A fluid pumping device is disclosed. The fluid pumping device includes a housing having a front end and a rear end, a fluid discharge opening in the front end of the housing, a pump assembly, a crank assembly rotatably connected to the pump assembly wherein the crank assembly operates the pump assembly, and a fluid storage reservoir connected to the gear housing from which fluid is drawn into the gear housing to be pumped through the fluid discharge opening.

The present invention discloses an anti-decompression gear fuel pump for broken bubbles, characterized by comprising: a drive motor; and a pump body and a pump cover successively installed on the top end of the drive motor, wherein the pump body is provided with a groove, and a driving gear, a left driven gear and a right driven gear which are installed in the groove and are linked through a motor shaft of the drive motor; meanwhile, the driving gear is respectively internally engaged with the left driven gear and the right driven gear; the pump cover is provided with an A end of a fuel outlet, a D end of a circulating fuel outlet, a B end of a circulating fuel inlet, and a C end of a fuel inlet; and the A end of the fuel outlet, the D end of the circulating fuel outlet, the B end of the circulating fuel inlet, and the C end of the fuel inlet are penetrated into the groove of the pump body. The anti-decompression gear fuel pump for broken bubbles, designed in the present invention, not only solves a decompression problem generated because bubbles appear in a fuel pipeline, but also has scientific and reasonable structure.

The invention relates to a pump (2) intended to pump an additive in an SCR system for a vehicle. The pump is configured to rotate in a first direction of rotation in order to convey additive stored in a tank towards an injector via an injection channel. The pump includes a chamber (23) which houses a gear system (22). The chamber (23) is in fluid communication with the tank and the injection channel via an inlet channel (24) and an outlet channel (25) respectively. The pump is such that the inlet channel and the outlet channel are arranged so that after draining the injection channel, the chamber collects and retains the additive.

A balance shaft module includes a balance shaft for receiving a driving force from a crankshaft of an engine by a driving gear and rotating inside a balance shaft housing, an oil pump gear being geared with the driving gear to rotate along with the driving gear, an oil pump shaft having the oil pump gear press-fitted therein and rotating as the oil pump gear rotates, and an oil pump assembly mounted in the oil pump shaft and pumping oil as the oil pump shaft rotates, wherein a pair of support rings is provided at both side surfaces of the oil pump gear to support both side portions of the oil pump gear in the oil pump shaft.

An engine fuel control system includes a main pump which receives fuel from a low pressure source and delivers the fuel at a first high pressure, and a variable displacement augmenter pump which receives fuel from the low pressure source and delivers the fuel at a second high pressure. The augmenter pump has a servo-controller to vary its pump flow rate. The system includes an augmentation valve which is actuatable by an electrically operated control valve to open a flow path therethrough which diverts fuel delivered by the augmenter pump or to shut the flow path. The system includes a pressure drop control valve which senses a pressure differential between the second high pressure and a reference pressure, and controls the servo-controller to vary the pump flow rate of the augmenter pump. The pressure drop control valve spills some of the fuel delivered by the augmenter pump.

An air ejection port for ejecting air-mixed oil is structured with a first air ejection port provided on the inner peripheral side from an inscribed circle of an outer rotor and a second air ejection port provided on the outer peripheral side from a circumscribed circle of the inner rotor, the air ejection port can have an enlarged port area as the total of area of the first air ejection port and area of the second air ejection port in a state without being in communication with either of a suction port and a discharge port, and a disadvantage that a pump chamber of a previous stroke and a pump chamber of a subsequent stroke communicate with each other through the air ejection port can be avoided.

A batching/delivering system for delivering and batching high viscosity products, having at least one managing and actuating device, where the managing and actuating device have at least one control motor and at least one remotely-actuated volumetric batching pump for delivering and batching high viscosity products. The remotely-actuated volumetric batching pump has at least one sucking, volumetrically batching and delivering element with a first duct for sucking the product to be batched, at least one volumetric batching device of the product, and at least one second duct for exiting the product batched by the device. The device is connected to at least one control motor of the device by interposing at least one flexible rotary shaft.

This disclosure concerns an advanced nutating positive displacement device having a high power to mass ratio and low production cost. This device in one example forms an exemplary pump as will be discussed in detail. The examples disclosed herein are of the rotary positive displacement type, but in a class by themselves. The devices are formed by a nutating rotor having a face comprising lobes and valleys, and a fixed stator also having a face with lobes and valleys. The face of the rotor opposes and cooperates with the face of the stator. The opposing faces define chambers that change volume with rotation of the rotor.

A gear pump for transporting a fluid includes a pump casing; and a gear assembly which is accommodated in the pump casing. The gear assembly includes a driving gear, a driven gear that mashes with the driving gear, a driving gear shaft to which the driving gear is attached, a driven gear shaft to which the driven gear is attached, and a bearing frame that rotatably supports the driving gear shaft and rotatably supports the driven gear shaft.

An electric oil pump constructed by integrally combining an electric motor with an oil pump, wherein the electric motor is composed of a motor casing, a drive shaft that is disposed in a motor housing chamber formed inside the motor casing and is rotatably supported, a rotor that is disposed on the drive shaft, and a stator that is located inside the motor housing chamber and is attached to the motor casing. The electric oil pump is equipped with an internal controller that controls application of electric power to the stator so as to cause the drive shaft to be driven to rotate via the rotor.