Patent Publication Number: US-2019195401-A1

Title: Sealing ring

Description:
BACKGROUND of INVENTION 
     1. Field of Invention 
     The present invention relates to a sealing ring, and more particularly to a sealing ring without parting line issues. 
     2. Description of Related Art 
     As shown in  FIGS. 8 and 9 , a sealing ring  30  is commonly used in pipe joints, and the sealing ring  30  is used for leakage prevention purposes. The conventional sealing ring  30  has a circular cross section. However, the sealing ring  30  is generally formed by a combination of an upper mold cover and a lower mold having the shape of the sealing ring  30 . After the mold is opened, a parting line  31  is formed at the middle of the inner and outer circumferences of the sealing ring  30 . The mold line is inevitably produced only during production. Now, the surface of the sealing ring often has unevenness, and a further removal process of the parting line  31  will greatly increase the production cost of the sealing ring  30 . If the parting line  31  is not removed, the parting line  31  will directly contact the pipe which is prone to deformation, breakage or wear. When parting line  31  contacts and rubs the pipeline, the sealing ring has a poor leakage prevention effect. Further, in as shown in  FIGS. 10 and 11 , the sealing ring  30  is assembled inside a tubular body  41  of a quick-assembly joint  40 , then a retaining ring  42  and a claw ring  43  are sequentially loaded into the tubular body  41 , and a cover  44  is welded and fixed to the opening of the tubular body  41 . The cover sleeve  44  is provided with a pressing sleeve  45 , and a connecting tube  46  is continuously passed from an end of the pressing sleeve  45  through the claw ring  43 , the retaining ring  42  and the sealing ring  30 . The connecting pipe  46  can be secured by the claw ring  43  and released by the pressing sleeve  45 . In actual operation, the connecting pipe  46  interferes with the parting line  31  of the sealing ring  30  when is inserted into the tubular body  41 . The parting line  31  may cause leakage due to uneven shape of the parting line  31 , or friction during insertion may cause breakage or deformation of the parting line  31 , causing the sealing ring  30  to lose leakage prevention function. The quick-assembly joint  40  is not removable and the sealing ring also cannot be replaced. If the sealing ring does not have a leak-proof effect, the entire quick-assembly joint  40  needs to be replaced, and the durability of the quick-assembly joint  40  is lowered. 
     Therefore, it is desirable to provide a sealing ring to mitigate and/or obviate the aforementioned problems. 
     SUMMARY of INVENTION 
     An objective of present invention is to provide a floor mat puzzle having a non-rectangular isometric polygonal mat, which is capable of improving the above-mention problems. 
     In order to achieve the above mentioned objective, a sealing ring has a circular ring with a circular outer edge and a circular inner edge. The circular ring further has a first curved surface and a second curved surface between the circular outer edge and the circular inner edge. The circular outer edge, the first curved surface and the second curved surface have curved cross-sectional shapes. The circular ring further has a circular recess on the circular inner edge. The circular ring also has a circular protrusion on the circular recess respectively adjacent to the first curved surface and the second curved surface. 
     Other objects, advantages, and novel features of invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of a preferred embodiment of the present invention. 
         FIG. 2  shows a mold for making the preferred embodiment of the present invention. 
         FIG. 3  is a schematic drawing of a mold making the preferred embodiment of the present invention. 
         FIG. 4  is a cross-sectional view of the preferred embodiment of the present invention. 
         FIG. 5  is a perspective exploded view of the quick-assembly joint. 
         FIG. 6  is a cross-sectional view of the assembly of the preferred embodiment applied to the quick-assembly joint. 
         FIG. 7  is a cross-sectional view of the assembled quick-assembly joint of the preferred embodiment. 
         FIG. 8  is a perspective view of a prior art sealing ring. 
         FIG. 9  is a cross-sectional view of the prior art sealing ring. 
         FIG. 10  is a perspective exploded view of the prior art sealing ring being applied to the quick-assembly joint. 
