The present disclosure relates to a liquid crystal (LC) display field and discloses an LC pump. The LC pump may include a case; a second linear container arranged within the case; and a nozzle arranged at the bottom of the case. The second linear container may include an LC delivery channel and at least two LC inlets. And LC may flow through the LC inlets and the LC delivery channel sequentially and then may be ejected from the nozzle.

A method of remanufacturing a fluid end block having a plurality of segments adapted to receive working fluid includes removing at least one damaged segment from the plurality of segments of the fluid end block. The method also includes providing at least one replacement segment at a location of the at least one damaged segment. The method further includes providing a seal between a first surface of the at least one replacement segment and a first surface of at least one adjacent segment of the plurality of segments. The method includes coupling the at least one replacement segment with the at least one adjacent segment to form a remanufactured fluid end block.

A method of remanufacturing a fluid end block having a plurality of segments adapted to receive working fluid includes removing at least one damaged segment from the plurality of segments of the fluid end block. The method also includes providing at least one replacement segment at a location of the at least one damaged segment. The method further includes providing a seal between a first surface of the at least one replacement segment and a first surface of at least one adjacent segment of the plurality of segments. The method includes coupling the at least one replacement segment with the at least one adjacent segment to form a remanufactured fluid end block.

An exemplary refill unit for an dispenser includes a container for holding a liquid. The container has bottom side with a neck extending from the bottom side. A pump is connected to the neck of the container. The pump has a liquid pump portion that has a liquid pump inlet. The liquid pump inlet is located above the bottom of the container. A shroud is located over the liquid pump inlet and extends downward toward the bottom of the container. An air bleed valve is included and located in the top of the shroud.

An exemplary refill unit for an dispenser includes a container for holding a liquid. The container has bottom side with a neck extending from the bottom side. A pump is connected to the neck of the container. The pump has a liquid pump portion that has a liquid pump inlet. The liquid pump inlet is located above the bottom of the container. A shroud is located over the liquid pump inlet and extends downward toward the bottom of the container. An air bleed valve is included and located in the top of the shroud.

Methods and systems for a mechanically driven pump are provided. The mechanically driven pump may apply a piston simultaneously to operate as a guillotine blocking valve and a component to transfer motive force. A spring may apply a force to the piston to oppose a force that is applied to the piston via a cam lobe. The mechanically driven pump exhibits a differential pressure at a calibrated orifice during two working phases of the pump (expansion and compression), which provides for a non-zero volumetric efficiency of the mechanically driven pump.

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.

An apparatus for pumping a fluid from a fluid inlet to a fluid outlet is disclosed. The apparatus comprises: a spool axially movable within a cavity, wherein a first chamber is located at a first axial end of the cavity and a second chamber is located at a second axial end of the cavity, wherein the volume of the first chamber and the second chamber varies depending upon the axial position of the spool within the cavity; a valve movable between a first position and a second position, wherein in the first position the valve is configured to convey fluid from the fluid inlet to the first chamber and from the second chamber to the fluid outlet, and in the second position the valve is configured to convey fluid from the fluid inlet to the second chamber and from the first chamber to the fluid outlet.

Systems and methods for analyzing an infusion pump are provided. One infusion pump analyzer includes a fluid flow path configured to be coupled to an infusion pump to be tested and a pair of fluid chambers. The infusion pump analyzer further includes dual linear piston pumps coupled with the pair of fluid chambers and the fluid flow path to control the flow of fluid therethrough, and a valve coupled with the pair of fluid chambers and configured to rotate to selectively fill and drain the pair of fluid chambers.

The invention relates to a fluid compression apparatus comprising a first and a second compression chamber, an intake system communicating with the first compression chamber, a transfer system communicating with the first and second compression chambers, and a mobile piston for ensuring the compression of the fluid in the first and second compression chambers. The apparatus further comprises a discharge port which communicates with the second compression chamber and is configured to allow the outlet of compressed fluid, wherein the second compression chamber is defined by a part of the body of the piston and a fixed wall of the apparatus, the piston being translationally mobile according to a longitudinal direction, the piston having a tubular portion mounted around a fixed central guide, a terminal end of the central guide forming the fixed wall defining a part of the second compression chamber. The apparatus further comprises a sealing system formed between the central guide and the piston according to the longitudinal direction of translation of the piston, the intake system being located at a first end of the apparatus, the discharge port being located at a second end of the apparatus and the transfer system being located between the intake system and the discharge port.