Covering apparatus for opening of underground pipeline or box

Abstract

There is disclosed a covering apparatus for a personnel opening of a sewer, a tap water pipeline, or an underground pipeline or box for telecommunication or electric power devices. More particularly, the covering apparatus includes an adjustable height corresponding to the rising of paving. The covering apparatus includes seat assembly and a cover installed on the seat assembly. The seat assembly includes a primary seat and at least one secondary seat. The primary seat defines a cavity for receiving the cover or, if necessary, a lip of the secondary seat. The secondary seat defines a cavity for receiving the cover. Thus, the height of the covering apparatus can be increased. Level difference between new paving and the cover can be eliminated, and the safety of pedestrians, riders and drivers using the new paved road is improved. Moreover, the covering apparatus can be assembled effectively regarding time and labor.

1 . A covering apparatus comprising a seat assembly and a cover ( 20 ) for closing the seat assembly, the cover ( 20 ) comprising a lip ( 21 ) on the bottom, the seat assembly comprising: 
 a primary seat ( 10 ) being hollow and comprising a first cavity ( 11 ) in the top for receiving the lip ( 21 ) of the cover ( 20 ) and a second cavity ( 13 ) therein; and    at least one secondary seat ( 30 ) being hollow and comprising a first cavity ( 31 ) in the top for receiving the lip ( 21 ) of the cover ( 20 ), a second cavity ( 33 ) therein and a lip ( 34 ) on the bottom for insertion in the second cavity ( 13 ;  33 ) of one of the primary seat ( 10 ) and another secondary seat ( 30 ), so that the secondary seat ( 30 ) can be provided between the cover ( 20 ) and the primary seat ( 10 ) in order to easily adjust the height of the covering apparatus if necessary.    
   
   
       2 . The covering apparatus according to  claim 1  wherein the primary seat ( 10 ) and the secondary seat ( 30 ) are annular.  
   
   
       3 . The covering apparatus according to  claim 1  or  2  wherein the primary seat ( 10 ) comprises a flange ( 15 ) on the external side, wherein the secondary seat ( 30 ) comprises a flange ( 35 ) on the external side, wherein the seat assembly comprises at least one brace ( 40 ) for holding the flanges ( 15 ;  35 ) together.  
   
   
       4 . The covering apparatus according to  claim 3  wherein the flange ( 35 ) of the secondary seat ( 30 ) comprises a plurality of locking holes ( 36 ) therein, wherein the brace ( 40 ) comprises a plurality of apertures ( 41 ) therein corresponding to the locking holes ( 36 ), wherein the seat assembly comprises a plurality of fasteners ( 45 ) driven through the locking holes ( 36 ) and the apertures ( 41 ).  
   
   
       5 . The covering apparatus according to  claim 4  wherein the fasteners ( 45 ) are screws, wherein the locking holes ( 36 ) are locking holes.  
   
   
       6 . The covering apparatus according to  claim 2  wherein the internal diameter of the first cavity ( 11 ) is larger than that of second cavity ( 13 ) of the primary seat ( 10 ).  
   
   
       7 . The covering apparatus according to  claim 2  wherein the internal diameter of the first cavity ( 31 ) is larger than that of second cavity ( 33 ) of the secondary seat ( 30 ).