Abstract: Liquid from a body of liquid is pumped using two liquid columns connected to a sealable conduit containing gas. The liquid columns are also connected to another conduit having a switched valve. Pumping is initiated by extracting gas from the sealed conduit. Liquid exits one of the liquid columns through the switched valve. Lowering of the liquid level in one of the liquid columns moves gas in the sealed conduit. This in turn induces pumping liquid from the body of liquid in another one of the liquid columns. When the liquid level reaches a minimum in the liquid column, the switched valve changes position, blocking a liquid flow from the liquid column and allowing liquid in the other of the liquid column to exit.

Abstract: A piston type pumping apparatus comprises a vertically oriented cylinder having a top and a bottom with a first aperture. There are first and second passageways for liquid in the cylinder at the top and bottom respectively thereof. A piston is reciprocatingly mounted within the cylinder and has an area against which pressurized fluid acts in the direction of movement of the piston. A hollow piston rod is connected to the piston and extends below the piston and slidably through the first aperture. There is a reload chamber below the cylinder. The piston rod extends slidably into the reload chamber and has a third passageway for liquid communicating thereto. A first one-way valve is located in the third passageway. There is also a fourth passageway that extends from the reload chamber to a source of liquid to be pumped and a second one-way valve therein.

Abstract: A System and Method for Explosion-Proof Pump is provided that includes a component being mated to and sealed against an adjacent component. An embodiment provides that the component is a switch housing having a cavity formed therein. A switch is secured in the cavity and the adjacent component is selected from the group access plate and motor housing.

Abstract: A liquid hydrocarbon slug-containing vessel for incorporation into a system integrating a low-pressure separator with a vapor recovery process system, and a method for regulating the temperature of a gas to be compressed by a two stage compressor so as to prevent liquification of the gas and to prevent over-heating of the compressor.

Abstract: A fluid pump for a fuel dispensing unit comprises a pump housing with a first chamber and a second chamber, each chamber having a fluid inlet valve and a fluid outlet valve, respectively. The chambers are separated by a movable piston arranged to repeatedly decrease and increase the volumes of the chambers. The piston comprises a magnetic device, and an electromagnetic control configured to move the piston by altering a magnetic field, for repeatedly decreasing and increasing the volume of the chambers. A controllable fluid flow passage connected to first chamber and to the second chamber that allows fluid to pass from the first chamber to the second chamber without passing through the any of the fluid inlet valves or the fluid outlet valves so that when there is a flow of fuel from the first chamber to the second chamber via the fluid flow passage and when the piston moves towards the first side the first outlet valve and the second inlet valve remain closed during operation.

Abstract: A pump and a method for operating a pump is proposed for mounting an impeller, which is inexpensive, free from contact and wear and thus extremely permanent. For this the invention uses a combination of permanent magnetic bearings and flow-mechanical bearings. The mounting is thus based on purely passive elements without using actively controlled and/or regulated elements.

Abstract: A rotary blood pump includes a casing defining a pumping chamber. The pumping chamber has a blood inlet and a tangential blood outlet. One or more motor stators are provided outside of the pumping chamber. A rotatable impeller is within the pumping chamber and is adapted to cause blood entering the pumping chamber to move to the blood outlet. The impeller has one or more magnetic regions. The impeller is radially constrained in rotation by magnetic coupling to one or more motor stators and is axially constrained in rotation by one or more hydrodynamic thrust bearing surfaces on the impeller.

Abstract: A suction pump, in particular a breast pump, comprises a bleed valve with a bleed opening, a bleed body which seals the bleed opening and an electromagnet for operating the bleed body. The bleed body may be operated such that upon opening the valve initially only a partial region of the bleed opening is released and subsequently a greater part thereof or the whole bleed opening is released. The suction pump provides a large functionality with the smallest size and, furthermore, is cheap to produce and easily assembled.

Abstract: A flow set for administration of liquid when using a liquid pump is disclosed. The flow set of the present invention permits identification of the flow set by a liquid pump that uses this flow set and prevention of pumping tube-segment over stretching.

Abstract: The invention concerns a hose cartridge for a peristaltic pump comprising a cartridge housing, comprising a flexible pump hose segment extending through the cartridge housing, wherein both ends of the pump hose segment are fixed in the cartridge housing by a first fixing member and a second fixing member, wherein the first fixing member and the second fixing member are arranged in the area of a first front face of the cartridge housing, and wherein the cartridge housing includes a recess for the engagement of a roller wheel of the pump in the interior of the cartridge housing. It is characterized by that the pump hose segment extends in the hose cartridge along a circular segment (K) spanning an angle of at least 90°, when the hose cartridge is not inserted into the pump.

