A pulsation dampener to dampen pulsations in a fluid may include a dampener body to dampen the fluid; an channel flange section connected to the dampener body for the fluid to enter the dampener body.

There is disclosed a hydrostatic axial piston machine having a pulse reduction device. This device has a connection location or tap in the transition region in front of the high-pressure-side kidney-like elongate hole of a distributor plate. The connection location or tap is connected by means of one or two hydraulically passively controlled switching valves to a high-pressure store. It is used for precompression and consequently for the pulse reduction. In a development, the distributor plate also has a connection location or tap in the transition region behind the high-pressure-side kidney-like elongate hole. The connection location or tap is connected via one or two hydraulically passively controlled switching valves to a low-pressure store. This is used for the decompression and consequently also for the pulse reduction.

A high-pressure pump is configured to pressurize fuel. The high-pressure pump includes a relief valve device that is placed in a relief passage, which has one end part connected to a discharge passage in a housing while another end part of the relief passage is configured to be communicated with a suction passage in the housing. The discharge passage is configured to conduct the fuel, which is pressurized in and discharged from a pressurizing chamber. The relief valve device is configured to enable or limit a flow of the fuel between one side of the relief passage, at which the discharge passage is located, and another side of the relief passage, which is opposite to the discharge passage, at a valve opening time or a valve closing time of the relief valve device.

A system for pumping a compressible fluid, a chromatography system comprising the system for pumping a compressible fluid, and a chromatography method using the system for pumping a compressible fluid, the system for pumping a compressible fluid comprising at least two pumps including a first pump and a second pump, respective pump outlet lines of which are brought together in a connection piece and are guided out of this connection piece into a common outlet line, wherein the second pump is controllable by a control unit, wherein the control unit is operatively connected to a flowmeter and the pump output of the second pump is controllable as a function of the flow measurement by the control unit.

Disclosed is a gradient proportioning valve for liquid chromatography that includes a plurality of inlet ports configured to receive a plurality of fluids, a manifold connected to each of the plurality of inlet ports configured to mix the plurality of fluids in a controlled manner to provide a fluid composition, the manifold including a plurality of conduits internal to the manifold, each of the plurality of conduits receiving fluid through a respective one of the plurality of inlet ports, an actuation mechanism having a piston located within a bored structure surrounding the piston, the actuation mechanism configured to open and close at least one of the plurality of conduits in a controlled manner where the piston and the bored structure have a tight tolerance configured to create a fluid tight seal, and a common outlet port configured to receive the fluid composition.

Disclosed is a gradient proportioning valve for liquid chromatography that includes a plurality of inlet ports configured to receive a plurality of fluids, a manifold connected to each of the plurality of inlet ports configured to mix the plurality of fluids in a controlled manner to provide a fluid composition, the manifold including a plurality of fluid conduits internal to the manifold, each of the plurality of fluid conduits receiving fluid through a respective one of the plurality of inlet ports, each of the plurality of fluid conduits operatively communicable to a respective actuation mechanism configured to open and close each of the plurality of fluid conduits in a controlled manner, a common outlet port configured to receive the fluid composition, and a passive fluidic dampening system configured to dampen unwanted fluidic pressure pulses in the manifold where at least one of the plurality of fluid conduits is compliant.

Disclosed is a gradient proportioning valve for use in liquid chromatography that includes a plurality of inlet ports configured to receive a plurality of fluids, a manifold connected to each of the plurality of inlet ports configured to mix the plurality of fluids in a controlled manner to provide a fluid composition, the manifold including a plurality of conduits internal to the manifold, each of the plurality of conduits receiving fluid through a respective one of the plurality of inlet ports, each of the plurality of conduits operatively communicable to a respective actuation mechanism configured to open and close each of the plurality of conduits in a controlled manner, a common outlet port configured to receive the fluid composition, and an active fluidic dampening system configured to dampen unwanted fluidic pressure pulses in the manifold. Liquid chromatography systems and methods are further disclosed.

A device for use by an individual varying in form, i.e. shape, during its use and allowing for the user to select multiple variations of form either discretely or in combination and for these dynamic variations to be controllable simultaneously and interchangeably while being transparent to the normal use of the device, including the ability to insert, withdraw, rotate, and actuate the variable features manually or remotely. According to embodiments of the invention localized and global variations of devices are implemented using fluidics and electromagnetic pumps/valves wherein a fluid is employed such that controlling the pressure of the fluid results in the movement of an element within the device or the expansion/contraction of an element within the device.

A fluid damper includes a body defining a fluid chamber and a first opening. The body is formed by a first cover and a second cover joined along an axial direction. A damping device is suspended inside the fluid chamber to damp pressure pulsations. The damping device is constrained by a peripheral edge. The damping device divides the fluid chamber into first and second sub-chambers. The first cover has a first wall portion into which a second wall portion of the second cover is received. A hermetic seal is formed between the first and second wall portions. The second cover has a terminal edge lying within the first wall portion of the first cover, the terminal edge being segmented into a plurality of fingers that cooperate with a ledge surface of the first cover to pinch the peripheral edge of the damping device.

A fluid damper includes a body defining a fluid chamber and a first opening. The body is formed by a first cover and a second cover joined along an axial direction. A damping device is suspended inside the fluid chamber to damp pressure pulsations. The damping device is constrained by a peripheral edge. The damping device divides the fluid chamber into first and second sub-chambers. The first cover has a first wall portion into which a second wall portion of the second cover is received. A hermetic seal is formed between the first and second wall portions. The second cover has a terminal edge lying within the first wall portion of the first cover, the terminal edge being segmented into a plurality of fingers that cooperate with a ledge surface of the first cover to pinch the peripheral edge of the damping device.