Abstract:
A fluid release valve includes valve housing (VH) coupled between a pump and an outlet pipe, VH chamber providing fluid from its inlet and outlet when the pump starts, and fluid release orifice (FRO) draining outlet pipe fluid flowing back into the VH when the pump stops; and check valve (CV) combination having a CV shuttle that moves towards/away from the inlet/outlet and an internal shuttle chamber (ISC), and having a CV that moves towards/away from the inlet/outlet within the ISC. The CV combination responds to a pumped fluid pressure when the pump's pumping and stops the fluid from flowing from the inlet around the CV shuttle and out the FRO. The CV combination responds to a fluid differential pressure (FDP) when the pump stops and allows the outlet pipe fluid to drain out the FRO until the FDP reaches an equilibrium.
Abstract:
An apparatus, including a pump system, including a pump unit that includes a first pump configured with a first pump actuating portion; a second pump configured with a second pump actuating portion; and an assembly frame configured to receive the first pump and the second pump, having a first pedal coupled to the first pump actuating portion, a second pedal coupled to the second pump actuating portion, and also having a rocker arrangement with at least one rocker configured to pivotally couple the first pedal to the second pedal. A pushing movement of the first pedal in one direction causes a pulling movement of the second pedal in an opposite direction and vis versa. Movement of the pedals alternately draws fluid to be pumped into the first pump and the second pump.
Abstract:
An apparatus, including a pump system, including a pump unit that includes a first pump configured with a first pump actuating portion; a second pump configured with a second pump actuating portion; and an assembly frame configured to receive the first pump and the second pump, having a first pedal coupled to the first pump actuating portion, a second pedal coupled to the second pump actuating portion, and also having a rocker arrangement with at least one rocker configured to pivotally couple the first pedal to the second pedal. A pushing movement of the first pedal in one direction causes a pulling movement of the second pedal in an opposite direction and vis versa. Movement of the pedals alternately draws fluid to be pumped into the first pump and the second pump.