusion of a thief. 
     It is still another object of the present invention to provide a window stop, which stops the window from being fully opened, prohibiting falling of a child from the building accidentally. 
     To achieve these and other objects of the present invention, a window stop window stop includes a housing, a sliding block, a tightening up screw member, two clamping blocks and a cover. Rotating the tightening up screw member causes the sliding block to move the two clamping blocks toward each other, thereby clamping on the rail of a window tightly to have a predetermined gap be kept between the window and the window frame for indoor air circulation and to stop the window from being fully opened, preventing gas poisoning due to stagnant air or falling of a child from the building accidentally and prohibiting intrusion of a thief. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING 
         FIG. 1  is an exploded view of a window stop in accordance with the present invention. 
         FIG. 2  is an oblique elevation of the window stop in accordance with the present invention. 
         FIG. 3  corresponds to  FIG. 2  when viewed from another angle. 
         FIG. 4  is an applied view of the present invention, showing the window stop installed in a window rail. 
         FIG. 5  is a sectional view of the present invention, showing the window stop installed in a window rail. 
         FIG. 6  is a schematic sectional view of the present invention, showing the coupling arrangement between the respective guide rods of the clamping blocks and the respective sliding grooves of the housing. 
         FIG. 7  is a schematic sectional view of the present invention, showing the coupling arrangement between the respective guide rods of the clamping blocks and the respective sliding grooves of the cover. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to  FIGS. 1-7 , a window stop in accordance with the present invention is shown comprising a housing  1 , a sliding block  2 , a tightening up screw member  3 , two clamping blocks  4  and a cover  5 . 
     The housing  1  comprises a vertical sliding way  11  defined therein for the sliding of the sliding block  2  vertically, a bottom slot  12  cut through the bottom wall thereof in communication between the vertical sliding way  11  and the outside space, a screw hole  131  located on the top wall  13  in communication with the vertical sliding way  11  (see  FIG. 5 ), a notch  142  located on the bottom side of the front wall  14  thereof corresponding to the bottom slot  12  for coupling to a rail  60  of a window  6 , two sliding grooves  141  transversely bilaterally located on the inner side of the front wall  14  and a plurality of rivet rods  151  horizontally disposed at the rear side thereof for holding the cover  5 . 
     The sliding block  2  has two side flanges  21  respectively coupled to and vertically movable along the vertical sliding way  11  of the housing  1 , and two beveled bottom faces  221  disposed at the bottom side thereof. The two beveled bottom faces  221  define a triangular bottom opening  22  for receiving the two clamping blocks  4 . 
     The tightening up screw member  3  has a tool groove  31  located on the top side thereof for the positioning of a hand tool, a threaded thank  32  for threading into the screw hole  131  of the housing  1  and a bottom edge  321  for stopping against the top wall  23  of the sliding block  2 . Further, the tool groove  31  can be a socket groove, crossed groove, keystone groove or blossom-shaped groove. 
     The two clamping blocks  4  are set in the triangular bottom opening  22  of the sliding block  2 , each having a beveled contact wall  41  respectively kept in close contact with the two beveled bottom faces  221  of the sliding block  2  and a vertical clamping wall  42  attached to one of the two opposite lateral sides of the rail  60  of the window  6 . The clamping wall  42  of each clamping block  4  has a plurality of ribs  421  that enhance friction between the respective clamping block  4  and the rail  60  of the window  6  (see  FIG. 4  and  FIG. 5 ). Each clamping block  4  further has a plurality of guide rods  44  and  43  respectively perpendicularly extended from the front and rear sides thereof and respectively coupled to the two sliding grooves  141  of the housing  1  (see  FIG. 6 ) and respective sliding grooves  52  on the cover  5  (see  FIG. 7 ). 
     The cover  5  has a plurality of mounting holes  51  respectively coupled to the rivet rods  151  of the housing  1 , two sliding grooves  52  horizontally bilaterally located on the front side thereof and respectively coupled to the guide rods  43  of the clamping blocks  4  and a bottom notch  53  attached to the rail  60  of the window  6 . 
     After the window stop is attached to the rail  60  of the window  6 , a hand tool is attached to the tool groove  31  of the tightening up screw member  3  and operated to rotate the tightening up screw member  3  downwards relative to the housing  1 , forcing the bottom edge  321  of the tightening up screw member  3  against the top wall  23  of the sliding block  2 , and therefore the sliding block  2  is lowered. At this time, the beveled bottom faces  221  of the sliding block  2  are respectively forced against the beveled contact walls  41  of the clamping blocks  4 , moving the two clamping blocks  4  toward each other, and therefore the vertical clamping walls  42  of the two clamping blocks  4  are respectively firmly secured to the two opposite lateral sides of the rail  60  of the window  6  (see  FIG. 5 ). Thus, the front wall  14  of the housing  1  can stop against one side  61  of the window  6  (see  FIG. 4 ) to prevent falling of a child from the building accidentally. Further, another side of the window  6  can be kept spaced from the window frame (not shown) at a distance for indoor air circulation to avoid a gas poisoning accident due to stagnant air. 
     Further, a pad  140  can be fixedly mounted on the front wall  14  of the housing  1  (see  FIG. 3 ) for stopping against one side  61  of the window  6 . The pad  140  can be prepared from rubber, silicon rubber or elastic plastics. 
     In conclusion, the invention provides a window stop, which has the following advantages:
     1. By means of rotating the tightening up screw member  3 , the sliding block  2  is lowered to move the two clamping blocks  4  toward each other so that the clamping walls  42  of the clamping blocks  4  are firmly clamped on the two opposite lateral sides of the rail  60  of the window  6 . This operation procedure is quite simple   2. Mounting of the window stop is quite simple and need not make a hole on the window  6  or destroy the structure of the window  6 .   3. After fixation of the window stop to the rail  60 , the distance between the side  61  of the window  6  and the window frame is determined, Thus, the user can adjust the position of the window stop on the rail  60  subject to the desired gap between the window and the window frame.   4. After installation of the window stop, a gap is kept between the window and the window frame for indoor air circulation, avoiding gas poisoning due to stagnant air.   5. After installation of the window stop, the window  6  cannot be fully opened, prohibiting intrusion of a thief.   6. After installation of the window stop, the window  6  cannot be fully opened, preventing falling of a child from the building accidentally.