Patent ID: 7431575
Filing Date: 2008-10-07
Classification: F02M,F04B

Abstract:
1. A priming pump for a fluid system that is constructed and arranged to connect to a base having a flow inlet, a flow outlet, and a flow control valve positioned between said flow inlet and said flow outlet, said priming pump comprising: a housing located atop said base and having an inlet valve compartment downstream from an inlet flow valve, an outlet valve compartment downstream from an outlet flow valve, and a plunger chamber in flow communication with said inlet and outlet valve compartments, the plunger chamber disposed between the inlet and outlet valve compartments and separating the inlet and outlet valve compartments into isolated compartments that communicate separately with the plunger chamber; and a control knob assembled to a plunger positioned in said housing and configured to encircle said plunger chamber, said control knob being axially movable toward said base, said control knob being connected to said flow control valve, wherein said flow control valve is positionable by said control knob into a direct-flow orientation and alternatively is positionable in a by-pass orientation, when in said direct-flow orientation flow from said flow inlet is routed through said flow control valve to said flow outlet, and when in said by-pass orientation fluid is drawn into said plunger chamber by way of said inlet flow valve as said control knob moves upwardly and fluid is pushed out of said plunger chamber through said outlet flow valve as said control knob moves downwardly.