Abstract: A hydraulic power unit having a power shaft that rotates a cam. The cam actuates a piston assembly that contains a plurality of pistons wherein each piston has a piston body and fluid working chamber. An electrically actuated bypass valve is fluidly connected and in communication between an outlet check valve and a fluid working chamber of each piston such that when actuated the electrically actuated bypass valve directs fluid away from the outlet port into a reservoir to be returned to an inlet port.

Abstract: A rod pump control system includes a parameter estimator that determines from motor data parameters relating to operation of the rod pump and/or downhole dynamometer card without the need for external instrumentation, such as down hole sensors, echo meters, flow sensors, etc. In one embodiment, instantaneous motor current and voltage together with pump parameters are used in determining rod position and load. The rod position and load are used to control the operation of the rod pump to optimize the operation of the pump. Also disclosed in a pump stroke amplifier that is capable of increasing pump stroke without changing the overall pumping speed, or in the alternative, maintaining the well output with decreased overall pumping speed.

Abstract: A variable displacement variable pressure vane pump system provides lubrication oil to a mechanical system. The pump system includes a first control mechanism to apply a force to a control slider to counter a biasing force of a biasing spring and urge the control slider away from a position corresponding to a maximum displacement position of the pump. A second control mechanism applies a force to the control slider to alter the displacement of the pump. A control varies the supply of lubrication oil to the second control mechanism to alter the output of the pump to closely correspond to the lubrication requirements of the mechanical system.

Abstract: A vapor recovery pump for a fuel dispensing unit, comprising a housing with two chambers each having a vapor inlet valve and a vapor outlet valve, respectively, the chambers being separated by a movable piston arranged to move a distance between a first and a second end position inside the housing for continuously decreasing and increasing the volume of the chambers. A control element is arranged to selectively vary the location of the first end position.

Abstract: A submersible pumping system includes a pump assembly, a motor and a seal section positioned between the pump assembly and the motor. The seal section includes a clean fluid circulation system, a contaminated fluid circulation system and at least one bag seal assembly. The bag seal assembly includes an upper mounting block, a lower mounting block and a bag seal extending over the upper mounting block and lower mounting block and providing a path for the clean fluid circulation system. The bag seal assembly further includes a mounting plate connected to the upper mounting block that limits the axial travel of the bag seal on the upper mounting block. The bag seal assembly optionally includes a breather tube connected to the mounting plate and extending along the exterior of the bag seal.

Abstract: The invention relates to a piston pump for a vehicle braking system, with a housing section and a piston, which is guided in the housing section in a slidable manner. An accommodating member for accommodating an intake valve is provided in the housing section, and a sealing element adjoins the accommodating member to seal the piston against the housing section. A piston rod adjoins the sealing element which is embodied in one piece with the accommodating member.

Abstract: A jet suction pump (9) has a pump fluid nozzle (13) with a round nozzle opening, a mixing tube (14), a suction opening, a suction line (12) arranged thereon and a canister (8), in which at least a part of the mixing tube (14) is arranged. The base (16) of the canister (8) has a non-planar embodiment (17-19).

Abstract: A control device for controlling a shower waste pump, includes a housing, a pump setting, and an over-run setting. The pump setting, by way of a control element, preferably a manually adjustable potentiometer, allows selective setting of a maximum pumping capacity of the waste pump. The over-run setting, also by way of a control element, allows selective setting of an over-run period from a predetermined range during which the waste pump continues to operate after fluid flow through the waste pump has ceased or substantially ceased. The over-run setting and the pump setting together optimize operation of the waste pump, so that the over-run period of the waste pump can be set based on the selected maximum pumping capacity.

Abstract: The present invention discloses a compressor including a compressor main body (20) for compressing refrigerant, a shell (100) for accommodating the refrigerant and the compressor main body (20), and mounts (130) attached to the front and rear of the shell (100) for the installation of the shell (100), and having a natural frequency controlled according to a natural frequency of the shell (100) for the dynamic vibration absorption. In an assembly state where the compressor main body (20) and the shell (100) are completely coupled to each other, the shell (100) is exited by an impact hammer and the natural frequency of the shell (100) is measured. As the natural frequency of the mount (130) is controlled according to the natural frequency of the shell (100) to absorb vibration, Vibration of the shell (100) can be prevented. That is, the mount functions as a dynamic vibration absorber to suppress vibration and noise of the shell (100).

Abstract: A fluid machine with radial cylinders, includes cylinders being fixed with respect to a body wherein the cylinders are peripherally spaced in a rotation plane of a crank rotating with a driving shaft of the machine, elements distributing a fluid, a piston of each cylinder placed in contact with a surface of the crank by a sliding member, the piston of each cylinder being placed within a jacket of the cylinder with contact of a side surface of the piston in a guide and sealing area which is small with respect to the side surface of the piston, and for a guide function an annular edge is present and projecting from an inner surface of the jacket, and for a sealing function a sealing ring is present on the jacket and housed in an annular slot which is parallel and attached to the annular edge, and rings maintaining the contact between the pistons and the crank.