MANUALLY OPERATED FLUID DISPENSING PUMP

摘要

A manually operated reciprocating fluid pump comprising a pump housing (22) defining a pump chamber (38), a plunger (24), a piston (82) and a priming valve (92). The plunger (24) extends axially downwardly into the pump chambe r (38). The piston (82) is on the plunger (24) and is reciprocally and axially slidable within the pump chamber (38) between a bottom stroke position and a top stroke position. The priming valve (92) is mounted on the plunger (24) radially inwardly of the piston (82) for movement with the plunger (24). A sealing plug (100) is moveable with the plunger (24) and is configured to se at against and seal closed the pump chamber (38) when the piston (82) is in its bottom stroke position to prevent fluid from flowing upward through the pump chamber (38). The priming valve (92) and sealing plug (100) are mounted on t he plunger (24) in a manner to prevent axial movement of the priming valve (92) and sealing plug (100) relative to the plunger (24).