Patent ID: 8333567

Claim:
A method of constructing a viscous fluid pump having a housing including an inlet for receiving viscous fluid and an outlet for dispensing viscous fluid, and a piston movable within an inner chamber of a bushing in the interior of said housing, the method comprising: defining a slotted opening in the bushing to extend beyond the inlet in a direction orthogonal to the longitudinal dimension of the pump for providing direct access between the inner chamber and the inlet; disposing the bushing with the slotted opening defined therein into the interior of the housing so as to place the inlet and the slotted opening in coaxial alignment along the longitudinal direction of the pump such that the inlet is in fluid communication with the inner chamber; and disposing the piston within the inner chamber of the bushing, such that movement of the piston selectively opens and closes fluid communication of the inlet with the inner chamber through the slotted opening.