Grease barrel pump for preventing presence of residual grease with grease spray function and variable grease discharge function

A grease barrel pump for preventing a presence of residual grease with a grease spray function and a variable grease discharge function, the grease barrel pump comprising:

• a main plate mounted on a grease barrel;
• a main cylinder extending downward from and communicating with the main plate;
• a follower plate vertically moving from an outer circumference of the main cylinder;
• and
• a power part formed on the main plate to transmit power into the main cylinder,
• wherein the main cylinder includes a body check coupled to an end of the main cylinder, and an inlet piston reciprocating in the body check,
• wherein the body check includes a body check conical inner wall and a body check conical space is formed by the body check conical inner wall,
• wherein a conical input valve is formed at an end of the inlet piston and the conical input valve includes a cylindrical body part and a conical body part,
• wherein the conical body part is formed in a conical shape that is smaller than the body check conical space so that the conical body part is received in the body check conical space, and a diameter of a lower end surface of the conical body part is smaller than a diameter of the cylindrical body part, such that a predetermined distance between the body check conical inner wall and the conical input valve is maintained during a vertical stroke of the inlet piston with respect to the body check.