         FIG. 11  is a cross-sectional view of the prior art sealing ring being applied to the quick-assembly joint. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENT 
     Please refer to  FIG. 1  to  FIG. 4 . A sealing ring comprises a circular ring  10  has a circular outer edge  11  and a circular inner edge  12 . The circular ring  10  is further provided with a first curved surface  13  and a second curved surface  14  between the circular outer edge  11  and the circular inner edge  12 . The circular ring  10  respectively has a curved cross-sectional shape at the circular outer edge  11 , the first curved surface  13  and the second curved surface  14 . The circular ring  10  further comprises a circular recess  15  on the circular inner edge  12 . And the circular ring  10  also having a circular protrusion  16  on the circular recess  15  respectively adjacent to the first curved surface  13  and the second curved surface  14 . The circular recess  15  and the two circular protrusions  16  all respectively have curved cross-sectional shapes. The circular ring  10  the sealing ring is molded by an upper mold A 1  and a lower mold A 2  together, and a parting line  101  is formed on the circular recess  16 . The circular recess  15  of the circular ring  10  contains the parting line  101 . Another parting line  101  is formed on the circular outer edge  11  of the circular ring  10 , which does not change the sealing effect. 
     For actual operation, please refer to  FIG. 4  to  FIG. 7 . The circular ring  10  is configured for installation in a quick-assembly joint  20 . The quick-assembly joint  20  comprises a tubular body  21  and a circular body  22 , and the tubular body  21  is provided with a positioning portion  211  at an inner edge. The circular ring  10  is mounted at the positioning portion  211 , the circular body  22  inserted into the tubular body  21 , the circular outer edge  11  of the circular ring  10  pushing against the tubular body  21 , and the circular protrusion  16  of the circular ring  10  pushes against the circular body  22 . The circular body  22  can be a water pipe or a vent pipe. Since the parting line  101  of the circular ring  10  is formed in the circular recess  15  not touching the circular body  22 , which prevents the parting line  101  from uneven shape, deformation, breakage or wear and tear that leads to lack of leakage prevention effect. When the circular ring  10  is no longer affected by the parting line  101 , the production yield and stability of the circular ring  10 . Furthermore, the quick-assembly joint  20  further comprises a positioning loop  23 , an engaging loop  24 , a securing sleeve  25  and a quick-release ring  26 . The positioning loop  23  is contained in the tubular body  21  corresponding to the positioning portion  211  to secure the first curved surface  13  and the second curved surface  14  of the circular ring  10 . The engaging loop  24  is placed in the tubular body  21 , the securing sleeve  25  stops the engaging loop  24 , the quick-release ring  26  is jacketed on the securing sleeve  25 , and the circular body  10  is placed through the quick-release ring  26 , the positioning loop  23  and the engaging loop  24 . The engaging loop  24  is configured for securing the circular body  22 , so the circular body  22  can only be inserted not pulled out. The quick-release ring  26  is configured for release the engagement between the engaging loop  24  and the circular body  22 . The engaging loop  24  has a plurality of securing claws  241  facing opposite the securing sleeve  25 , and the positioning loop  23  further has a flange  231  facing the engaging loop  24 . The flange  241  allows the securing claws  231  to flexibly engage thereof. The quick-release ring  26  has a cone-shaped end  261 , and another end of the quick-release ring  26  is further provided with a pressing portion  262 . The cone-shaped end  261  of the quick-release ring  26  is mounted in the tubular body  21 , and the pressing portion  262  is jacketed onto the tubular body  21 . The pressing portion  262  of the quick-release ring  26  pushes against the claw  241  of the engaging loop  24  with the cone-shaped end  261 , so that the claw  241  does not contact the circular body  22 , therefore the circular body  22  can be quickly drawn from the tubular body  21 . Moreover, the securing sleeve  25  is welded onto an opening of the tubular body  21 , and the cone-shaped end  261  of the quick-release ring  26  is subjected to the securing sleeve  25  and unable to be pulled away. The securing claws  241  of the engaging loop  24  push against the quick-release ring  26 , so that the quick-release ring  26  is normally un-pressed. The circular ring  10  installed in the quick-assembly joint  20  is not replaceable. The circular body  22  can be assembled onto the tubular body  21  as many time as needed. Since the parting line  101  is contained in the circular recess  15  of the circular ring  10 , so that the circular body  22  only make contact with the circular protrusion  16 . Therefore, the durability of the quick-assembly joint  20  is improved by the circular ring  10 . 
     Although the present invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of invention as hereinafter claimed.