A pump includes a suction space, a delivery space and valves. The suction space is at least partly bounded by a flexible body and located between end elements, at least one of which can be driven so as to move in a reciprocating manner. The delivery space surrounds the suction space and around which a housing is provided. The valves are provided in the housing and in at least one of the end elements, and are constructed such that when a volume of the suction space is increased, a medium is sucked into said suction space, and when the volume is reduced, the medium flows through one of the valves to the delivery space, from which it is expelled when the volume of the delivery space is reduced.

A pump includes a suction space, a delivery space and valves. The suction space is at least partly bounded by a flexible body and located between end elements, at least one of which can be driven so as to move in a reciprocating manner. The delivery space surrounds the suction space and around which a housing is provided. The valves are provided in the housing and in at least one of the end elements, and are constructed such that when a volume of the suction space is increased, a medium is sucked into said suction space, and when the volume is reduced, the medium flows through one of the valves to the delivery space, from which it is expelled when the volume of the delivery space is reduced.

A vaporizer apparatus includes a pump housing, a main housing containing an evacuation chamber, and an operation unit attached to the main housing. The operation unit selectively seals the evacuation chamber off from communication with an air inlet. One or more pumps in the pump housing is/are operable to generate a vacuum in the evacuation chamber. A mouthpiece is attached to the main housing, and may be selectively placed in communication with the evacuation chamber. When oil is placed in the evacuation chamber and the operation unit is operated, the evacuation chamber is temporarily sealed off from the inlet, creating a vacuum sealed chamber connected with the pump(s). Then, the pump(s) is/are activated to reduce pressure in the evacuation chamber, and the oil is vaporized at an ambient temperature without requiring a heater. When the operation unit is released, the evacuation chamber is emptied via the mouthpiece.

A vaporizer apparatus includes a pump housing, a main housing containing an evacuation chamber, and an operation unit attached to the main housing. The operation unit selectively seals the evacuation chamber off from communication with an air inlet. One or more pumps in the pump housing is/are operable to generate a vacuum in the evacuation chamber. A mouthpiece is attached to the main housing, and may be selectively placed in communication with the evacuation chamber. When oil is placed in the evacuation chamber and the operation unit is operated, the evacuation chamber is temporarily sealed off from the inlet, creating a vacuum sealed chamber connected with the pump(s). Then, the pump(s) is/are activated to reduce pressure in the evacuation chamber, and the oil is vaporized at an ambient temperature without requiring a heater. When the operation unit is released, the evacuation chamber is emptied via the mouthpiece.

A fluid system includes a pumping flowline, wherein the pumping flowline is in selectable fluid communication with a production flowline, a cylinder including a first port and a second port, a piston slidably disposed in the cylinder, the piston sealing against an inner surface of the cylinder to form a first chamber and a second chamber, wherein the first chamber is in fluid communication with the first port and the second chamber is in fluid communication with the second port, and a first flowline in fluid communication with the first port of the cylinder and the pumping flowline, the first flowline including a first flowline valve, wherein, in response to opening the first flowline valve, the piston is displaced through the cylinder in a first direction to expand a volume of the first chamber of the cylinder.

A fluid system includes a pumping flowline, wherein the pumping flowline is in selectable fluid communication with a production flowline, a cylinder including a first port and a second port, a piston slidably disposed in the cylinder, the piston sealing against an inner surface of the cylinder to form a first chamber and a second chamber, wherein the first chamber is in fluid communication with the first port and the second chamber is in fluid communication with the second port, and a first flowline in fluid communication with the first port of the cylinder and the pumping flowline, the first flowline including a first flowline valve, wherein, in response to opening the first flowline valve, the piston is displaced through the cylinder in a first direction to expand a volume of the first chamber of the cylinder.

A pneumatic pump silencer including a body defining an inner volume and having at least one wall including an air outlet orifice, and an attenuating pad having a face arranged across from the air outlet orifice, wherein a gap is arranged between the face of the attenuating pad and an outer face of the wall including the air outlet orifice, the thickness of the gap being between 0.5 mm and 5 mm.

A pneumatic pump silencer including a body defining an inner volume and having at least one wall including an air outlet orifice, and an attenuating pad having a face arranged across from the air outlet orifice, wherein a gap is arranged between the face of the attenuating pad and an outer face of the wall including the air outlet orifice, the thickness of the gap being between 0.5 mm and 5 mm.

There is described herein a system for determining the interaction between a test atmosphere and a simulated respiratory tract, said system comprising: (a) a first pump comprising: (i) a chamber configured for containing a first volume of gas comprising a test atmosphere; (ii) a first port adapted for receiving and outputting gas and comprising a valve for regulating the flow of gas through the first port, said valve being moveable between open and closed positions, wherein in the open position said valve is openable towards a test atmosphere or surrounding air; (iii) a second port adapted for outputting and receiving gas and comprising a valve for regulating the flow of gas through the second port, said valve being moveable between open and closed positions; (iv) a piston plate in the chamber, said piston plate comprising one or more apertures for the uptake or inflow of gas into the chamber wherein one or more, or each, of the apertures include a valve that is movable between open and closed positions and is capable of regulating the uptake or inflow of gas; (b) a second pump comprising: (i) a chamber configured for containing a second volume of gas, wherein the first and second volumes of gas are different; (ii) a port adapted for receiving and outputting gas; and (iii) a motor for controlling the operation of the second pump; (c) a connecting structure operable to transmit the gas from the first pump into the second pump; and (d) one or more openings in the first pump or the second pump or the walls of the connecting structure or a combination of two or more thereof, said openings being capable of receiving a module for containing a cell culture medium or for monitoring conditions in the chamber or for gas sampling or for gas characterisation.

Apparatus for compressing cryogenic fluid in at least one compression stage comprising at least one piston and at least one sleeve delimiting at least one compression chamber, a shaft that is able to move in translation along a longitudinal axis (A), the shaft being connected to the piston(s) or sleeve(s) and being able to move with an alternating movement in two opposite directions to ensure phases of compression and intake of fluid into the at least one compression chamber by moving the at least one piston and the at least one sleeve in a relative manner, characterized in that the shaft comprises a portion of reduced cross section in the longitudinal direction (A), said portion of reduced cross section separating two adjacent parts of the shaft, the shaft also comprising at least one linking element made of material that is less thermally conductive than the constituent material of the shaft, in particular a composite material, said at least one linking element having two ends connected respectively to the two adjacent parts of the shaft.