Patent Publication Number: US-2005120800-A1

Title: Wear-proof metal screwing connecting structure

Description:
FIELD OF THE INVENTION  
      The present invention relates to connecting structures, and particularly to a wear-proof metal screwing connecting structure.  
     BACKGROUND OF THE INVENTION  
      The prior art manometers used in fluid are made of metal and is exposed in chemical wearing environment so that they are easy to be worn and thus damaged. Thereby, the prior art manometers must be maintained continuously. This induced the increment of cost and labor work.  
      Referring to  FIG. 4 , a prior art manometer is illustrated. In that a threaded tube  31  extends from a connecting body  30 . The threaded tube  31  has a head  32  and a neck  33 . The head  32  and neck  33  are embedded into the top end  35  of the connecting seat  34 . However, this structure has a bad shock-proof ability. Moreover, a bottom  37  of the top end  35  easily breaks. Thereby, the manufacturing cost is high.  
     SUMMARY OF THE INVENTION  
      Accordingly, the primary object of the present invention is to provide a wear-proof metal screwing connecting structure which comprises a connecting seat having a lower end for connecting to a fluid tube or a container. A top end of the connecting seat has a threaded hole; and an upper periphery of the threaded hole is arranged with a rubber edge. A connecting body locks to the threaded hole so as to be enclosed by the rubber edge. An upper end of the connecting body is installed with a pressure meter; and a threaded tube extends from pressure meter. A rubber layer encloses an upper part of the threaded tube; and the lower part of the threaded tube is screwed into the threaded hole of the connecting body so as to tightly lock the connecting body to the connecting seat.  
      The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawing. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       FIG. 1  is a front view of the present invention.  
       FIG. 2  is a lateral exploded view of the present invention.  
       FIG. 3  is a cross sectional view of the present invention.  
       FIG. 4  is a schematic view of the prior art structure. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      In order that those skilled in the art can further understand the present invention, a description will be described in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.  
      Referring to  FIGS. 1, 2  and  3 , the front view, lateral view and cross sectional view of the present invention are illustrated. In this embodiment, the present invention is realized in a manometer  10 . The connecting structure of the present invention includes a connecting seat  11  and a connecting body  13 . A lower end  14  of the connecting seat  11  is connected to a fluid tube or other container. A top end  15  of the connecting seat  11  has a screw hole  16 . A rubber edge  17  is installed around an upper periphery of the screw hole  16 . Thereby, the connecting seat  11  is connected to the connecting body  13 . A pressure meter  20  is installed above the connecting body  13 . A threaded tube  18  extends from the pressure meter  20 . A rubber layer  21  encloses the threaded tube. A lower end of the rubber layer  21  extends to the head  22  and neck  19  of the threaded tube  18 .  
      Referring to  FIG. 3 , a drum valve  23  is placed in the connecting seat  11 . Air from a lower end of the connecting seat  11  will make the drum valve  23  to expand upwards. Then the pressure will transfer to the pressure meter  20  from the channel  24 . The channel  24  is filled with air or glycerine so as to have a preferred shock-proof effect. If so, if the connecting body  13  is not tightly connected to the top end  15  of the connecting seat  11 , the correction of the pressure will be effected. If crack is generated at the top end  15 , then the fluid pressure cause that the drum valve  23  breaks. Thus, a dangerous condition occurs, but the present invention has no this problem because the height of the top end  15  has been reduced. The connecting body  13  and part of the threaded tube  18  are enclosed by the rubber layer  21  so that the tolerance and the availability are increased.  
      The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.