Apparatus for opening and closing reservoir

Abstract

An apparatus for opening/closing a reservoir, capable of communicating the inside the reservoir with outside air and preventing oil stored in the reservoir from leaking to the outside, the apparatus including a cap coupled to an oil injection port of the reservoir storing oil and provided with an air passage connecting an entry positioned in a center of an inner surface of the cap to an exit positioned at an inner surface of an outer side in a radial direction of the cap to communicate with outside air, and a gasket provided between the inner surface of the cap and the oil injection port and provided in a center thereof with an air-passing hole to communicate the air passage with an inside the reservoir, wherein the air passage is connected in a way to pass through a position, which is spaced apart from the entry to the exit in a coaxial manner with respect to the entry, at least one time.

What is claimed is: 
     
         1 . An apparatus for opening and closing a reservoir, the apparatus comprising:
 a cap coupled to an oil injection port of the reservoir storing oil and provided with an air passage connecting an entry positioned in a center of an inner surface of the cap to an exit positioned at an inner surface of an outer side in a radial direction of the cap to communicate with outside air; and   a gasket provided between the inner surface of the cap and the oil injection port and provided in a center thereof with an air-passing hole to communicate the air passage with an inside the reservoir,   wherein the air passage is connected in a way to pass through a position, which is spaced apart from the entry to the exit in a coaxial manner with respect to the entry, at least one time.   
     
     
         2 . An apparatus for opening and closing a reservoir, the apparatus comprising:
 a cap coupled to an oil injection port of the reservoir storing oil and provided with an air passage connecting an entry positioned in a center of an inner surface of the cap to an exit positioned at an inner surface of an outer side in a radial direction of the cap to communicate with outside air; and   a gasket provided between the inner surface of the cap and the oil injection port and provided in a center thereof with an air-passing hole to communicate the air passage with an inside the reservoir,   wherein the air passage is provided in a spiral shape winding from the entry to the exit of the cap.   
     
     
         3 . An apparatus for opening and closing a reservoir, the apparatus comprising:
 a cap coupled to an oil injection port of the reservoir storing oil and provided with an air passage connecting an entry positioned in a center of an inner surface of the cap to an exit positioned at an inner surface of an outer side in a radial direction of the cap to communicate with outside air; and   a gasket provided between the inner surface of the cap and the oil injection port and provided in a center thereof with an air-passing hole to communicate the air passage with an inside the reservoir,   wherein the air passage comprises a main passage provided in a ring shape between the entry and the exit of the cap, a subsidiary passage configured to connect between the main passage and the entry, and a subsidiary passage configured to connect between the main passage and the exit.   
     
     
         4 . An apparatus for opening and closing a reservoir, the apparatus comprising:
 a cap coupled to an oil injection port of the reservoir storing oil and provided with an air passage connecting an entry positioned in a center of an inner surface of the cap to an exit positioned at an inner surface of an outer side in a radial direction of the cap to communicate with outside air; and   a gasket provided between the inner surface of the cap and the oil injection port and provided in a center thereof with an air-passing hole to communicate the air passage with an inside the reservoir,   wherein the air passage comprises a main passage provided in an oval shape or a polygonal shape between the entry and the exit of the cap, a subsidiary passage configured to connect between the main passage and the entry, and a subsidiary passage configured to connect between the main passage and the exit.   
     
     
         5 . The apparatus of  claim 3 , wherein the main passage is provided in a plurality of main passages thereof each having a different diameter between the entry and the exit, and the subsidiary passage is configured to connect adjacent main passages among the plurality of main passages. 
     
     
         6 . The apparatus of  claim 4 , wherein the main passage is provided in a plurality of main passages thereof without overlapping one another, and the subsidiary passage is configured to connect adjacent main passages among the plurality of main passages. 
     
     
         7 . The apparatus of one of  claims 3  to  6 , wherein the subsidiary passage connected to the entry and the subsidiary passage connected to the exit are configured to face different directions from each other. 
     
     
         8 . The apparatus of one of  claims 1  to  4 , wherein the air passage is provided to be recessed to the inner surface of the cap. 
     
     
         9 . The apparatus of one of  claims 1  to  4 , wherein the air passage is molded to be formed at an inside the cap. 
     
     
         10 . The apparatus of one of  claims 1  to  4 , wherein a fastening unit having a ring shape is formed around the air-passing hole adjacent to the center of the gasket while being inwardly bent to a lower side.