INVERTED FLUID DISPENSING PUMP AND DISPENSING SYSTEM, AND METHOD OF USING AN INVERTED PUMP

摘要

A valve system for controlling a flow of a fluid is provided that includes a port including a valve seat, and a ball adapted to cooperate with the valve seat to seal the port. The valve system also includes an arrangement for magnetically positioning the ball on the valve seat. A method for operating a pump is provided that includes releasing a piston causing the piston to return to an unactuated position to increase the interior volume forcing fluid in a reservoir to move into the piston body through a port due to a pressure differential between the interior volume and the reservoir. The method also includes sealing the port with a ball after the piston returns to an unactuated position and the pressure differential falls below a threshold by magnetically attracting the ball to a valve seat of the port.