| 摘要 |
The present invention relates to an air ventilation unit formed in an induct of a grease supplying apparatus and, more specifically, to an air ventilation unit for supplying grease connected by being screwed and coupled to the lower end of a body having an air exhaust and injection hose formed on one side of the induct in the grease supplying apparatus, wherein the grease supplying apparatus includes a pump connected with a cylinder and a discharge tube having its upper end connected with the pump and lower end connected to a working tube of the induct. The ventilation unit comprises: a vertical ventilation hole formed in a body in a longitudinal (vertical) direction of the body; a horizontal ventilation hole connected with the vertical ventilation hole and formed in a crossing (horizontal) direction with the vertical ventilation hole; an installation hole connected with the horizontal and vertical ventilation holes by passing through the body in a longitudinal center direction of the body; a cylinder mounted in the installation hole; a working rod connecting the cylinder rod and protruding from a lower side of the body through the vertical ventilation hole by a predetermined length; a packing making the vertical ventilation hole opened or closed by being coupled to one end of the working rod; an air injection hose installed to pass through the body in a longitudinal direction; a backflow prevention check valve connected to the air injection hose; and an O-ring inserted and installed into the outer circumference of the lower end of the body. |
