A pump assembly is disclosed. The pump assembly including an outer casing having a first end, an opposing second end, and a cavity therein; a discharge tube positioned in the cavity and exiting the first end of the outer casing; a check valve positioned in the cavity and operably connected to the discharge tube by a coupling; and a multi-float control assembly positioned in the cavity, the multi float control assembly including a bottom float check valve operably connected to the discharge tube by the coupling and an upper float check valve connected to a vent exiting the first end of the outer casing.

A system for precision liquid delivery includes a gas reservoir having a known volume. The system has a tightly load-coupled pneumatic driver (a “TLCP driver”) that is configured to receive input power to cause the TLCP driver to move gas into the gas reservoir to produce a gas drive pressure. A valve is configured to couple the gas reservoir with a fluid reservoir having an unknown volume. The valve is further configured to selectively isolate or pneumatically couple pressures in the gas reservoir and the fluid reservoir. A gas-fluid interface couples pressure in the fluid reservoir to pressure in a fluid path. The fluid path is configured so that the fluid drive pressure driving the liquid in the fluid path is substantially the same as the fluid reservoir pressure. The system also has a pressure sensor configured to detect pressure in the gas reservoir and/or the fluid reservoir.

A pneumatic pump control system includes a pump chamber having a top end and a bottom end, an air valve coupled to the top end of the pump chamber and configured to be coupled to a pressurized air source, and a pump chamber valve coupled to the bottom end of the pump chamber. In addition, the pneumatic pump control system includes a discharge chamber having a top end and a bottom end, a discharge fitting coupled to the top end of the discharge chamber, a discharge check valve coupled to the bottom end of the discharge chamber in fluid communication with the pump chamber valve, and an inlet check valve in fluid communication with the pump chamber.

A pneumatic pump control system includes a pump chamber having a top end and a bottom end, an air valve coupled to the top end of the pump chamber and configured to be coupled to a pressurized air source, and a pump chamber valve coupled to the bottom end of the pump chamber. In addition, the pneumatic pump control system includes a discharge chamber having a top end and a bottom end, a discharge fitting coupled to the top end of the discharge chamber, a discharge check valve coupled to the bottom end of the discharge chamber in fluid communication with the pump chamber valve, and an inlet check valve in fluid communication with the pump chamber.

A pump includes a cylinder having a lower end formed with a suction pipe; an inlet section including a housing, a lower externally threaded section, an upper externally threaded section, an upper nut secured to the upper externally threaded section, and an inlet having a valve, a first connector having one end connected to the valve, and a second connector having a connection element connected to the valve, a hollow projection opposite to the connection element and provided through the housing, and an axial hole through the hollow projection; a joining section secured to the cylinder and including a hollow first externally threaded section, a hollow second externally threaded section, and a hollow first internally threaded section secured to the second externally threaded section; a manual operation section including a piston rod extending downward from a spring biased handle into the cylinder; and an outlet section.

Disclosed techniques include working fluid exergy recovery using hybrid processing. A supply of working fluid at a first pressure and a first temperature is accessed. The working fluid is compressed. The compressing yields the working fluid at a second pressure. The second pressure is greater than the first pressure. The working fluid at the second pressure and a second temperature is warmed using a first heat exchanger. The second temperature is greater than the first temperature. The working fluid at the second temperature is in a gaseous state. The working fluid is expanded in a gaseous state to a third pressure. The expanding is accomplished using a first liquid piston expander. An engine is driven to recover work from the working fluid in a gaseous state. The engine is powered by liquid from the first liquid piston expander.

A pumping system for liquids, comprising of a direct air displacement pump, which does not require a liquid level sensor mounted inside the pump body. It includes a smart controller which is able to drive and estimate the pump status (full or empty) with sensors mounted above ground.

A pump assembly is disclosed. The pump assembly including a pump having an outer casing having a first end, an opposing second end, and a cavity therein and a multi-function valve connected to the first end of the pump. The pump further including a discharge tube positioned in the cavity and exiting the first end of the outer casing; a check valve positioned in the cavity and operably connected to the discharge tube by a coupling; and a multi-float control assembly positioned in the cavity, the multi float control assembly including a bottom float check valve operably connected to the discharge tube by the coupling and an upper float check valve connected to a vent exiting the first end of the outer casing.

A pump assembly is disclosed. The pump assembly including a pump having an outer casing having a first end, an opposing second end, and a cavity therein and a multi-function valve connected to the first end of the pump. The pump further including a discharge tube positioned in the cavity and exiting the first end of the outer casing; a check valve positioned in the cavity and operably connected to the discharge tube by a coupling; and a multi-float control assembly positioned in the cavity, the multi float control assembly including a bottom float check valve operably connected to the discharge tube by the coupling and an upper float check valve connected to a vent exiting the first end of the outer casing.

A system for precision liquid delivery includes a gas reservoir having a known volume. The system has a tightly load-coupled pneumatic driver (a “TLCP driver”) that is configured to receive input power to cause the TLCP driver to move gas into the gas reservoir to produce a gas drive pressure. A valve is configured to couple the gas reservoir with a fluid reservoir having an unknown volume. The valve is further configured to selectively isolate or pneumatically couple pressures in the gas reservoir and the fluid reservoir. A gas-fluid interface couples pressure in the fluid reservoir to pressure in a fluid path. The fluid path is configured so that the fluid drive pressure driving the liquid in the fluid path is substantially the same as the fluid reservoir pressure. The system also has a pressure sensor configured to detect pressure in the gas reservoir and/or the fluid reservoir.