A thermal operated fluid pump has a plunger which is moved by a thermally expandable element to compress a fluid, such as natural gas, into a storage cylinder.

A thermal operated fluid pump has a plunger which is moved by a thermally expandable element to compress a fluid, such as natural gas, into a storage cylinder.

An exemplary method includes using a pressure supply device (PSD) to actuate a hydraulic customer includes activating, when in the first position, a first gas generator of the multiple gas generators thereby driving the piston to the second position, pressurizing the hydraulic fluid, and discharging the pressurized hydraulic fluid to the customer; actuating the customer in response to receiving the pressurized hydraulic fluid; resetting the piston to first position by transferring a resetting hydraulic fluid into the reservoir; and exhausting gas and condensate from the gas chamber in response to resetting the piston to the first position.

A mounting bracket specifically configured and adapted to allow for quick and easy mounting of a fluid pump, such as a pump commonly used in dispensing fountain drinks. The mounting bracket includes fluid passageway(s) which are fluidly connectable with corresponding passageways(s) on the pump, a pressurized gas control source, as well as adjacent mounting bracket(s), such that the pump is automatically connected to such passageways to facilitate operation of the pump upon engagement of the pump in the mounting bracket.

A mounting bracket specifically configured and adapted to allow for quick and easy mounting of a fluid pump, such as a pump commonly used in dispensing fountain drinks. The mounting bracket includes fluid passageway(s) which are fluidly connectable with corresponding passageways(s) on the pump, a pressurized gas control source, as well as adjacent mounting bracket(s), such that the pump is automatically connected to such passageways to facilitate operation of the pump upon engagement of the pump in the mounting bracket.

A device includes a source for at least one liquid plastic component, and a metering device. The source intermittently supplies the at least one liquid plastic component for the metering device. A buffer device with a variable buffer volume is arranged between the source for the at least one liquid plastic component and the metering device, and the buffer device is connected to the source via an inlet opening and to the metering device via an outlet opening.

A medical fluid delivery machine including: a medical fluid pump including a pneumatically actuated pump chamber and first and second pneumatically actuated medical fluid valve chambers located respectively upstream and downstream of the pneumatically actuated pump chamber; a compressor for creating positive pressure air; and an accumulator storing the positive pressure air for delivery to at least one of the pneumatically actuated pump chamber, the first pneumatically actuated medical fluid valve chamber, or the second pneumatically actuated medical fluid valve chamber, the accumulator holding an elastic bladder that inflates under positive pressure air from the compressor, creating additional positive pressure that increases the amount of positive pressure air that the accumulator can provide.

A pump moves fluid by a piston reciprocating inside a cylinder. Fluid enters the cylinder through an inlet valve that passes through the cylinder head, and has an enlarged surface inside the cylinder, which seals against the cylinder head. This valve is normally held closed by a spring. As the piston advances, fluid is forced out of the cylinder through a passage in the cylinder head and a check valve. A rod is affixed to the piston and passes through the inlet valve. As the piston retracts, the rod slides through the inlet valve, until a stop, affixed to the rod, encounters the stem of the inlet valve. The spring holding the valve closed is overcome and the valve opens as the piston and rod move farther, until the piston is in its fully retracted position. Fluid enters the cylinder until the piston again begins to advance. The stop ceases to push the inlet valve open, and the spring again holds it closed.

A pump moves fluid by a piston reciprocating inside a cylinder. Fluid enters the cylinder through an inlet valve that passes through the cylinder head, and has an enlarged surface inside the cylinder, which seals against the cylinder head. This valve is normally held closed by a spring. As the piston advances, fluid is forced out of the cylinder through a passage in the cylinder head and a check valve. A rod is affixed to the piston and passes through the inlet valve. As the piston retracts, the rod slides through the inlet valve, until a stop, affixed to the rod, encounters the stem of the inlet valve. The spring holding the valve closed is overcome and the valve opens as the piston and rod move farther, until the piston is in its fully retracted position. Fluid enters the cylinder until the piston again begins to advance. The stop ceases to push the inlet valve open, and the spring again holds it closed.

An air operated pump 10 uses a magnet 14 mounted in the valve cup 16 of the air motor 18 and two reed sensors 20 mounted in the valve cover 22 to monitor the speed and position of the valve 16. A solenoid 24 is mounted on the valve cover 22 and can be commanded to extend a plunger 26 into the valve cup 16 to stop valve movement and therefore the pump from running away A magnetoresistive sensor 34 is located in the center of the air motor 18 to precisely monitor the piston 36 position and with air valve sensors 20 provides the input necessary for precise control and diagnostics of the pump 10 and makes it suitable for metering and plural component application.