Patent ID: 7174829

Claim:
An adjustable piston pump for displacement and or extraction of remnant from soft soil and or soft sand comprises: a pump casing cylinder with handle for support, a shaft rod with a handle and an adjustable piston, wherein the pump casing cylinder is open at one end, capped at the other end and accepts a movable shaft rod through the center of the capped end of the pump casing cylinder, the shaft rod is retractable through the center of the capped end of the pump casing cylinder and is connected to a shaft rod handle, the end of the shaft rod that connects to said shaft rod handle extends outside the capped end of the pump casing cylinder, the portion of the shaft rod that extends through the capped end of the pump casing cylinder and inside the body of the pump casing cylinder is attached to a movable adjustable piston that contains a flexible ball therein, and the force applied to the flexible ball of the adjustable piston is governed by rotating said shaft rod handle clockwise or counter-clockwise followed by the upward and downward pumping of the shaft rod.